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A 142- baseball is dropped from a tree 12.0 above the ground. With what speed would it hit the ground if air resistance could be ignored? (solved this part: Answer= 15.3 m/s) --> If it actually hits the ground with a speed of 9.00 , what is the magnitude of the average force of air resistance exerted on it?
Which physical parameter, more than any other, most probably controlled the early evolution of the planetary system and dictated the characteristics of the planets that eventually formed?
When a beam of white light is incident (vertically) on a thin oil slick (n = 1.25) floating on water, What is the thickness of the oil slick
31.3 million excess electrons are inside a closed surface. what is the net electric flux through the surface
Suppose your body was able to use the chemical energy in gasoline. How far could you pedal a bicycle at 15 km/hr on the energy in 2.0 gal of gas? ( 1 gal of gas has a mass of 3.2 kg )
Two identical pucks are on an air table. Puck A has an initial velocity of 2.5 m/s in the positive x-direction. What is the speed and direction of puck B after the collision
an electric motor lifts an elevator car at the constant speed of 2 m/s. The power consumed by the motor to perform this task is 40000 W. what is the mass of the elevator
A compressed-air cylinder is known to fail if the pressue exceeds 100 atm. What is the pressure inside the cylinder during the fire
A puck (mass m1 = 2.50 kg) slides on a frictionless table. The puck is tied to a string that runs through a hole in the table and is attached to a mass m2 = 7.5 kg. What is the change in the kinetic energy of the puck
question1as thermonuclear fusion proceeds in its core the sun loses mass at a rate of 3.64 109 kgs. for the duration of
A skateboarder, starting from rest, rolls down a 12.5 m ramp. When she arrives at the bottom of the ramp her speed is 6.10 m/s. Determine the magnitude of her acceleration
What is atmospheric pressure on top of Mt. Everest on a day when water boils there at a temperature of 80.0°C
event a happeneds at the space time coordinate 1 lightsecond ls is the distance light moves in one secondta xayaza 4.5
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