A 82.9-kg man is standing on a frictionless ice surface when he throws a 1.70-kg book horizontally at a speed of 13.0 m/s. With what speed does the man move across the ice as a result? Give your answer in m/s, and be sure to use three significant figures in your answer.

An infinitely long line of charge has linear charge density 5.00×10⁻¹² C/m . A proton (mass 1.67×10⁻²⁷ kg , charge e) is 14.5 cm from the line and moving directly toward the line at 2500 m/s .

Calculate the proton’s initial kinetic energy.

How close does the proton get to the line of charge?

Please show how you got the answer so that I understand. :)

Explain whether it makes a difference to the net flux of a system if the shape of the object that it encloses changes. Be sure to explain why.

9. A cue ball traveling at 0.65 m/s hits the stationary 8-ball, which moves off with a speed of 0.22 m/s at an angle of 40° relative to the cue ball's initial direction. Assuming that the balls have equal masses and the collision is inelastic, what will be the speed of the cue ball?

2. (a) Write down the Time Dependent Schr

An electroscope has a charge of −3.9 µC while your finger has a charge of 4.2 µC. You touch the electroscope with your finger and discover that the charges of your finger and the electroscope are now the same. In this process, electrons were transferred from the electroscope to your finger. How many electrons were transferred in order for your finger and the electroscope to have the same charge?

---I got 4.05 but this isn't right

Write a few lines about : (at least 200 word) Write about heat, temperature change, heat capacity, heat transfer methods, conduction (no formulas only relation), convection (no formulas only relation) and Radiation (no formulas only relation). At least give one to two examples of each change of heat transfer methods (conduction, convection and radiation)

(Please type it)

A block is at the base of of a ramp of angle 35°. The ramp is 5 m. if the block is initially given a velocity of 12 m/s up the ramp, how far from the ramp will the block land?

Q6.  a) You put a uniformly shaped bit of dielectric material in between the plates of a plate capacitor. When you do this, the charge on each plate remains unchanged.

How does this affect the difference in potential between the two plates?

(A) The potential difference increases.

(B) The potential difference is not affected.

(C) The potential difference decreases.

Explain your reasoning.

b) Consider the same configuration as above. How does the dielectric material affect the energy stored in the capacitor?

(A) The stored energy increases.

(B) The stored energy does not change.

(C) The stored energy decreases.

Explain your reasoning.

c) Again, same configuration. Will there be an electrostatic force on the dielectric material when you put it in between the plates, and if so - what is the direction of the force?

(A) No electrostatic force is affecting the object.

(B) The object is affected by a force that pulls the object towards the area between the plates.

(C) The object is affected by a force that forces it away from the area between the plates.

Explain your reasoning.

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Thank you in advance!

Water flowing through a garden hose of diameter 2.75 cm fills a 24.0-L bucket in 1.30 min.

(a) What is the speed of the water leaving the end of the hose?
m/s

(b) A nozzle is now attached to the end of the hose. If the nozzle diameter is one-third the diameter of the hose, what is the speed of the water leaving the nozzle?
m/s

A 45 turn, 2.9 cm diameter coil is inside a pulsed magnet that has been off for some time, so the magnet can cool down. The magnet is turned on, and the magnetic field increases as B(t) = B_max [1 − e^{−3.1 t} ], where t is in seconds and B_max = 31.9 T. The field is perpendicular to the plane of the coil. What is the magnitude of the EMF induced in the coil at t = 0.403 s after the magnet is turned on?

Question Physics: Electrostatic Force and Gravitational Force

A small piece of paper weighs 10ˆ-2 gm. The weight of earth is 10ˆ24 kg. The glass rod with a net charge of 10-6C is brought near the paper which gets stuck to the glass rod and one can lift the stuck paper against the gravitational pull of the earth. Compare the force due to gravity on piece of paper and electrostatic force between paper and glass rod.

As your bus rounds a flat curve at constant speed, a package with mass 0.300kg , suspended from the luggage compartment of the bus by a string 50.0cm long, is found to hang at rest relative to the bus, with the string making an angle of 30.0? with the vertical. In this position, the package is 40.0mfrom the center of curvature of the curve.

What is the speed of the bus?

A block with mass m1 = 8.7 kg is on an incline with an angle θ = 38° with respect to the horizontal. For the first question there is no friction, but for the rest of this problem the coefficients of friction are: μk = 0.34 and μs = 0.374.

1) When there is no friction, what is the magnitude of the acceleration of the block?

2) Now with friction, what is the magnitude of the acceleration of the block after it begins to slide down the plane?

3) To keep the mass from accelerating, a spring is attached. What is the minimum spring constant of the spring to keep the block from sliding if it extends x = 0.16 m from its unstretched length.

4) Now a new block with mass m₂ = 14.8 kg is attached to the first block. The new block is made of a different material and has a greater coefficient of static friction. What minimum value for the coefficient of static friction is needed between the new block and the plane to keep the system from accelerating?

Two 2.7 cmcm -diameter disks face each other, 2.2 mmmm apart. They are charged to ±15nC±15nC.

1.)What is the electric field strength between the disks?

2.)A proton is shot from the negative disk toward the positive disk. What launch speed must the proton have to just barely reach the positive disk?