Answer: The ball would exert and equal force on the astronaut in the opposite direction. Both would move away from each other in a straight path. Hope this helps!

3 0

4 years ago

A gas contained within a piston-cylinder assembly undergoes two processes, A and B, between the same end states, 1 and 2, where

Sidana [21]

Answer:

a) 90 kJ

b) 230.26 kJ

Explanation:

The pressure at the first point $P_{1}$ = 10 bar —> 10 x 102 = 1020 kPa

The volume at the first point $V_{1}$ = 0.1 m^3

The pressure at the second point $P_{2}$ = 1 bar —> 1 x 102 = 102 kPa

The volume at the second point $V_{2}$ = 1 m^3

Process A.

constant volume V = C from point (1) to P = 10 bar.

Constant pressure P = C to the point (2).

Process B.

The relation of the process is PV = C

Required

For process A & B

(a) Sketch the process on P-V coordinates

(b) Evaluate the work W in kJ.

Assumption

Quasi-equilibrium process

Kinetic and potential effect can be ignored.

Solution

For process A.

V=C

There is no change in volume then

$W_{a(1)}= 0\\P=10^{2}$

The work is defined by

$W_{a(2)}=\int\limits^V_V {P} \, dV$

$W_{A(2)} =$ ║ $10^{2}$ V║limit 1--0.1

$W_{A(2)} =$ 90 kJ

Process B

PV=C

By substituting with point (1) C = 10^2 x 1= 10^2

The work is defined by

$W_{b}=\int\limits^V_V {P} \, dV\\P=10^{2} V^{-1}\\ W_{b}=\int\limits^V_V {10^{2} V^{-1}} \, dV\\\\$

$W_{A(2)} =$ ║ $10^{2}$ ln(V)║limit 1--0.1

=230.26 kJ

3 0

3 years ago

What are two pieces of evidence that support the big bang theory?.

IrinaK [193]

One -the universe is expanding, proven with something called red-shift (wavelength of light increases due to distance between objects increases) Two - cosmic microwave background radiation. Three - the abundance of different elements in the universe.

4 0

2 years ago