In power plants, generators convert mechanical energy into chemical energy.

Answers

Answer 1

Answer:

The statement “In power plants, generators convert mechanical energy into chemical energy” is false. It should be that the generator will convert chemical energy from the raw material such as fuel oil that it receives into mechanical energy to generate energy.

Answer 2

Answer:

Answer:

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The density of water is 1.00 g/cm3. The density of ethanol is 0.80 g/cm3. What is the volume of ethanol, in cm3 that has the same mass as 100 cm3 of water?

Answers

Explanation:

Given that,

The density of water is 1 g/cm³

The density of ethanol is 0.8 g/cm³

We need to find the volume of the ethanol that has the same mass as 100 cm³ of water.

Density=mass/volume

For water,

$d=(m)/(V)\n\nm=dV\n\nm=1\ g/cm^3* 100\ cm^3\n\nm=100\ g$

For ethanol,

$d=(m)/(V)\n\nV=(m)/(d)\n\nV=(100\ g)/(0.8\ g/cm^3)\n\nV=125\ cm^3$

Hence, 125 cm³ of ethanol has the same mass as 100 cm³ of water.

Answer:

1.00 g/cm3

Explanation:

Name human body organs where magnetism is significant

Answers

It has been hypothesized, and some studies have supported the conjecture,
that certain species of insects and birds are able to sense the direction of external
magnetic fields.

I don't think there is any such notion where human beings are concerned.

Is it possible for a population with a high birth rate to decrease in size.

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Sure, if the mortality (death) rate is even higher than the birth rate.

A train travels 225 kilometers in 2.5 hours. What is the train’s average speed?

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the train travells at he speed of 225 km/2.5h
now
225km=225000m
2.5 hr=150min=9000s
=>avg sp of train is=225000/9000s=25m/s

Answer:

562.5

Explanation:

A golf club with 65J of kinetic energy strikes a stationary golf ball with a mass of 46g. The energy transfer is only 20% efficient. Calculate the initial speed of the golf ball

Answers

The initial velocity of the ball is v = 23.8 m/s

How to find the initial speed?

We know that kinetic energy is given by:

KE = m*v²/2

Where m is the mass in kg, and we know that the energy transfer is 20% of the intial 65J, then we can write:

0.2*65 = (0.046)*v²/2

Solving this equation for v, the velocity, we get:

v = √[0.2*65*2/0.046]

v = 23.8 m/s

Learn more about kinetic energy:

brainly.com/question/8101588

#SPJ3

kinetic energy of golf club = 65J,
kinetic energy supplied to golf ball = 20% of 65 = 0.2 * 65 = 13J,
kinetic energy of ball = [mass * Velocity²]/2,
mass = 46gm = 0.046Kg,
[0.046 * V²]/2 = 13, or 0.046 *V² = 26,
V² = 26/0.046 = 565.22,
V = 23.77 m/sec = initial velocity of golf ball after hitting.

According to Newton's first law, massive objects have _____ inertia than small objects, which means it takes more force to move bigger things than smaller ones.

Answers

According to Newton's first law, massive objects have more inertia than small objects, which Means it takes more force to move bigger things than smaller ones.

According to Newton's first law, massive objects have more inertia than small objects, which means it takes more force to move bigger things than smaller ones.

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