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A hot-air balloon is rising straight up with a speed of 2.78 m/s. A ballast bag is released from rest relative to the balloon when it is 2.15 m above the ground. How much time elapses before the ballast bag hits the ground?
William Tell is shooting at an apple that hangs on a tree. The apple is a horizontal distance of 20.0 m away and at a height of 4.00 m above the ground. what is the arrow's initial velocity
A car is initially 4.0km south of a gas station and is moving with a constant speed of 55km/h due north. How far are the vehicles from the gas station when they pass each other
A hollow, conducting sphere with an outer radius of 0.260m and an inner radius of 0.198m has a uniform surface charge density of +6.70×10^?6 C/m^2. What is the new charge density on the outside of the sphere
A 3000 kg truck traveling north at 30 km/h turns east and accelerates to 48 km/h. What is the change in the truck's kinetic energy
A 767 kg satellite is in a circular orbit about the Earth at a height above the Earth equal to the Earth's mean radius. Find the period of its revolution
One of the great difficulties in landing on Venus is dealing with the crushing pressure of the atmosphere, How much force would the lander have to withstand on the earth
The activity (decays per second) of a certain radionuclide is observed to decrease by 87.5% in 30 hours. What is the half life T(1/2) of the radionuclide
When you see a traffic light turn red, you apply the brakes until you come to a stop, what was your average velocity during braking
In a freight yard a train is being made up. An empty freight car, coasting at 10 m/s, With what speed does the combined mass start to move
A 1.00 uF capacitor is connected in parallel with a 2.00 uF capacitor. The 1.00 uF capacitor carries a charge of +10 uC on one plate, find the potential on the negative plate of the 1.00 uF capacitor
A tight uniform string with a length of 1.80m is tied down at both ends and placed under a tension of 100N/m. What is the mass of the string
a Dog Sit 1.5m from the center of a merry go round. The Merry Go Round is Set in Motion,The Dog tangential speed is 1.5m/s. What is The Dog's Centripetal acceleration
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