g In a cold rolling operation, steel sheets that are initially 300 cm long X 80 cm wide X 8 cm thick are cold worked to 80 cm wi
1 answer:
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We know the equation of motion v = u+ at, where v is the final velocity, u is the initial velocity, a is the acceleration and t is the time taken.
In this case Final velocity = -3.1 m/s, negative sign indicates it is pointing downward.
acceleration = - 3.7m/ . Negative means acceleration is towards center of planet Mars.
Time taken = 3 seconds
So jumping velocity of Julia = 8 m/s
Answer:
The average kinetic energy of a gas molecule is 8.49 × 10⁻²¹ J
Explanation:
According to Kinetic Molecular Theory, the average kinetic energy of gas molecules is a function only of temperature and is given by the equation:
Substituting the value of T in the kinetic energy equation:
Where p is the pressure of the gas = 9 atm = 9 × 101325 pa
k is the Boltzmann’s constant = 1.38066 × 10⁻²³ J/K,
V is the volume of the gas = 7.1 L = 7.1 × 10⁻³ m³
n is the number of moles of the gas = 1.9 mol
R is the universal gas constant = 8.31451 J/K · mol.
E is the average kinetic energy of a gas molecule
Substituting values:
The average kinetic energy of a gas molecule is 8.49 × 10⁻²¹ J