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hammer [34]
1 year ago
10

An astronaut is weighed before he sets off to the Moon. He has a mass of 80 kg.

Physics
1 answer:
denpristay [2]1 year ago
8 0

<em>formula</em>

<em>weight</em><em>=</em><em> </em><em>mass×</em><em>g</em><em>r</em><em>a</em><em>v</em><em>i</em><em>t</em><em>y</em>

<em>weight</em><em>=</em><em>8</em><em>0</em><em>×</em><em>1</em><em>0</em><em>=</em><em>8</em><em>0</em><em>0</em>

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A plane mirror of circular shape with radius r=20cm is fixed to the ceiling. A bulb is to be placed on the axis of the mirror. A
KIM [24]

Answer:

0.75 m

Explanation:

Let's call the distance between the bulb and the mirror x.

The bulb and the length of the mirror form a triangle.  The mirror and the illuminated area on the floor form a trapezoid.  If we extend the lines from the mirror edge to the reflected image of the bulb, we turn that trapezoid into a large triangle.  This triangle and the small triangle are similar.  So we can say:

x / 0.4 = (3 + x) / 2

Solving for x:

2x = 0.4 (3 + x)

2x = 1.2 + 0.4 x

1.6 x = 1.2

x = 0.75

So the bulb should located no more than 0.75 m from the mirror.

5 0
3 years ago
Wich usage of water uses the least amount in a year in the united states
Lapatulllka [165]

Live Stock because in 2010 live stock used 10,000 millions gallons of water per day but everything else was higher and irrigation is the highest with 115,000 million gallons per day.

6 0
2 years ago
Read 2 more answers
Different kinds of lenses are used in eyeglasses to help people with eye conditions. Farsightedness is an eye condition in which
andriy [413]

Answer:

tyy

Explanation:

5 0
2 years ago
What is the missing number in the nuclear reaction shown below? 237 Np 93 - 4 He+ 2 233 ? Pa
Luden [163]

Answer:

91 is the missing number because an alpha particle with a charge of 2 was emitted.

4 0
1 year ago
Suppose that a pane of crown glass, with a refractive index of 1.52, is immersed in water, which has a refractive index of 1.33.
mylen [45]

Answer:

the angle made by this ray with normal will be 45°

Explanation:

given,                                                      

refractive index of crown glass = 1.52

refractive index of the water = 1.33        

ray of light in water strikes glass at 45°                      

angle subtended by the light when it reenter water = ?                  

When light enter in the glass from the water it get bend toward normal because refractive index of glass is more than water.              

And when ray comes out of the glass it is parallel to the initial light ray.

hence, the angle made by this ray with normal will be 45°

3 0
3 years ago
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