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3 years ago

Very short answer questions.

Physics

1 answer:

inysia [295]3 years ago

5 0

1:-A convex lens is a lens that converges rays of light that are travelling parallel to its principal axis.

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A man cleaning his apartment pushes a vacuum cleaner with a force of magnitude 84.5 N. The force makes an angle of 33.9 ◦ with t

Sav [38]

Answer:

183.75641 Joules

Explanation:

F = Force of the vacuum cleaner = 84.5 N

s = Displacement of the vacuum cleaner = 2.62 m

$\theta$ = Angle the force makes with the horizontal = 33.9°

Work done is given by

$W=F\times scos\theta\\\Rightarrow W=84.5\times 2.62\times cos33.9\\\Rightarrow W=183.75641\ J$

The work done by the force of the vacuum cleaner is 183.75641 Joules

6 0

3 years ago

An unpolarized beam of light with an intensity of 4000 W/m2 is incident on two ideal polarizing sheets. If the angle between the

erastova [34]

Answer:

The intensity is $I_2 = 1654 \ W/m^2$

Explanation:

From the question we are told that

The intensity of the unpolarized light is $I_o = 4000 \ W/m^2$

The angle between the ideal polarizing sheet is $\theta = 0.429 \ rad = 0.429 * 57.296 = 24.58^o$

Generally the intensity of light emerging from the first polarizer is mathematically represented as

$I_2 = \frac{I_o}{2}$

substituting values

$I_1 = \frac{4000}{2}$

$I_1 = 2000 \ W/m^2$

Then the intensity of incident light emerging from the second polarizer is mathematically represented by Malus law as

$I_2 = I_1 cos^2 (\theta )$

substituting values

$I_2 = 2000 * [cos (24.58)]^2$

$I_2 = 1654 \ W/m^2$

4 0

4 years ago

The mass of the motorbike and rider is 286 kg. Calculate the acceleration of the motorbike at this moment in time.

Aleks04 [339]

Answer:

$a=4.03\ m/s^2$

Explanation:

Given that,

The mass of the motorbike and rider is 286 kg.

We need to find the acceleration of the motorbike at this moment in time.

Net force acting on the bike is given by :

F = 2000 N - 845 N = 1155 N

Let a be the acceleration of the motorbike. So,

$a=\dfrac{F}{m}\\\\a=\dfrac{1155}{286}\\\\a=4.03\ m/s^2$

So, the acceleration of the motorbike is $4.03\ m/s^2$ .

7 0

3 years ago

What do you notice about the lines of earthquakes and volcanoes and where they seem to occur on Earth's surface?

Stolb23 [73]

Answer:

Most earthquakes and volcanoes occur because of the movement of the plates, especially as plates interact at their edges or boundaries.

Explanation:

3 0

3 years ago

The amount of energy absorbed by a vehicle in an impact is related to __________ A. the direction of the impact. B. the design o

elena55 [62]

I think its most likely a the direction of the impact

8 0

3 years ago

Read 2 more answers