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7nadin3 [17]
3 years ago
12

Work done by friction?

Physics
2 answers:
Tomtit [17]3 years ago
8 0

increase kinetic energy of body

Alborosie3 years ago
8 0

Answer:

yes it increases kinetic energy of body on which it is applying it also cause heat loss

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Confusing, fill the venn diagram?
Irina18 [472]

Answer:

electromagnetic waves= LIGHT, TRAVELS IN A VACUUM, VIBRATIONS IN MAGNETIC FIELD

matter/mechanical= REQUIRES A MEDIUM, SOUND, COMPRESSIONS,

both= TRANSFERS ENERGY, AMPLITUDE, FREQUENCY, WAVELENGTH,

Explanation:

electromagnetic waves don't need particles/atoms to travel through whilst matter/mechanical waves do.

4 0
3 years ago
300 grams of ethanol is heated with 14640 Joules of energy to reach a final temperature of 30 °C. What was the initial temperatu
levacccp [35]

Answer:

10 °C

Explanation:

Applying

q = cm(t₂-t₁)............... Equation 2

Where q = heat energy, c = specific heat of ethanol, m = mass of ethanol, t₁ = initial temperature, t₂ = Final temperature.

Given: c = 2.44 J/g.°C,  m = 300 g, q = 14640 J, t₂ = 30°C

Substitute into equation 2 and solve for t₁

14640 = 2.44×300(30-t₁)

14640 = 732(30-t₁)

732(30-t₁) = 14640

(30-t₁)  = 14640/732

(30-t₁)  = 20

t₁ = 30-20

t₁ = 10 °C

6 0
2 years ago
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The thermal energy in a heat engine is used to move a piston. Which best describes why this is possible?
fiasKO [112]
Hot air always goes for the top of air and its making pressure on piston which makes piston move up.
3 0
3 years ago
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Based on Archimedes' principle, we know that if an object displaces a given weight of water, then the object is being buoyed up
Virty [35]
True. If the amount displaced is more than the mass, it floats. If the amount is less than the mass, it will sink.
8 0
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What is the name for the bunched up region of<br> air particles in the sound wave?
Leviafan [203]

Answer:

These regions are known as compressions and rarefactions respectively. The compressions are regions of high air pressure while the rarefactions are regions of low air pressure.

Explanation:

4 0
3 years ago
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