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3 years ago

5

Energy from the sun is used by solar collectors to heat water or by solar cells to store energy for electricity. One disadvantag

e of solar energy is that _____

1 answer:

torisob [31]3 years ago

7 0

Answer: lots of them

Explanation:

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1) The current in a light bulb is 0.335 Amps. How long does it take for a total charge of 2.76 C to

uysha [10]

Answer:

Time=8.23880597 seconds

Explanation:

Quantity of charge(q)=2.76c

Current(I)=0.335A

Time(t)=?

t=q/I

t=2.76/0.335

t=8.23880597seconds

7 0

3 years ago

An object at rest on a flat, horizontal surface explodes into two fragments, one seven times as massive as the other. The heavie

Arte-miy333 [17]

Answer:

<em>the distance d traveled by the lighter fragment is 58.1 m.</em>

<em></em>

Explanation:

mass of the lighter fragment = m

the lighter fragment traveled a distance = ?

mass of the heavier fragment = 7m

the distance covered by the heavier fragment = 8.30 m

The two particles will be given the same amount of energy from the explosion. This energy is used to do work by the two fragments.

work done by heavier fragment w = mgd

where m is the mass

g is acceleration due to gravity

d is the distance traveled.

substituting, the work done by the heavier fragment is

w = 7m x g x 8.3 = 58.1mg

The same way, the lighter fragment does work of

w = mgd

equating the two work done since they are given the same amount of energy from the explosion, we have

58.1mg = mgd

mg cancels out, we have

<em>the distance d traveled by the lighter fragment d = 58.1 m</em>

8 0

3 years ago

How does the ocean influence climate?

choli [55]

The answer is a no problem

5 0

3 years ago

You’re still in a redecorating mood and want to move a 35kg bookcase to a different place in the living room. You exert 58 N on

CaHeK987 [17]

Answer: 0.16

Explanation:

Newton's second law states that the resultant of the forces exerted on the bookcase is equal to the product between the mass (m) and the acceleration (a):

$F-F_f = ma$

where

F = 58 N is the force applied

Ff is the frictional force

Substituting, we find the frictional force

$F_f = F-ma=58 N-(35 kg)(0.12 m/s^2)=53.8 N$

The frictional force has the form:

$F_f = \mu mg$

where $\mu$ is the coefficient of kinetic friction. Re-arranging the formula, we can find the coefficient:

$\mu=\frac{F_f}{mg}=\frac{53.8 N}{(35 kg)(9.8 m/s^2)}=0.16$

4 0

4 years ago

Is there gravity in space? If so name one piece of evidence

Eddi Din [679]

There is gravity everywhere in space. In fact, it's how the moon orbits the Earth. Also, gravity in space assists the Earth to orbit the sun. These are caused by small areas of gravity. The term for this is called "microgravity".

I hope this helps!

8 0

4 years ago