Answer:
The President of the United States is Commander in Chief of all US armed forces . He also appoints the Secretary of Defense who serves at his discretion. The president chooses the assignments of high ranking generals and admirals.
The president makes budget recommendation and so influences the size and make-up of the military and the choices of which weapons systems to buy and pay for developing.
Explanation:
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Answer: PE = 800j, KE = 800J
Explanation:
To calculate the potential energy, we use the formula
Potential Energy = Mgh
M = 20kg, g = 10m/sˆ2 , h = 4m
=20 × 10 × 4
=800J
At the maximum height S = 4 and the initial velocity u = 0 The acceleration g = 10m/sˆ2
Using the third equation of motion
vˆ2 = uˆ2 + 2as
= 0ˆ2 + 2 × 10 × 4
vˆ2 = 80
Kinetic Energy (KE) is given by
KE = ½ mvˆ2
= ½ × 20 × 80
=800J
Answer:
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