Which substance has the least density? A. an iceberg B. a gallon of water C. a block of aluminum D. a small piece of lead

Garrett throws a large rock into a waveless pond. The impact of the rock hitting the water causes waves to travel along the pond's surface toward the shore.

The electric field in a particular thundercloud is 3.8 x 105 N/C. What is the acceleration (in m/s2) of an electron in this field? (Enter the magnitude.) m/s2

How are earthworms connected with soil fertility? A) They eat essential nutrients and reduce the fertility of the soil. B) They increase soil fertility by fixing nitrogen compounds in the soil.

What things affect gravity

4 An 80 kg skier stands at the top of a 40 meter slope. What is her gravitational potential energy before she skies down the slope? O 3200 O 31,360 19.63 O 15,680

If there are 20 Earthworms in a garden that covers 5 square meters, what is the population density of the earthworms? A. 20 Earthworms B. 4 C. 100 Earthworms per square meter D. 4 Earthworms per square meter

How are AC and DC generators different? In AC generators, commutators produce alternating current. In AC generators, no commutators or slip rings are used. In DC generators, slip rings produce direct current.

A 30.0-kg object experiences a drag force due to air resistance with a magnitude proportional to the square of its speed. The object falls with an acceleration of 4.00 m/s2 downward when it is falling downward at 70.0 m/s.

If a tank contains water 4 m deep, what is the pressure at the bottom of the tank? (Neglect the atmospheric pressure.)

Eli rolled a ball down the cement sidewalk as hard as he could. The ball rolled for less than a minute before it came to a stop. What force acted to slow and finally stop the ball? A.