What is a substance that is made up of a single kind of atom

What is the meaning of the saying "the power of a lens is 1 dioptre"

Which rock type can be formed by adding heat and pressure to any of the three types of rock? a. igneous rock b. no rock type forms this way. c. metamorphic rock d. sedimentary rock

What is the basic unit for length

When a wave enters a new medium, slows down, and bends, the wave undergoes A) Reflection B) Absorption C) Refraction D) Reduction

How much work is done when you push a crate horizontally with 130 N across a 11- m factory floor?

Lisa has three classes that each last 50 minutes qhat ia the total nuber of minutes of minutes of the three classe?

Which has a greater speed a heron hat travels 600m in 60 seconds or a duck that travels 60 m in 5 seconds? Explain

A machine shovel moves dirt at the rate of 1,100 pounds of dirt 1 foot in 1 second. How many horsepower is this?

Two descriptions about physical quantities are given below: Quantity A: It is a force. Quantity B: It changes when the object travels from Earth to Earth's moon. What quantities are these most likely describing? A.

How does the tilt of Earth's axis affect how the sun's rays strike Earth?