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Elden [556K]
3 years ago
11

A neutral atom of tin (Z = 50) has 69 neutrons. (a) How many protons does it have? (b) What is its mass number?

Physics
1 answer:
Olenka [21]3 years ago
3 0

Answer:

Protons = 50

Mass number = 119

Explanation:

A neutral of tin, Sn, has a Z value of 50 and neutrons are 69.

Z is the atomic number. The atomic number is equal to number of protons or number of electrons in an atom that is neutral i.e:

Z = PROTONS = ELECTRONS

So the number of protons = 50 since Z is 50

>>>>>>>>>>>>>>>¦

The bulk of the mass of an atom is concentrated in the nucleus. To calculate mass number, we simply sum all the elementary particles in the nucleus i.e protons and neutrons. These particles are called the nucleons.

Mass number (A) = P + N

= 50 + 69

= 119

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A body is oscillating up and down at the end of a spring. Let’s consider when the body is at the top of its up-and-down motion.
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The velocity of the body is zero; option A

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1 year ago
022 (part 1 of 4) 10.0 points A ball is thrown vertically upward with a speed of 24.5 m/s. How high does it rise? The accelerati
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1)

Answer:

Part 1)

H = 30.6 m

Part 2)

t = 2.5 s

Part 3)

t = 2.5 s

Part 4)

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Explanation:

Part 1)

initial speed of the ball upwards

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so maximum height of the ball is given by

H = \frac{v_i^2}{2g}

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As we know that final speed will be zero at maximum height

so we will have

v_f - v_i = at

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Part 3)

Since the time of ascent of ball is same as time of decent of the ball

so here ball will same time to hit the ground back

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Part 4)

since the acceleration due to earth will be same during its return path as well as the time of the motion is also same

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Answer:

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As we know that the object is released from rest

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Answer:

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Answer:

Part 1)

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y = 25.95 m

Part 2)

Distance traveled by it in horizontal direction is given as

d = v_x t

d = 2.92 \times 2.3

d = 6.72 m

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