Which of the following items uses a wheel and an axle?

a) a bicycle

b) a wheel chair ramp

c) a pair of scissors

d) a shovel

Are most plants and animals single-cell organisms

Explain the relationship between electrons and protons in a positive ion

In a solid, the atoms are tightly locked in position and do not change position. True False

The major manufacturing companies in a small, less-developed country have decided to jointly build hospitals in rural areas in the country where they assemble their products.

When the two sides of a composition correspond to one another in size, shape, and placement of form, the work has?

When a brick is dropped from the roof of a house, it lands on the ground with a speed v. What will the speed at ground level be for an identical brick dropped from a roof twice as high as the first one?

The scientific method begins with recognizing a problem. The recognized problem in this scenario is, "Why is the printer in the office not working?" Choose the hypotheses that are testable and from which an experiment can be formed.

The correctly balanced equation for H2O2 → H2O + O2 is

How would an unbalanced chemical equation convey misleading information about what took place during a chemical reaction?

A car rounds a 75-m radius curve at a constant speed of 18 m/s. a ball is suspended by a string from the ceiling the car and moves with the car. the angle between the string and the vertical is: