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aliya0001 [1]
3 years ago
8

While camping in a tent on a cold night, which would keep you warmer for a longer period of time. a 10 kg

Physics
1 answer:
Masja [62]3 years ago
4 0

Answer:

a 10 kg bag of hot water at the same temperature

Explanation:

A 10kg bag of hot water at the same temperature will retain heat much better and keep the tent warmer at night compared to the iron pellet.

  • Water has a very large specific heat capacity.
  • The specific heat capacity of water allows for it to retain heat better.
  • It takes a larger amount of heat to warm water compared to iron which is a better conductor.
  • In like manner, it takes more time for water to lose that amount of heat it has gained by the heating process.
  • This is why it is a better choice to keep the room warm
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velocity and wavelength are likely to change in the process

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        brainly.com/question/12571787

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6 0
3 years ago
The coefficients of friction between the 20-kg crate and the inclined surface are µ,8 = 0.24 and J.lk = 0.22. If the crate start
Yanka [14]

Answer:5.60 m/s

Explanation:

Given

Coefficient of static friction \mu _s=0.24

Coefficient of kinetic friction \mu _k=0.22

mass of crate m=20\ kg

Force applied F=200\ N

maximum static Friction F_s=\mu _sN

N=mg

F_s=0.24\times 20\times 9.8

F_s=47.04\ N

thus applied force is greater than Static friction therefore kinetic friction will come into play

F_k=\mu _kN

F_k=0.22\times 20\times 9.8=43.12\ N

net Force on crate F-F_k=ma

a=\frac{200-43.12}{20}=7.84\ m/s^2

Magnitude of velocity can be obtained by using

v^2-u^2=2as

where v=final velocity

u=initial velocity

a=acceleration

s=displacement

here initial velocity is zero as crate start from rest

v^2-0=2\times 7.84\times 2

v=\sqrt{31.37}

v=5.60\ m/s                                          

7 0
4 years ago
A child pulls on a wagon with a horizontal force of 75 N. If the wagon moves horizontally a total of 42 m in 1.5.0 min, what is
d1i1m1o1n [39]

Answer:

B) 35 W

Explanation:

Force applied by child =  75 N = F

Distance travelled by child = 42 m = d

Time traveled for is 1.5 min = 1.5×60 = 90 seconds = t

Work done by the child

W = Fdcosθ

⇒W = 75×42cos0

⇒W = 3150 Joule

Power is defined as work done per unit time

P=\frac{W}{t}\\\Rightarrow P=\frac{3150}{90}=35\ W

∴ The average power generated by the child is 35 W

4 0
4 years ago
What does Kepler's second law state? A. Planets travel in ellipses. B. Planets sweep equal areas in equal times. C. A planet's a
andrey2020 [161]
Kepler's second law of planetary motion says that the imaginary line
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It's just as true of comets, asteroids, dwarfs, coasting space probes ...
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