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2 years ago

5

Daniel is 50.0 meters away from a building. He observes that his line-of-sight to the tip of the building makes an angle of 63.0

° with the horizontal. What is the height of the building?

1 answer:

valentina_108 [34]2 years ago

8 0

Answer:

willie tower

Explanation:

mataas kasi

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A ball is thrown horizontally from the top of a building 0.10 km high. The ball strikes the ground at a point 65 m horizontally

Alex787 [66]

Answer:

47 ms

well the time it takes to fall 100m is the same time it takes to travel 65m horizontally.

The time to fall vertically, t is sqrt(2d/g). [this comes from d = 1/2at^2]

so t = sqrt(2*100/9.8) = 4.52s.

The vertical speed at that time is g*t = 9.8*4.52 = 44.3m/s

The horizontal speed is the horizontal distance over the same 4.52s, = 65/4.52 = 14.4m/s.

so the final velocity is = sqrt(44.3^2 + 14.4^2) = 47.ms

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3 years ago

39.Explain the working mechanism of a mercury barometer.

alina1380 [7]

One end is sealed to prevent air from disturbing the scale and measures. Therefore, a Mercury Barometer works on the principle of balancing the atmospheric pressure with the volume of mercury present in the device

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3 years ago

PHYSICS HELP PLEASE!! MUST SHOW MATH WORK!!

SVETLANKA909090 [29]

<u>Answer:</u>

1) Distance traveled by bird = 403 meter

2)Average speed = 1.66 km /hour

3) Zcceleration = 2 $m/s^2$

<u>Explanation:</u>

1) Distance traveled = Speed * Time taken = 31 * 13 = 403 meter.

2) Average speed = Total distance covered / Time taken for that distance to cover.

Total distance covered = 2+0.5+2.5 = 5 km

Time taken = 3 hours

Average speed = 5/3 = 1.66 km /hour

3) Acceleration is defined as the rate of change of velocity, so acceleration a = change in velocity/time.

Change in velocity = 14 - 6 = 8 m/s

Time = 4 seconds

So acceleration = 8 / 4 = 2 $m/s^2$

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3 years ago

The angle between the incident ray and the surface of a plane mirror is 20'. What is the total angle rotated by the incident ray

Dahasolnce [82]

Angle made by the light ray with the surface of mirror is given as

$\theta_i = 90 - 20 = 70$ degree

now as we know as per law of reflection that

angle of incidence = angle of reflection

So here we can say that

$\theta_i = \theta_r$

$\theta_r = 70 degree$

now the total angle that reflected ray will rotate with respect to incident ray is known as angle of deviation

$\delta =180 - \theta_i - \theta_r$

$\delta = 180 - 70 - 70 = 40 degree$

so here reflected light will deviate by total angle of 40 degree fron its incident ray.

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4 years ago

What type of circuit is illustrated PLEASE HELPPP

kumpel [21]

Well the shown circuit is definitely open because the lines are not connected. And it is not a parallel circuit because there would be more lines. Like a string of Christmas lights. So it must be an "open series circuit".

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3 years ago