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A vehicle starts from rest and accelerates to 4.0 m/s2 for 5 seconds, then maintain that velocity for 10 second, and then decelerates at the rate of 2.0 m/s2 for 4 second. Determine what is the final speed of the vehicle?
Pulsed lasers used in science and medicine produce very short bursts of electromagnetic energy. If the laser light wavelength is 1062 nm, How many wavelengths are found within the laser pulse
An object of mass 3.0 kg and travelling at 2.0 m/s collides head-on with a 2.0 kg object travelling in the opposite direction at 3.0 m/s. Determine the velocity of each object after impact
A cosmic-ray proton is moving at such a speed that it can travel from the Moon to Earth in 1.5s. At what fraction of the speed of light is the proton moving
Two objects, A and B, are rubbed together. As a result, object A acquires an excess negative charge while object B becomes positively charged. In comparison to their masses before the charging process,
As a space craft approaches a planet, the rocket engines on it are fired to slow it down so it will go into orbit around the planet. how long must the engines be fired
If the pressure of the 1.2-cm3 volume is reduced to 3.0 × 10?11 Pa (an extremely good vacuum) while the temperature remains constant, how many moles of gas remain in the container
A train moving with a speed of 31.7 m/s sounds a 140 Hz horn. Assume the stationary observer sounds a horn that is identical to the one on the train. What frequency is heard from this horn by a passenger in the train?
Two point charges are on the y-axis. A 4.0 µC charge is located at y =1.05 cm, and a -2.06 µC charge is located at y =-1.70 cm. Find the total electric potential at the origin.
Susan's 10.0kg baby brother Paul sits on a mat. Susan pulls the mat across the floor using a rope that is angled 30° above the floor. The tension is a constant 32.0N and the coefficient of friction is 0.170. Use work and energy to find Paul's s..
A 3200-kg spacecraft is in a circular orbit 1800 km above the surface of Mars. How much work must the spacecraft engines perform to move the spacecraft to a circular orbit that is 2000 km abovethe surface?
A 9.5 kilogram monkey is hanging by one arm from a branch and is swinging on a vertical circle. Obtain the magnitude of the tension in the monkey's arm
q1. 0.55 kg block of ice is sliding through you on the very slippery floor at 3.6 ms. as it goes by you give it a kick
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