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3 years ago

11

What is the speed of an object that moves 100 km in 45 minutes?

1 answer:

lana [24]3 years ago

5 0

133 kilometers per hour

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Both gamma rays and x-rays are used to see inside the body. Which one is used to make images of bones?

rewona [7]

X-rays take images of bones

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3 years ago

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Which of the following would be valid reason to NOT build the power plant?

Inessa [10]

Answer:

all of the above

Explanation:

because power plant are the ones that cause pollution,it can also destroy ecosystems for animals,and it cant be built anywhere.

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3 years ago

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Radio waves just like light waves can be reflected refracted and diffracted and polarized.

hoa [83]

<span>Radio waves just like light waves can be reflected refracted and diffracted and polarized. The answer is True. </span>These characteristics are the common phenomena for electromagnetic (EM) waves, and Radio Waves are electromagnetic Waves so much so that they obey reflection, refraction, and diffraction.

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3 years ago

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The acceleration due to gravity on the Moon's surface is

Molodets [167]

Answer:

50 lb

Explanation:

Given,

The weight of astronaut's life support backpack on Earth (w) = 300 lb

Acceleration due to gravity on Earth (g) = 9.8 m/s²

Acceleration due to gravity on Moon = g'

$g'=\frac{g}{6}$

We know that weight of an object on Earth is,

$w = m\times g$

$m = \frac{w}{g}$

Similarly, weight on Moon will be

$w' = m\times g'$

$w' = \frac{w}{g}\times\frac{g}{6}$

$w' = \frac{300}{6}$

$w' = 50$

Thus the astronaut's life support backpack will weigh 50 lb on Moon.

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3 years ago

Which of the following is evidence that supports the big bang theory?

Stella [2.4K]

Answer:

D

Explanation:

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2 years ago