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3 years ago

4. A weightlifter raises a mass mat a constant speed to a height h in time t. Which of the following

Physics

1 answer:

marishachu [46]3 years ago

3 0

Answer:

Explanation

The work done by the lifter is equal to its potential energy since he is covering a height and under the influence of gravity.

potential energy = mass * acceleration due to gravity * height

m is the mass

g is the acceleration due to gravity

h is the height

Hence the required workdone = PE = mgh

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Climate and weather are related but different. Which of the following describes the climate of a place?

iren2701 [21]

Climate. What does it mean?

Climate is a long-term weather, or recurring every time. Examples of climate? Every day, the desert is hot the day and cold in the night. This won't change, at least for hundreds, thousands, millions of years. This is climate.

Weather. What does it mean?

Weather is short-term, usually not recurring every time. Examples of weather? Today is very sunny. This will change-for all we know, tomorrow will be cloudy and rainy!

This is why your answer will NOT be a meteorologist predicts that tomorrow will be sunny and warm. This is weather, because it is only tomorrow.

This is why your answer will NOT be fertile soil makes farms in the region very productive. This does not relate to weather, or climate.

This is why your answer will NOT be the temperature dropped below freezing every night last week. This will only be "last week", not the week right now or the week after this week.

Therefore, your answer is "Thunderstorms frequently occur in the summer. This is because that's the climate in that part- thunderstorms always happen.

Brainliest?

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3 years ago

How are ions different from atoms

notka56 [123]

Atoms are always neutral it means, the number of Protons & electrons are equal in them whereas ions are charged, the number is different depends on the kind of charge

Hope this helps!

3 0

3 years ago

What causes light rays to bend ina new medium

Anon25 [30]

When light rays enter a new medium at an angle, the change in speed causes them to bend and change direction. ... They change the speed causes the ray to bend or change direction. When light slows down even more when it passes from water into glass.

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3 years ago

An alpha particle (charge = +2.0e) is sent at high speed toward a gold nucleus (charge = +79e). What is the electric force actin

umka2103 [35]

Answer:

F = 91.27 N

Explanation:

Parameters given:

Charge of alpha particle, q = +2.0e = $2.0 * 1.60217662 * 10^{-19}$ = $3.204 * 10^{-19} C$

Charge of gold nucleus, Q = +79e = $79 * 1.60217662 * 10^{-19}$ = $1.266 * 10^{-17} C$

Distance between the alpha particle and gold nucleus, r = $2.0 * 10^{-14} m$

Electric force is given as:

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

where k = Coulomb's constant

Therefore:

$F = \frac{9 * 10^9 * 3.204 * 10^{-19} * 1.266 * 10^{-17}}{(2.0 * 10^{-14})^2} \\\\\\F = 91.27 N$

The electric force acting on the alpha particle when the alpha particle is $2.0 * 10^{-14} m$ from the gold nucleus is 91.27 N.

7 0

3 years ago

the impact time for a particular collision is 3.0 × 10-3 seconds and the impulse in the collision is 0.30 newton seconds. what i

Zanzabum

There are several information's already given in the question. The answer can be easily deduced using those information's.

Time = 3.0 * 10-3 seconds
Impulse = 0.30 newton
Then
Force = Impulse/Time
= 0.30/3.0 * 10-3
= 1 * 10^3 newtons.
I hope the above procedure is clear for you to understand and it has actually come to your great help.

3 0

4 years ago