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Answer:
5 liters.
Explanation:
We are being given the expression
V = 0.041h - 0.018A - 2.69
The height h is 165 cm.
The Age A is 65 years old.
So we replace the values of h and A in the equation given:
V = 0.041 * 165 + 0.018 * 65 - 2.69 = 5.245 liters.
Rounding, we notice that 5.245 liters is closer to 5 than 6. So the answer would be 5 liters.
Answer:
The displacement of the air drop after 3 second is 18.27 m.
Explanation:
Mass of the rain drop = m =
Weight of the rain drop = W
Duration of time = t = 3 seconds
Drag force on rain drop =
Motion of the rain drop:
Net force on the rain drop , F= W - D
v = 12.18 m/s
Initial velocity of the rain drop = u = 0 (since, it is starting from rest)
v=u+at (First equation of motion)
(second equation of motion)
s = 18.27 m
The displacement of the air drop after 3 second is 18.27 m.
Answer:
150 newtons
Explanation:
F = ma
force = mass * acceleration
the mass is 10 kg, and the accelration is 15 m/s^2
10*15 = 150
the force unit that matches with meters/second and kg is newtons
F =ma
150 newtons = 10 kg * 15 m/s^2
Answer:
30m/s
Explanation:
Suppose there's no friction between the office chair and the floor. The only thing that impact the motion of the boy is the ejected carbon dioxide. We can apply the law of momentum conservation to find the his (the boy, the chair and the empty extinguisher) after the extinguisher is emptied.
Before the ejects, the system momentum is 0, due to at rest and no speed
After the ejects, momentum of the carbon dioxide is
9*20 = 180 kg m/s
The momentum of his is then
P + 180 = 0
P = -180
MV = -180
(26 + 16 + 18)V = - 180
V = -180/(26 + 16 + 18) = -30 m/s
So he would have a speed of 30m/s in the opposite of the ejected carbon dioxide direction