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A car is traveling 80 km/hr in a school zone. A police car starts from rest just as the speeder passes it and accelerates at a constant rate of 8 km/hr·s. When does the police car catch the speeding car?
How far (in {rm nm}) does the electron move before reaching a turning point? Because of their larger mass, the protons remain fixed all through this interval of time.
An asteroid is discovered heading straight toward Earth at 14km/s. An international team manages to attach a giant rocket engine to the asteroid. The rocket fires for 10 {rm min}, after which asteroid is moving at 26^circ to its original path at a..
A 650 kg weather balloon is designed to lift a 4600 kg package. What volume should the balloon have after being inflated with helium 0 degrees Celsius and 1 atm pressure to lift the total load.
In extremely cold weather conditions where the inside thermostat is set to 27 C and the outside temperature is -20 C, your 1200 square ft house might lose heat through the walls at a rate of 4000 W. How much energy might you lose in one week?
If the police car accelerates uniformly at 3.00m/s^2 and overtakes the speeder after accelerating for 9.00 s, illustrate what was the speeder's speed?
Two trains and a bird Two trains, each having a speed of 23km/h, are headed at each other on the equal straight track. A bird that can fly 60km/h flies off the front of one train when they are 70 km apart and heads directly for the other train.
A particle with a charge of -1.5uC and a mass of 2.5x10-6 kg is released from rest at point A and accelerates toward point B, arriving there with a speed of 42 m/s. The only force acting on the particle is the electric force. (a) Which point is at..
How far from a point on the floor directly below the edge. Why is it a good idea to have your hand extended forward when you are getting ready to catch the fast moving baseball with your bare hand.
Four or five gram blocks of metal are sitting out in the sun and absorb the same amount of heat energy. Use the following specific heat capacity data to resolve which block will increase its temperature the most.
A 2.20 sound wave travels through a pregnant woman's abdomen and is reflected from the fetal heart wall of her unborn baby. The heart wall is moving toward sound receiver as heart beats. The reflected sound is after that mixed with the transmitted so..
The auditory canal, leading to the eardrum, is a closed pipe 2.8 cm long. Find out the approximate value (ignoring end correction) of the lowest resonance frequency.
The potential at location A is 376V. A positively charged particle is released there from rest and arrives at location B with a speed vB.
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