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natita [175]
3 years ago
5

ASAPPP

Physics
2 answers:
katen-ka-za [31]3 years ago
8 0
Power is the rate at which work is done (2nd option)
frozen [14]3 years ago
5 0

Answer:

Power is the rate at which work is done.

Explanation:

The work done divided by total time taken is called power of an object. The SI unit of power is watts. It is denoted by W. Its expression is given by :

P=\dfrac{W}{t}

Since, W = F.d

P=\dfrac{F\times d}{t}

Since, \dfrac{d}{t}=v

P=F\times v

It is also equal to the product of force and velocity. Hence, the correct option is (c).

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What keeps the particles of a liquid from spreading out to fill an entire container in the same way that gas particles do?
Sonbull [250]

b. the forces of attraction among them limit their motion.


7 0
4 years ago
Read 2 more answers
In a science fiction story, a microscopic black hole is given an enormous positive charge by firing an un-neutralized ion drive
Olegator [25]

Answer: distance d = 4.73e10m

Explanation: Suppose the charge on the black hole is 5740 C which is a positive charge.

Using electric potential V formula:

V = kq / d

Where K = 9.05×10^9Nm^2/C

And e = 1.6×10^-19C

But you don't need to substitute it.

1090 V = 8.99e9N·m²/C² * 5740C /d

Make d the subject of formula

d = 4.73e10 m

6 0
3 years ago
A 75Kg man jumps from a window 1.0m above the sidewalk. If the man falls with his knees and ankles locked, the only cushion for
liq [111]

Answer:

150153.06122 N

Explanation:

m = Mass of person = 75 kg

h = Height of fall = 1 m

g = Acceleration due to gravity = 9.81 m/s²

F = Force

s = Displacement = 0.49 cm

Potential energy is given by

P=mgh\\\Rightarrow P=75\times 9.81\times 1\\\Rightarrow P=735.75\ J

Work is given by

W=Fs\\\Rightarrow F=\frac{W}{s}\\\Rightarrow F=\frac{735.75}{0.0049}\\\Rightarrow F=150153.06122\ N

The average force exerted is 150153.06122 N

8 0
3 years ago
Time period from one noon to the next
matrenka [14]
That's the period of time known as one solar "day". We subdivide it into 24 slices which we call "hours". Using this system of time units, the day is about 4 minutes longer than one complete axial rotation of the Earth.
3 0
3 years ago
Which of the following is a form of potential energy? O A. Sound energy O B. Elastic energy O C. Light energy O O O D. Kinetic e
olga55 [171]

Answer:

O C. Light energy

Explanation:

it conducts energy in it and is an energy itself.

6 0
3 years ago
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