The appropriate answer is E. just as it moves free of the spring, the box will be traveling four times as fast as before.
The potential energy of a stretches spring is the energy required by the spring to do a work. It can be expresses as:
PE = -1/2 kx^2
where PE is the potential energy of the spring, k is the force constant of the spring, and x is the compression.
NB: the minus sign implies compression.
Given that the spring was compressed to 2x, then;
PE = -1/2 k(2x)^2
= 1/2 *4kx^2
PE = -2kx^2
So that,
new PE = 4PE (initial PE when compression was x)
Therefore, the box will travel 4 times as before.
The required answer is option E. just as it moves free of the spring, the box will be traveling four times as fast as before.
Learn more about potential energy of a compressed spring at https://brainly.com/question/29223972
#SPJ1
Why do you think a pickup coil is called a pickup coil? PLEASE HELP!
Answer:refers to a sensor device that is housed inside a motor rotor
Explanation:
A tennis ball has 10 J of energy when it is 1 m above the floor.
Name the store associated with this
energy.
The store associated with the energy when a ball has 10 J of energy when it is 1 m above the floor is gravitational potential energy
What is gravitational potential energy?
Gravitational potential energy is the energy of a body by virtue of its position in the gravitational field.
From the question, If a tennis ball has 10 J of energy when it is 1 m above the floor, first, a work of 10 J was done against gravity to lift the tennis from the floor to a height of 1 m. At the height of 1 m, the work of 10 J is converted to the gravitational potential energy of the tennis ball which is stored in the ball.
Hence, The energy associated when a tennis ball has 10 J of energy and it is 1 m above the floor is gravitational potential energy.
Learn more about gravitational potential energy here: https://brainly.com/question/15896499
imura lifts a box by bending at the knees, then slowly standing up and holding the box away from her body. is this an effective and safe lifting technique?
No, as she kept the box a safe distance from her body. As closely as you can, hug the load to your body.
Which three safe lifting methods are there?Lift gradually by extending your hips and knees (not your back). As you raise, keep your back straight and avoid twisting. Hold the load at the level of your belly button, as near to your body as you can.
Safe lifting technique?Keep the burden as near to your body as you can, if at all possible. Perhaps this is preferable to fiercely clutching it in your hands. As opposed to either entirely flexing your back (stooping) or fully flexing your hips and knees (full/deep squatting), it is ideal to slightly bend your back, hips, and knees at the beginning of the lift.
To know more about lifting methods visit:-
https://brainly.com/question/14862609
#SPJ4
Please help AP Physics!!!
A simple pendulum consists of a sphere tied to the end of a string of negligible mass. The sphere is pulled back until the string is horizontal and then released from rest. Assume gravitational potential energy is zero when the sphere is at its lowest point. What angle will the string make with the horizontal when the kinetic energy and the potential energy of the sphere-Earth system are equal?
Greater than 45°
Equal to 45°
Less than 45°
It cannot be determined without knowing the mass of the sphere.
Answer:
Explanation:
Less than 45!
The angle that the string will make horizontally while Kinetic Energy and Potential Energy being equal of the sphere-Earth system would be:
C). Less than 45°
Given that,
Gravitational potential energy = 0
Mass = negligible
Since the body is released from the state of rest and the sphere is present its lowest point, the angle(θ) that it creates would be :
\(mgh =\) \(\frac{1}{2} mv^2\) (\(v = L,\) θ)
θ = less than 45°.
θ < 45°
Thus, option C is the correct answer.
Learn more about "Kinetic Energy" here:
brainly.com/question/9349250
The device is 50% efficient. Which equation is correct? A input energy = useful output energy ÷ 2 B useful output energy =wasted output energy ÷ 2 C wasted output energy = useful output energy D wasted output energy = useful output energy ÷ 2
Answer:
C - wasted output energy = useful output energy
Explanation:
Useful output + wasted output ALWAYS equals input energy. If the device is 50% efficient, that means that 50% of the input energy is converted into useful output energy, and 50% is converted to wasted output energy. The wasted output energy is equal to the useful output energy.
can an object be accelerated while traveling at constant velocity? Why or why not?
Answer:
No: (V2 - V1) / t = a
If the vector velocity of the object does not change during time t then there is no defined acceleration
You work in a materials testing lab and your boss tells you to increase the temperature of a sample by 34.1 C. The only thermometer you can find at your workbench reads in degrees Fahrenheit. Part A If the initial temperature of the sample is 62.4 °F, what is its temperature in degrees Fahrenheit when the desired temperature increase has been achieved? Express your answer in degrees Fahrenheit to three significant figures.
The final temperature of the sample in degrees Fahrenheit when the desired temperature increase has been achieved is `123.78°F.`
The initial temperature of the sample is 62.4 °F. The boss instructs us to raise the temperature by 34.1°C. We need to determine the final temperature of the sample. Here's how we can do it.
Step 1: Use the conversion formula for Celsius to Fahrenheit.
C = (F - 32) x 5/9F = (C x 9/5) + 32where C is the temperature in Celsius and F is the temperature in Fahrenheit.
Step 2: Convert the initial temperature of the sample from Fahrenheit to Celsius.
C = (F - 32) x 5/9`C = (62.4 - 32) x 5/9``C = 16.89`°C The initial temperature of the sample is 16.89°C.Step 3: Add 34.1°C to the initial temperature of the sample to obtain the final temperature in Celsius. Final temperature in Celsius = 16.89 + 34.1``Final temperature in Celsius = 50.99`°CStep 4: Convert the final temperature in Celsius to Fahrenheit.
F = (C x 9/5) + 32`F
= (50.99 x 9/5) + 32`F
= 123.78`°F
Therefore, the final temperature of the sample in degrees Fahrenheit when the desired temperature increase has been achieved is `123.78°F.`
To know more about Fahrenheit visit
https://brainly.com/question/14128605
#SPJ11
Which statement describes the relationship between minerals and rocks?
Minerals and rocks are the same.
Aggregates of minerals form rocks.
Minerals determine the texture of a rock.
Most rocks are made of a single mineral type.
Answer:
the answer is b
Explanation:
Statement which best describes relationship between minerals and rocks is that aggregates of minerals form rocks.
What are minerals?
Minerals are defined as a chemical compound which has a well -defined composition and possesses a specific crystal structure.It occurs naturally in the pure form.
If a compound occurs naturally in different crystal structure then each structure is considered as a different mineral.The chemical composition of a mineral varies depending on the presence of small impurities which are present in small quantities.
Some minerals can have variable proportions of two or more chemical elements which occupy equivalent position in the crystal structure.It may also have variable composition which is split into separate species.
Physical properties of minerals include color,streak, luster,specific gravity and cleavage.
Learn more about minerals,here:
https://brainly.com/question/1333886
#SPJ6
A sonar emits a sound signal of frequency 40000Hz, towards the bottom of the sea.
This signal is reflected on the body of a submarine after a delay of 0.3 seconds.
Given: Speed of sound in water is 1500 m/s.
Calculate the period of this wave.
Answer:
0.000025s
Explanation:
Period it’s. : T(s)= 1/f(Hz)=1/40000Hz=0.000025s
The first law of thermodynamics states that energy can neither be created nor destroyed. If this is true then why are we always looking for new sources of energy? Use the 2nd law of thermodynamics to answer this question.
Answer:
The second law of thermodynamics states in an isolated system, the entropy (the amount of thermal energy that cannot be converted into mechanical work, also known as the amount of disorder) always increases, therefore, an isolated system always require an external input (new sources) of energy for there to be orderliness or for the available energy of the system to remain constant or increase
Explanation:
WILL MARK BRAINLIEST
Answer:
152,155 J
Explanation:
115,333 + 36,822 = 152,155J
I WILL MARK YOU THE BRAINLIEST NO LINKS AND IF YOU DONT UNDERSTAND THE QUESTION DONT ANSWER
Use the table. Is the metal you found gold? How do you know?
Answer:
Perform a simple test of the material in the pan to assess whether it is real gold. Raw gold appears brassy yellow and bright. If you think it is gold, place your hand between it and the sun to create shade over the gold. If it still appears bright in the pan, chances are that it is real gold.
Explanation:
Diane is training for a marathon and goes to the track (400 m) to run every morning.
If Diane runs around the track four times, what is her final displacement?
280 m
If Diane runs around the track 6 times, what is the distance she travels?
Una persona y su perro se encuentran inicialmente en reposo y paradas arriba de una caja que está apoyada sobre un piso rugoso. La masa total de la caja, la persona y la mascota es de 80 kg. El coeficiente de rozamiento cinético entre la caja y el piso vale 0,3. Cuando el perrito salta hacia el piso con una velocidad horizontal de 6,0 m/s, la caja y la persona se desplazan 1,0 m en sentido contrario. ¿Cuál es la masa de la mascota?
Answer:
La masa de la mascota es de 11,24 kg.
Explanation:
Dado que la masa total de = 80 kg
Tenemos
Fuerza de fricción = 80 kg × 9.81 × 0.3 = 235.44 N
La mascota salta horizontalmente con una velocidad, v, de 6.0 m / s para dar un movimiento de 1 m a la caja de masa y a la persona
Trabajo realizado por el salto de la mascota = (80 - m) × 9.81 × 0.3
La energía del movimiento del perro = 1/2 × m × v² = Trabajo realizado al saltar de la mascota
1/2 × m × 6² = (80 - m) × 9.81 × 0.3
20943 · m = 235440
m = 235440/20943 = 11,24 kg
A magnet can move in a coil of wire to produce electricity in which system?
A. Generator
B. Motor
C. Magnet
D. Transformer
Answer:
A. Generator
Explanation:
Hope this will help
Answer:
A. Generator
Explanation:
That is the correct answer
The vertical and horizontal ditance of the projectile will be equal if the angel of the progectile i
The vertical and horizontal distance of a projectile will be equal if the angle of projection is 45 degrees.
What angle the range of projectile equal?Any two angles with a 2:1 ratio when launched at the same speed will have the same range.This is due to the fact that the projectile will be equally influenced by the horizontal and vertical components of its velocity at a 45 degree angle. Consequently, the missile will cover the same amount of ground horizontally as it does vertically.The projectile will be more affected by either the horizontal or vertical component of its velocity for different projection angles, depending on the angle. The projectile will be predominantly impacted by the vertical component of its motion at an angle of 90 degrees (straight up), while the horizontal component of its motion will be most influential at an angle of 0 degrees (horizontal).To learn more about angle the range of projectile equal refers to:
brainly.com/question/28789119
#SPJ4
The sun doesn't set during what season and at what latitude?
Question 15 options:
winter and greater than 66°N
spring and 0°N
summer and greater than 66°N
fall and 23°N
Answer: summer and greater than 66°N
Explanation:
Summer is the most appropriate season in which the sun does not set. It is a typical situation for the Arctic Circle. It is the latitude in which the sun does not set in the day and typically during the month of July. The north of this circle is a period of sunshine which last for a period of about six months in the North Pole. Summer never rises in the winter solstice (December).
Distinguish between the terms strength, power, and endurance as they are used in weightlifting
Answer:
Yes
Explanation:
Because I know
Answer:
Strength is measured in terms of how much weight can be lifted no matter how much time is taken. Power is measured in terms of how much weight can be lifted in a specific time period. Endurance training is based on progressive repetition exercises. ""HOPE THIS HELP""
3,
V₁ =
I₁ =
R₁ = 2 [2]
VT= 34 [v]
IT =
RT
=
V₂ =
I₂ =
R₂ = 9 [2]
V3 =
I3 =
R3 = 3 [2]
=
First, we shall determine the equivalent of R₂ and R₃. Details below:
Resistor 2 (R₂) = 9 ΩResistor 3 (R₃) = 3 ΩEquivalent (R) = ?R = (R₂ × R₃) / (R₂ + R₃)
R = (9 × 3) / (9 + 3)
R = 2.25 Ω
Now, we shall determine the equivalent resistance, Rₜ for the circuit. Details below:
Resistor 1 (R₁) = 2 ΩEquivalent of R₂ and R₃ (R) = 2.25 ΩEquivalent resistance (Rₜ) = ?Rₜ = R₁ + R
Rₜ = 2 + 2.25
Equivalent resistance (Rₜ) = 4.25 Ω
How do i determine total current, Iₜ?The total current, Iₜ can be obtained as follow:
Equivalent resistance (Rₜ) = 4.25 ΩTotal voltage (Vₜ) = 34 VTotal current (Iₜ) = ?Current = Voltage / resistance
Iₜ = 34 / 4.25
Total current (Iₜ) = 8 A
How do i determine V₁, V₂, and V₃ ?Voltage in series connection are different.
V₁ is in series connection with the total voltage of V₂ and V₃. Thus, it's value can be obtained as follow:
Resistor 1 (R₁) = 2 ΩTotal current (Iₜ) = 8 AVotalge 1 (V₁) = ?V = IₜR₁
V₁ = 8 × 2
V₁ = 16 V
Voltage in parallel connection is the same through out the circuit.
Thus, V₂ and V₃ are in parallel connection. Thus we can obtain their value as follow:
Total current (Iₜ) = 8 AEquivalent of R₂ and R₃ (R) = 2.25 ΩVoltage V₂ = V₃ =?V₂ = V₃ = IₜR
V₂ = V₃ = 8 × 2.25
V₂ = V₃ = 18 V
How do i determine I₁?We can obtain I₁ as shown below:
Resistor 1 (R₁) = 2 ΩVoltage 1 (V₁) = 16 VCurrent 1 (I₁) = ?I₁ = V₁ / R₁
I₁ = 16 / 2
current 1 (I₁) = 8 A
How do i determine I₂?We can obtain I₂ as shown below:
Resistor 2 (R₂) = 9 ΩVoltage 2 (V₂) = 18 VCurrent 2 (I₂) = ?I₁ = V₂ / R₂
I₂ = 18 / 9
current 2 (I₂) = 2 A
How do i determine I₃?We can obtain I₃ as follow:
Resistor 3 (R₃) = 3 ΩVoltage 3 (I₃) = 18 VCurrent 3 (I₃) = ?I₃ = V₃ / R₃
I₃ = 18 / 3
current 3 (I₃) = 6 A
Learn more about resistance:
https://brainly.com/question/13691672
#SPJ1
what is acceleration
\(\boxed{\large{\bold{\blue{ANSWER~:) }}}}\)
\(\sf What \: is \: acceleration? \\ \\ \sf The \: rate \: of \: change \: of \: velocity \: of \: an \\ \sf object \: with \: respect \: to \: time \\ \sf is \: known \: as \: acceleration. \)
A physical change can be distinguished from a chemical change because during a physical change- A. the properties of the substance may change, but no new substances are produced B. the properties of the substance change for only a short time but will return to their original state. C. an entirely new substance with new properties forms as a result of the change D. a new substance is produced, but the new substance has properties identical to the original substance.
Answer:
a
Explanation:
yw
Answer:
Its B and C on edge
Explanation:
HELP ME Please!!!!!!
Select ALL that apply
Answer:
Increase the number of coils.
Explanation:
By increasing the number of coils we can increase the electromagnet.
Water at the Antarctica usually exits as ice, making it very difficult to use the water or conduct experiment requiring the water to be in liquid state. A coffee addicted physicist stationed at a research base requires about 0.8 kg of ice for his coffee on the hour. a. How much heat is required to convert 0.8 kg of ice at -35 "C into steam at 100 C7 b. Plot the temperature - energy graph for the processes in (a). 5] [5] c. The surface tension of water was determined in a laboratory by using the drop weight method. 100 drops were released from a burette the inner diameter of whose opening is 1.8 mm. The mass of the droplets was 3.78 g. 1. Determine the surface tension of the water and comparing it with the tabulated value, i. Calculate the relative error of the measurements: [6] [4]
Answer:
water or conduct experiment requiring the water to be in liquid state. A coffee
addicted physicist stationed at a research base requires about 0.8 kg of ice for
his coffee on the hour.
a. How much heat is required to convert 0.8 kg of ice at -35 °C into steam
at 100°C?
[5]
b. Plot the temperature - energy graph for the processes in (a). [5]
C. The surface tension of water was determined in a laboratory by using
the drop weight method. 100 drops were released from a burette the
inner diameter of whose opening is 1.8 mm. The mass of the droplets
was 3.78 g.
i. Determine the surface tension of the water and, comparing it
with the tabulated value,
161
ii. Calculate the relative error of the measurements.
create a scenario of an injured athlete with a brief history, observations, what could be found in the palpation, current status of range of motion, strength and possible diagnosis.
Scenario:
John is a 25-year-old athlete who participates in high-intensity sports such as basketball and soccer. During a recent soccer game, he experienced a sudden twist in his right knee while trying to change direction. He immediately felt a sharp pain in the knee and was unable to continue playing. John had a previous history of minor knee injuries but never experienced anything as severe as this.
Observations:
Upon examination, John is visibly in pain and favors his right leg. He has difficulty bearing weight on the injured leg and walks with a noticeable limp. Swelling is observed around the right knee, and the area appears slightly discolored. John describes the pain as a combination of sharp and throbbing sensations, localized around the inner side of the knee joint.
Palpation Findings:
Palpation of the knee reveals tenderness and increased warmth around the medial collateral ligament (MCL) area. There is also some localized swelling and a noticeable loss of stability in the joint. A popping sensation is reported by John at the time of injury.
Current Status of Range of Motion and Strength:
John experiences a limited range of motion in his right knee, particularly when attempting to fully extend or bend the joint. Flexion is painful and restricted. He also feels weakness in his right leg and struggles to perform simple tasks such as squatting or walking up stairs.
Possible Diagnosis:
Based on the history, observations, palpation findings, and current status, it is possible that John has suffered a medial collateral ligament (MCL) sprain or tear in his right knee. The twisting motion during the game may have caused excessive stress on the MCL, resulting in damage to the ligament. The pain, swelling, limited range of motion, and instability are consistent with MCL injury. Further diagnostic tests such as X-rays or an MRI may be necessary to confirm the diagnosis and determine the severity of the injury.
To learn more about high-intensity sports click here
https://brainly.com/question/10052351
#SPJ11
two light conducting balls each of mass 10 milligrams are suspended by silk threads 1 meter long from a common point, when equal charges are given to the balls, they repel each other to a distance of 20 cm. find out the charges on each ball.
An isosceles triangle with two sides of 100 cm and one of 20 cm is formed by the threads and the balls.
The electric charge particles that make up the electrostatic force behave as both an attracting and a repulsive force. It is additionally called Columb's force. Charles-Augustin de Coulomb, a French scientist, would be honored by having the Columb attraction bear his name. However, electrostatic force is one of the four fundamental forces of nature. The forces add up to zero.
F=kq2/d2 is horizontally oriented.
Straight down, the gravitational force is mg, and the thread's tension is T.
The horizontal tension balances the electrostatic field, whereas the vertical tension balances gravity.
An isosceles triangle with two sides of 100 cm and one of 20 cm is formed by the threads and the balls.
Learn more about electrostatic force here-
https://brainly.com/question/9774180
#SPJ9
kim holds a 2.0 kg air rifle loosely and fires a bullet of mass 1.0 g. the muzzle velocity of the bullet is 150 m/s. calculate the recoil speed of the rifle.
The recoil speed of the rifle is 0.075 m/s in the opposite direction to the direction of the bullet.
To calculate the recoil speed of the rifle, we can use the conservation of momentum principle. According to this principle, the total momentum of the system (bullet + rifle) is conserved before and after the firing of the bullet.
Initially, the total momentum of the system is zero because the rifle and bullet are at rest. After firing the bullet, the total momentum of the system is given by:
m1v1 + m2v2 = 0
where m1 and v1 are the mass and velocity of the bullet, and m2 and v2 are the mass and recoil velocity of the rifle, respectively.
Substituting the given values, we get:
(0.001 kg)(150 m/s) + (2.0 kg)(v2) = 0
Solving for v2, we get:
v2 = -(0.001 kg)(150 m/s) / (2.0 kg)
v2 = -0.075 m/s
Learn more about recoil speed of the rifle at: https://brainly.com/question/12794487
#SPJ11
The __weight_________ of the glass of water on the table is its force.
Answer: inertia
Explanation:
he glass of water has inertia — it will not move unless a big enough force acts on it. The force in this activity pulling on the glass of water is the friction between the tablecloth and the glass.
Remember that different colors have different wavelengths. Given this fact, why would coherent light need to be all one color?
Different wavelengths of light result in various color perceptions. Whereas violet is perceived by the shortest wavelengths, red is perceived by the longest ones.
How are wavelength and frequency defined?Frequency and wavelength are two important characteristics of a wave cycle. A further definition of "wavelength" is the distance between any two matching positions on adjacent waves. Frequency is another word for the number of waves that pass through a specific location in a specific amount of time.
Is the wavelength of light the same?The wavelength is the space between successive crests, whereas the frequency is the quantity of crests that impact the beach per second. The only distinction is that we do so when discussing light rather than water.
To know more about Wavelength visit:
brainly.com/question/31143857
#SPJ1
A car can travel 30.0 mi on one gallon of gas. How many km/L is this?
Answer
30 mi/gal * (1.61 km / mi ) / (3.78 L/gal) = 30 * .426 km/L = 12.8 km/L
4. Un móvil lleva una velocidad de 75 m/s, en dicho momento aplica los frenos durante tiempo de 15 segundos hasta detenerse. ¿cuál será la aceleración del frenado? ¿cuál es la distancia que recorre hasta detenerse?
Answer:
a = 5 m / s² and x = 562.5 m
Explanation:
Let's apply the kinematics relations
v = v₀ + at
v² = v₀² + 2a x
In this case, as the car stops, its final speed is zero (v = 0) and the acceleration must be opposite to the speed, that is, negative
0 = v₀ - a t
a = v₀ / t
let's calculate
a = 75/15
a = 5 m / s²
let's look for the distance
0 = v₀² - 2a x
x = v₀² / 2a
let's calculate
x = \(\frac{75^2}{2 \ 5 }\)
x = 562.5 m