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A 100-g ball collides elastically with a 300-g ball that is at rest. If the 100g ball was traveling in the positive x-direction at 5.00m/s before collision, what are the velocities of the two balls after the collision?
A person with a mass of 78 kg is riding in an elevator that is accelerating upward at 170 m/s2. What is the person's apparent weight
After 1.86 days, the activity of a sample of an unknown type radioactive material has decreased to 88.8% of the initial activity
When it rains, water vapor in the air condenses into liquid water, and energy is released. (a) How much energy is released when 0.0285 m (1.12 inch) of rain falls over an area of 2.59×106 m2 (one square mile)? (b) If the average energy needed to h..
What are the displacement and velocity of the point on the cord. What is the magnitude of the acceleration of one of the liners toward the other because of their mutual gravitational attraction.
Starting from its nest, an eagle flies at constant speed for 4.0min due east, then 4.2min due north. How long is the eagle in the air
A 12-V battery causes a current of 0.80A through a resistor, How many joules of energy does the battery lose in a minute
A car drives west on 8th Street at a speed of 39.3 mph. How long (time) does it take the car come to a complete stop
A proton has a speed of 0.85c. FIRST Calculate the rest energy of the proton, Calculate the kinetic energy of the proton
A 4m long, 140g rope is fixed at one end while the other is tied to a light string. what is the frequency of the third harmonic
A canoe has a velocity of 0.54m/s southeast relative to the earth. The canoe is on a river that is flowing at 0.52m/s east relative to earth.
consider two blocks of wood, one having mass of 1 kg and the other having a mass of 2 kg. What is the net force of the bottom block
A lawn mower ( 25 kg ) is pushed downward with a force of 50 N at an angle of 60 degree with the horizontal distance of 5 m. what will the speed of lawnmower be after travelling 5 m
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