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3 years ago

The freezing point of water is the same as its

Physics

2 answers:

Setler [38]3 years ago

8 0

(a): melting, ice melts at the same point where water freezes

denis23 [38]3 years ago

8 0

Answer:

A. Melting point

Explanation

Melting point is the point of temperature at which solid changes it's state to liquid while freezing point is the point of temperature at which liquid changes it's state to solid.

Melting and freezing point of water is same i.e. 0 degree centigrade and at this temperature 80 calories of heat per gram of solid ice will convert it into liquid water.

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If the current density in a wire or radius R is given by J-k+5,0F wire? R, what is the current in the wire?

Deffense [45]

Answer:

I = $R^{2}$ (K+5)

Explanation:

Given :

J = k+5

Now selecting a thin ring in the wire of radius "r" and thickness dr.

Current through the thin ring is

dI = J X 2πrdr

dI = (K+5) x 2πrdr

Now integrating we get

I = $\int_{0}^{R} = (K+5).2\pi rdr$

I = (K+5) 2π $\int_{0}^{R} rdr$

I = (K+5) 2π $\frac{R^{2}}{2}$

I = $R^{2}$ (K+5)

8 0

3 years ago

Power is work done over a what?

melomori [17]

No the answer is energy

4 0

3 years ago

the tallest man made structure At present is theWarszawa radio massin Warsaw Poland.This radio mast rises 646m above ground near

PtichkaEL [24]

All of that fluff at the beginning is interesting, but completely irrelevant
to the question. The question is just asking for the mass of an object
that weighs 3.6N on Earth.

Weight = (mass) x (acceleration of gravity)

3.6N = (mass) x (9.8 m/s²)

Divide each side
by 9.8 m/s : Mass = 3.6N / 9.8 m/s² = <em>0.367 kilogram</em> (rounded)

7 0

2 years ago

If a car has a mass of 200 kilograms and produces a force of 500 N, how fast will the car accelerate?

san4es73 [151]

Answer:

Explanation:

F = ma

500N = 200 × a

200a. = 500N

a. =. 500N/200

a. =. 2.5m/s²

PLEASE GIVE BRAINLIEST.

3 0

2 years ago

a load of 800 newton is lifted by an effort of 200 Newton. if the load is placed at a distance of 10 cm from the fulcrum. what w

nataly862011 [7]

Answer:

40 cm

Explanation:

We are given that

Load=800 N

Effort=200 N

Load distance=10 cm

We have to find the effort distance.

We know that

$load\times load\;distance=Effort\times effort\;distance$

Using the formula

$800\times 10=200\times effort\;distance$

Effort distance= $\frac{800\times 10}{200}$

Effort distance= $\frac{8000}{200}$

Effort distance=40 cm

Hence, the effort distance will be 40 cm.

7 0

2 years ago