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3 years ago

How heat is conducted along a metal bar?

Physics

2 answers:

amm18123 years ago

4 0

Answer:

Explanation:

When something is heated, its atoms vibrate. If one end of a metal bar is heated, the atoms at that end vibrate more than the atoms at the cold end. The vibration spreads along the bar from atom to atom. The spread of heat in this way is called conduction. Metals are good conductors of heat.

nikdorinn [45]3 years ago

3 0

Answer:

If one end of a metal bar is heated, the atoms at that end vibrate more than the atoms at the cold end. The vibration spreads along the bar from atom to atom.

Explanation:

The spread of heat in this way is called conduction. Metals are good conductors of heat.

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A professor sits on a rotating stool that is spinning at 10.0 rpm while she holds a heavy weight in each of her hands. Her outst

MAVERICK [17]

Answer:

0.5864 m

Explanation:

$r_1$ = 0.705 m

$\omega_1$ = 10 rpm

$\omega_2$ = 20.5 rpm

$\left(m r_{1}^{2}\right) \omega_{1} &=\left(m r_{2}^{2}\right) \omega_{2}$

$r_{2}^{2} &=\frac{\left(m r_{1}^{2}\right) \omega_{1}}{\left(\omega_{2}\right)}$

$=\frac{\left(r_{1}^{2}\right) \omega_{1}}{\left(\omega_{2}\right)}$

$=\frac{\left((0.705 \mathrm{m})^{2}\right)(10 \mathrm{rpm})}{(20.5 \mathrm{rpm})}$

$=\sqrt{\frac{\left((0.705 \mathrm{m})^{2}\right)(10 \mathrm{rpm})}{(20.5 \mathrm{rpm})}}$

$r_{2} =0.5864\ m$

The weights are 0.5864 m apart.

7 0

4 years ago

George pushes a wheelbarrow for a distance of 12 meters at a constant speed for 35 seconds by applying a force of 20 newtons. Wh

sergeinik [125]

Since Power is equal to the product of Force and Displacement all over time, George needs 6.86 W of power to push the wheelbarrow. Power can also be calculated by multiplying Force applied on the object and the speed of the object being applied of the force.

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4 years ago

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A lens focuses light at a single point called the focal point. An illustration of a vertical converging lens with 5 parallel ray

djyliett [7]

Answer:

refraction

Explanation:

When waves, including light, pass through two media with different densities, the waves bend at the transition between the two media due to differences in speed and wavelength. Convex lenses bend (refract) light and concentrate it at one point called the focal point.

hope this helps

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3 years ago

Two Forces Of Magnitude 20N Each Are Acting At 30 And 60 degree with xAxis the Y Component Of The Resultant Force Is

vodka [1.7K]

We can find the y-component of the resultant force by adding the y-components of the two 20N forces.

For a force of magnitude F and lying at an angle off the x-axis θ, the y-component of the force is given by:

Fsin(θ)

The magnitude of the two forces is 20N, and they lie at 30° and 60°, so the sum of their y-components, and therefore the y-component of the resultant force, is:

20sin(30°)+20sin(60°)

= 27.3N

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4 years ago

What is the tendency of a material to oppose the flow of charge?

elena55 [62]

I think the answer is Resistance. If the link i posted int he comment is right.

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4 years ago