Answer:
D on ed 2020
Explanation:
I live in the city. It's always warmer in the city, compared to other areas, even at night. Why is that?
A.) The rain shadow effect makes surrounding areas cool and moist and the city warm and dry.
B.) Buildings absorb and retain heat from the Sun, producing the urban heat island effect.
C.) Lake effect snow only affects areas outside of the city.
D.) The city receives lake effect snow.
Answer:
Explanation:
First of all, we can find the work done as follows:
where P is the power and t is the time taken. In this problem, and , so the work done is
The work done is equal to the force applied F times the displacement d:
since we know d=20.0 meters, we can re-arrange the equation to find the force exerted:
Answer:
C) 1.4 × 105 newtons
Explanation:
Correct answer on plato/edmentum
Answer:
No, the apple will reach 4.20041 m below the tree house.
Explanation:
t = Time taken
u = Initial velocity = 2.8 m/s
v = Final velocity = 0
s = Displacement
g = Acceleration due to gravity = -9.81 m/s² = a (negative as it is going up)
Equation of motion
The height to which the apple above the point of release will reach is 0.39959 m
From the ground the distance will be 1.3+0.39959 = 1.69959 m
Distance from the tree house = 5.9-1.69959 = 4.20041 m
No, the apple will reach 4.20041 m below the tree house.
The values in the option do not reflect the answer.
The apple will not reach the friend in the tree house as it will only reach a height of approximately 1.527 m.
To determine whether the apple will reach a friend in a tree house 5.9 m above the ground, we can use the equations of motion. Since the apple is thrown vertically upward, it will experience a negative acceleration due to gravity. Using the equation h = vo*t + (1/2)*a*t^2, where h is the final height, vo is the initial velocity, a is the acceleration, and t is the time, we can calculate the time it takes for the apple to reach a height of 5.9 m. Plugging in the values, we get:
5.9 = 2.8*t + (1/2)*(-9.81)*t^2
Simplifying the equation, we have:
-4.905*t^2 + 2.8*t - 5.9 = 0
Using the quadratic formula, we can solve for t. The quadratic formula is t = (-b ± sqrt(b^2 - 4ac)) / (2a), where a = -4.905, b = 2.8, and c = -5.9.
Plugging in the values, we get:
t = (-2.8 ± sqrt(2.8^2 - 4*(-4.905)*(-5.9))) / (2*(-4.905))
After evaluating the formula, we find that the apple will take approximately 1.527 seconds to reach a height of 5.9 m. Since the apple continues to rise after reaching this height, it will not reach the friend in the tree house.