In terms of energy, how would you classify the following chemical reaction?

2Cu + O2 + 315 KJ---> 2CuO A. endothermic

B. exothermic

C. both endothermic and exothermic

D. Neither endothermic nor exothermic

Two people use a ramp to move a heavy box on to a truck. The box weighs 750 N the mechanical advantage of the ramp is 4. How much effort is needed to move the box

Use the words below to fill in the gaps showing the path of air coming in and out of the respiratory system (you will have to use each word twice). Trachea Alveoli Bronchioles Bronchi Bronchus Blood Mouth Mouth Air coming in Air coming out Cells

In a nuclear experiment a proton with kinetic energy 3.0 MeV moves in a circular path in a uniformmagnetic field. What energy must the following two particles haveif they are to circulate in the same orbit? (a) an alpha particle (q = + 2e, m = 4.

A tank is 3 m long 1 m wide and 0.5 m deep is filled with oil which weighs 12000 N what is the pressure on the base at tank due to oil?

When you put your hands on a cold object like a glass of ice water your hands become?

A girl is walking 2km north them east then south then west whar is her displacement

Find the y-component of this vector:73.3,12.0m. Remember, angles are measured from the + x axis.

A smaller unit of volume than a milliliter would be a microliter. A microliter is one-millionth of a liter. Select one: a. True b. False

What material are oil pipelines made from?

What is the speed of a car going v=1.000mphv=1.000mph in SI units? Notice that you will need to change from miles to meters and from hours to seconds. You can do each conversion separately.