4 years ago

I WILL MARK BRAINLIEST

1 answer:

4 0

Sound waves require a medium. For example - think about space. there is no air or liquid because it is a vacuum, which is why sounds don’t travel through space.

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When did diesel locomotives replace steam locomotives?

liubo4ka [24]

To keep the energy going every day

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4 years ago

Based on the law of conversation of energy how can we reasonably improve a machines ability to do work?

tensa zangetsu [6.8K]

MARK ME BRAINLIEST!!

your answer should be “C”.

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3 years ago

Two equal charges with magnitude Q and Q experience a force of 12.3442 when held at a distance r. What is the force between two

Pepsi [2]

Answer:197.504 N

Explanation:

Given

Two Charges with magnitude Q experience a force of 12.344 N

at distance r

and we know Electrostatic force is given

$F=\frac{kq_1q_2}{r^2}$

$F=\frac{kQ\cdot Q}{r^2}$

$F=\frac{kQ^2}{r^2}$

Now the magnitude of charge is 2Q and is at a distance of $\frac{r}{2}$

$F'=\frac{k2Q\cdot 2Q}{\frac{r^2}{2^2}}$

F'=16F

F'=197.504 N

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3 years ago

Which of the following will cause a decrease in an object's weight? Increase in the mass of the object Decrease in the mass of t

Paul [167]

A decrease in mass will decrease an objects weight because
weight = mass x gravitational constant

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3 years ago

Read 2 more answers

When a golf ball is hit, it travels at 41 meters per second. The mass of a golf ball is 0.045kg. Calculate the kinetic energy of

Fittoniya [83]

Answer:

75.645 J

Explanation:

The kinetic energy is related to the mass and velocity by the formula ...

KE = 1/2mv²

For the given mass of 0.045 kg, and velocity of 41 m/s, the kinetic energy is ...

KE = 1/2(0.045 kg)(41 m/s)² = 75.645 J

The unit of energy, joule, is a derived unit equal to 1 kg·m²/s².

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2 years ago