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lozanna [386]
2 years ago
13

HELP FAST!!!!!

Physics
2 answers:
dangina [55]2 years ago
7 0
Mirror bounces or reflects the light that passes to it

Glass of water bends or refracts the light that passes through it

Dark fabric reflects some of the light (which is why we still see it) and absorbs some of it
Paul [167]2 years ago
4 0
Mirror: Reflects off of
Glass of water: Goes through
Dark Fabric: Absorbs into
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A material that has high resistance to the flow of electric current is called an electric ______
lyudmila [28]
A material that has high resistance to the flow of electric current is called an electric resistor
3 0
3 years ago
Read 2 more answers
If the kinetic energy of a given mass is to be doubled, its speed must be multiplied by
Tomtit [17]

Answer:

Either B or D. The answer itself is 2.

Explanation:

The equation for the kinetic energy would be 1/2*mv^2.

When m is doubled, we can plug in 1 and 2 to compare our answers.

Plugging in 1 for mass would give us the answer 1/2*v^2.

Plugging in 2 for mass would give us v^2. This means that the velocity was multiplied by 2, meaning that the answer is it is multiplied by 2.

I am not sure which answer is correct since there seems to be two answer choices with 2 in it, but the answer is either B or D (I will call it ABCD because I do not want to cause confusion by saying 2 multiple times).

3 0
3 years ago
A car is being driven down a level track with no net force on it. This motion is best described as
Alex

A)Linear motion

If there is not net force on the car, then by the Newton Second Law, the acceleration is zero, and the only valid option for zero acceleration is A).

3 0
2 years ago
As a roller coaster car crosses the top of a 50-m-diameter loop-the-loop, its apparent weight is the same as its true weight.
scZoUnD [109]

Answer:22.36 m/s

Explanation:

Given

the diameter of loop d=50 m

the radius of loop r=25 m

At the top position, we can write,

weight and Normal reaction combination will provide the centripetal force i.e.

R+W=\frac{mv^2}{r}

R=W\quad \quad [\text{apparent weight =Actual weight}]

2W=2mg=\frac{mv^2}{r}

v=\sqrt{2gr}

v=\sqrt{2\times 10\times 25}

v=22.36\ m/s

3 0
3 years ago
A rock has 750 J of potential energy as it sits on a ledge. If the rock were pushed off the ledge, how much would it have just b
wariber [46]

Answer:

the 750 j will have potential energy is 375

Explanation:

750/2 is 375

8 0
2 years ago
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