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Ostrovityanka [42]
2 years ago
14

A student wishes to conduct an investigation on heat transfer that demonstrates convection, Which

Physics
1 answer:
Arte-miy333 [17]2 years ago
3 0
It’s D your answer is D because
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the radius of the tires on a particular vehicle 0.62m if the tires are rotating 5 times per second, what is the velocity of the
tankabanditka [31]
Circumference of the tire = (2 pi) x (radius)

                                     =  (2 pi) x (0.62 meter)

                                     =    3.9 meters

If the tire never slips or skids, then the speed of the vehicle is

             speed  =  (distance)  /  (time to cover the distance)

                       =  (5 x 3.9 meters)  /  1 second

                       =     19.48 meters/second   .

                    (about 43.6 miles per hour)  .

We can't say anything about the vehicle's velocity, because we have
no information about the direction in which it's heading.
8 0
3 years ago
PLEASE HELP!!! GIVING BRAINLIEST!! ill also answer questions that you have posted if you answer these correctly!!!! (40pts)
Sunny_sXe [5.5K]

friction make non moving objects starts to move

  • true

there are different types of force which may help them to move

3 0
3 years ago
A uniformly charged sphere has a potential on its surface of 450 V. At a radial distance of 7.2 m from this surface, the potenti
Yakvenalex [24]

Answer:

The radius of the sphere is 3.6 m.

Explanation:

Given that,

Potential of first sphere = 450 V

Radial distance = 7.2 m

If the potential of sphere =150 V

We need to calculate the radius

Using formula for potential

For 450 V

V=\dfrac{kQ}{r}

450=\dfrac{kQ}{r}....(I)

For 150 V

150=\dfrac{kQ}{r+7.2}....(II)

Divided equation (I) by equation (II)

\dfrac{450}{150}=\dfrac{\dfrac{kQ}{r}}{\dfrac{kQ}{r+7.2}}

3=\dfrac{(r+7.2)}{r}

3r=r+7.2

r=\dfrac{7.2}{2}

r=3.6\ m

Hence, The radius of the sphere is 3.6 m.

3 0
3 years ago
An imbalance of _____________ causes an object to be charged.
dezoksy [38]
An imbalance of electrons causes an object to be charged. A charged substance is one that has a net charge that is not zero. If the number of protons and that of electrons is equal in an object, the object is not neutral, but it has zero charge. Loss or gain of electrons determine the charge of an object, when an object loses electrons it becomes positively charged, but when it gains electrons it becomes negatively charged.
5 0
3 years ago
Explain Rutherford's experiment?
Ipatiy [6.2K]

Answer:

Rutherford bombarded aluminum foil with beam of light known as alpha particles. The mass of this alpha particle is equivalent to helium atom.

Explanation:

Rutherford bombarded aluminum foil with beam of light known as alpha particles. The mass of this alpha particle is equivalent to helium atom.

When this alpha particles were made to strike the aluminum foil, some passed through the foil, some were reflected and speed others changed.

The ones reflected encountered heavier particle known as the nucleus, preventing them from passing through it. The whole observations indicated that atom is not is uniformly charged sphere as proposed by J.J Thomson.

Rutherford proposed new model known as the Planetary model of atom, which described atom as containing a nucleus which is revolved by electron, just like planets revolve round the sun. And this nucleus contains opposite charge to electron which is proton, to balance the motion.

7 0
3 years ago
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