After the discovery of the electron, scientists knew that atoms must also have positively changed particles because?

A. Atoms have mass

B. Atoms have electrical charge

C. Atoms have neutral charge

Humans have nearly 80 different kinds of organs. Each organ serves a specialized purpose in the body. For example, the brain serves as the control center of the body.

It proved my hypothesis because whenever the sound got closer to the observe it would increase and whenever it passes him it would decrease

What property do liquids and gases share a) they change their shapes depending on their container b) they maintain their volumes c) they maintain their shapes d) they change their volumes depending on their container

A piano tuner stretches a steel piano wire with a tension of 800 N. The steel wire is 0.400 m long and has a mass of 3.00 g. What is the frequency of its fundamental mode of vibration?

Which best describes a difference between electric current and static electricity

Two copper wires with different diameters are joined end to end. If a current flows in the wire combination, what happens to electrons when they move from the larger-diameter wire into the smaller-diameter wire?

A baseball player is warming up and tosses a ball straight up into the air. The ball travels up until it reaches some maximum height, and then falls back down to the player/'s hand.

Volume can be measured in liters or cubic meters. a. T b. F

A spring with a spring constant of 1200 N/m has a 55-g ball at its end. The energy of the system is 5.5J. What is the amplitude of vibration?

Force F1 acts on a particle and does work W1. Force F2 acts simultaneously on the particle and does work W2. The speed of the particle does not change. Which one of the following must be true? a. W1 is zero, and W2 is positiveb. W1 = - W2c.