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A second ball is thrown straight down from a position 5 m directly below the first ball. The initial velocity of the second ball is 2 m/s. How long after being thrown will the balls collide?
Four different planets with different masses are depicted below. A location about the planet is also indicated. Rank the four locations in increasing order of their acceleration of gravity value, b
Red was not going to let go easily, so she pulled on the handle with a force of 13 N. If the net force on the basket is straight up, at what angle was Red Riding Hood pulling?
Draw what happens to parallel light that enters two lenses such that the two lenses (both with positive focal lengths) are separated by the sum of their focal lengths (f1+f2).
Bob, who has a mass of 82 , can throw a 900 rock with a speed of 26. The distance through which his hand moves as he accelerates the rock forward from rest until he releases it is 1.1. What constant
If a car traveling at 56 km/h will skid 24 m when its brakes lock, how far will it skid if it is traveling at 120 km/h when its brakes lock? (This question is typical on some driver's license exams
Suppose a crate of mass 8.8 kg is placed on the plank in the figure below at a distance x = 4.5 m from the left end. If the plank has a mass of 12 kg, find the forces exerted by the two supports on th
Calculate the molar volume for 3-methylhexane at p=3000psia and T=60F given that the critical pressure and critical temperature for 3-methylhexcane are 408.1psia and 503.8F respectively. (Show all
Make a spacetiem diagram on which the time axis is marked in seconds and the space axis is marked in light-seconds. Assume you are floating weightlessly and therefore consider yourself at rest. a)
A magnetic field is perpendicular to a 0.060-m x 0.080-m rectangular coil of wire that has 120 turns. In a time of 0.040 s, an average emf of magnitude 1.4 V is induced in the coil. What is the mag
An astronaut's normal weight it 600 newtons. How much will she weigh while orbiting in a satellite at 12,000 kilometers [two earth radii] above the surface of Earth?
Two infinite wires 15 cm apart. the left-hand wire carries a current of 6 A into the paper. the right-hand wire carries a current of 6 A out of the paper. the permeability of free space 4pi x 10^-7
The total impedance of an RC circuit with a resistance of 200 Ω is 1060 Ω. If the frequency of the applied voltage is 20.0 Hz, what is the value of the capacitance in this circuit?
Consider the light from the object that reflects first from the plane mirror and then from the concave mirror. Find the location of the image that this light produces in the concave mirror. Specify
A 66g ice cube can slide without friction up and down a 34 degree slope. The ice cube is pressed against a spring at the bottom of the slope, compressing the spring 12cm . The spring constant is 26
A spacecraft is in a circular orbit about the moon, 1.65 x 105 m above its surface. The speed of the spacecraft is 1530 m/s, and the radius of the moon is 1.74 x 106 m.
A 3.30 kg birdfeeder hangs from the tip of a 1.00 m pole that sticks up from the ground at a 65.0° angle. What is the magnitude of the torque exerted on the pole by the birdfeeder? Treat the bo
Suppose the mirror is misaligned, so that the actual angle between the normal to the surface and due south is too large by 0.0040°. By how many meters (due east) will the reflected ray miss the
Two long, straight wires, one above the other, are seperated by a distance and are parallel to the . Let the be in the plane of the wires in the direction from the lower wire to the upper wire dire
On an exo-planet, a 70-kg astronaut steps on a scale and finds that the scale reads 246 N. A survival pack is dropped a distance 85 m to the ground.
when the pull on each rope is 400N in the directions indicated, the acceleration of the car is 0.1ms-2. what is the size of the frictional force acting on the car in the above situation?
In an experiment, the AC generator produces AC power from three sets of independent coils in the stator. That means that the sine wave is out of phase by 120 degrees for each set of coils. The powe
A person can survive a feet first of impact at the speed of about 12 m/s 27mi/h on concrete, 15m/s 34 mi/h on soil and 34,m/s 76 mi/h on water. Why the different valves for different surfaces?
A 25-? resistance is connected in series with a 30-mH inductance and a 12-µF capacitor and are connected to a 90-V (rms) ac. If the frequency of the ac source is 500 Hz, calculate
Find the maximum height above the ground reached by the shell. (c) How long does it take for the shell to reach the ground? (d) What is the speed of the shell at this time?