How may substance be tested to determine whether or not it is an element?

Determine the difference in blood pressure (mmHg) between the top of the head and bottom of the feet of a 1.72-m-tall person standing vertically? The density of blood is 1.06 * 103 kg/m3.

A steady flow of electrical charge is called: a potential a potential energy source an electric current a field

Why does friction reduce a machine's efficiency

If the total mass hanging on one end of the string that creates the tension in the string is 0.300 kg, what is the mass density (mass per unit length) μ of the string?

2. How many grams of water can be heated from 20.0°C to 75°C using 12500.0 Joules?

What is the most advanced life form on earth

Which EM wave is about the size of humans?

Describe how the Catapult works?

Newton's third law of motion states that the force pair acting on different objects consist of two forces that

While working on her science fair project Venus connected a battery to a circuit that contained a light bulb. Venus decided to change the light bulb to a higher resistance, but she wanted to keep the current the same.