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krek1111 [17]
2 years ago
13

The refractive index of glass is 1.52

Physics
1 answer:
Ksenya-84 [330]2 years ago
3 0

Explanation:

..upper side is glass ..

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What is the gravitational relationship between two objects?
Inessa [10]
I think the right answer would be objects pull because gravitational pull is when an object with more mass than an other object would pull the small mass object
5 0
3 years ago
The speed of a wave on a rope is 50cm/s an its wave length is 10cm. What is its frequency
givi [52]
You have to put the work to it and but the answer is 30cm
6 0
3 years ago
A 2.74 g coin, which has zero potential energy at the surface, is dropped into a 12.2 m well. After the coin comes to a stop in
nata0808 [166]

Answer:

- 0.328J

Explanation:

POTENTIAL ENERGY = mgh

                                   = 0.00274 × 9.81×12.2  here 2.74g = 0.00274kg

                                   = 0.32792868 J

                                   = 0.328J

AS IT IS BELOW THE SURFACE HENCE MUST BE NEGATIVE

hence potential energy = - 0.328J

8 0
3 years ago
Calculate the kinetic energy of a car of mass 1.0*10^3kg moving with a velocity of 108km/h<br>​
Alekssandra [29.7K]

Answer:

450000 kg m/s

Explanation:

convert 108km/h to m/s

1km=100m

1h=(60×60)s = 3600s

108km/h= (108×1000)÷3600

=30m/s

K.E =1/2mv^2

=1/2(1×10^3)(30^2)

= 1/2 × 1000 × 900

= 450000 kg m/s

this should be your answer, hope I was able to help.

6 0
2 years ago
How do i solve this step by step
NikAS [45]

Answer:

176.4 meters

Explanation:

The first equation is for average velocity.  The other three are the constant acceleration equations you'll need to know.

v = at + v₀

v² = v₀² + 2a(x − x₀)

x = x₀ + v₀ t + ½ at²

x is the final position

x₀ is the initial position

v is the final velocity

v₀ is the initial velocity

t is time

a is acceleration

Notice that the first equation is independent of position.

The second equation is independent of time.

The third equation is independent of final velocity.

So knowing which information you <em>don't</em> have will point you to which equation you should use.

Let's begin:

"Which one would be best to find the distance the object fell from free-fall if it fell for six seconds, assuming if fell in the absence of air resistance and it still hasn't hit the ground?  Solve this problem and show all steps of work."

We want to find the distance (change in position).  We're given the time (t = 6 s) and we're given the acceleration (free fall without air resistance, so a = -9.8 m/s²).

We aren't given the final velocity, so the equation we should use is the third one:

y = y₀ + v₀ t + ½ at²

Unfortunately, we aren't told the initial velocity, but if we assume that the object starts at rest, then v₀ = 0 m/s.  Substituting all values:

y = y₀ + (0 m/s) (6 s) + ½ (-9.8 m/s²) (6 s)²

y − y₀ = -176.4 m

The displacement is -176.4 m.  Distance is the magnitude of displacement, so we can say the object fell 176.4 meters.

3 0
3 years ago
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