What essential characteristic does a good experiment have? a. a control group is given the experimental treatment. b. a single variable is tested. c. a control is used. d. both b and c

6) Mechanical (sound) waves are unable to travel through a vocuurn, such os through space, but r from satelites How is this possible?

Why do disk stars bob up and down as they orbit the galaxy? because the gravitational pull of other disk stars always pulls them toward the disk because of friction with the interstellar medium because the halo stars keep knocking them back into the

Two lamps one rated 40W at 220 V and the other 60W at 220 V are connected in parallel to the electric supply at 220V.

Consider two positively charged particles, one of charge q0 (particle 0) fixed at the origin, and another of charge q1 (particle 1) fixed on the y-axis at (0, d1,0). What is the net force F⃗ on particle 0 due to particle 1?

The best evidence of Earths rotation is provided by

How much time does it take light to travel from the moon to the earth

What type of rock would you expect to form from the material found along a beach?

A motorist driving at 25 meters/second decelerates to 15 meters/second. The combined mass of the vehicle and the driver is 1.5 * 10³ kilograms. What is the amount of mechanical work done by the vehicle?

All forces are different each exerts a particular type of effect on an object

Witch statement about polymers is true