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?

what is the relationship between slit width d and delta x distance?

explain how Galileo's observations of the phases of Venus was the "nail in the coffin" for geocentrism identifying what he observed to support his claims.

A photon moving in the +x-direction, scatters off a free stationary electron. The wavelength of the incident photon is 0.0330 nm. After the collision, the electron moves at an angle α below the +x-axis, while the photon moves at an angle θ = 73.3° above the +x-axis. (For the purpose of this exercise, assume that the electron is traveling slow enough that the non-relativistic relationship between momentum and velocity can be used.)

(a)

What is the angle α (in degrees)?

° counterclockwise from the +x-axis

(b)

Determine the speed of the electron (in m/s).

m/s

Two racing boats set out from the same dock and speed away at the same constant speed of 103 km/h for half an hour (0.500 h), the blue boat headed 26.8

Give examples of changes of energy from potential to kinetic and from kinetic to potential.

A permanent magnet is held directly below the center of a coil which is connected to a voltmeter. As you move the magnet closer towards the coil, the voltmeter reads negative. Which of the following statements is always true?

Moving the magnet farther away from the coil would produce a positive voltage reading instead.

Moving the magnet farther away from the coil would also produce a negative voltage reading.

The closer to the coil the magnet is held in place, the higher the magnitude of the voltage.

Turning the magnet clockwise about an axis perpendicular to the paper (such that "North" would increasingly point right) would produce a negative voltage readout.

Twisting the magnet clockwise about its long axis would produce a positive voltage readout.

Moving the magnet to the right would produce a negative voltage readout.

If you had turned the magnet around so that "South" would be on top, then moving it closer towards the coil would still produce a negative voltage readout.

The lob in tennis is an effective tactic when your opponent is near the net. It consists of lofting the ball over his head, forcing him to move quickly away from the net . Suppose that you loft the ball with an initial speed of 15.0 m/s at an angle of 50.0° the horizontal. At this instant your opponent is 10.0 m away from the ball. He begins moving away from you 0.21 s later, hoping to reach the ball and hit it back at the moment that it is 2.10 m above its launch point. With what minimum average speed must he move? (Ignore the fact that he can stretch, so that his racket can reach the ball before he does.)