2. How much of the world's electricity currently comes from coal?

Select one:

a. 25%

b. 40%.

гоо оо.

с. 50%

d. 75%

What kind of motion is explained by particle theory

If the tube were filled with helium instead of air, how would your results change

The distriict record holding sprinter stars in the blocks and accelerates to 10/s in 20s what was the acceleration of the sprinter?

U-238, the common isotope of uranium, has 92 protons, 146 neutrons, and 92 electrons. U-235 is another isotope of uranium. How do the number of subatomic particles of U-238 and U-235 differ? A. U-238 has three more electrons than U-235. B.

How society has been benefited by the knowledge of physics

Compare the friction force on the cart when it is rolling along the blacktop parking lot to the friction force on the cart when it is inside the grocery store (assume the flooring is smooth vinyl tile).

Which of the following objects has the most kinetic energy? a car going 60 miles per hour a spring that is compressed a rock sitting on the edge of a cliff a bicycle going 10 miles per hour

Which type of environment results from an equal amount of solute and solvent in and out of the cell? A. hypertonic environment B. isotonic environment C. hypotonic environment D.

If a 75 W lightbulb operates at a voltage of 120 V, what is the current in the bulb?* A. 1.6A B. 9000 A C. 195 A D. 0.63 A

A resistor and a capacitor are connected in series across an ideal battery having a constant voltage across its terminals. Long after contact is made with the battery (a) the voltage across the capacitor is A) equal to the battery's terminal voltage.