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3 years ago

To calculate how much rest energy an object contains, you multiply

Physics

1 answer:

Rina8888 [55]3 years ago

5 0

This is what e=mc² means.
So rest energy is RH side of equation that is its mass times speed of light squared.

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How is the number 15,000 written in scientific notation?

morpeh [17]

Answer:

Correct answer: D. 1.5 · 10⁴

Explanation:

Extremely large or extremely small numbers are written in the form

r · 10ⁿ

where r is a one-digit number in decimal notation and has values from 1 to 9

and n has values ±1, ±2, ±3 .........

God is with you!!!

6 0

3 years ago

Assume that the force exerted on each crutch by the ground is directed along the crutch, as the force vectors in the drawing ind

olya-2409 [2.1K]

Answer: 43 degrees

Explanation:

The force of the crutch can be broken into components. The horizontal component of F is the static friction force keeping the crutch from sliding. The vertical component is opposing the weight and is the Normal force. Using the orientation of the angle q, we have the following

fs = Fx = F sin (angle (tita))

N = Fy = F cos (angle(tita))

Maximum angle implies maximum static friction

Therefore,

fsmax = UsN = Us x F cos(angle tita)

Where U = miyu

F sin(angle tita) = Us x Fcos (angle tita)

Sin (angle tita) / cos (angle tita) = Us

Therefore, tan (angle tita) = Us

Angle tita = tan^-1(Us) = tan^-1 (0.931) = 42.95 degrees = 43 degrees

There for Angle tita Max = 43 degrees

7 0

3 years ago

A. Blue light has higher energy than red light. Write 3 - 4 sentences comparing these electromagnetic waves with respect to the

frosja888 [35]

PART A)

As we know that energy of light depends on its wavelength and frequency as following formula

$E = \frac{hc}{\lambda} = h\nu$

now we know that wavelength of blue light is less than the red light so here energy of blue light will be more

also we know that

$\nu = \frac{c}{\lambda}$

so here if wavelength is smaller for blue light so its frequency will be high and the speed of both light will be same in same medium

PART B)

Since we know that frequency of blue light is more than red light as well as wavelength of blue light is less than the wavelength of blue light so here blue light will have more energy

When blue light and red light strike the metal surface then due to more energy of blue light it will release some loosely bonded electrons from metal surface which will contribute in current.

here if we increase the intensity of light then the number of photons that contain the blue light of certain energy will be more and that will contribute more current

So here quantification help as we know that due to quantization only certain frequency or energy will lead to eject electron so all colours will not give this current

5 0

2 years ago

Read 2 more answers

What level (high, low, or medium) is cumulonimbus at?

Nataly_w [17]

Cumulonimbus clouds are at a high level in the sky

7 0

3 years ago

2. The length of a day is based on the amount of time that

Serjik [45]

Answer:

the answer is B: earth takes to rotate once on its axis

6 0

3 years ago