All categories

3 years ago

Marcus tries to move a refrigerator but can't. Has he done work?

Physics

1 answer:

katen-ka-za [31]3 years ago

3 0

Answer:

Explanation:

Even if the refrigerator did not move he still used energy to try to push it it's just his energy wasnt stronger than the refrigerator's energy

You might be interested in

2. Superman is able to fly at an average velocity of 355 m/s. If he begins at a position of

lesya [120]

Answer:

final position = 325 m

Explanation:

distance covered in 1 second = speed x time

= 355 m/s x 1 s

= 355 m

∴ final position = initial position + distance covered

= - 30 m + 355 m

= 325 m

4 0

3 years ago

What type of conducting medium has the highest conductivity?

andreyandreev [35.5K]

I can't really answer this question without giving me any limits to the possibilities of the answers. However, I found a similar problem with a given set of choices. I think the answer is plasma. The medium that has the highest conductivity must be electric or ionized in nature. Since plasma is a very hot ionized gas, then it would be the most conductive out of all the choices.

3 0

3 years ago

Review. A bead slides without friction around a loop-the loop (Fig. P8.5). The bead is released from rest at a height h=3.50R (b

oksian1 [2.3K]

The normal force on the bead at point A is 1 N.

According to the Law Of Conservation of Energy, the total energy of the bead at the topmost point of height of 3.50 R is the same as its total energy at point A.

The energy at a height of 3.50R is equal to its potential energy which is

U= mgh= mg x 3.5R= 3.5mgR .........(i)

The energy at point A is,

E= mg(2R)+ 1/2 mv^2 ...........(ii)

Now, equating (i) and (ii)

3.5mgR = 2mgR + 1/2 mv^2

3.5mgR - 2mgR = 1/2mv^2

1.5gR = 1/2 v^2

3gR = v^2

V = √3gR

At point A, three forces are there weight of the bead(mg), normal reaction(N), and centripetal force(mv^2/r).

Balancing these forces,

mg + N = mv^2/r

N= mv^2/r - mg

Putting the given values in the above equation, we get the normal reaction

N= 1 N

Thus, the normal force on the bead at point A is 1N.

To know more about "Conservation of Mechanical Energy", refer to the following link:

brainly.com/question/11264649?referrer=searchResults

#SPJ4

8 0

1 year ago

What gravitational attraction does the moon have on the earth? (mass of earth is 6 x

lakkis [162]

Answer:

The moon's gravitational pull on the Earth is the main cause of the rise and fall of ocean tides. The moon's gravitational pull causes two bulges of water on the Earth's oceans—one where ocean waters face the moon and the pull is strongest and one where ocean waters face away from the moon and the pull is weakest.

Explanation:

5 0

3 years ago

If F(theta)=tan theta=3, find F(theta+pi)

Alex_Xolod [135]

The period of the tan function is π so (∅ + π) would yield the same value as ∅
F(∅ + π) = 3

4 0

3 years ago