An electric refrigerator rated 400 W operates 8 hours a day. Find the energy used per day in KWh.

Answers

Answer 1

Answer: 400 watts = 0.4 kw

(0.4 kw) x (8 hours) = 3.2 kw-hours

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Emotional abuse is less harmful than physical abuse.a. Trueb. False

)which technology keeps track of heart rate during a workout?O bathroom scale Ocalculator Opedometer
O wrist monitor

Answers

The technology is a Wrist monitor

Which one of the following types of electromagnetic radiation causes certain substances to fluoresce?A. Cosmic rays
B. Infrared waves
C. X rays
D. Ultraviolet rays

Answers

The answer is D. Uv causes more stuff to fouresce

Answer:

D. Ultraviolet rays

Explanation:

A red shift in the spectrum of the light from an object indicates the object is moving ____ you.a. away from
c. at a right angle from
b. toward
d. none of the above

Answers

A red shift in the spectrum of the light from an object indicates the object is moving a. away from you. A redshift occurs when light waves are stretched into lower frequencies. This is an example of the Doppler effect which makes use of the visible light spectrum where blue light has the highest frequency and red light has the lowest. This concept is often used by astronomers to measure the distances of galaxies and stars.

A red shift in the spectrum of the light from an object indicates the object is moving a. away from you. A redshift occurs when light waves are stretched into lower frequencies. a.away from

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.

Answers

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 dog looking for its bone in the yard, first heads 160.0° for 14.0 m and then turns and heads west for 8.50 m.a. What is the magnitude of the dog's displacement?
b. What is the direction of the dog's displacement?