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3 years ago

In your own words describe hot spot and the formation of the Hawaiian island

Physics

1 answer:

vesna_86 [32]3 years ago

6 0

The Hawaiian Island was formation by volcanic activity

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Two rocks of different masses are rolling down a hill at the same speed. Which rock (small one or big one) would have more kinet

aivan3 [116]

Answer:

Kinetic energy of bigger rock will be more than that of smaller one.

Explanation:

Kinetic energy of the rock is given by,

Kinetic energy = $\frac{1}{2} m v^{2}$

As velocity of both the rocks are same. Thus, kinetic energy is directly proportional to the mass of the rock

Kinetic energy ∝ mass

So, For greater mass kinetic energy will be greater and for smaller mass kinetic energy will be smaller.

Hence, Kinetic energy of bigger rock will be more than that of smaller one.

3 0

3 years ago

Read 2 more answers

What type of energy transformation is taking place when natural gas is used to heat water

bazaltina [42]

Thermal energy transformation is taking place.

3 0

3 years ago

If a wave vibrates up and down twice each second and travels a distance of 20 m each second and travels a distance of 20 m each

ivolga24 [154]

Answer:

Frequency is 0.5 Hz and the wave speed is 10 m/s.

Explanation:

As we know that frequency is defined as the how many times the no of cycles repeat in one second so if the wave is vibrating up and down twice during 1 second then the frequency in 1 second is

$f=\frac{1}{2} hz\\F=0.5hz$

Therefore frequency is 0.5 Hz.

Now the distance of wawe in each second is,

$d=20m$

Now the wave velocity is,

$v=fd$

Here, f is frequency, d is the distance, v is the wave velocity.

Substitute all the variables

$v=0.5\times 20\\v=10m/s$

Therefore the wave speed is 10 m/s.

6 0

2 years ago

Which molecule has a central carbon with four different components around it

sasho [114]

Methane

The many covalent bonds between the atoms in hydrocarbons store a great amount of energy, which releases when these molecules burn

3 0

3 years ago

Copper has a specific heat of 387 J/kg°C. A copper bullet is moving at 950 m/s. If the bullet is suddenly stopped so that all of

Alla [95]

Answer:

1196.02 °C

Explanation:

If the kinetic energy is converted into heat,

then,

Kinetic energy of the copper = heat energy of the copper

1/2m(v²) = cm(t₂-t₁)

where m = mass of copper, v = velocity of copper, c = specific heat capacity of copper, t₂ = final temperature of copper, t₁ = initial temperature of copper.

Since the mass of copper remains the same,

1/2v² = c(t₂-t₁)

make t₂ the subject of the equation

t₂ = 1/2(v²/c)+t₁..................... Equation 1

Given: v = 950 m/s, c = 387 J/kg°C, t₁ 30 °C

Substitute into equation 1

t₂ = 1/2(950²/387)+30

t₂ = 1196.02 °C

Hence the temperature the bullet reach before it was stopped = 1196.02 °C

8 0

3 years ago