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Dmitrij [34]
2 years ago
6

a car mass 1500kg traveling at a uniform velocity of 30 m/s due east .the driver applies the brake to slow down the car to a vel

ocity of 10 m/s east . what is the work done in slowing down the car ?
Physics
1 answer:
bonufazy [111]2 years ago
3 0

Answer:

this is the answer

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Explain why the rust of an iron bar decreases the strength of the bar.
garri49 [273]
Rusting is a chemical change, which forms a new substance which is brittle. A solid that is formed by a chemical reaction.
7 0
3 years ago
Two protons move at speed v, one along the x axis and one along the y axis. What is the relative speed of the two protons? Evalu
forsale [732]

Answer:

0.85 c

Explanation:

When the two travel at right angles to each other , their relative velocity is given by the hypotenuse formed by the x and y direction velocities.

Relative velocity of the two protons is  given as

\sqrt{v^{2}+v^{2}} = (\sqrt{2} ) v

If v = 3/5 c , then the relative speed = \sqrt{2} (3/5c) =0.85 c

8 0
3 years ago
Which statements describe the Mercalli scale? Check all that apply.
konstantin123 [22]
<h3><u>Full question:</u></h3>

Which statements describe the Mercalli scale? Check all that apply.

A. This scale measures seismic waves based on their size.

B. This scale rates an earthquake according to how much damage it causes.

C.This scale produces a single rating for earthquakes that reach the surface.

D. This scale uses Roman numerals to rank the damage caused by an earthquake.

E.This scale measures the magnitude of an earthquake based on the size of seismic waves.

<h3><u>Answer:</u></h3>

The Mercalli scale : This scale rates an earthquake according to how much damage it causes and This scale uses Roman numerals to rank the damage caused by an earthquake.

<h3><u>Explanation:</u></h3>

The Modified Mercalli scale is intended to illustrate the consequences of an earthquake, at a contracted station, on tangible characteristics, on modern fittings and human beings.

The Modified Mercalli Intensity value ascribed to a particular site subsequent an earthquake has an extra significant means of severity to the nonscientist than the magnitude because intensity assigns to the outcomes really encountered at that position. This scale is comprised of 12 growing levels of intensity, denoted by Roman numerals, arranging from gradual shaking to catastrophic impairment.

3 0
3 years ago
What is the pH of a neutral substance?
jekas [21]

Answer:

7

Explanation:

7 0
3 years ago
In electronics, the formula V = IR is called Ohm's Law. It gives the relationship in a circuit between the voltage V (in volts),
Tomtit [17]

Answer:

3+2i ohm.

Explanation:

Here we have a complex number operation. According to Ohm's law V=I*R, so:

R=\frac{V}{I}\\\\R=\frac{21+i}{5-3i}

we need to remove the complex number on the denominator, so we have to multiply by its complement on both side

R=\frac{21+i}{5-3i}*\frac{5+3i}{5+3i}

that gives us:

R=\frac{102+68i}{34}=3+2i

6 0
3 years ago
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