Which of the following causes a current in an electrical circuit?

A. resistance

B. a current difference

C. a voltage difference

D. the shape of the electrical circuit

What three sources does the human body use to provide energy for moderate physical activities

The school cafeteria has become a major focus in nutrition over the years. Many states are passing a "no junk food" policy in school cafeterias and vending machines.

The fast French train known as the TGV (Train à Grande Vitesse) has a scheduled average speed of 216 km/h. (a) If the train goes around a curve at that speed and the acceleration experienced by the passengers is to be limited to 0.

The electron shell model is a simplified version of a more accurate model. Electrons really reside in the ... a. Atomic zone b. Electron zone c. Electrically-charged aura d. Electron cloud

Parallels are numbered from 0° to 90° east and from 0° to 90° west.

The potential difference between the terminal of an electrical heater is 60v when it draw a current 4A fron the source. What current will the heater draw if the potential difference is increased to 120v?

Which answer choice best explains why nuclear reactions release more energy than chemical reactions? Electrostatic forces of repulsion are thousands of times stronger than gravitational forces.

A train's mass is 18181.81 kg. What is its weight?

a 3.0m long frictionless pendulum swings with a maximum angluar displacement of 10 degree from the vertical. at its lowest position the kinetic energy of the pendulum is 20.0j what is the potential energy of the pendulum when the kientic energy is 5.

How are hypotheses and theories related to each other?