Question 25

Question

Given the following nuclear reaction:



Column A
1.
What is the atomic mass of the new atom?:
What is the atomic mass of the new atom?
2.
What is the atomic number of the new atom?:
What is the atomic number of the new atom?
3.
What is the symbol of the new atom?:
What is the symbol of the new atom?
4.
What type of decay is demonstrated here?:
What type of decay is demonstrated here?
Column B
a.87
b.222
c.86
d.89
e.Gamma Decay
f.224
g.Beta Decay
h.223
i.88
j.Alpha Decay
k.Ra
l.Fr
m.Ac
Question 26
How many half-lives does it take a radioactive substance to decay until only one-eighth of the original substance remains?

a
six
b
two
c
three
d
eight
Question 27
The half-life for a 100-gram sample of radioactive element X is 5 days. How much of element X remains after 10 days have passed?

a
100 g
b
50 g
c
25 g
d
75 g
Question 28
Look at Zeke.

He’s riding his skateboard down a ramp. Assume that his acceleration is 0.8 m/s2. How much force does it take for him to accelerate at this rate? Zeke has a mass of 50 kg.

a
50 N
b
62.5 N
c
40 kg
d
40 N
Question 29
As you are walking, you foot gets caught on an uneven piece of sidewalk and you trip and fall. Which of the following explains what is happening using Newton's Laws?

a
The sidewalk pushed you, causing a rapid force that made you fall
b
The sidewalk provided a force to stop your foot, but the top of your body was still moving which is what causes you to tip over
c
Your foot hit the sidewalk and provided a force on it, so the sidewalk will provide another force back on your foot, equal in magnitude but opposite in direct
d
Your foot pushes the sidewalk with such force that it causes the next piece of sidewalk to be uprooted, which makes your next step miss your footing
Question 30
A block with a mass of 55 kg is pulled with a force of 220 N. Assuming a frictionless surface, what will be the acceleration of the block?

a
9.8 m/s2

b
4.0 m/s2

c
0.25 m/s2

d
22 m/s2

Question 31
Trial Force (N) Acceleration (m/s^2)
1 10 N 2.5
2 12 3
3 22 5.5
Students are running an experiment in which they are measuring the acceleration after applying forces to a cart. Using the data above, what is the mass of the cart?

a
2 kg
b
4 kg
c
6 kg
d
8 kg
Question 32
According to Newton's Third Law, if a sledgehammer hits a wall with a force of 1000 N, how much force does the wall hit the sledgehammer?

a
0 N
b
500 N
c
1000 N
d
- 1000 N
Question 33
Which of the following would be a situation with unbalanced forces?

a
Two people pulling on the same side of a wheelbarrow
b
A team of players in tug of war pulling on the rope, each team with equal numbers of people pulling with equal strength
c
Two people of opposite sides of a big tire. One pushes the tire and one pulls it with equal force
d
Two people not touching a crate that is sitting stationary
Question 34
Why is it generally easier to push a heavy object that is already moving instead of the same heavy object that is stationary

a
The force of gravity on the object is different if it is stationary or not.
b
The force of friction on the object is different if it is stationary or not
c
The force of the push on the object is different if it is stationary or not
d
The normal force on the object is different if it is stationary or not
Question 35
The table below shows the mass and velocity of four objects. Which object has the least inertia?

a
W
b
X
c
Z
d
Y
Question 36
The graph below represents the relationship between speed and time for a car moving in a straight line.

What is the acceleration of the car?

a
0 m/s2

b
1.0 m/s2

c
0.10 m/s2

d
10 m/s2

Question 37
Shown in the diagram below is path A from point P1 to P2, along which a dog ran. Also shown is an arrow labeled B.

What do A and B represent in the diagram?

a
A represents the displacement the dog traveled, while B is a vector representing the distance of the dog.
b
A represents the change in position the dog traveled, while B is a vector representing the distance of the dog.
c
A represents the displacement the dog traveled, while B is a vector representing the change in position of the dog.
d
A represents the distance the dog traveled, while B is a vector representing the displacement of the dog.
Question 38
David is skateboarding at a speed of 2.5 m/s. How far can he travel on his skateboard in 100 seconds?

\large speed=\frac{distance}{time}

a
102.5 m
b
40 m
c
0.025 m
d
250 m
Question 39
What is the difference between speed and velocity?

a
Velocity has time.
b
Velocity has weight.
c
Velocity has distance.
d
Velocity has direction.
Question 40
An ant on a picnic table travels 30.0 cm to the east, then 15.0 cm to the west. What is the magnitude of the ant's displacement from its original position?

a
45 cm to the west
b
15 cm to the east
c
45 cm to the east
d
15 cm to the west

Answer 1

Here are the answers to your quiz questions:

Question 25

1. What is the atomic mass of the new atom?: b. 222
2. What is the atomic number of the new atom?: k. Ra (Radium)
3. What is the symbol of the new atom?: c. 86
4. What type of decay is demonstrated here?: j. Alpha Decay

Question 26 How many half-lives does it take a radioactive substance to decay until only one-eighth of the original substance remains?
Answer: c. three

Question 27 The half-life for a 100-gram sample of radioactive element X is 5 days. How much of element X remains after 10 days have passed?
Answer: c. 25 g

Question 28 Assuming Zeke has a mass of 50 kg and an acceleration of 0.8 m/s², the force can be calculated using F = m * a.
Force: \( F = 50 , \text{kg} \times 0.8 , \text{m/s}^2 = 40 , \text{N} \)
Answer: d. 40 N

Question 29 As you are walking, you trip and fall. Which of the following explains what is happening using Newton's Laws?
Answer: b. The sidewalk provided a force to stop your foot, but the top of your body was still moving which is what causes you to tip over

Question 30 A block with a mass of 55 kg is pulled with a force of 220 N. Assuming a frictionless surface, what will be the acceleration of the block?
Using \( F = m \cdot a \) → \( a = \frac{F}{m} = \frac{220 , N}{55 , kg} = 4.0 , m/s^2 \)
Answer: b. 4.0 m/s²

Question 31 Using the data, we can find the mass of the cart from one of the trials:
Trial 1: \( F = 10 , N \), \( a = 2.5 , m/s^2 \)
\( \text{mass} = \frac{F}{a} = \frac{10 , N}{2.5 , m/s^2} = 4 , kg \)
Answer: b. 4 kg

Question 32 According to Newton's Third Law, if a sledgehammer hits a wall with a force of 1000 N, the wall hits the sledgehammer with an equal and opposite force.
Answer: c. 1000 N

Question 33 Which of the following would be a situation with unbalanced forces?
Answer: a. Two people pulling on the same side of a wheelbarrow

Question 34 Why is it generally easier to push a heavy object that is already moving instead of the same heavy object that is stationary?
Answer: b. The force of friction on the object is different if it is stationary or not.

Question 35 The object with the least inertia will have the least mass.
Answer: a. W (or whichever has the least mass)

Question 36 Without the graph, I cannot calculate acceleration definitively. If the speed is constant, then:
Answer: a. 0 m/s²
If it's increasing linearly, it might be b. 1.0 m/s² depending on the gradient.

Question 37 What do A and B represent in the diagram?
Answer: c. A represents the displacement the dog traveled, while B is a vector representing the change in position of the dog.

Question 38 David is skateboarding at a speed of 2.5 m/s. How far can he travel in 100 seconds?
Distance = speed × time = \( 2.5 , m/s \times 100 , s = 250 , m \)
Answer: d. 250 m

Question 39 What is the difference between speed and velocity?
Answer: d. Velocity has direction.

Question 40 The magnitude of the ant's displacement from its original position:
Initial position = 0 cm
Displacement = 30 cm (east) - 15 cm (west) = 15 cm (east)
Answer: b. 15 cm to the east

If you need any clarification for the answers, feel free to ask!