Which of the following level of organization is smaller than the cell?

The nervous system

Organs

Tissues

Atoms

A 72 kg sled is pulled forward from rest by a snowmobile and accelerates at 2.0m/s^2 (forward) for 5.0 seconds. The force of friction acting on sled is 120 N (backwards). The total mass of a snowmobile and driver is 450 kg.

According to the uncertainty principle, if the position of a moving particle is known, what other quantity cannot be known?

Parallel conducting wires carrying currents in the same direction repel each other. a. True b. False

Justin Bieber is thrown horizontally at 10.0 m/s from the top of a cliff 122.5 m high. How long does it take to reach the ground? What is the horizontal displacement? What is Justin's final velocity?

What are all things made of: a) atoms b) elements c) air

A girl that has a mass of 55kg is standing on a floor, how much supporting force does the floor have?

What amount of temperature do you need to make a metamorphic rock?

What is the current hypothesis on how the Earth was formed?

a 7.3kg gallon paint can is lifted 1.78 meters vertically to a shelf. what is the change potential energy of the paint can

How does wave energy impact the erosion of a rock?