Which of the following elements is a metalloid?

a. copper

b. helium

C. phosphorus

d. germanium

A gas mixture contained in a cylinder and piston assembly. The gas mixture released 903 kJ in form of heat into its surroundings. The internal energy during this process decreased by 450 kJ. Calculate the work involved during this process.

A 2,300-kg truck is traveling down a highway at 32 m/s. What is the kinetic energy of the truck?

Explain gravitational assist

A student adds two numbers together. How can the student determine the number of significant figures in the answer? A student measures her height with a meter stick and finds that she is about 1.5 m tall.

A substance that cannot be broken down into simpler substances is called an A. atom B. element C. solution D. homogeneous mixture

Which of the following has more inertia: (a) a rubber ball and a stone of the same size? (b) a bicycle and a train? (c) a five-rupees coin and a one-rupee coin?

In a laboratory, you determine that the density of a certain solid is 5.23*10-6kg/mm3. Convert this density into kilograms per cubic meters.

List the solar objects in correct order from the Sun. Venus Earth Mercury Saturn Neptune Mars Jupiter Asteroid Belt The Sun Uranus

The power exerted by a muscle is the product of the force exerted and the velocity of contraction. The area of which of these shaded regions represents the power exerted while a weight is lifted at maximum speed?

How can you tell one element from another?