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skelet666 [1.2K]
3 years ago
5

A scientist wants to calculate the kinetic energy of a cheetah as it chases down its prey. What does the scientist need to measu

re in order to determine the kinetic energy of the cheetah?
Select all that apply.

the cheetah's amount of matter
the cheetah's speed
the amount of energy the cheetah absorbs from the sun
the amount of energy the cheetah releases into its surroundings
the cheetah's temperature
Physics
2 answers:
neonofarm [45]3 years ago
5 0

Answer:

the cheetah's amount of matter

the cheetah's speed

Explanation:

Kinetic energy is calculated according to the following equation

K.E = \frac{mv^{2} }{2}

where m represents the mass of the body in kilograms

and v represents the magnitude of the velocity which is know as speed of the body in m/s

Knowing this then, the scientist needs two things from that list:

the cheetah's amount of matter (also known as the mass)

the cheetah's speed

Feliz [49]3 years ago
4 0

Answer:

A + B

Explanation:

A) The cheetah's amount of matter

B) The cheetah's speed

(P.S. I just took a test on this and got it correct.)

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A driver in a 2290-kg car car traveling at 42.7 m/s slams on the brakes and skids to a stop. If the coefficient of friction betw
8_murik_8 [283]

Answer:

126.56 m

Explanation:

Applying,

-F = ma............. Equation 1

Where F = frictional force, m = mass of the car, a = acceleration.

Note: Frictional force is negative because it act in opposite direction to motion

But,

F = mgμ.......... Equation 2

Where g = acceleration due to gravity, μ = coefficient of friction

Substitute equation 2 in equation 1

-mgμ = ma

a = -gμ.............. Equation 3

From the question,

Given: μ = 0.735

Constant: 9.8 m/s²

Substitute these values in equation 3

a = -9.8×0.735

a = -7.203 m/s²

Finally,

Applying

v² = u²+2as.............. Equation 4

Where v = final velocity, u = initial velocity, s = distance

From the question,

Given: u = 42.7 m/s, v = 0 m/s (to a stop), a = -7.203 m/s²

Substitute these values into equation 4

0² = 42.7²+2(-7.203)s

-1823.29 = -14.406s

s = -1823.29/-14.406

s = 126.56 m

4 0
3 years ago
What happens when you change the number of electrons in an atom
aalyn [17]
<h2>Answer: It becomes an Ion </h2>

When an atom has gained or lost electrons (negative charge), it becomes an ion.

In this sense:

<h2>Ions are atoms that have <u>gained or lost</u> electrons in their electronic cortex. </h2><h2> </h2>

If a neutral atom <u>loses electrons</u>, it remains with an excess of positive charge and transforms into a positive ion or <u>cation</u>, whereas if a neutral atom <u>gains electrons</u>, it acquires an excess of negative charge and transforms into a negative ion or <u>anion</u>.

It is then how ions form bonds with other atoms differently depending on the number of electrons they have.

8 0
3 years ago
A beaker weighs 0.4N when empty and1.4N when filled with water what does ot weigh when filled with brine of density 1.2 g/cm3
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Answer:2.47

Explanation:

So, the beaker weighs 1.40N when filled with water, brine of density weighs about 1.7N, you add the density + water. Have a good day!

7 0
2 years ago
An automobile with tires that have a radius of 0.260 m travels 76000 km before wearing them out. How many revolutions do the tir
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Answer:

Explanation:

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76000km = 76000000m

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