Steel is a mixture of iron and carbon. It can be separated into iron and carbon by melting it. What is steel?

A. A compound

B. An element

C. A molecule

D. An alloy

What's the mass of a bag of apples

A child is riding a bike and skids to a stop. what happens to their kinetic energy?

What does earth's plate mean

Definition of the rule E=mc^2

A barometer is an important tool for predicting how the weather is changing. What does a barometer measure?

An electron is located on the x axis at x0 = - 9.31*10-6 m. Find the magnitude and direction of the electric field at x = 9.39 * 10-6 m on the x axis due to this electron.

Earth attracts a person with a gravitational force of 7.0 * 102 newtons. What is the magnitude of the force with which the individual attracts Earth? 3.0 * 10² newtons 7.0 * 10² newtons 8.5 * 10² newtons 9.8 * 10² newtons

The productive cycle of a human is usually regulated by

Winston stands on the edge of a building's flat roof, 12 m above the ground, and throws a 147.0-g baseball straight down. the ball hits the ground at a speed of 18 m/s. what was the initial speed of the ball?

When is the zebra in motion when it is not moving