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3 years ago

Weight gain occurs when a person consumes too muchimany

Physics

2 answers:

Vilka [71]3 years ago

7 0

Answer:

Calories

Explanation:

MAVERICK [17]3 years ago

5 0

The answer is calories !!

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Which describes the correct energy conversion when a solar cell is used to light a street lamp?

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I think it's a solar power might seem strange or futuristic but it's already quite common place you might have a solar powered quartz watch on your wrist or solar powered pocket calculator

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If there was a natural disaster and the people that were in this disaster were supposed to be there. There were 3 people in the

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3 years ago

A radar operates at a wavelength of 3 centimeters. what is the frequency of the these waves? the speed of light is 3 × 108 m/s .

aliya0001 [1]

We are given information:
λ $= wavelength = 3cm = 0.03m \\ 
c = speed of light = 3* 10^{8}m/s$

Formula that connects wavelength and frequency is:
$frequency= \frac{speed of light}{wavelength} \\ f= \frac{3* 10^{8}}{0.03} \\ f=1 * 10^{10} Hz = 10GHz$

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3 years ago

A dad pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a frequency of 18 rpm,

puteri [66]

Answer:

F = 176.175 N

Explanation:

given,

radius of merry - go - round = 2.7 m

mass of the disk = 800 kg

speed of the merry- go-round = 18 rpm

= 18 $\dfrac{2\pi }{60}$

= 1.88 rad/s

time = 13 s

mass of two children = 25 kg

ω = ω₀ + α t

1.88 = 0 + α(13)

α = 0.145 rad/s²

we know

τ = I α

so,

$I = \dfrac{1}{2}MR^2+ 2 MR^2$

$I = \dfrac{1}{2}\times 800 \times 2.7^2+ 2\times 25\times 2.7^2$

$I = 3280.5 kg.m^2$

τ = I α

τ = 3280.5 x 0.145

τ = 475.67 N m

τ = F x r

475.67 = F x 2.7

F = 176.175 N

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3 years ago

Why are jovian planets so much larger than terrestrial planets?

Nataly [62]

Explanation:

The temperature in the inner solar system was too high for light gases to condense, while in the outer solar system, the temperature was much lower, which allowed the Jovian planets to form, which grew enough to accumulate and retain the hydrogen gas that remained in the solar nebula, which led to its high levels of hydrogen and large size.

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3 years ago