All categories

3 years ago

Water is used to cool down automobile engines when they get hot. Why is water used as a coolant?

Physics

2 answers:

Rzqust [24]3 years ago

3 0

The answer is D) <span>Water has a high heat capacity.</span>

Lerok [7]3 years ago

3 0

Explanation :

Water is used to cool down automobile engines when they get hot. It is used as a coolant because it has a high heat capacity. It is approximately equal to $4.186\ J/g\ ^0C$ .

The heat capacity of a substance is defined as the change in temperature due to the addition and removal of heat. Its SI unit is joule per kelvin. It is also an extensive property of matter.

The specific heat of water shows that each gram of water can absorb or release 4.186 joules of heat.

In the case of water, it will soak up a large amount of heat and its do not increase by very large amount.

So, the correct option is (d) "Water has a high heat capacity".

You might be interested in

Electromagnetic wav

krek1111 [17]

Answer:

I dont get what your asking sorry boo

Explanation:

6 0

3 years ago

Read 2 more answers

As a cat pounces on a mouse, its muscles consume 10 units of potential energy (which the cat previously gained from the food it

taurus [48]

6 units of energy were transferred into heat.

7 0

3 years ago

A proton and an alpha particle are momentarily at rest at adistance r from each other. They then begin to move apart.Find the sp

Arte-miy333 [17]

Answer:

The unknown quantities are:

E and F

The final velocity of the proton is:

√(8/3) k e^2/(m*r)

Explanation:

Hello!

We can solve this problem using conservation of energy and momentum.

Since both particles are at rest at the beginning, the initial energy and momentum are:

Ei = k (q1q2)/r

pi = 0

where k is the coulomb constant (= 8.987×10⁹ N·m²/C²)

and q1 = e and q2 = 2e

When the distance between the particles doubles, the energy and momentum are:

Ef = k (q1q2)/2r + (1/2)m1v1^2 + (1/2)m2v2^2

pf = m1v1 + m2v2

with m1 = m, m2 = 4m, v1=vf_p, v2 = vf_alpha

The conservation momentum states that:

pi = pf

Therefore:

m1v1 + m2v2 = 0

That is:

v2 = (1/4) v1

The conservation of energy states that:

Ei = Ef

Therefore:

k (q1q2)/r = k (q1q2)/2r + (1/2)m1v1^2 + (1/2)m2v2^2

Replacing

m1 = m, m2 = 4m, q1 = e, q2 = 2e

and v2 = (1/4)v1

We get:

(1/2)mv1^2 = k e^2/r + (1/2)4m(v1/4)^2 = k e^2/r + (1/8)mv1^2

(3/8) mv1^2 = k e^2/r

v1^2 = (8/3) k e^2/(m*r)

3 0

3 years ago

Your town is installing a fountain in the main square. If the water is to rise 28.0 m (91.8 feet) above the fountain, how much p

PilotLPTM [1.2K]

Explanation:

Given that,

The water is to rise to a height of 28 meters. Let P is pressure must the water have as it moves slowly toward the nozzle that sprays it up into the air.

We know that, the atmospheric pressure is : $P_a=10^5\ Pa$

P can be calculated as :

$P=P_a+d\times g\times h$

$P=10^5+1000\times 9.81\times 28$

P = 374680 Pa

So, the pressure of 374680 Pascal must the water have as it moves slowly toward the nozzle that sprays it up into the air. Hence, this is the required solution.

4 0

4 years ago

you can make a smoothie in a blender with a power of 400 W and an efficiency of 85% how much energy is actually being used to ma

bixtya [17]

1200 watt seconds
1.2. Kw seconds
1.2/ 3600 KWh

5 0

3 years ago