Answer: 
Explanation:
The angular diameter 
of a spherical object is given by the following formula:
Where:
is the actual diameter
is the distance to the spherical object
Hence:
This is the angular diameter
<h2>The work done = - 2 x 10⁴ J</h2>
Explanation:
In the first case , the volume is kept constant and pressure varies .
In isothermal process , the work done
W₁ = V x ΔP
here V is the volume of gas and ΔP is the change in pressure
Thus W₁ = 0
Because there is no change in volume , therefore displacement is zero .
In second case pressure is constant , but volume changes
Thus W₂ = P x ΔV
here P is the pressure and ΔV is the change in volume
Therefore W₂ = 4 x 10⁵ x 5 x 10⁻² = 2 x 10⁴ J
The total work done W = - 2 x 10⁴ J
Because the work done in compression is negative .
Answer:
4th answer
Explanation:
The gradient of a distance-time graph gives the speed.
gradient = distance / time = speed
Here, the gradient is a constant till 30s. So it has travelled at a constant speed. It means it had not accelarated till 30s. and has stopped moving at 30s.
<span>As the marble leaves the table at two different speeds, its
horizontal velocity changes, but its vertical velocity does not.</span>
Answer:
500 J
Explanation:
Kinetic Energy = (mass x velocity x velocity) ÷ 2
We know that mass = 10 kg and velocity = 10 m/s.
KE = (m × v × v) ÷ 2
KE = (10 kg × 10 m/s × 10 m/s) ÷ 2
KE = 500 J
The kinetic energy of the object is 500 J (joules). Hope this helps, thank you !!
