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A tennis player hits a 1.45 kg tennis ball with a racket of mass 2.5 kg. If he hits the ball with a velocity of 7.5 m/s and then stops, what impulse did he imply on the ball? What is the ball %u2019s velocity.
A piece of Nichrome wire has a radius of 5.0 x10-4 m. It is used in a laboratory to make a heater that dissipates 2.00 x10^2 W of power when connected to a voltage source of 120 V. Ignoring the effect of temperature on resistance, estimate the req..
A fifteen-watt heater is used to heat a monatomic ideal gas at a constant pressure of 6.61 x 105 Pa. How long was the heater on
What is the maximum reaction time. A 1.52 wide, 1.50 high, 1500 car hits a very slick patch of ice while going 21.0 .If friction is neglected, how long will it take until the car's speed drops to 14.
A voltage ?v = (110 V) sin ?t (in SI units) is applied across a series combination of a 1.92 H inductor, a 12.5 µF capacitor, and a 12.8 O resistor. Calculate the power at that frequency
Moonlight is primarily reflected sunlight. If the moon reflects 15% of the photons that strike its surface, and we know that the intensity of sunlight at earth is I, what is the intensity of moonlight at the Earth during a full moon
Kinetic energy KE has dimensions kg · m^2/s^2. It can be written in terms of the momentum p and mass m as KE=p^2/2m. (a) Determine the proper units for momentum using dimensional analysis. (Use the following as necessary: kg, m, and s.)
An astronaut of 100 kg (including space suite) is conducting a apcewalk and exerts a force of 40 N on a 10000 kg spacecraft. What force is exerted on the astronaut by the spacecraft
A 3.1 kg block slides down a frictionless ramp, as shown in the figure. The top of the ramp is 1.6 m above the ground; What is the speed of the block when it leaves the ramp
A hydrogen atom in the ground state absorbs a 13.06eV photon. find the wavelength of the photon emitted in this quantum jump
a hiker determines the length of a lake by listening for the echo of her shout reflected by a cliff at the far end of the lake. estimate the length of the lake
A 370 kg rocket sled can be accelerated at a constant rate from rest to 1200 km/h in 2.0 s. What is the magnitude of the required net force
A racetrack has the shape of an inverted cone. On this surface the cars race in circles that are parallel to the ground, at what value of the distance d should a driver locate his car
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