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svetlana [45]
3 years ago
9

To calculate the heat needed to boil a pot of water at 100C, what do you need to know? A. the mass and latent heat of fusion B.

the mass and amount of work done C. the mass and latent heat of vaporization D. the mass, temperature change, and specific heat capacity
Physics
2 answers:
Free_Kalibri [48]3 years ago
5 0

Answer: D. The mass, temperature change, and specific heat capacity

Explanation:

The answer is D. The mass, temperature change, and specific heat capacity.

vlabodo [156]3 years ago
4 0
At boiling point :

H = mL

Where m = mass, L =specific latent heat

So from the formula for boiling, you need to know the mass and specific latent heat of vaporization

C. is the best answer.
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soldi70 [24.7K]

Answer:

The two forces that affect on the pendulum are the force of gravity,

Explanation:

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4 0
3 years ago
What is the wavelength (in air) of a 13.0 khz vlf radio wave?
bonufazy [111]
Since,
Speed = Frequency * WaveLength

=> WaveLength = Speed / Frequency --- (A)

Frequency = 13.0 kHz.
As the radio waves are electromagnetic waves, their speed is equals to the speed of light. Therefore,
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Plug in the values in equation(A):

A => WaveLength = \frac{3 * 10^{8}}{13*10^{3}}

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3 years ago
Delivery trucks that operate by making use of energy stored in a rotating flywheel have been used in Europe. The trucks are char
Marta_Voda [28]

Answer:

KE = 2.535 x 10⁷ Joules

Explanation:

given,

angular speed of the fly wheel = 940 rad/s

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radius = 1.35 m

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moment of inertia of the cylinder

I = \dfrac{1}{2}mr^2

 =\dfrac{1}{2}\times 630\times 1.35^2

 = 574 kg m²

kinetic energy of the fly wheel

KE = \dfrac{1}{2}I\omega^2

KE =\dfrac{1}{2}\times 574\times 940^2

KE = 2.535 x 10⁷ Joules

the kinetic energy of the flywheel is equal to KE = 2.535 x 10⁷ Joules

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