What are the differences and relationships between speed, velocity, and acceleration

1 answer:

3 0

Velocity is the rate of change of position with respect to time, whereas acceleration is the rate of change of velocity. Both are vector quantities (and so also have a specified direction), but the units of velocity are meters per second while the units of acceleration are meters per second squared.

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An unpolarized light with an intensity of 20W/m^2 is passed through a pair of polarizers. The first polarizer is set at an angle

bogdanovich [222]

Answer:

4.416 W/m²

Explanation:

Malus' law is given mathematically as

I = I₀ cos² θ

For the first polarizer, θ = 60°

I₁ = I₀ cos² 60°

I₁ = I₀ (0.5)² = 0.25I₀

For the second polarizer, θ = 20°

I₂ = I₁ cos² 20°

I₂ = I₁ (0.9397)² = 0.883 I₁

I₂ = 0.883 × 0.25I₀ = 0.2208 I₀

Note that

I₀ = 20 W/m²

I₂ = 0.2208 × 20 = 4.416 W/m²

Hope this Helps!!!

6 0

3 years ago

What happens to the velocity of an object when balanced force acts on it?

Pani-rosa [81]

When the entire group of forces acting on an object is balanced,
the individual forces all add up to zero, and the effect on the object
is the same as it would be if there were no force at all acting on it.

No force on it means no acceleration ... no change in speed or
direction of motion.

No change in speed or direction of motion means constant velocity.

8 0

4 years ago

Melting ice caps can result in _____.

IceJOKER [234]

Melting of ice caps ... causing them to shrink in coverage .. can result in ...

-- wet ground

-- more farming opportunities, but less skiing

-- higher sea level

-- coastal flooding

-- extinction of plant and animal species

-- more icebergs floating around

-- lower average albedo, higher solar absorption, widespread warming