The first asteroid to be discovered was Ceres. It is the largest and most massive asteroid in our solar system’s asteroid belt, having an estimated mass of 3.0 x 1021 kg and an orbital speed of 17,900 m/s. Determine the amount of kinetic energy possessed by Ceres.

As plant engineer, Donna purchases an electrical motor which has an output of 1500. hp. If it requires 1.20 Megawatts of electricity, what is the efficiency of the motor?

What will be an ideal response?

The crustal surface and the uppermost part of the mantle is called the

A) asthenosphere. B) lithosphere. C) mohorovicic. D) centrosphere.

Which of the following general statements about light and Earth's atmosphere is not true?

A) Visible light from the Sun is absorbed in the exosphere. B) X-rays from the Sun are absorbed in the thermosphere. C) Ultraviolet from the Sun is absorbed primarily in the stratosphere. D) Infrared light emitted by Earth itself is absorbed primarily in the troposphere.

This diagram represents the life track of a 1 solar-mass star from its pre-main-sequence stages to just before its final death. Refer to the life stages labeled with roman numerals. During which stage is the star's energy supplied primarily by gravitational contraction?

A) Stage ii B) Stage iii C) Stage v D) Stage vi E) Stage viii