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4 years ago

Only about 36% of the energy from petrol is used to move a car. What happens to the rest of it?

1 answer:

6 0

Hmm not sure that math is correct but we must remember that energy is never destroyed just transferred. E.g light energy is transferred into heat. So when looking at a car we have
1.friction energy. This is the car running alone the road and wind.
2. Kentic energy. This is the car moving.
3.heat energy. When petrol combust it produces heat energy.

You might be interested in

What is the ratio of the gravitational pull of the sun on the moon to that of the earth on the moon? (assume the distance of the

professor190 [17]

Acceleration of Gravity Sun-Moon System

G = 6.67260E-11 m^3/(kg sec^2)
m1 = mass of Sun = 1.989E+30 kg
m2 = mass of Moon = 7.3476E+22 kg
r = distance between Sun and Moon = distance between Sun and Earth - distance between Earth and Moon = 149,600,000 km - 384,400 km

<span>g = 0.00596 m/s^2</span>

5 0

3 years ago

An 80 kg skateboarder moving at 3 m/s pushes off with her back foot to move faster. If her velocity increases to 5 m/s, what is

Serga [27]

Answer:

640 J

Explanation:

ΔKE = KE − KE₀

ΔKE = ½ mv² − ½ mv₀²

ΔKE = ½ m (v² − v₀²)

ΔKE = ½ (80 kg) ((5 m/s)² − (3 m/s)²)

ΔKE = 640 J

Her kinetic energy increases by 640 J, so she does 640 J of work.

3 0

3 years ago

A perceived increase in the volume of sound is best explained by ________.

tatiyna

Answer:

A. an increase in the height of the sound wave

Explanation:

Volume of the sound is measured by its intensity

So here we know that

intensity is directly depends on the square of the amplitude of the sound wave

so here as intensity depends on the loudness of the sound given as

$L = 10 Log(\frac{I}{I_o})$

so here as the loudness of sound will increase then the intensity will increase and hence the amplitude of the sound will also increase

So correct answer will be

A. an increase in the height of the sound wave

8 0

3 years ago

an object moves 15.0 m north and then 11.0 m south. find both the distance it has traveled and the magnitude of its displacement

Naddika [18.5K]

Distance is 15 m + 11 m =26 m
Displacement is North 15 - 11 south= 4 m north.

7 0

2 years ago

The principal quantum number is given the symbol and has positive, whole-number values starting from?

deff fn [24]

Answer:

Principal quantum numbers are denoted by the symbol 'n'. They designate the principal electron shell of the atom. The positive whole number values starting from 1,2,3 and so on..

Explanation:

All orbitals that have the same value of n are said to be in the same shell (level). For a hydrogen atom with n=1, the electron is in its ground state; if the electron is in the n=2 orbital, it is in an excited state. The total number of orbitals for a given n value is n2.

6 0

2 years ago