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3 years ago

I need help ASAP!!!! Which diagram BEST represents a convection heating current?

Physics

2 answers:

Marina86 [1]3 years ago

5 0

Its the first one with the circle and the arrows going around it

kozerog [31]3 years ago

3 0

The answer is the circle. I just took the test hope this helps. :)

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You are given the melting points of three unknown substances and are asked to predict which one is an ionic compound. You would

vovangra [49]

To identify which one is ionic compound, you would select the compound with the high melting point. Ionic compounds<span> have high </span>melting points<span> because the electrostatic interactions that hold the compounds together are very strong. Hope this answers the question.</span>

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3 years ago

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An inductive circuit contains resistance of 20 ohm and an inductance of 20 H. If an ac voltage of 120 V and frequency 60 Hz is a

elena-s [515]

Answer:

answer : option (b) 0.016 amp

explanation : resistance of resistor , R = 10 Ω

inductance of inductor , X_LX

= 20H

voltage of AC circuit , V = 120volts

frequency, ff =60Hz

so, angular frequency, \omega=2\pi fω=2πf = 2 × π × 60 = 120π rad/s

now, current , i=\frac{V}{\sqrt{R^2+\omega^2L^2}}i=

+ω

= 120/√{10² + (120π)² × 20²}

= 120/√{100 + 14400π² × 400}

after solving this we get, i = 0.016 amp

8 0

3 years ago

What factor has the greatest impact on flexibility?

hjlf

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3 years ago

Which law describes how the Earth applies a gravitational force on the Moon, the Moon applies a gravitational force on Earth? *

nikdorinn [45]

The answer is Newton's 3rd Law. The reason why is because a force is a push or a pull that acts upon an object as a results of its interaction with another object. ... These two forces are called action and reaction forces and are the subject ofNewton's third law of motion. Formally stated, Newton's third law is: For every action, there is an equal and opposite reaction.

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3 years ago

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Definition of wave velocity

maksim [4K]

Answer:

Velocity = frequency * wave length

Explanation:

Wave velocity is the measure of how fast the wave is being transmitted to a particular direction.

velocity implies both speed and direction as we know.

The velocity of a wave is equal to the product of its wavelength and frequency

where

frequency - number of oscillations per unit time (measured in Hz)
wave length - distance between corresponding points of two consecutive waves (measured in meters)

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3 years ago

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