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A pitcher threw a baseball straight up at 35.8 meters per second. What was the ball's velocity after 2.50? (Note that, although the baseball is still clibing gravity is accelerating it downward).
Two tiny, spherical water drops, with identical charges of -7.20 x 10-17 C, have a center-to-center separation of 1.4 centimeter. Find the magnitude of the electrostatic force acting between them
A hollow non-conductiong sphere has a uniform charge density ?. The inner and outer radius of the sphere are r1 and r2m respectively. What is the total charge of this sphere
A 1.20 kg mass on a horizontal spring oscillates on a frictionless surface with a displacement as a function of time given by x(t) = 0.075cos(4.16t – 2.45). (Units are standard units.) Find the time for one complete vibration. Find the force const..
A car moves in a flat, circular path of radius R on a surface with a coefficient of kinetic friction of 0.25 and a coefficient of static friction of 0.35. How long does it take the car to complete one orbit
Saturn has an equatorial radius of 6.00 * 10 ^7 m and a massof 5.67 * 10 ^26 kg. Compute the acceleration of gravity at the equator of Saturn
A 50g hard-boiled egg oscillates on a spring with force constant 25N/m. A damping force F=-bv acts on the egg. Calculate the magnitude of the damping constant b
A neodymium-glass laser emits short pulses of high-intensity electromagnetic waves. Find the average power of each pulse
Radio waves are diffracted by large objects such as buildings, whereas light is not noticeably diffracted by large objects such as buildings. Why is this?
A block of mass m and initial speed collides elastically with a block of mass 2m which is initially at rest. Assuming the positive direction is to the right and that there is no friction among the blocks and the surface, what is the velocity of the b..
An object is 15cm from the surface of a spherical Christmas tree ornament that is 20.0cm in diameter. What is the magnification and orientation of the image
a 2.0 meter long string that has a mass of 24.0 grams is under 45 n of tension. a sinusoidal wave with an amplitude
the blade of a windshield wiper moves through an arc of 90deg in a time of 0.40s. the tip of the blade moves on the arc
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