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katrin [286]
3 years ago
9

Heat pumps move heat from __________ to __________ areas & REQUIRES energy. *

Physics
1 answer:
sergejj [24]3 years ago
8 0
The correct answer to this question is false
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sergejj [24]

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it cools down the cancer cells

Explanation:

The cancer cells are rapidly reproducing and when you cool it down it slows down the mutation/ reproduction process.

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4 years ago
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True or False: A change of 1 pH unit represents a tenfold change in the<br> acidity of the solution.
alisha [4.7K]

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I was also going to ask same question edited:ok i found its true

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5 reasons why people should use electricity wisely​
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Answer:

1. heating

2. entertainment

3. cooling

4.educational purpose

5.comfort

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3 years ago
The weight of spaceman Speff at the surface of planet X, solely due to its gravitational pull, is 389 N. If he moves to a distan
9966 [12]

Answer

given,

W = weight of speff at surface of planet = 384 N  

h= height = 1.86 x 10⁴ Km

W' = weight of speff at height h from the planet = 24.31 N

Ms = speff mass = 75 kg

M= mass of planet = ?  

R = radius of planet

G = 6.67 x 10⁻¹¹ m³/kg.s²

g = \dfrac{W}{M}

g = \dfrac{389}{75}

g = 5.187 m/s²

we know,

g = \dfrac{GM}{r^2}

5.19 = \dfrac{GM}{r^2}.......(1)

now,

g' = \dfrac{W}{M}

g' = \dfrac{24.31}{75}

g' = 0.324 m/s²

g = \dfrac{GM}{(r+h)^2}

0.324= \dfrac{GM}{(r+h)^2}.........(2)

dividing equation (1)/(2)

\dfrac{5.19}{0.324}=(\dfrac{(r+h)}{r})^2

4=1+\dfrac{h}{r}

r = \dfrac{1.86\times 10^4}{3}

r = 6.2 x 10⁶ m

mass of planet X

from equation 1

M = \dfrac{g.r^2}{G}

M = \dfrac{5.19 \times (6.2\times 10^6)^2}{6.2 \times 10^{-11}}

M = 3.21 x 10²⁴ kg

8 0
3 years ago
X-rays generally have _____ energy and a _____ frequency.
Nonamiya [84]

Answer: D

X-rays generally have high energy and a high frequency.

Explanation:

High-energy X-rays or HEX-rays are very hard X-rays, with typical energies of 80–1000  keV (1 MeV), about one order of magnitude higher than conventional X-rays (and well into gamma-ray energies over 120 keV).

Radio waves have much longer wavelengths and lower frequencies than do visible light waves. In contrast, X-rays have much shorter wavelengths and higher frequencies. Likewise, red light has a longer wavelength than blue light. We can also think of light as consisting of particles or packets on information that we call photons.

3 0
3 years ago
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