What describes a basic principle of nature that always occurs under certain conditions.

45 m = how many cm?

A child carries a 3N book at a constant velocity of 4 meters across a horizontal floor. What is the net work done? a) 0 J b) 7 J c) 10 J d) 12 J

Which of the following is an acidic pH? A. 6.0 B. 7.0 C. 8.0 D. 9.0

What is pseudoscience? Pseudoscience is a branch of science that does not require scientific proof. a proven way to conduct science experiments. something that resembles science but cannot be considered science.

How is the pressure of a gas related to its concentration of particles? A) Pressure will expand a gas, enlarging its volume and reducing its density and concentration of particles.

A man paddles a canoe in a long, straight section of a river. The canoe moves downstream with constant speed 5 m/s relative to the water. The river has a steady current of 1 m/s relative to the bank. The man's hat falls into the river.

In an atom, almost all of the mass is concentrated in a tiny nucleus because

A truck travels down the highway at a speed of 110 km/hr. How long does the trip last if the truck covered 2200km?

Could tests be performed to support the clamim?

A carpenter is working on a house two blocks away. you notice a slight delay between seeing the carpenter's hammer hit the nail and hearing the blow. at what time does the event "hammer hits nail" occur?