12,815 Answered Questions for the topic physics

Physics

10/19/22

Please help me!
A novice skier, starting from rest, slides down a frictionless 13.0oincline whose vertical height is 150 m.  How fast is she going when she reaches the bottom?
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Physics

10/19/22

Please help me!
A spring has a spring constant of 82.0 N/m. How much must this spring be compressed to store 25.0 J of potential energy?
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Physics

10/19/22

Please help me!
Does the net work done on a particle depend on the choice of reference frame? Explain why or why not.
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Physics

10/19/22

Please help me!
A box of mass 4.0 kg is accelerated from rest by a force across a floor at a rate of 2.4 m/s2for 5.3 s. Find the net work done on the box. Express your answer using two significant figures.
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Physics

10/19/22

Please help me with this question!
How much work is done by the gravitational force when a 260 kg pile driver falls 2.30 m? Express your answer using three significant figures.
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Physics

10/19/22

Physics 2D Momentum
A 3520 kg truck moving north at 16.0 m/s makes an inelastic collision with a 1480 kg car moving 21.0 m/s east. What is the magnitude of their joint velocity after the collision?
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Physics

10/18/22

The amount of heat released when 1.5 grams of steam at 100 degrees Celsius is converted into liquid water at 100 degrees Celsius is ____ J.
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Physics Math

10/18/22

Physics and thanks for the help
What applied horizontal forces is required to accelerate a 10-kg body along a horizontal surface with the acceleration of 2 m/s^2 if the coefficient of kinetic friction is 0.3?
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Physics Math

10/18/22

Vector Subtraction

Let [A] = 4î − 5ĵ and [B] = −9î+ 6ĵ What is [C] = [A] − 3 [B)]? Give your answer as a magnitude and direciton.I'm able to get the magnitude, but whatever I find for the angle seems to be wrong.
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Physics

10/17/22

Uniform Circular Motion
Suppose a piece of dust is stuck to a CD such that it does not slip even when the CD is spinning.If the constant spin rate of the CD is 460 rpm, then what angular distance, in radians, is traveled... more
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10/17/22

, calculate the maximum error value and the number of bits to be transmitted per second
Assume that you have an analog signal with a maximum and minimum amplitude of +5 and -5 and a bandwidth of 1000 Hz. This signal is desired to be sampled in practice. If quantization level 256 is... more
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Physics

10/16/22

Question concerning V vs. T graph
I have a question concerning velocity vs time graphs. I am unsure when the velocity cuts off before it hits the x-axis and whether we should include the area underneath it. I had trouble explaining... more
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Physics Math

10/16/22

Please help with finding magnetic field between Currents.
Ther‎e are tw‎o lo‎ng, str‎aight, hori‎zontal wir‎es that are p‎arallel and at a di‎stance of 2a ap‎art. If bo‎th wir‎es ca‎rry a cu‎rrent I in the sam‎e directio‎n, (a) what is the m‎agnetic... more
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10/16/22

help needed with physics problem
20Ω ----------------------/\/\/\/\/\/\/\/\---------------------- | ... more
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10/16/22

Struggling with physics problem
A 30.0 μF capacitor initially charged to 30.0 μC is discharged through a 2.80 kΩ resistor. How long does it take to reduce the capacitor's charge to 15.0 μC?my answers, 0.37, 0.12, and 0.58 were... more
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Physics

10/15/22

Find the gauge pressure (in psi) at the bottom of a freshwater swimming pool that is 19.4 ft deep.
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Physics

10/15/22

An empty storage tank has a volume of 1,530 ft3. What is the buoyant force exerted on it by the air? (Assume the air is at 0°C and 1 atm.)
i couldnt solve the answer. i tried to follow the other answer's solving but it didnt come out can you give me the full answer?
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Physics

10/14/22

Help me asap plz
A motorcyclist initially traveling east at 15 meters per second, accelerates uniformly at a rate of 3 meters per second squared east to a velocity of 21 meters per second east. How far did the... more
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Physics

10/14/22

Distance and Displacement

A ship maneuvers 2500 m of islands 1800 m high mountain peak and fires a projectile at an enemy ship 610 m on the other side of the peak. The initial velocity of the projectile is 2500 and it is... more
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Physics

10/14/22

3 identical point charges of magnitude 6nC are placed at the 3 corners of a square 40mm on a side. What is the magnitude and direction of the electric field due to the 3 charges at the vacant corner.
Electric Fields in Physics
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Physics

10/14/22

A block of mass 2 kg has only two forces acting on it. physics & forces
A block of mass 2 kg has only two forces acting on it. One of those forces is directed south and has a magnitude of 9N. If the block accelerates toward the east at 6 m/s, determine the magnitude of... more
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Physics Mcat

10/14/22

inelastic collision
A massless spring (with force constant k = 183 N/m) connects a wall and a block of wood. The system is initially at rest, with the spring unstretched. The block has mass M = 51.7 g and is able to... more
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Physics

10/13/22

Physics chapter 1
On a day when the wind is blowing toward the south at 8 m/s, a runner jogs west at 6 m/s. What is the velocity (speed and direction) of the air relative to the runner?
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Physics Calculus

10/13/22

Work on an incline
   The diagram shows a crate with mass m=20.9kgm=20.9kg being pushed up an incline that makes an angle ϕ=24.7∘ϕ=24.7∘ with the horizontal. The pushing force is horizontal, with magnitude PP, and... more
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Physics

10/13/22

2D Kinematics Problem

Wile E. Coyote is in an Acme Rocket Sled traveling at a velocity of 100 m/s when he misses a turn and flies off a 46-meter high cliff. How fast does Wile crash into the ground. My question is how... more
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