A 20 kg mass is dropped from a tall rooftop and accelerates at 9.8 m/s2. What is the weight of the dropped object?

What form of nitrogen are most plants able to absorb

Which of the following is an example of homeostasis? O A. If you are sleepy, you can drink coffee to stay awake. O B. When you drink a lot of water, you urinate (pee) more than usual O C.

Does sound travel faster in a warm room or a cold room?

For a constant voltage, how is the resistance related to the current? A) resistance is inversely proportional to the current, so when the resistance doubles the current is cut in half B) Resistance is directly proportional to current, so when

Hooke's law. The distance d when a spring is stretched by a hanging objective varies directly as the weight w of the object. If the distance is 38 cm when the weight is 3 kg, what is the distance when the weight is 7 kg? ... ?

The metric system is now known as the international system of units. a. T b. F

Technician A says that torque-to-yield head bolts are special bolts that are reusable. Technician A says that main bearing clearance can be calculated by knowing the inner diameter of the main bearing and the outer diameter of the main journal.

Which condition describes an object having terminal velocity? a. gravity > air resistance b. gravity < air resistance c. gravity = air resistance

All objects that have mass have gravity, and gravity pulls objects toward each other. A pencil has mass, and so does your hand. Yet a pencil drops to the floor when you let go of it. Why doesn't the pencil stick to your hand instead?

The radius of a car wheel is 3 inches. how far will the car travel in 10 revolutions of the wheel?