After a large snowstorm, you shovel 2,500 kilograms of snow off of your sidewalk in half an hour. You liftthe shovel to an average height of 1.5 meters while you are piling the snow in your yard. a. How much work did you do? Hint: The force is the weight of the snow. b. What was your power in watts? Hint: You must always convert time to seconds when calculating power.
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Answer 1
Answer:
Well, the snow has a total weight G=mg=25,000 N. The work is L=Fd=Gh=1.5*25,000=37,500 J. The power is L/t, where t=1800 seconds. P=37,500/1800=20.833 W.
A substance has a melting point of 0 degrees celsius and a boiling point of 100 degrees celsius. The substance is most likelya. water b. hydrogen c. gold d. table salt
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water. These physical properties are specific to water.
What does a reference point provide
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to check progress and direction
Frequency could be measured using which quantity?a. meters b. seconds c. waves per second d. meters per second
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Frequency is the amount kf waves that pass a certain point jn a given amount of time- so the answer is c
What role does energy play when an object is not moving?