A car runs at a constant speed of 15m/s for 300sec and then accelerate uniformly to a speed of 25m/s over a period of 20sec. this speed is maintained for 300sec before the car is brought to rest with uniform deceleration in 30sec. Draw a velocity time graph to rep the journey described above. from the graph, find the
1. the acceleration when the velocity increases from 15m/s to 25m/s
2. the total distance traveled in the time described
3.the average speed over the time described

Water at room temperature of 20.0°c is poured into an aluminum cylinder which has graduation markings etched on the inside. the reading in the graduations is 300.0 cc. the cylinder with the water in it is then immersed in a constant temperature bath at a temperature of 100°c. what is the reading for the level of water on the graduations of the cylinder after the water and the cylinder reach thermal equilibrium with the bath? the volume coefficient of expansion of water is 2.07 x 10^-4 k-1, and the linear coefficient of expansion of aluminum is 23.0 x 10^-6 k-1. a) 305.0 cc b) 304.0 cc c) 303.5 cc d) 303.3 cc e) 304.5 cc

The speed of light in a material is 0.50 c. what is the critical angle of a light ray at the interface between the material and a vacuum?

How many times did thomas edison mess up the light bulb