Answer:
d) The 2 athletes reach the same height, because the athletes run with the same speed.
Explanation:
In the whole process , kinetic energy is converted into potential energy .
1/2 m v² = mgh
v² = 2gh
h = v² / 2g
In this expression we see that height attained does not depend upon mass of the object . At the same time it also makes it clear that it depends upon velocity . As the velocity in both the cases are same , height attained by both of them will be same. Hence option d ) is correct.
Answer:
175 m
Explanation:
The average velocity for constant acceleration is the average of the beginning and ending velocities. That is (0+39)/2=19.5 m/s. If the bicyclist rides for 9 seconds, the distance traveled is ...
(9 s)(19.5 m/s) = 175.5 m
She would travel 175.5 meters in that time.
Answer:
Explanation: heat of fusion
Answer: Strength or energy as an attribute of physical action or movement.
Explanation:
The dependent variable in this experiment is the mass of each liquid.
Density is the ratio of mass to volume of a substance. In this experiment, since the volume of each liquid is given, to get density, mass of each quantity must be known which is the outcome.
Density also depend on the mass of a substance and density can easily be identified by mass if all the substance in question have the same volume.
In this experiment, all the liquid have the same volume. Since the student want to list them in order from the least dense to the most dense, how dense the liquid are will be a function of the differences in liquid mass.
The least dense liquid will float. That is, will be at the top most of the container. While the most dense will be at the bottom of the container.
Therefore, the dependent variable in this experiment is the mass of each liquid
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