a river flows toward the east. because of your knowledge of physics, you head your boat 53 degrees west of north
Answers
Velocity of the current is 2.7 m/s and the velocity of the boat relative to the water is 4.8 m/s.
Define the velocity?The pace at which a moving object's location changes as seen from a specific frame of reference and as measured by a specific time standard is known as its velocity. In kinematics, the area of classical mechanics that studies how bodies move, velocity is a fundamental idea.
Given:
\(West\;of\;north\;angle,\;\alpha=56\;^{\circ}\)
\(Velocity\;of\;boat\;relative\;to\;shore,\;V_{b} = 4 m/s\)
From the right angle triangle ABC, (see the attached figure)
\(sin\;\alpha=\frac{V_{b} }{V_{b,c} }\)
\(V_{b,c}=\frac{V_{b} }{sin\;\alpha}\)
Substitute the known values in the above equation,
\(V_{b,c}=\frac{4}{sin\;56^{\circ}}\)
By solving the above equation, We get
\(Velocity\;of\;boat\;relative\;to\;water,V_{b,c}=4.8\;m/s\)
\(cos\;\alpha=\frac{V_{c} }{V_{b,c} }\)
\(V_{c}={V_{b,c}}\times{cos\;\alpha}\)
Substitute the known values in the above equation,
\(V_{c}={4.8}\times{cos\;56^{\circ}}\)
By solving the above equation, We get
\(Velocity\;of\;current,\;V_{c}=2.7\;m/s\)
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Related Questions
PLEASE HELP THIS IS DUE LIKE HELP ME PLEASE
On the image at the right, select the point where the pendulum swings fastest. Then, select two points with a velocity is zero.
Answers
Answer:
At the end points of motion (either side) the velocity must be zero because the velocity is changing from - to + (it can't turn around around without passing thru zero,
The velocity will then increase to the midpoint of the motion.
m g h = 1/2 m v^2 where h is the vertical distance thru which the pendulum travels
Eating eggs for breakfast increases grades. What is the constant?
Answers
Answer and Explanation:
The answer would be: Breakfast
Breakfast would be the constant of this scenario because this doesn't change. The time of day (for eating eggs) will always be in the morning, so that wouldn't change.
Eating eggs would be the independent variable because you can change this value. This could be a different food or an amount of the food that is being eaten.
The grades would be the dependent variable because the score depends on the eating of eggs.
#teamtrees #PAW (Plant And Water)
I hope this helps!
a ball is thrown vertically upward with a velocity of 20m/s from the top of a multistory building. the height of the point where the ball is thrown is 25 m from the ground. then find a. how height will the ball rise?
B how long will it be before the ball hip the ground?
Answers
A ball is thrown vertically upward with a velocity of 20m/s from the top of a multistory building. The height of the point where the ball is thrown is 25 m from the ground. The height will the ball rise is 20m. 5s long will it be before the ball hip the ground.
What is velocity ?The direction of a body or object's movement is defined by its velocity. In its basic form, speed is a scalar quantity. In essence, velocity is a vector quantity. It is the speed at which distance changes. It is the displacement change rate.
A. for solving how high will ball go , velocity at the top point will be 0 this gives ,
s = v² - u² / 2a
= 0 - 20² / -2 × 10
= 20m
B. Time to reach maximum height can be obtained from v = u + at
0 = 20 + ( − 10 ) t
t = 2s
s = ut + 0.5at²
= 20 ( 2 ) + 0.5 ( −10 ) ( 2 )²
= 20m
Therefore, the total distance for maximum height is 45 m
s = ut + 0.5at²
45 = 0 + 0.5 ( 10 ) ( t )²
t = 3s
Then,
Total time = 3+2
= 5s
Thus, A ball is thrown vertically upward with a velocity of 20m/s from the top of a multistory building.The height will the ball rise is 20m. 5s long will it be before the ball hip the ground.
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Use the following formula and information to find the depth of the seafloor.
Depth = 1/2 * T * 1500
Where T is two-way travel time in seconds, depth is in meters, and 1500 is speed in meters per second.
What is the depth of the seafloor if two-way travel time is 2.62 seconds?
View keyboard shortcuts
Answers
Answer:
The depth of the seafloor is 1965 m if two-way travel time is 2.62 seconds
Explanation:
The formula for depth is,
Depth = 1/2 * T * 1500
If two-way travel time is 2.62 seconds, i.e. T = 2.62s,
Then the Depth is,
Depth = (1/2)(2.62)(1500)
Depth = 1965 m
Select the correct answer from each drop-down menu. andrew pokes a marble, and the marble rolls down a ramp. the marble moves with speed. which forces are acting on the marble in this situation? when andrew pokes the marble, he gives it force. as the marble rolls down the ramp, force pulls it down. the movement of the marble is slowed down by from the ramp.
Answers
A net forward force as well as gravitational force pulls the marble downwards whereas frictional force slows it down.
What is a force?A force is an agent which causes a change in the motion or state of an object.
Forces are of two types:
Contact forces andNon-contact forcesAndrew applies force on the marble causing it to move.
When Andrew pokes the marble, he gives it net forward force. As the marble rolls down the ramp, gravitational force pulls it down.
The movement of the marble is slowed down by frictional force from the ramp.
Therefore, a combination of applied force and gravitational force moves the marble forward, while frictional force slows it down.
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Answer:
Applied, Gravitational, and Frictional.
Explanation
hope it helps :)
Light from a red laser passes through a narrow single slit to form a diffraction pattern. If the width of the slit is increased, what happens to the central maximum? The central maximum shifts to downward on the screen. The width of the central maximum decreases. The width of the central maximum does not change. The central maximum shifts to upward on the screen. The width of the central maximum increases. Two identical light waves, A and B, are emitted from different sources and meet at a point P. The distance from the source of A to the point P is L_A, and the source of B is a distance L_B from P. Which of the following statements is necessarily true concerning the interference of the two waves? A and B will interfere constructively because their amplitudes are the same. A and B will interfere destructively if L_A > L_B. A and B will interfere constructively because their wavelengths are the same. A and B will interfere constructively If L_A - L_B = m lambda, where m = 1/2, 3/2, 5/2, ... A and B will interfere constructively it L_A - L_B = m lambda, where m = 0, 1, 2, 3.... A beam of light passes from air into water. Which is necessarily true? The wavelength is unchanged, and the frequency decreases. The frequency is unchanged, and the wavelength decreases. The wavelength is unchanged, and the frequency increases. The frequency is unchanged, and the wavelength increases. Both the wavelength and the frequency decrease. Both the wavelength and the frequency increase.
Answers
If the width of the slit through which light from a red laser passes to form a diffraction pattern is increased, the width of the central maximum increases.
In the phenomenon of diffraction, light bends around the edges of obstacles or through the edges of an aperture or a slit. The pattern formed on a screen placed on the other side of the obstacle or slit is referred to as a diffraction pattern. In a diffraction pattern formed by a narrow single slit through which light from a red laser passes, the central maximum is the bright region at the center of the pattern.
The intensity of the light in the central maximum is the highest of all the diffraction maxima.The width of the central maximum increases as the width of the slit through which light from a red laser passes to form a diffraction pattern is increased. This is because when the slit width is increased, the amount of diffraction of light increases. The greater the diffraction, the wider the central maximum.
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an air parcel rises over a mountain and cools adiabatically. which lifting mechanism has acted on this parcel?
Answers
The mountain or orographic lifting mechanism has acted on the air parcel, causing it to rise and cool adiabatically as it moves up and over the mountain.
A mountain presents a physical barrier that pushes an air parcel to ascend when it rises over it. Orographic lifting is the term for this procedure. The parcel undergoes a drop in pressure as it rises, which causes adiabatic cooling. The air parcel cools due to adiabatic expansion as it climbs, which causes a decrease in temperature.
The dry adiabatic lapse rate, which measures the temperature drop as 10°C per 1000 metres of climb, is used to describe this phenomenon. The air's ability to condense and form clouds in response to cold may also result in precipitation.
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Orographic lifting mechanism has been used.
Orographic lift of moist air coming off the ocean produces clouds along the Santa Lucia Mountains south of Monterey, California, USA (Credit: NOAA). As an example, the North Shore mountains immediately north of Vancouver often experience heavy rain and snowfall due to orographic uplift.
Detailed Answer - Hi! The lifting mechanism that has acted on the air parcel as it rises over a mountain and cools adiabatically is called Orographic Lifting. This occurs when an air mass is forced to rise over elevated terrain, such as a mountain, causing it to cool and potentially form clouds or precipitation.
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you measure the change of flux and the induced voltage that results when you drop a magnet through a coil. you test two cases. in the first case, you drop the magnet height of 3 cm above the coil. in the second case, you raise the magnet so that it drops 20 cm before entering the coil. which one of the following is a correct statement about what you expect to observe in the second case, compared to the first case?
Answers
The induced voltage in the second case will be higher but the change in flux will be same in comparison to the first case.
In the experiment of measuring the change of flux and the induced voltage,
In the first case the magnet is dropped from a height 3cm of the coil and in the second case the the magnet is raised so that it drops 20cm before entering the coil.
When compare to the first case the second case will have a higher value of induced voltage but the change in flux will be same.
The induced voltage in a coil is given by,
E = dM/dt
dM is change in magnetic flux,
t is time,
As we can see that the time is inversely proportional to the induced emf and in the second case the magnet is drop from a height which allows it to go with the higher velocity in a less time that is why the induced EMF is more in magnitude but because the magnet is same in both the cases the change in flux is constant.
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A skater with a mass of 50 kg is moving at a speed of 5 m/s. Away is their kinetic energy?
Answers
KE = (1/2) * mass * velocity^2
In this case, the skater has a mass of 50 kg and is moving at a speed of 5 m/s. Let's substitute these values into the formula:
KE = (1/2) * 50 kg * (5 m/s)^2
Calculating this expression:
KE = 0.5 * 50 kg * (25 m^2/s^2)
KE = 625 Joules
Therefore, the kinetic energy of the skater is 625 Joules.
please show steps of how you do this
Answers
ANSWER:
D) 1584 m
EXPLANATION:
1) Convert seconds to minutes so we can see which velocity to use for the equation. Then convert the velocity from cm/s to m/s.
120 seconds = 2.0 minutes (now we know what the velocity will be)
1320 cm/s = 13.2 m/s (just divided by 100)
2) We can now find the distance by using the formula: distance = time x velocity
distance = 120 x 13.2
distance = 1584 m
Note: the units for the time must be in seconds (s) and the units for velocity must be in m/s because when we multiply them, the seconds (s) cancel out/eliminate each other so that we are left with just metres (m) for distance.
Deep-sea minerals are considered to be nonrenewable. Which time frame BEST identifies the time it would take for deep-sea mineral deposits to be replaced if they are significantly reduced by mining activities?
-0-10 years
-20-50 years
-75-100 years
-100+ years
Please hurry it’s a test
Answers
The correct answer is "100+ years" because the replacement of these minerals would take a very long time, likely longer than 100 years, even if new deposits are discovered.
When are they replaced?It is currently unknown how long it would take for deep-sea mineral deposits to be replaced if they are significantly reduced by mining activities. Deep-sea minerals are considered non-renewable, which means they form over geological time scales and cannot be replaced within a human lifetime or even many generations.
Deep-sea minerals are considered non-renewable, which means that they cannot be replenished naturally at a rate that meets the current rate of consumption.
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How many moles of a gas sample are in a 5.0 l container at 373 k and 203 kpa?
Answers
In a 5.0 L container at 373 K and 203 KPa there is 0.327 mol of a gas sample.
Ideal gas lawThe number of moles of a gas sample in a container can be calculated using the ideal gas law, which is represented by the equation PV = nRT, where P is pressure, V is volume, n is the number of moles, R is the ideal gas constant, and T is temperature.
Given the volume (V) of the container as 5.0 L, the temperature (T) as 373 K, and the pressure (P) as 203 kPa, we can rearrange the ideal gas law equation to solve for the number of moles (n) as follows:
n = PV/RT
Substituting the given values into the equation, we get:
n = (203 kPa)(5.0 L)/ (8.314 L*kPa/K*mol)(373 K)
n = 1015 kPa*L / (8.314 L*kPa/K*mol)(373 K)
n = 0.327 mol
Therefore, the number of moles of the gas sample in the 5.0 L container at 373 K and 203 kPa is 0.327 mol.
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Type of mirror used as a side mirror on a vehicle to provide a wide angle view...
Answers
Answer:
yes done first thing tomorrow
Answer:
convex mirror is used in vehicle to provide a wide angle view
cuandi viajas en un autoo:¿que es lo que se mueve, tu o lo que te rodea?¿según cual sistema de referencia? explicar
Answers
Answer:
Cuando viajo en un automóvil lo que se mueve soy yo en realidad, estoy tomando como sistema de referencia el mundo externo al automóvil sin embargo si tomamos como un sistema de referencia algún objeto que se encuentre dentro del automóvil entonces lo que se mueve es lo que me rodea
PLEASE ANSWER BOTH QUICK!! 50 POINTS!!! PLEASE DON'T IGNORE!!
Answers
Answer:
A. B. Pls Give Branliest
Explanation:
Answer:
My answer got deleted.. all my brainliests too
Explanation:
A for the first, B for second.
Bumps, Blemishes and Beyond
Imagine that you are working in either a cosmetic surgery clinic or a medical spa, and you
are meeting a client for the first time. They have come to you for a simple procedure, but
when you're doing the consultation with the person, you notice some suspicious-looking
lesions on their skin. You explain to the client that you are concerned about them, and you'd
like them to see their healthcare provider before you can proceed with treatment. They ask
you to write your findings down so that they can share them with their primary care provider.
You are going to search for images of two different types of lesions online and imagine them
to be what your client is presenting with. Using the terminology that you learned about
lesions, describe them in enough detail that someone could picture the areas in their mind
without the images. You will be expected to submit the images to the dropbox to support
your written work. You will need to include the type, shape, distribution, color, size, and
presence of drainage in your descriptions for it to be considered complete.
Answers
Benzoyle peroxide
This chemical helps to eliminate excess oil from the skin, kills acne-causing bacteria, and removes dead skin cells that can block pores. Products containing benzoyl peroxide are sold over the counter in strengths ranging from 2.5% to 10%.
Can blemishes be removed with Vaseline?He continues by saying that the petroleum jelly itself is ineffective at treating the zit. By creating a seal over the skin, it actually aids in protecting the skin barrier as the zit heals.
Do skin imperfections disappear?Scars from acne do not completely disappear on their own. With age, depressed acne scars frequently grow more obvious due to collagen loss in the skin. But there are numerous procedures that might lessen the prominence of acne scars. hyperpigmentation following inflammation or Within a few months, redness could naturally.
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what happens as photons of visible light are absorbed by dye molecules?
Answers
_____ is a satellite-based tracking system that enables users to determine a person’s position.
Answers
Global Positioning System (GPS) is a satellite-based tracking system that enables users to determine a person's position.
This system is used to locate and track the movements of individuals, vehicles, and assets around the world. GPS technology works by utilizing a network of satellites orbiting the Earth that send signals to GPS receivers on the ground. These receivers interpret the signals and calculate the user's precise location, speed, and direction.
GPS technology has a wide range of applications, including navigation, tracking, and mapping. GPS tracking is particularly useful in fleet management, logistics, and emergency response situations. Law enforcement agencies also use GPS technology to monitor the movements of individuals who are under surveillance or subject to electronic monitoring.
GPS technology has revolutionized the way people navigate and interact with the world around them. It has made it easier for individuals to find their way around unfamiliar places and has improved the efficiency and safety of many industries. The widespread availability of GPS technology has also led to the development of new applications and services that make use of location data, such as geotagging and location-based advertising. Overall, GPS technology has had a significant impact on society and will continue to play an important role in shaping the future.
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What will be the approximate angle of elongation for Comet Halley on this significant day?
a. approximately 45 degrees eastern elongation viewed in the morning sky
b. approximately 45 degrees eastern elongation viewed in the evening sky
c. approximately 45 degrees western elongation viewed in the morning sky
d. approximately 45 degrees western elongation viewed in the evening sky
e. cannot be determined-insufficient information
Answers
The approximate angle of elongation for Comet Halley on this significant day would be approximately 45 degrees western elongation viewed in the evening sky. The correct answer is option (D).
When a celestial object is in elongation, it means that it is at its maximum angular separation from the Sun as seen from Earth. In the case of Comet Halley, it is specified that the elongation is 45 degrees. Since the elongation is western, it means that the comet is positioned to the west of the Sun. This means that it would be visible in the evening sky.
Therefore, option D, approximately 45 degrees western elongation viewed in the evening sky, is the correct answer. To summarize, the approximate angle of elongation for Comet Halley on this significant day would be approximately 45 degrees western elongation viewed in the evening sky.
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Question 7 of 10
Which of the following phrases best describes the term scientific model?
A. A simplified representation used to explain or make predictions
about something
B. The application of scientific knowledge to make predictions about
an object, system, or process
C. A physical copy of a scientific object, system, or process
Answers
Answer:
my answer to that question was c
Explanation:
What property of an object describes its natural tendency to resist an acceleration?
Answers
In fact, it is the natural tendency of objects to resist changes in their state of motion. This tendency to resist changes in their state of motion is described as inertia. Inertia = the resistance an object has to a change in its state of motion.
The cheetah can run 103 km/h, a falcon can
fly 148 km/h, and a sailfish can swim 92 km/h.
The three of them run a relay with each covering a distance L at maximum speed.
What is the average speed of this relay
team?
Answer in units of km/h.
Answers
Answer: 109.9 km/h
Explanation:
To find the average speed of the relay team, we need to determine the total distance covered by the three animals and the time it takes for them to complete the race. Assuming each animal runs/swims at maximum speed for distance L, we can calculate the time it takes for each animal to complete its part of the relay as:
Cheetah: Time taken = Distance / Speed = L / 103
Falcon: Time taken = Distance / Speed = L / 148
Sailfish: Time taken = Distance / Speed = L / 92
Since the three animals take turns to complete the race, the total time taken for the relay race would be the sum of the time taken by each animal:
Total time taken = L/103 + L/148 + L/92
To find the average speed, we need to divide the total distance covered (3L) by the total time taken:
Average speed = Total distance / Total time
= 3L / (L/103 + L/148 + L/92)
= 3 / (1/103 + 1/148 + 1/92)
= 109.9 km/h (rounded to one decimal place)
Therefore, the average speed of the relay team is approximately 109.9 km/h.
Regenerate response
solve: A car travels 2 km North , 10 km East, then 3 km West. pythagorean theorem
Answers
________b_____ 7 km east
|
| 2km north.
|a
|
°
pythagorean theorem : ✓a² + b² = c²
c² = a² + b² = 4 + 49 = 53
c = ✓53 km
displacement = c = ✓53 km
distance = 10 + 3 + 2 = 15 km
Consider an incandescent lightbulb. If you wanted to turn a 10-w lightbulb into a 100-w lightbulb, how would you change the temperature of the filament inside the bulb?.
Answers
By using the blackbody radiation formula, the temperature of the filament inside the bulb is changed by a factor of 10⁰'²⁵.
We need to know about black body radiation to solve this problem. The energy radiated by a black body object is proportional to the area and the fourth power of temperature. It can be determined as
P = A . e . σ . T⁴
where P is power, A is surface area, e is emissivity, σ is Stefan Boltzmann's constant ( 5.67 x 10¯⁸ W/m²K⁴) and T is temperature.
From the question above, we know that
P1 = 10 watt
P2 = 100 watt
T1 = T1
By using the black body radiation formula, the ratio of temperature is
T1⁴ / T2⁴ = P1 / P2
Hence,
T1⁴ / T2⁴ = P1 / P2
T1⁴ / T2⁴ = 10 / 100
T1⁴ / T2⁴ = 1 / 10
T2⁴ = 10T1⁴
T2 = ⁴√(10T1⁴)
T2 = T1 x 10⁰'²⁵
Thus, the temperature of the filament inside the bulb is changed by a factor of 10⁰'²⁵.
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Which of the following sequences correctly describes the stages of life for a low-mass star?
1. red giant, protostar, main-sequence, white dwarf
2. white dwarf, main-sequence, red giant, protostar
3. protostar, main-sequence, red giant, white dwarf
4. protostar, red giant, main-sequence, white dwarf
5. protostar, main-sequence, white dwarf, red giant
Answers
The correct sequence that describes the stages of life for a low-mass star is option 3: protostar, main-sequence, red giant, white dwarf.
A cloud of gas and dust gravitationally collapses to become a protostar. The protostar heats up as it continues to compress, reaching a point where its core's temperature and pressure are high enough to initiate nuclear fusion. This is the start of the main-sequence phase, during which the star will continuously burn hydrogen into helium for the majority of its existence.
The core of the star will contract and heat up as it burns through its hydrogen fuel, which will cause the outer layers to expand and cool. As a result, the star enters the red giant phase, where it multiplies in size, brightens dramatically, and turns redder.
So, for a low-mass star, the proper progression is protostar, main-sequence, red giant, and white dwarf.
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The state in which the inside of each heart cell is negatively charged and the outside is positively charged is:
Answers
Answer:
Resting state
Explanation:
A microwave transmitter emits electromag-
netic waves of a single wavelength. The max-
imum electric field 0.963 km from the trans-
mitter is 8.04 V/m.
The speed of light is 2.99792 x 108 m/s
and the permeability of free space is 47 x
10-7 N/A².
a)Assuming that the transmitter is a point
source and neglecting waves reflected from
the Earth, calculate the maximum magnetic
field at this distance.
Answer in units of T.
b)Calculate the total power emitted by the
transmitter.
Answer in units of W.
Answers
E = cB
B = E/c
In this case, E = 8.04 V/m, c = 2.99792 x 108 m/s
B = 8.04 V/m / 2.99792 x 108 m/s = 2.68 x 10^-9 T
The maximum magnetic field at 0.963 km from the transmitter is 2.68 x 10^-9 T.
b) To calculate the total power emitted by the transmitter, we can use the formula P = E^2/ Z, where P is the power, E is the electric field, and Z is the impedance of free space which is (377 ohm).
P = E^2 / Z
In this case, E = 8.04 V/m, Z = 377 ohm
P = 8.04 V/m² / 377 ohm = 2.13 x 10^-4 W
The total power emitted by the transmitter is 2.13 x 10^-4 W.
(d) Calculate the equivalent resistance of three resistors each of 1202 when (i) connected in series (ii)when connected in parallel.
Answers
Answer:
See below
Explanation:
I will assume each resistor is 120 ohms
in series , the resistance just sums.... to 120 + 120 + 120 = 360 ohms
in parallel they are 1 / (1/120 + 1/120 + 1/120) = 1/ (3/120) = 40 ohms
Answer below, only if you know the answer, please. :)
Answers
Answer:
c. The smallest part of helium
Water molecule \(\rm (H_2O)\) is not an example of an atom. Two hydrogen atoms (H) bond with one oxygen atom (O) to make the chemical. Therefore, the correct option is A.
The fundamental unit of matter is the atom, which is composed of an electron-orbiting nucleus containing protons and neutrons. It is the smallest, indivisible unit of an element and it still has all of its original chemical properties.
Options B and C, on the other hand, give a detailed description of specific chemical elements such as oxygen and helium, which are examples of atoms. The fundamental building block of an element is an atom, which is made up of an electron-bound nucleus (which consists of protons and neutrons).
Therefore, the correct option is A.
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Why is the use of carbon- 14 dating limited?
Answers
Answer:
because carbon 14 has only a short half life, rather than other elements with longer half lives.
Explanation:
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