Answer:
<h2>30 N</h2>
Explanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 15 × 2
We have the final answer as
<h3>30 N</h3>
Hope this helps you
They are measured in joules, calories, and kilocalories
A front is a narrow region between two air masses of different densities.
Answer:
2849.98 J
Explanation:
From the question,
Work done by the boy = change Potential energy of the boy + change in kinetic energy of the boy
W = ΔP + ΔK..................... Equation 1
Where W = work done by the boy, ΔP = change in potential energy of the boy, ΔK = Change in kinetic energy of the boy.
But,
ΔP = mgΔh.................... Equation 2
ΔK = 1/2mΔv²................. Equation 3
Where m = mass of the boy, Δh = change in height of the boy, Δv = change in velocity of the boy.
Substitute equation 2 and 3 into equation 1
W = mgΔh+1/2mΔv²................. Equation 4
Given: m = 72 kg, Δh = 1.61 m, Δv = 8.5-1.6 = 6.9 m/s, g = 9.8 m/s²
Substitute into equation 4
W = 72(9.8)(1.61)+1/2(72)(6.9²)
W = 1136.016+1713.96
W = 2849.98 J
Answer:
The outbreak of tornadoes that tore across the Gulf and the East Coast Tuesday and Wednesday was unusual for two reasons. For one thing, the severe weather encompassed a significant swath of the country. For another, winter is the least likely time for tornadic thunderstorms.
Explanation:
The outbreak of tornadoes that tore across the Gulf and the East Coast Tuesday and Wednesday was unusual for two reasons. For one thing, the severe weather encompassed a significant swath of the country. For another, winter is the least likely time for tornadic thunderstorms.
And yet tornadoes are an expected part of life in the United States—especially in the multi-state area known as Tornado Alley. (Florida, too, sees a disproportionately high number of tornadoes, because of its frequent thunderstorms.) The United States gets more tornadoes, by far, than any other place on the planet. It averages about 1,250 twisters a year. Canada, which sees about 100 tornadoes per year, is a “distant second,” according to the National Centers for Environmental Information.
