Answer:
Explanation:
The gas law relation is
PV = nRT where n is no of moles of gas
given 1 kg of oxygen
n = 1000 / 32 = 31.25 moles
P = 30 bar = 30 x 10⁵ Pa
V =?
T = 180 K
R = 8.32
Substituting the values
30 x 10⁵ x V = 31.25 x 8.32 x 180
V = 1560 x 10⁻⁵ m³
= 1.56 x 10⁻² m³
When volume remains constant , pressure is proportional to temperature
P₂ / P₁ = T₂ / T₁
P₂ = ( 150 / 180 ) x 30
= 25 Bar.
1. Marie and her husband discovered polonium, a new radioactive element, and radium. Marie was the first woman to receive a Novel Prize , and two in her lifetime. She was also the first scientist to receive two Nobel Prizes. Not only that, she was the first person to receive two Nobel Prizes in two different fields, Chemistry and Physics. During World War 1 Marie helped soldiers by creating the x ray. After the war ended Marie raised money to help cure and treat disease using radiology.
2. I am not exactly sure what is happening in that picture but it looks like a boat floating on sea than sunken by a shipwreck on dry land.
Answer:
work done = 79.825 J
Explanation:
given,
mass of box = 22.6 Kg
energy = 58 J
speed = 1.5 m/s
for box and the earth system the only external force is the pushing force
work done by external force = change of energy of the system
U = work done - K
box is moving with constant velocity hence no change in kinetic energy.
so, K is equal to zero.
U = work done
U = 58.0 J
work done by pushing force = K + U
now, work done when box reaches to the speed of 1.5 m/s
work done = final kinetic energy - initial kinetic energy + U
work done = 0.5 m v² - 0 + U
work done= 0.5 x 19.4 x 1.5² + 58.0
work done = 79.825 J
Answer:
(a): s(t)= hi + Vo * t - g* t²/2
(b): Will take the ball to reach the ground t= 11 seconds.
Explanation:
hi= 880 ft
Vo= 96 ft/s
g= 32 ft/s²
equating to 0 the equation of s(t) and clearing t, we find the time it takes for the ball to fall to the ground.
Answer:
Explanation:
Work is the product of force and displacement. Work is positive if force and displacement moves in the same direction. Work is negative if force and displacement moves in opposite direction. Take for example, a load is to move from point A to point B in the forward direction. if you apply force on the load from point A to B work done on the load is positive. If it happens that the force you apply is to the opposite direction, the work done will be negative.