Which can a drop of liquid mercury can be described as?

A. A pure substance and a compound

B. An impure substance that is reactive

C. An impure substance that is unreactive

D. Pure substance and an element

Projectile motion. If you double the velocity in the x direction but the height is constant, would the range double?

State and explain law of conservation of momentum with example

A wall clock has a second hand 22.0 cmcm long. For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of Fast car, flat curve. Part A What is the radial acceleration of the tip of this hand

Basim's robotics team builds a robot that travels at 9 m/s and can fire a tennis ball at a target. Which would result in a judge who is sitting beside the testing ground observing the tennis ball having a speed of 7 m/s?

In one circuit, the terminals are at 98V and 100V. In the second circuit, they are at 2V and 6V. Why does the 2V and 6V produce a stronger electric field?

Two electrons are 2.3nm apart. What is the force between two electrons?

3. In a demonstration learning activity, A. the teacher shows children how something works or how to complete an entire activity. B. each child shows and tells about a favorite toy. C.

A 0.12 kg paper airplane flies in a straight line at a speed of 1.3 m/s. How much kinetic energy does the airplane have?

Each atom is composed of electrons and positive material. The mass of the atom is evenly spread throughout the atom. Neutrons are located in the center of the atom. Positive charge occupies a very small volume in the atom.

A hot-air balloon is ascending at the rate of 14 m/s and is 84 m above the ground when a package is dropped over the side. (a) How long does the package take to reach the ground? (b) With what speed does it hit the ground?