What happens during midwinter when the north pole is tilted away from the sun? a) there is no night. b) the days are very long. c) the days are very short. d) there is no sun at all.

A100-watt light bulb radiates energy at a rate of 100 j/s. (the watt, a unit of power or energy over time, is defined as 1 j/s.) if all of the light emitted has a wavelength of 525 nm , how many photons are emitted per second?

Choose an equation that represents an enzyme-catalyzed reaction. (a) enzyme + substrate → enzyme-substrate complex (b) enzyme + substrate ←−→ enzyme + products (c) enzyme + substrate ←−→ enzyme-substrate complex → enzyme + products (d) enzyme + substrate ←−→ enzyme-substrate complex → enzyme-substrate complex + products

When a device is used in a circuit in which the voltage is 81 v the current flowing through the device is 3 a what is the resistance of the device