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3 years ago

when a beam of light passes at an oblique angle into the material of lower optical density the angle is of incidence is

Physics

1 answer:

butalik [34]3 years ago

3 0

Penn Foster Students: less than the angle of refraction

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Which describes the genetic disorder that causes neurons in the brain to break down? scribes the genetic disorder that causes ne

attashe74 [19]

Genetic disorders and Parkinson's disease.

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3 years ago

PLEASE HELP AS FAST AS POSSIBLE!!!!!!!!

mash [69]

B. Frequency divided by wavelength

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4 years ago

1. A vector is given by its components, Ax = 2.5 and A, = 7.5. What angle

Allushta [10]

Answer:

A) 72° or 71.56°

Explanation:

We have two components on the X-axis and y-axis respectively. So we can use the tangent of the angle to be able to find the angle with respect to the horizontal component.

Ax = 2.5

Ay = 7.5

tan(α) = 7.5/2.5

$\alpha = tan^{-1} (3)\\$

α = 71.56°

4 0

3 years ago

A water pump draws about 9 A when connected to 240 V. What is the cost (with electrical energy at 13 cents per kWh) of running t

Fiesta28 [93]

Answer:

4.49 dollars

Explanation:

i = 9 A, V = 240 V, t = 16 h

Energy = V x i x t = 240 x 9 x 16 = 34560 W h = 34.56 kWh

The cost of 1 kWh is 13 cents.

Cost of 34.56 kWh = 13 x 34.56 = 449.28 cents = 449.28 / 100 = 4.49 dollars

8 0

4 years ago

Q4. Consider the skier on a slope shown in the figure below. Her mass including equipment is 55.0 kg.

Shkiper50 [21]

Answer:

Part a)

When there is no friction then acceleration is

$a = 4.14 m/s^2$

Part b)

if there is friction force along the inclined then acceleration is

$a = 3.33 m/s^2$

Explanation:

Part a)

As we know that the skier is on inclined plane

So here if there is no friction then net force along the inclined plane is given as

$F = mg sin\theta$

now acceleration of the skier is given as

$a = \frac{F}{m}$

$a = g sin\theta$

$a = 9.81(sin25)$

$a = 4.14 m/s^2$

Part b)

if there is friction force along the inclined then net force along the inclined plane is given as

$F = mg sin\theta - F_f$

now acceleration of the skier is given as

$a = \frac{F}{m}$

$a = g sin\theta - \frac{F_f}{m}$

$a = 9.81(sin25) - \frac{45}{55}$

$a = 3.33 m/s^2$

5 0

4 years ago