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3 years ago

I need help with this

Physics

1 answer:

monitta3 years ago

7 0

1. For the first box, the answer is TIME
2. For the second box, the answer is VELOCITY

Hope this helps :)

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A laser pointer is placed on a platform that rotates at a rate of 60 revolutions per minute. The beam hits a wall 10 m away, pro

Sever21 [200]

Answer:

$v = 20\pi sec^2\theta$

Explanation:

As we know that the angle made with the vertical is given so we have

$tan\theta = \frac{x}{10}$

so we have

$x = 10 tan\theta$

now differentiate both sides with time

$v = \frac{dx}{dt} = 10 sec^2\theta \frac{d\theta}{dt}$

$v = 10 \omega sec^2\theta$

now we know that

$\omega = 2\pi f$

$\omega = 2\pi (\frac{60}{60})$

$\omega = 2\pi$

now we have

$v = 10(2\pi) sec^2\theta$

$v = 20\pi sec^2\theta$

7 0

3 years ago

Suppose you pull two opposite sides of the loop away from each other, such that the other two sides get closer, reducing the loo

HACTEHA [7]

Answer:

Explanation:

Magnetic field is oriented downwards . area of loop is decreasing so downward flux is decreasing . To increase the downward flux , current induced will be clockwise so that flux generated by induced current increases the downwards flux . It is in accordance with Len'z law.

6 0

3 years ago

You have 50L of water, it froze. So find its new volume. Density of water is 1000kg/m^3 or 1kg/L, density of ice is 920kg/m^3 or

ad-work [718]

Answer:

D (density) = Mass / Volume

V (ice) = Mass / Density = 50000 g / .92 kg / L

V = 50 kg / .92 kg / L

1 Liter of water weighs 1 kilogram = 50 L weighs 50000 g

V = 54.3 L the mass does not change upon the change of phase (freezing)

4 0

3 years ago

A car traveling south is 200 kilometers from its starting point after 2 hours. What is the average velocity of the car?

MakcuM [25]

The velocity of the car would be 100 kilometer per hour.

6 0

3 years ago

Read 2 more answers

Ana wonders how light can affect a mystery material. The table below shows what happens when different types of light hit the my

vivado [14]

The light can definitely change the mystery material. This can occur through a change in temperature or color (option C).

A material is affected by light mainly if the material absorbs the light. Based on the chart, we know this mystery material can absorb two types of light:

Red light.
Yellow light.

Moreover, this phenomenon can lead to two main changes:

Change in temperature: Light affects materials by increasing their temperature of these. A common example is the way the temperature of an object increases if it is exposed to sunlight.
Change in color: Some materials react to light by changing their color.

Based on this, the material can change its color or temperature.

Note: This question is incomplete; here is the missing part:

A. Yes, but the mystery material can change in only one way, such as by getting warm, because all the light that a material absorbs will affect that material in the same way.

B. No. The mystery material can’t change because the light is not a physical thing. Light cannot change physical things like the mystery material.

C. Yes and the mystery material can change in one or two different ways, such as by getting warm and/or changing color, because different types of light can cause different changes to a material when they are absorbed.

D. There is no way to know whether the mystery material will change or not.

Learn more about sunlight in: brainly.com/question/1603783

3 0

3 years ago