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Two ants race across a table 66 cm long. One travels at4.42 cm/s and the other at 3cm/s. When the first one crosses thefinish line, how far behind is the second one? Answer in units ofcm.
An airplane traveling at half the speed of sound emits a sound of frequency 5.45 kHz. At what frequency does a stationary listener hear the sound
A boat carrying a load of bricks is floating in a canal lock. One of the crew members throws a brick overboard, and it sinks. Does the level of the water in the lock rise or fall
A ball on a porch rolls 60cm to the porch's edge, drops 40cm, continues rolling on the grass, and eventually stops 80cm from the porch's edge. What is the magnitude of ball's total displacement, in centimeters.
An electron moves in a circular path perpendicular to a magnetic field of magnitude 0.260 T. estimate the radius of the circular path
A nuclear power plant has a reactor that produces heat at the rate of 690 MW. This heat is used to produce 250 MW of mechanical power to drive an electrical generator. At what rate is heat discarded to the environment by this power plant? MW
An LCR circuit contains a resistor with R = 450 ? and a capacitor with C = 3,500 ?F. If the resonant frequency is 30 kHz, what is the value of the inductance
A uniform bridge is 100 m long and weighs 200 N. how much force does each end of the bridge have to support
A baseball is thrown horizontally off a cliff at 17 m/s. How far from the base of the cliff will the baseball hit the ground? The cliff is 81 m high
Assume that the earth is a uniform density spherical mass. (This assumption is not correct but we will use it for simplicity in working the problem.)
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
Use the work-energy theorem to solve each of these problems. Youcan use Newton's laws to check your answers. Neglect air resistancein all cases. A branch falls from the top of a96.0-m-tall redwood tree, startingfrom rest. How fast is it moving when ..
The hypotenuse of a right triangle measures 11.5. what are the lengths of the other two sides
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