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Sonbull [250]
2 years ago
10

The standard unit of brightness is called the candela. True False

Physics
1 answer:
Westkost [7]2 years ago
3 0

Answer:

TRUE

Explanation:

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How many neutrons are present in an atom of Iron-54
Flura [38]

there are 28 neutrons present

3 0
3 years ago
A man pushing a crate of mass
marin [14]

(a) The magnitude and direction of the net force on the crate while it is on the rough surface is 36.46 N, opposite as the motion of the crate.

(b) The net work done on the crate while it is on the rough surface is 23.7 J.

(c) The speed of the crate when it reaches the end of the rough surface is 0.45 m/s.

<h3>Magnitude of net force on the crate</h3>

F(net) = F - μFf

F(net) = 280 - 0.351(92 x 9.8)

F(net) = -36.46 N

<h3>Net work done on the crate</h3>

W = F(net) x L

W = -36.46 x 0.65

W = - 23.7 J

<h3>Acceleration of the crate</h3>

a = F(net)/m

a = -36.46/92

a = - 0.396 m/s²

<h3>Speed of the crate</h3>

v² = u² + 2as

v² = 0.845² + 2(-0.396)(0.65)

v² = 0.199

v = √0.199

v = 0.45 m/s

Thus, the magnitude and direction of the net force on the crate while it is on the rough surface is 36.46 N, opposite as the motion of the crate.

The net work done on the crate while it is on the rough surface is 23.7 J.

The speed of the crate when it reaches the end of the rough surface is 0.45 m/s.

Learn more about work done here: brainly.com/question/8119756

#SPJ1

7 0
1 year ago
The accuracy of a series of measurements is best understood by looking at the
bonufazy [111]

The accuracy of a series of measurements is best understood by looking at the known value.

The values obtained in a series of measurement can be precise or accurate.

The precision of the measurement is obtained by looking at the trend of the values obtained.

  • If the values are close to each other, the measurement is precise but if the values are far from each other, the measurement is not precise.

The accuracy of a measurement is determine by comparing the determine value against a known value.

  • If the measured value is close to a <em>known value</em>, then the measurement is accurate, but if the measured value is from from a known value then the measurement is not accurate.

Thus, the accuracy of a series of measurements is best understood by looking at the known value.

Learn more here: brainly.com/question/13688896

4 0
2 years ago
What will be the final velocity of a 5.0 g bullet starting from rest, if a net force of 45 N is
djverab [1.8K]

The net force performs a total amount of work equal to

(45 N) (0.80 m) = 36 J

on the bullet, and this is in turn is equal to the change in the bullet's kinetic energy by the work-energy theorem. So we have

W = ∆K = 1/2 mv²

since the bullet starts at rest, where m = its mass and v = its final velocity.

Solve for v :

36 J = 1/2 (0.0050 kg) v²   ⇒   v = 120 m/s

5 0
1 year ago
What type of energy is released when a proton is nocked out of an atoms nucleus?
yarga [219]
I think it would be atomic energy, which would most likely be in very short waves to affect the protons.
3 0
3 years ago
Read 2 more answers
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