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umka21 [38]
3 years ago
12

It is a cool winter evening, and you are feelinga little chilled. To warm yourself up, you sipsome warm tea. As you swallow, you

can feelthe tea warm your mouth and throat. This teais warming you up by the process of:
A. conduction.
B. convection.
C. radiation.
D. induction.
Physics
1 answer:
frosja888 [35]3 years ago
6 0

Answer:

The tea is warming up us is because of process of convection.

Explanation:

The conduction is the process in which the heat transfers within the material like heating up metal rod.

The radiation can be defined transfer of energy from body in the form of particles or wave like radiation from nuclear bomb.

The convection is the process of heat transfer by the movement of warm gas or liquid in which warm air rise and cool air sink.

Here when tea when we swallow tea the motion of molecules in the tea rise and there is transfer of heat.

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F=m*(v^2/r)

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You are looking down on a N = 9 turn coil in a magnetic field B = 0.5 T which points directly down into the screen. If the diame
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Answer:

The magnitude of the voltage is 2.27\times10^{-4}\ V and the direction of the current is clockwise.

Explanation:

Given that,

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\phi=9\times\pi\times(1.5\times10^{-2})^2\times0.5

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Using formula of emf

\epsilon=-\dfrac{d\phi}{dt}

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\epsilon =-0.000227\ V

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Hence, The magnitude of the voltage is 2.27\times10^{-4}\ V and the direction of the current is clockwise.

8 0
3 years ago
Much power does a 10 Ohm bulb have in a series circuit with a battery of 12V and nothing else in the the circuit?
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Answer:

it will be d) 14.4W

Explanation:

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now, we know

=》

power =  \frac{v {}^{2} }{r}

=》

power \:  =  \frac{12 {}^{2} }{10}

=》

power =  \frac{144}{10}

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A flashlight does that.
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What is the minimum speed needed to fire a champagne cork a distance of 11m?
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To start with solving this problem, let us assume a launch angle of 45 degrees since that gives out the maximum range for given initial speed. Also assuming that it was launched at ground level since no initial height was given. Using g = 9.8 m/s^2, the initial velocity is calculated using the formula:

(v sinθ)^2 = (v0 sinθ)^2 – 2 g d

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3 years ago
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