N instrument uses a battery that provides 500 J of energy for 1200 seconds. What is the power of the instrument?
What do you know?
power = ; energy =500 ; time = 1200
Use the formula.
P = =
State the power in watts.

0.42 watts

Explanation:

Given that:

power = ?

energy =500 joules

time = 1200 seconds

Recall that power is the rate of energy expended per unit time

i.e Power = energy / time

Power = 500J / 1200seconds

Power = 0.416 watts (rounded to the nearest hundredth as 0.42 watts)

Thus, the power of the instrument is 0.42 watts

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2