Answer;
= 58.8 joules
Solution and explanation;
Potential energy is given by the formula;
P.E = mgh where;
m is the mass in Kilograms
g is the gravitational acceleration (m/s²)
h is the height/distance in meters .
-Well the ball is held from the ground of a distance 1.5 meters, so, h = 1.5 m.
The mass of the ball is 4.0 kg, so m = 4.0 kg
Hence;
P.E = (4.0 kg) × (9.8 m/s²) × (1.5 m)
= 58.8 Joules
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Answer:
Explanation:
Let's evaluate each choice. Remember we are looking for an event to <em>decrease</em> the genetic variation and population.
A. Yellowstone expanded its borders
- If the park expanded, it's likely the population would increase. There would be more space and resources for the deer.
B. A population of wolves was introduced
- A wolf is a predator that preys on deer. If they were introduced, they would use the deer as a food source and decrease the population.
B seems like a good answer, but let's check the others.
C. The amount of disease in the deer population decreased.
- This would help the deer population. Less disease means fewer deaths and a greater population.
D. More grass and shrubs were planted in Yellowstone
- Deer are herbivores, so grass and shrubs would provide more food. This would keep the deer nourished and healthy, meaning a greater population.
The best answer choice is B: A population of wolves was introduced into Yellowstone National Park
I believe the correct answer is D