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Tamiku [17]
2 years ago
8

Define kinetic energy?​

Physics
2 answers:
mariarad [96]2 years ago
5 0
It is the energy an object has because of its motion.
valentina_108 [34]2 years ago
3 0

Answer:

the form of energy that makes something move

Explanation:

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A long-distance runner is running at a constant speed of 5 m/s.
vivado [14]

Answer:

3.33 minutes (3 minutes and 20 seconds)

Explanation:

Speed of the runner = s = 5 m/s

We need to calculate how will it take for runner to complete 1 km. We have the speed, the distance and we need to find the time. Before performing any calculations, we must convert the values to same units.

Speed is in m/s and distance is in kilometers. So we have to either convert speed to km/s or distance into meters. In this case, converting distance into meters would be a convenient option.

1 kilo meters = 1000 meters

The distance, speed and time are related by the equation:

Distance = Speed x Time

So,

Time = Distance/Speed

Using the values, we get:

t = 1000/5

t = 200 seconds

This means, the runner can complete 1 kilometers in 200 seconds. Since, there are 60 seconds in a minute, we can convert this time to minutes, by dividing it by 60. i.e.

200 \text{ sec} = \frac{200}{60} \text{ min} = 3.33 \text{ min}

Thus, it will take the runner 3.33 minutes (3 minutes and 20 seconds) to travel 1 km.

3 0
3 years ago
How to separate a mixture of iron ad copper pieces using an electromagent​
aleksandr82 [10.1K]

Answer:

Suck up the iron using the electromagnet.

Explanation:

Iron is magnetic and copper is not. So copper will be

unaffected by the magnet. After extracting the iron,

open the switch. The electromagnet will lose its

magnetism and the iron fillings will fall off..

6 0
2 years ago
Give one example in which both physical and chemical changes takes places ​
daser333 [38]

Answer:

during respiration physical and chemical change both are occuring

Explanation:

4 0
3 years ago
Read 2 more answers
Does light travel faster through water or glass?
Len [333]

Answer: The refractive index or n shows the relationship between c and the speed v when light travels through a material. The equation is n=c/v. In water, the refractive index is 1.3 and in glass, it is 1.5. Therefore, light travels faster through water, than it travels through glass.

Explanation:

4 0
3 years ago
he acceleration due to gravity on the surface of Mars is about one third the acceleration due to gravity on Earth’s surface. The
Ahat [919]

1/3 the weight than it is on earth

5 0
3 years ago
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