The photosystem channels the excitation energy gathered by absorption of light by any one of the pigment molecules to a specific reaction center chlorophyll, which in turn passes the energy to:

A package is pushed across the floor a distance of 90 feet by exerting a force of 32 lbs downward at an angle of 24 ∘ with the horizontal. How much work is done? Round to the nearest foot pound.

When resistors are connecting in a series, does the position of ammeter make any difference?

Trevor lifts a 10kg box to the top of a cliff which is 20m high, in half an hour, then drops the box over the cliff. How much power did he use to lift the box?

Which instrument is launched into the atmosphere to collect pressure, temperature, humidity, wind speed, and other data? a. satellite b. barometer c. radiosonde d. hygrometer

Object 1 and 2 attract each other with a electrostatic force of 36.0 units. If the charge of object 1 is changed to four times the original value, then the new electrostatic force will be

Which of the following describes temperature

Which of the following items are affected the most by the force of gravity? A. A tennis ball B. A golf ball C. A baseball D. A bowling ball

Cooling down after a workout allows the oxygen to continuing moving through the body and keeps the muscles from tightening up to fast

The force that slows down and eventually stops a ball you roll across the pavement is called

The force of friction on an object is dependent on two things. what are they?