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Schach [20]
3 years ago
6

1 state the laws of refraction and define refractive index

Physics
1 answer:
oee [108]3 years ago
6 0

Answer:

resiprical 3/412358965

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a=(v-u)/t is how you find acceleration.

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A 0.86 kg rock is projected from the edge of the top of a building with an initial velocity of 8.65 m/s at an angle 46◦ above th
Georgia [21]

Answer:

Height of the building = 11.4 m

Explanation:

As we know that the stone is projected at an angle 46 degree with speed 8.65 m/s

so the two components of the speed is given as

v_x = 8.65 cos46

v_x = 6 m/s

vertical component of the speed is given as

v_y = 8.65 sin46

v_y = 6.22 m/s

now we know that the ball strike at horizontal distance of 13.7 m

so we will have

x = v_x t

13.7 = 6 t

t = 2.28 s

now we know that in vertical direction ball will move under uniform gravity so we can use kinematics

y = v_y t + \frac{1}{2}at^2

y = 6.22(2.28) - \frac{1}{2}(9.81)(2.28^2)

y = -11.4 m

Height of the building = 11.4 m

3 0
3 years ago
Read 2 more answers
What will be the density of the air if the radius of the cylinder is halved while the length is unchanged?
pickupchik [31]

If the radius of the cylinder is halved and length is kept unchanged then the density of air inside the cylinder will increase.

As it can be said that density is inversely proportion to the square of the radius.

Density of Cylinder

Density is the ratio of mass to volume.

The formula for density is: ρ= m/v.

The formula for the Mean Density of a cylinder is:

                                         ρ= m/ (π•r²•h)

where:

ρ is the density of the cylinder

m is the mass of the cylinder

h is the height of the cylinder

So, with increase in radius the of the cylinder there is decrease in the density of cylinder.

And on decreasing the radius of the cylinder there is increase in the density of the cylinder.

As it can be said that density is inversely proportion to the square of the radius.

To learn more about Density Of Cylinder

brainly.com/question/19245086

#SPJ4

8 0
2 years ago
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