Which of the following is an example of kinetic energy transfer?
A. A large snowball sitting at the top of the hill
B. Xavier pushing Brad down the snowy hill on a shed
C. A car parked on a steep hill
D. Jules sitting in a chair
Which example demonstrates kinetic energy?
A. A wave crashing on a shore
B. A streched-out rubber band
C. A car parked in a parking lot
D. A rock sitting at the top of a hill
When Kiara plays the piano, how does the kinetic energy transfer from one object to the other?
A. Energy transsfer from Kiara's fingers to the piano keys
B. Energy transfers from the piano keys to kiara's fingers
C. Energy transfers from the piano pedals to the piano keys
D. Energy transfer from the air to kiara's fingers
A. Xavier pushing Brad down the snowy hill on a sled
B. A wave crashing on a shore
A. Energy transfers from Kiara's fingers to the piano keys
The correct answers are:
1. B. Xavier pushing Brad down the snowy hill on a shed - This is an example of kinetic energy transfer because Brad has motion as Xavier pushes him down the hill.
2. A. A wave crashing on a shore - When a wave crashes on a shore, it demonstrates kinetic energy as it has motion and is transferring energy to the shore.
3. A. Energy transfers from Kiara's fingers to the piano keys - When Kiara plays the piano, the kinetic energy transfers from her fingers to the piano keys as she strikes them to produce sound.
To determine which option is an example of kinetic energy transfer in each question, we need to understand what kinetic energy is.
Kinetic energy refers to the energy possessed by an object due to its motion. It is determined by both the mass and velocity of the object. When kinetic energy is transferred from one object to another, it means that the motion and energy are passed on from one object to the other.
Let's apply this understanding to each question:
Question 1:
A. A large snowball sitting at the top of the hill - This does not demonstrate kinetic energy transfer as the snowball is stationary.
B. Xavier pushing Brad down the snowy hill on a sled - This demonstrates kinetic energy transfer as Brad (the object) is in motion due to Xavier's push.
C. A car parked on a steep hill - This does not demonstrate kinetic energy transfer as the car is stationary.
D. Jules sitting in a chair - This does not demonstrate kinetic energy transfer as Jules and the chair are stationary.
Therefore, the correct answer is B. Xavier pushing Brad down the snowy hill on a sled.
Question 2:
A. A wave crashing on a shore - This demonstrates kinetic energy transfer as the energy in the wave transfers to the shore.
B. A stretched-out rubber band - This does not demonstrate kinetic energy transfer as the rubber band is stationary.
C. A car parked in a parking lot - This does not demonstrate kinetic energy transfer as the car is stationary.
D. A rock sitting at the top of a hill - This does not demonstrate kinetic energy transfer as the rock is stationary.
Therefore, the correct answer is A. A wave crashing on a shore.
Question 3:
A. Energy transfers from Kiara's fingers to the piano keys - This correctly describes how kinetic energy transfers when Kiara plays the piano. The motion of Kiara's fingers is transferred to the piano keys, producing sound.
B. Energy transfers from the piano keys to Kiara's fingers - This does not accurately describe kinetic energy transfer in this scenario.
C. Energy transfers from the piano pedals to the piano keys - This does not accurately describe kinetic energy transfer in this scenario.
D. Energy transfers from the air to Kiara's fingers - This does not accurately describe kinetic energy transfer in this scenario.
Therefore, the correct answer is A. Energy transfers from Kiara's fingers to the piano keys.
A line contains the points (-3, 6) and (2, 1). What is the slope of the line?
To find the slope of a line given two points, we can use the formula:
slope = (change in y)/(change in x) = (y2 - y1)/(x2 - x1)
Let's plug in the values:
x1 = -3
y1 = 6
x2 = 2
y2 = 1
slope = (1 - 6)/(2 - (-3))
= (-5)/(2 + 3)
= -5/5
= -1
Therefore, the slope of the line is -1.
The equation of a line is y = - 2x - 4. What is the y-intercept?
To find the y-intercept of the line, we look at the equation given. The y-intercept is the point where the line intersects the y-axis, which occurs when x=0.
In the equation y = -2x - 4, we can see that when x = 0, the term -2x becomes 0, leaving us with:
y = -2(0) - 4
y = 0 - 4
y = -4
Therefore, the y-intercept of the line is -4.
The proportional relationship for the earnings and hours worked for Employee 1 is displayed in the table. The proportional relationship between the earnings and hours worked for Employee 2 is displayed in the graph. What is the equation that represents the proportion relationship between the earnings and hours worked for Employee 1 and Employee 2?
To determine the equation that represents the proportional relationship between the earnings and hours worked for Employee 1 and Employee 2, we will need the data provided in the table and the graph.
Since the table for Employee 1 was not explicitly given, we need more information to establish the proportion relationship between the earnings and hours worked for both employees.
Please provide the necessary information or the data for Employee 1's earnings and hours worked so that we can find the equation representing the proportional relationship between the two employees.