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A fast tortoise runs with a speed of 10.0 cm/s and a hare runs 20.0 times faster. They start a race together but the hare stops to rest for 2.00 minutes. The tortoise wins by 20.0 cm.
(a) How long (time) is the race?
(b) What distance did the hare cover?
A viewing window in the Atlanta aquarium is 55 inches wide and 46 inches high. what is the outward force on the window
His arm is 70 cm long and has a mass of 4.0 kg. Illustrate what is the magnitude of the torque about his shoulder if he holds his arm straight out to his side, parallel to the floor?
A soccer ball of mass 400g is rolling at a speed of 8m/s along a flat horizontal surface. Find the rotational kinetic energy of the ball
A motorist drives south at 30.0 m/s for 3.00 min, then turns west and travels at 25.0 m/s for 2.80 min, and finally travels northwest at 30.0 m/s for 1.00 min. For this 6.8 min trip, how do you find the total vector, average speed and average velo..
Consider a large truck carrying a heavy load, such as steel beams. A significant hazard for the driver is that the load may slide forward, Calculate the minimum stopping distance for which the load will not slide forward relative to the truck
A 110kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 350N. For the first 15.00 m the floor is frictionless and for next 15 m the coefficient of friction is 0.30. What is the final speed of the crate.
How much heat does it take to increase the temperature of 4.50 moles of a diatomic ideal gas through an amount 40 if the gas is held at constant volume? The gas molecules can translate and rotate but not vibrate.
Light from a helium-neon laser (wavelength=649 nm) passes through a circular aperture and is observed on a screen 2.36 m behind the aperture
a car traveling 85 km/hr strikes a tree. the front end of the car compresses and the driver comes to rest after traveling 0.8m. Determine the time it takes the car to stop
A 1000 kg roller coaster starts from rest at height H= 25 m above the bottom of a 14 m diameter loop. What is the downward force of the track on the car
A small glass bead has been charged to + 30{rm nC} . a)What is the magnitude of the acceleration of a proton that is 3.0{rm cm} from the center of the bead? b)What is the magnitude of the acceleration of an electron that is 3.0{rm cm} from the cen..
A power supply maintains a potential difference of 86.1 V across a 1070-? resistor. What is the current in the resistor
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