How long does it take a 100 w motor to do 10 kilojoules of work

The closest object that can be photographed is 81.63mm and the magnification of this closest object is -0.404.

The focal length of a lens is determined when the lens is focused at infinity. It is obtained from the reciprocal of objects' distance and image distance. Magnification is the enlarged image that is formed over the object size.

From the given,

focal length (f) = 23.5mm

object's distance (u) = 33mm

imagen distance(v) =?

Focal length, (1/f) = 1/u + 1/v

1/v = 1/f - 1/u

    =1/23.5 - 1/33

1/v  = 12.2mm

v = 1/12.2 mm

  = 81.96mm

Thud, the image distance is v= 81.96mm.

Magnification (M) = -v/u

M = -33 / 81.96

  = - 0.402.

Thus, the magnification is -0.402.

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Answer:

a cold air mass and a warm air mass merge together

June 21-22 is the summer solstice in the Northern Hemisphere and the winter solstice in the Southern Hemisphere. On these days, the daylight hours are the longest at the North Pole and the shortest at the South Pole.

Using online tools or astronomical calculations, we can determine the length of daylight for each of the given latitudes:

90 degrees N latitude (North Pole): 24 hours of daylight (the sun does not set)

40 degrees S latitude: 9 hours and 39 minutes of daylight

40 degrees N latitude: 14 hours and 55 minutes of daylight

0 degrees latitude (equator): 12 hours of daylight (the sun rises at 6:00 am and sets at 6:00 pm)

Note that these values are approximate and may vary slightly depending on the exact location and year.

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A truck must have 8260N momentum when does a 3500 kg truck is traveling 2.36 m/s

The equation for momentum is

p = mv

Where:

p=momentum

m=mass of object in kg

v=velocity of object

By simply plugging in the numbers into the equation:

3500kg×2.36m/s

You get=8260 kgm/s

or

8260N

[Note that 1 Newton is equal to 1 kgms.]

A physical property called momentum defines how an item moves. It is a vector quantity, meaning it has both magnitude and direction, and is defined as the product of an object's mass and velocity.

The unit of measure for momentum is kilogram-meters per second (kg/s).

Kilograms are used to measure mass (kg)

The unit of velocity is metres per second (m/s).

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Newton first law state that anything in motion or rest will remain in motion or in rest until an external force is applied

Newton third law of motion state that every action have equal and opposite reaction

Answer:

Newton's laws of motion relate an object's motion to the forces acting on it. In the first law, an object will not change its motion unless a force acts on it. ... In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction.

Explanation:

mark me brain list please

Answer:

1) False, since constant speed means constant velocity, but with constant direction as well. Velocity is speed with direction. When you move in a circle, there are boundaries which means that a constant moving speed will cause the object to veer(move in different directions) to maintain movement, If it doesn't veer, the object will deflect(rebound) off the surface due to friction, and impact force or depending on its physical bond of malleability or density.

2a) Create position vectors by drawing a ray from the center(origin) of the circle to each of your desired points, it's magnitude will be the radius(how convenient). Both of these vectors go from the center of the circle to the position on the circle. In general, the distance from the origin to a point is called the radius vector.

2b)

Answer:

a. 86.80 m

b. i. The mass of the bob

ii. The length of the pendulum

Explanation:

a. Determine the height of the smokestack.

Using T = 2π√(L/g) where T = period of pendulum = 18.7 s, L = length of pendulum = height of smokestack and g = acceleration due to gravity = 9.8 m/s².

So, making L subject of the formula, we have

T = 2π√(L/g)

T/2π = √(L/g)

squaring both sides, we have

(T/2π)² = L/g

L = (T/2π)²g

Substituting the values of the variables into the equation, we have

L = (T/2π)²g

L = (18.7 s/2π)²(9.8 m/s²)

L = (2.976 s)²(9.8 m/s²)

L = 8.857 s² × 9.8 m/s²

L = 86.796 m

L ≅ 86.80 m

b. What factors influence the period of a simple pendulum

The factors that influence the period of a simple pendulum are

i. The mass of the bob

ii. The length of the pendulum

He throws a baseball 59 m to brandon at second base, creating a 30 degree angle east of south. brandon then turns and throws baseball 55 m east to first base the displacement  of the baseball is S = 89.75m

The following equation represents the ball's vertical velocity:

v2 = u₂- sinα2gh

The vertical component of the velocity vector at time t is denoted by v2.

u2 = initial velocity.

α = throwing angle.

-10 m/s2 if you consider the upward direction to be positive) is the acceleration caused by gravity.

t = time.

The ball's vertical velocity is zero when it reaches the highest point along its path. In order to find the initial velocity, we can use the equation for vertical velocity:

v2 = u₂- sinα2gh

0= u₂×sin(30°) 2 ×10m/s²×55

1100 sin(30°) = u2

1100/2 = u2

550 = u2

u = 23.4 m/s

At 23.4 m/s, the ball flies out of your grasp.

t = d/s

= 59/23.4

= 2.5 sec

Displacement

S = ut + 1/2 gt2

= 23.4×2.5 + 5×6.25

= 58.5 + 31.25

= 89.75 m

S = 89.75 m

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Answer:

sorry don't know i just need points

Explanation:

By convention, current is in the direction that (a) positive charges move.

Current is the flow of electric charge in a circuit. It is the rate of flow of charged particles, such as electrons, through a conductor. Current has a direction, and by convention, the direction of current is taken as the direction of the flow of positive charges.

However, it is the negatively charged electrons that actually flow through a circuit, and hence, the actual direction of current is opposite to the direction of the flow of electrons. Therefore, current is said to flow from the negative terminal of a battery to the positive terminal, even though the electrons are flowing in the opposite direction.

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The second projectile was 2 times faster than the first projectile, as its initial velocity was twice that of the first projectile.

Let's assume that the first projectile had an initial velocity of v1, and the second projectile had an initial velocity of v2.

m1v1 = (m1 + m2)v2,

v1 = 2v2

This means that the initial velocity of the second projectile was twice that of the first projectile.

To find out the maximum height reached by the second projectile, we can use the conservation of energy:

1/2 m1 v2^2 = (m1 + m2)gh

h' = 2h = 5.2 cm

Substituting the values in the equation, we get:

1/2 m1 v2^2 = (m1 + m2)gh'

Simplifying, we get:

v2^2 = 2gh'

Substituting the values, we get:

v2^2 = 2 x 9.81 x 0.052

v2 = 0.725 m/s.

A projectile is an object that is propelled through the air and follows a curved trajectory under the influence of gravity. Examples of projectiles include bullets, cannonballs, and rockets. A projectile is typically launched with an initial velocity and then moves through the air under the influence of gravity alone.

The trajectory of a projectile is determined by its initial velocity, angle of launch, and the force of gravity. As the projectile travels through the air, it experiences a downward force due to gravity, which causes it to follow a curved path called a parabola. The maximum height of the projectile occurs at the apex of the parabolic path, where the vertical component of the velocity is zero.

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The speed of the 2.86 g marble after the collision is 1.05 m/s.

We can use the conservation of momentum to solve this problem:

Before the collision:

m1 = 6.63 g = 0.00663 kg (mass of the first marble)

v1 = 1.41 m/s (velocity of the first marble)

m2 = 2.86 g = 0.00286 kg (mass of the second marble)

v2 = 0 m/s (initial velocity of the second marble)

After the collision:

v1' = 0.86 m/s (final velocity of the first marble)

v2' = ? (final velocity of the second marble)

Using conservation of momentum:

\(m1v1 + m2v2 = m1v1' + m2v2'\)

Substituting the known values:

\(0.00663 kg * 1.41 m/s + 0.00286 kg * 0 m/s = 0.00663 kg * 0.86 m/s + 0.00286 kg * v2'\)

Solving for v2':

\(v2' = (0.00663 kg * 1.41 m/s - 0.00663 kg * 0.86 m/s) / 0.00286 kgv2' = 1.05 m/s\)

Therefore, the speed of the 2.86 g marble after the collision is 1.05 m/s.

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The more  a star has, the shorter its main sequence life. "The mass-luminosity relation, which is used to describe the relationship between a star's mass and its luminosity, tells us that the more massive a star is, the brighter it is.

However, the mass of a star also determines how long it spends on the main sequence. A star spends most of its life in the main sequence, a stage during which it fuses hydrogen in its core to produce helium. The amount of time a star spends on the main sequence is determined by its mass, with more massive stars having shorter lifetimes than less mass stars.

As a result, the more massive a star is, the shorter its main speed life, which means that option D, "the more mass a star has, the shorter its main sequence life," is the correct answer. The other options, "all stars have the same ages," "all stars have equal life spans," and "none of the above," are all incorrect because they do not accurately describe the relationship between a star's mass and its main sequence lifetime.

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Answer:

C

Explanation:

Because when they clump together they bind. Get it?

Answer:

I'm thinking C) They are found in clumps called clusters and superclusters.

Explanation:

Galaxies with stronger gravity cause others to get close to them which means they created clusters

Answer:

Neil Armstrong was the astronaut

The speed of the motorcycle is  9.02777m/s in 7.2 sec.

The rate at which an object's velocity with respect to time changes is referred to as acceleration in mechanics. They are vector quantities, accelerations. The direction of the net force acting on an object determines the direction of its acceleration.

v(0) = 5.8

s(0)=0

s(7.2) = 65

s(t) =at^2/2 + v(0)t

s(7.2) = a(7.2)^2 + 5.8(7.2) = 65

a = (65-41.76)/51.84

a= 23.24/51.84 = about 0.4483 m/s²

v(t) = s'(t) = at +v(0) = at +5.8

v(7.2) = 0.4483(7.2) + 5.8

= 9.02777

velocity in 7.2 seconds is about 9.03 meters per second

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Answer:

forever alone uwu......

Let's see

Find enclosed area of loop

\(\\ \rm\dashrightarrow \pi r^2\)

\(\\ \rm\dashrightarrow 3.14(0.04)^2\)

\(\\ \rm\dashrightarrow 0.005m^2\)

Now

\(\\ \rm\dashrightarrow \phi=BAcos\theta\)

\(\\ \rm\dashrightarrow 9.59\times 10^{-7}=B(0.005)cos75\)

\(\\ \rm\dashrightarrow 9.59\times 10^{-7}=0.0046B\)

\(\\ \rm\dashrightarrow B=2084.78\times 10^{-7}\)

\(\\ \rm\dashrightarrow B=2.08\times 10^{-4}T\)

\(\\ \rm\dashrightarrow B=0.208mT\)

Answer:7.37*10^-4

Explanation:B=Ф/A*cos(θ) B=9.59*10^7/(π*0.0400²)*cos(75)=7.37144316*10^-4 =7.37*10^-4

(a) The rate of change of the potential at P(5,2,6) in the direction of the vector v=i+j−k is (32/√3) in MPa, (b) V changes most rapidly at P in the direction of the gradient vector (∇V) = (24, -2, 10), (c) The maximum rate of change at P is 26.08 in MPa.

(a) Find the rate of change of the potential at point P(5, 2, 6) in the direction of the vector v = i + j - k, we can calculate the dot product between the gradient of the potential and the unit vector in the direction of v.

The gradient of the potential V(x, y, z) is given by ∇V = (∂V/∂x)i + (∂V/∂y)j + (∂V/∂z)k.

Taking partial derivatives of V with respect to x, y, and z:

∂V/∂x = 4x - 4y + yz

∂V/∂y = -4x + 3z

∂V/∂z = xy

Evaluating the partial derivatives at P(5, 2, 6):

∂V/∂x = 4(5) - 4(2) + (2)(6) = 24

∂V/∂y = -4(5) + 3(6) = -2

∂V/∂z = (5)(2) = 10

Now, we can calculate the rate of change at P in the direction of v:

Rate of change = ∇V · (v/|v|)

|v| = √(1^2 + 1^2 + (-1)^2) = √3

Rate of change = (24, -2, 10) · (1/√3, 1/√3, -1/√3)

Rate of change = (24/√3) + (-2/√3) + (10/√3) = (32/√3)

Therefore, the rate of change of the potential at P in the direction of the vector v = i + j - k is (32/√3).

(b) Determine the direction of the maximum change of V at P, we need to find the direction of the gradient ∇V at that point. The gradient vector points in the direction of the steepest increase in the potential.

∇V = (24, -2, 10)

Thus, the direction of maximum change of V at P is (24, -2, 10).

(c) The maximum rate of change at P corresponds to the magnitude of the gradient vector ∇V.

Maximum rate of change = |∇V| = √(24^2 + (-2)^2 + 10^2) = √(576 + 4 + 100) = √680 ≈ 26.08.

The maximum rate of change at P is approximately 26.08.

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Answer: its motion  

Explanation: Potential energy is stored energy when an object is without motion, kinetic energy is the energy when a object is in motion.

Answer:

motion

Explanation:

edge 2021 btw miraculous is a great show :)

Answer:

A. Constructive

B. Destructive

C. Destructive

D. Constructive

Explanation:

Constructive interference takes place at locations along the path of two superposed waves where the waves are in phase such that a high or low point of one of the waves corresponds with a high or low point of the other wave which gives a resulting wave amplitude which is the sum of the amplitudes of the individual waves

Destructive interference takes place at locations along the path of two superposed waves where one wave is out of phase with the other wave such that a high or low point of one of the waves coincides with a low or high point of the other wave respectively thereby cancelling the effect of the other wave and giving a resulting wave that has an amplitude which is the difference in the amplitudes of the individual waves

Therefore;

At point A, the peak of each wave partially coincides resulting in constructive interference

At point B, the peak of the blue wave and the trough of the red wave partially coincides resulting in destructive interference

At point C, the through of the blue wave and the peak of the back wave partially coincides resulting in destructive interference

At point D, the trough of each wave partially coincides resulting in constructive interference.

Answer:

Thermal energy is an example of kinetic energy, as it is due to the motion of particles, with motion being the key. Thermal energy results in an object or a system having a temperature that can be measured. Thermal energy can be transferred from one object or system to another in the form of heat.

Explanation:

Answer:

Thermal energy is an example of kinetic energy, as it is due to the motion of particles, with motion being the key. Thermal energy results in an object or a system having a temperature that can be measured. Thermal energy can be transferred from one object or system to another in the form of heat.

Explanation:

The human capacity for storing long-term memories is A) essentially limitless.

The human capacity for storing long-term memories is generally considered to be essentially limitless. Unlike short-term memory, which has limited capacity and duration, long-term memory has the potential to store an enormous amount of information for extended periods.

Research suggests that the brain has an incredible capacity to form and store memories, and this capacity is not fixed or finite. The exact capacity of long-term memory is difficult to quantify precisely, as it can vary greatly among individuals and is influenced by various factors such as age, cognitive abilities, and expertise in specific domains.

While it is true that short-term memory has a limited capacity, long-term memory has the ability to store a vast amount of information over a lifetime. Studies have shown that individuals can retain an extensive range of memories, including personal experiences, factual knowledge, and learned skills, without any predetermined upper limit on storage capacity.

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Answer:

Explanation:

average speed = 90 km / hr

Let the total distance be 2 d .

time required to cover the time = 2 d / 90

time taken   to cover distance d at 50 km /h = d / 50

time required to cover the  nd half = 2 d / 90 -  d / 50

.02222 d  - .02 d = .002222 d

speed required = d/2 / .002222d

1 / 2 x .002222

= 225 km /h .

The statement that is true about an orbit with an eccentricity of almost 1 is:

C) The orbit is a very long and narrow ellipse.

The eccentricity of an orbit is a measure of how elongated or stretched out the shape of the orbit is. The eccentricity of an orbit ranges from 0 to 1, with 0 representing a perfectly circular orbit and 1 representing a highly elongated or eccentric orbit.

When the eccentricity is almost 1, it indicates that the orbit is highly elongated or stretched out. This means that the orbit is no longer close to being circular but takes on the form of a long and narrow ellipse. The closer the eccentricity is to 1, the more elongated the orbit becomes. Therefore, option C, stating that the orbit is a very long and narrow ellipse, is the correct statement for an orbit with an eccentricity of almost 1.

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The graph of the relationship between amplitude and decibel level of sound is not a linear graph but a logarithmic graph.

It is known as the Sound Intensity Level graph, where the amplitude of the sound is plotted on the x-axis, and the decibel level of sound is plotted on the y-axis.

As the amplitude of the sound increases, the decibel level increases as well. The relationship is not directly proportional, as a small change in amplitude can result in a significant change in decibel level. For example, a sound with an amplitude of 1 Pa has a decibel level of 0 dB, whereas a sound with an amplitude of 10 Pa has a decibel level of 20 dB. This indicates that the decibel level is increasing exponentially with the increase in amplitude.

Moreover, the graph shows that the human ear has a limited range of hearing, which is between 0 dB and 140 dB. Beyond this range, sounds become too loud to hear or can cause damage to the ear. Therefore, it is important to monitor the decibel level of sound to protect our hearing.

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In this scenario, we have two charged spherical conductors connected by a long conducting wire. The larger sphere represents the body of the airplane, while the smaller sphere represents the tip of the needle. We need to determine the electric potential and electric field at the surface of each sphere.

(a) To calculate the electric potential of each sphere, we can use the formula \(V = k * Q / r\), where V is the electric potential, k is the electrostatic constant, Q is the charge on the sphere, and r is the radius of the sphere. We can calculate the electric potential for each sphere using their respective radii:

The electric potential of the larger sphere (r = 6.00 cm):

\(V_{larger = k * Q / r_{larger\)

The electric potential of the smaller sphere (r = 2.00 cm):

\(V_{smaller = k * Q / r_{smaller\)

(b) The electric field at the surface of each sphere can be determined by dividing the electric potential by the radius of the sphere. The electric field at the surface is given by E = V / r. We can calculate the electric field for each sphere using their respective radii:

The electric field at the surface of the larger sphere (r = 6.00 cm):

\(E_{larger = V_{larger / r_{larger\)

The electric field at the surface of the smaller sphere (r = 2.00 cm):

\(E_{smaller = V_{smaller / r_{smaller\)

By applying these formulas, we can calculate the electric potential and electric field at the surface of each sphere in the given scenario.

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