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stellarik [79]
3 years ago
10

Which of the following best describes an isotope? Which of the following best describes an isotope? an atom with an unequal numb

er of protons and electrons a structural variation in which different atoms of the same element have different numbers of neutrons a structural variation in which different atoms of the same element have different numbers of electrons a structural variation in which different atoms of the same element have different numbers of protons
Physics
1 answer:
deff fn [24]3 years ago
6 0

Answer:

a structural variation in which different atoms of the same element have different numbers of neutrons

Explanation:

An isotope is an atom of an element having the same number of protons but different number of neutrons. Different isotopes are used for different purposes. Example: some are used in medicines , food irradiation, etc.

Carbon has three isotopes  C 12, C 13, C 14. All three of them have 6 protons but have different numbers of neutrons.

C 12 is a common element and is abundant in nature

C 13 is less abundant than C 12

C 14 is used for dating fossils . It is radioactive

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romanna [79]

Answer:

(1) weight = 565N

distance = 325m

time= 12.6s

power = work done/time

work done= force * distance

= 565*3.25 =1836.25

:. power = 1836.25\12.6

=145.7!

(2) the books will add more to her weight and thereby increasing her power output.

4 0
3 years ago
An object moves with constant acceleration 3.10 m/s2 and over a time interval reaches a final velocity of 12.4 m/s. If its initi
Harrizon [31]

Answer:

Explanation:

Given:

a = 3.10 m/s^2

vf = 12.4 m/s

vi = -6.2 m/s

t = (vf - vi)/a

= (12.4 + 6.2)/3.1

= 6 s

displacement = (vf - vi)*t

= (12.4 + 6.2) * 6

= 111.6 m.

3 0
3 years ago
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What happens when a roller coaster car moves down from the top of a hill?
VLD [36.1K]
When the roller coaster moves down from the top of the hill, all of its stored potential energy is converted into kinetic energy to move it and when it goes back up the hill it turns kinetic into potential.

3 0
3 years ago
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A steel rod with a length of l = 1.55 m and a cross section of A = 4.89 cm2 is held fixed at the end points of the rod. What is
Vedmedyk [2.9K]

Answer:

The size of the force developing inside the steel rod is 32039.28 N

Explanation:

Given;

length of the steel rod, L =  1.55 m

cross sectional area of the steel, A = 4.89 cm²

temperature change, ∆T = 28.0 K

coefficient of linear expansion for steel, α = 1.17 × 10⁻⁵ 1/K

Young modulus of steel,  E = 200.0 GPa.

Extension of the steel is given as;

α ∆T L = FL / AE

α ∆T = F/AE

F = AEα ∆T

F = ( 4.89 x 10⁻⁴)(200 x 10⁹)(1.17 × 10⁻⁵)(28.0 K)

F = 32039.28 N

Therefore, the size of the force developing inside the steel rod when its temperature is raised, is 32039.28 N

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3 years ago
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son4ous [18]

Answer:

One 200 is bigger than 100

Explanation:

6 0
3 years ago
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