When is a model used in science?

A) to demonstrate something that would otherwise be too complex to study in real life

B) to demonstrate something that is too large or too small in real life

C) both of the above

A child sleds down a frictionless hill with vertical drop h. At the bottom is a level stretch where the coefficient of friction is 0.27. If she slides 19 m across the level stretch, what's h? Express your answer with the appropriate units.

Resistance training is sometimes called what training

Based on Archimedes' principle, we know that if an object displaces a given weight of water, then the object is being buoyed up by an equal amount of force. true or false?

3. A car is traveling with a velocity of 40 m/s and has a mass of 1120 kg. The car has Calculate it. energy.

Find the velocity in miles per hour of a marathon runner who runs 26 miles north 2.5 hours

Which group of hominids lived at the same time as Homo sapiens? a. australopithecines c. Homo habilis b. Homo erectus d. Neandertals

Which statements describe properties of stars check all that apply

Like magnetic poles will repel each other, while opposite magnetic poles will attract each other true or false

Why are newtons second and third law important to everyday life?

Which of these factors will increase the speed of a sound wave in the air