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A 2.55 kg steel ball strikes a wall with a speed of 10.0 m/s at an angle of 60.0° with the surface. It bounces off with the same speed and angle. If the ball is in contact with the wall for 0.215 s, what is the average force exerted on the ball by the wall?
Consider two long straight parallel wires, each carrying 5 amps. These wires are 0.04 m apart. What is the magnitude of the magnetic field half way between these two wires
the driver of a train moving at 20 m/s applies the brakes when it passes an amber signal. Find the train's acceleration and its speed at the next signal
Calculate the probability of an electron in the ground state of the hydrogen atom being inside the region of the proton. (For purposes of calculation, use a proton radius r = 0.990e-15 m. Hint: Note that r
A proton has a charge of e= 1.6 x 10-19 C. Calculate the electic field produced by the proton 10 cm away. What is the magnitude of the electric potential at thesame position (10cm)?
One way to attack a satellite in Earth orbit is tolaunch a swarm of pellets in the same orbit as the satellite but inthe opposite direction. What is the kinetic energy of the pellet in the reference frame of the satellite just before the collision
A 0.0400 kg golf ball initially at rest is given aspeed of 35.0 m/s when a club strikes.If the club and ball are in contact for 2.00 ms, what average force acts on the ball
initially a yoga ball is partially blown up and its surface area measured. afterwards it is filled completely and its
There is evidence that elephants communicate via infrasound, Determine the intensity level of the infrasound 10 km from the source, assuming the sound energy radiates uniformly in all directions
a little boy standing at the cliff 500 m high. He throws a ball straight upward at an initial speed of 20 m/s squared. At a time of 6 seconds after it was thrown, how far above ground is i
What is the fraction of the hydrogen atom's mass (11H) that is in the nucleus? The mass of proton is 1.007276 u, and the mass of 11H atom is 1.007825 u.
A skateboarder shoots off a ramp with a velocity of 6.6 m/s,directed at an angle of 58° above the horizontal. The end ofthe ramp is 1.2 m above the ground. Let the x axis be parallel to the ground, the +y direction be vertically upward, and take a..
string under a tension of 50.5 N is used to whirl a rock in a horizontal circle of radius 2.55 m at a speed of 20.3 m/s on a frictionless surface, What is the breaking strength, in newtons, of the string
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