Answer:
400N
Explanation:
If you have 2 forces (200N) and (200N) pushing an object the same direction in a one dimensional force vectors, the answer would be 400N
Answer:
18 L
Explanation:
Use ideal gas law:
PV = nRT
Find initial number of moles, but first convert to units that match the gas constant units.
(200,000 Pa) (0.025 m³) = n (8.314 Pa m³ / mol / K) (25 + 273.15 K)
n = 2.017 mol
At the new pressure and temperature:
(250,000 Pa) V = (2.017 mol) (8.314 Pa m³ / mol / K) (0 + 273.15 K)
V = 0.018 m³
V = 18 L
Since the anode dissolves and goes to the cathode. The object to be electroplated is kept at the cathode.
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The force exerted on the rope of the pulley system if the rope is pulled for 24 m in order to raise the mass to the required height is 81.6 N
<u>Explanation:</u>
Efficiency, γ = 64%
mass, m = 78 kg
height, h = 4 m
Force, F = ?
distance of the rope pulled, x = 24 m
We know,
Acceleration due to gravity, g = 9.81 m/s²
Potential energy, PE = mgh = (78) X (9.81) X (4) = 3060.72 joules
Work, W = F X x
F = W/d = (3060.72) / (24) = 127.53 N
However, the efficiency of the pulley system is 64%.
The real force required is F(net) = (127.53) X (0.64) = 81.6 N
Therefore, the force exerted on the rope of the pulley system if the rope is pulled for 24 m in order to raise the mass to the required height is 81.6 N
<h3>Hi there !</h3><h2>Option A is correct </h2>
<h3> Please refer the attachment for explanation</h3><h2>Stay safe, stay healthy and blessed</h2><h2>Have a marvelous day</h2><h2>Thank you</h2>