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3 years ago

What is the unit of measurement for power? A. m/s2 B. watts C. joules D. newtons

Physics

1 answer:

anyanavicka [17]3 years ago

8 0

Power is the rate of doing work or using energy.

The unit of power is the watt.

1 watt = 1 joule per second

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Distinguish between refraction,reflection and total internal reflection

Ipatiy [6.2K]

The contrast between total internal reflection and refraction is that total internal reflection is the full underwater build with no defeat of brightness, whereas refraction is the shift in the path of a tide that is parting from one medium to another.

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2 years ago

Momentum usually has the symbol p It is a vector, What is the correct way to

Nadya [2.5K]

Answer:

Add an arrow above the symbol p to show it is a vector. Sometimes it is italicized in textbooks.

Explanation:

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3 years ago

Two long, parallel wires are separated by a distance of 2.00 cm . The force per unit length that each wire exerts on the other i

RUDIKE [14]

Answer:

a) current in the second wire is 5.60A

b) opposite directions

Explanation:

a) We need to find the current of wire, the magnitude of the force per unit length between the two wires carrying current I and I¹ is given by

$\frac{F}{L} = \frac{U_0I^1}{2\pi r} \\\\I^1 = \frac{F2\pi r}{LU_0I}$

$= (3.6 * 10^-^5)\frac{2\pi (0.02)}{4\pi * 10^-^7)(0.64)} \\= 5.60A$

b) knowing that for a two parallel conductor carrying current in the same direction attracts each other, and for a two parallel conductors carrying carying current in opposite direction repels eachother.

therefore, since the two wire repel each other then the current in the second wire must flow in the opposite direction of the current in the first wire.

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4 years ago

What has more thermal energy? A giant, frozen iceberg or a swimming pool filled with boiling water? Explain.

padilas [110]

Boiling water has a lot more heat than the oven's air (even though the air has a higher temperature). ... A match has a greater temperature than the iceberg because the average molecule in the match is moving faster than the average molecule in the iceberg

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3 years ago

Which one is correct:

alisha [4.7K]

Answer:

Option (c) is correct.

Explanation:

Acceleration of an object is given by the formula as follows :

$a=\dfrac{v-u}{t}$

Where

u and v are initial and final velocity

t is time

(v-u) is also called the change in velocity

So, the acceleration of an object is equal to the rate of change of velocity. Hence, the correct option is (c) " Change in its velocity divided by the change in time".

3 0

3 years ago