A 4400 W motor is used to do work. If the motor is used for 200 s, how much work could it do? (Power: P = W/t)

22 J

4200 J

4600 J

880,000 J

Question

A 4400 W motor is used to do work. If the motor is used for 200 s, how much work could it do? (Power: P = W/t)


22 J

4200 J

4600 J

880,000 J

johnweldon1993 · Answer

Well we have the equation given

$$\large Power = \frac{Work}{Time}$$

So that means

$$\large Work = Power \times Time$$

We see that Power = 4400W
And we see that Times = 200s

So

$$\large Work = 4400W \times 200s = ?$$

anonymous · Answer

880000?

johnweldon1993 · Answer

Correct

$$\large Work = 880,000Ws = 880,000J$$

anonymous · Answer

Thank you!!

johnweldon1993 · Answer

No problem!

anonymous · Answer

How about this one? 

In the reaction C + O2 → CO2, 18 g of carbon react with oxygen to produce 72 g of carbon dioxide. What mass of oxygen would be needed in the reaction?


18 g

54 g

72 g

90 g

johnweldon1993 · Answer

Sorry not good at all with chemistry! :(

anonymous · Answer

It's okay neither am I! ;D