When a muscle contracts, it performs work. It does this by A) converting chemical energy to mechanical energy. B) converting mechanical energy into heat energy. C) converting mass into energy. D) creating energy.

Compare and contrast formation of with the formation of mgcl2

Car A travels from New York to Miami at a speed of 25 m/s. Car B travels from New York to Chicago, also at a speed of 25 m/s. Are the velocities of the cars equal? Explain.

A musician playing a string instrument may use a finger to push a string tightly against the fingerboard of her instrument, thus shortening the length of the string. This causes the fundamental frequency to (a) increase, (b) decrease, (c) not change.

How many Oxygen (O) atoms are in the following? H2O + CO2 4 3 2

Although they seem to remain unchanged, many mountains undergo steady growth. if erosion and weathering and ignored, some mountains, like the San Gabriels in southern California grow as much as 1.0 cm within a year.

Imagine you are holding an apple. Does this apple have energy? how do you know?

Explain how inertia and the shape of a loop counteract the force of gravity to keep riders from falling out when a roller coaster goes through a loop traveling upside down

Which is not a characteristic of an ideal fluid? A. high viscosity B. laminar flow C. constant density D. constant pressure

What type of weather system brings calm, clear weather?

What is one reason supporting genetic modifications to food