Answer:
Explanation:
Given:
- mass of water,
- initial temperature of water,
- final temperature of water,
- specific heat of water,
<u>Now the amount of heat energy required:</u>
Since all of the mechanical energy is being converted into heat, therefore the same amount of mechanical energy is required.
The work done on the filled bucket in raising out of the hole is 2, 925 Joules
<h3>How to determine the work done</h3>
Using the formula:
Work done = force * distance
Note that force = mass * acceleration
F = mg + ma
F = 4. 5 * 10 + 28 * 10
F = 45 + 280
F = 325 Newton
Distance = 9m
Substitute into formula
Work done = 325 * 9
Work done = 2, 925 Joules
Therefore, the work done is 2, 925 Joules
Learn more about work done here:
brainly.com/question/25573309
#SPJ1
Answer:
Collapsing of building.
Explanation:
When the is wind erosion and the is a building which is weak and on a mountain it can collapse killing people.
The sum of the two vectors in A, B, and C is equal to the sum of the two vectors above the line. The sum of the two vectors in D isn't.
Answer: First shot
Explanation:
A) Distance of puck from goal during the first shot = 5m away
Speed of puck during first shot = 10m/s
Time taken to score = ?
Since speed is the distance covered per unit time
i.e speed = Distance / time taken
Time taken = Distance / Speed
Time taken = 5m / 10m/s
= 0.5 seconds
B) Distance of puck from goal during the second shot = 10m away
Speed of puck during second shot = 40m/s
Time taken to score = ?
Recall that time taken = (Distance / Speed)
Time taken = 10m / 40m/s
= 0.25 seconds
It will take 0.5 seconds for the first shot to score whereas it will takes 0.25 seconds for the second shot to score.
Thus, the goalie have a better chance of blocking the first shot since it is slower than the second.