A car engine uses the combustion of fuel to move a system of gears that move its wheels. not all of the fuel's energy is transferred to the wheels. which TWO options describe what happens to the rest of the energy? a. some energy is lost because it is transformed into chemical energy.
b. some energy is lost because it is transformed into potential energy.
c. some energy is lost because of the weight of the car.
d. some energy is lost because of the friction in the car's moving parts.
e. some energy is lost because of the heat produce by the engine.

Which types of electromagnetic waves have higher frequencies than the waves that make up ultraviolet light? check all that apply. radio waves infrared light microwaves gamma rays visible light x-rays

Arunner is jogging at a steady 3.6 km/hr. when the runner is 2.9 km from the finish line, a bird begins flying from the runner to the finish line at 14.4 km/hr (4 times as fast as the runner). when the bird reaches the finish line, it turns around and flies back to the runner. even though the bird is a dodo, we will assume that it occupies only one point in space, i.e., a zero-length bird. how far does the bird travel? (b) after this first encounter, the bird then turns around and flies from the runner back to the finish line, turns around again and flies back to the runner. the bird repeats the back and forth trips until the runner reaches the finish line. how far does the bird travel from the beginning? (i.e. include the distance traveled to the first encounter)

Aweight lifter raises a 1600 n barbell to a height of 2.0 meters. how much work was done? w = fd a) 30 joules b) 3000 joules c) 320 joules d) 3200 joules