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guajiro [1.7K]
3 years ago
8

An isotope has the same ________, but a different ________ .

Physics
2 answers:
11111nata11111 [884]3 years ago
6 0
I<span>sotopes of an element have the same number of protons but different number of neutrons.</span>
Lunna [17]3 years ago
4 0
An isotope is one of the forms of an element that has the same number of protons, but a different number of neutrons.
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A scientist carries out an experiment. How could she help other scientists judge the validity of her results?
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One way to do it is she could right down the data that she got
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Select the correct answer.
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Answer:O – H

Explanation:

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Explain how surface and subsurface events are integral parts of the rock cycle.
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3 years ago
There is a 3-kg toy cart moving at 4 m/s. Calculate the kinetic<br> energy of the cart.
m_a_m_a [10]

The kinetic energy of the cart is 24 J.

<u>Explanation:</u>

The acceleration of a given mass from rest to the velocity is known as kinetic energy. It gains energy from acceleration and remains in this state until the speed of the object changes.  

The kinetic energy is the given by,

                           K.E = 1/2 mv^2

Given the mass m = 3 kg,        v = 4 m / s.

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5 0
3 years ago
A 5-kg projectile is fired over level ground with a velocity of 200 m/s at an angle of 25°above the horizontal. Just before it h
Nutka1998 [239]

Answer:

the change in thermal energy of the projectile is 43.8 kJ

Explanation:

Given;

mass of the object, m = 5kg

initial velocity of the projectile, v₁ = 200 m/s

final  velocity of the projectile, v₂ = 150 m/s

To determine the the change in the thermal energy of the projectile and air, we consider change in potential and kinetic enrgy of the projectile. Since the projectile was fired over level ground, change in potential energy is zero.

Then, change in thermal energy of the projectile, KE = Δ¹/₂mv²

KE = Δ¹/₂mv² = ¹/₂m(v₁²-v₂²)

KE =  ¹/₂ × 5(200²-150²) = 2.5(17500) = 43750 J = 43.8 kJ

Therefore, the change in thermal energy of the projectile is 43.8 kJ

8 0
3 years ago
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