The data below are taken from a test of a petrol engine for a motor car.

power output 150

kW

fuel consumption 20 liters per hour

energy content of fuel 40

MJ per litre

Which expression will evaluate the efficiency of the engine?

As you catch a fast-moving fastball, why is it wise to move yourhand in the direction of the ball's motion? Explain in terms ofwork and energy.

True or False A scientific theory generally is accepted as false until it is proved?

What happens to the atoms or molecules of an object when an object is heated?

Seorang wanita yang mempunyai massa 50 kg meletakkan seluruh berat badannya pada salah satu hak sepatunya ketika berjalan diatas lantai kayu luas alas sepatunya 1 cm2. hitung tekanannya ketka berjalan di atas lantai? (g=9,8 m/s2)

When using a microscope, what position should the stage be in when you first start focusing on your specimen?

Electromagnetic waves with low frequencies have been used for long-distance underwater communication. These waves most likely belong to which of the following parts of the electromagnetic spectrum? A. gamma rays B. infrared waves C. radio waves D.

A bird sitting high in a tree is an example of an object with what type of energy

The height a ball bounces is less than the height of the previous bounce due to friction. The heights of the bounces form a geometric sequence. Suppose a ball is dropped from one meter and rebounds 95 % of the height of the previous bounce.

Five-gram samples of copper and aluminum are at room temperature. Both receive equal amounts of energy due to heat flow. The specific heat capacity of copper is 0.09 cal/g°C, and the specific heat capacity of aluminum is 0.22 cal/g°C.

A bullet travels at 870 m/s. How long will it take a bullets to go 1 m?