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3 years ago

Rocket can propel itself in a vacuum. True or false

Physics

1 answer:

makkiz [27]3 years ago

3 0

Answer:

Yes.

Explanation:

Rocket can propel itself in vacuum because the thrust is provided as a reaction to the the gases coming out of rocket, which have nothing to do with vacuum.

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A rigid, insulated tank that is initially evacuated is connected through a valve to a supply line that carries steam at 1 MPa an

ss7ja [257]

Answer:

Explanation:

The steam was earlier at 300 ° C. and pressure of 1 MPa. When the gas is allowed to expand against vacuum , work done by the gas is nil because there is no external pressure against which it has to work . Therefore there will not be any change in its internal energy. Since the tank is insulated therefore there is no possibility of external heat to increase its internal energy.

Hence the temperature of gas will remain unaffected. It will remain stagnant at 300

3 0

3 years ago

Dory has a mass of 0.5 kg and she is has a net force of 1 N on her as she starts to swim

Lunna [17]

Answer:

a = 2 m/s²

Explanation:

7 0

3 years ago

A wire of length L is wound around an iron cylinder mounted on a base. The two ends of the wire are connected to a battery via a

Bond [772]

Answer:

The ring will move away from the rod and fly upward

Explanation:

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4 years ago

The dimensions of a cylinder are changing, but the height is always equal to the diameter of the base of the cylinder. If the he

VashaNatasha [74]

Answer:

dV/dt = 9 cubic inches per second

Explanation:

Let the height of the cylinder is h

Diameter of cylinder = height of the cylinder = h

Radius of cylinder, r = h/2

dh/dt = 3 inches /s

Volume of cylinder is given by

$V = \pi r^{2}h$

put r = h/2 so,

$V = \pi \frac{h^{3}}{4}$

Differentiate both sides with respect to t.

$\frac{dV}{dt}=\frac{3h^{2}}{4}\times \frac{dh}{dt}$

Substitute the values, h = 2 inches, dh/dt = 3 inches / s

$\frac{dV}{dt}=\frac{3\times 2\times 2}{4}\times 3$

dV/dt = 9 cubic inches per second

Thus, the volume of cylinder increases by the rate of 9 cubic inches per second.

6 0

3 years ago

If it takes 600 N to move a box 5 meters, how much work is done on the box?

Arada [10]

Answer:3000joules

Explanation: work=force×distance

Work=600×5

Work=3000joules

6 0

4 years ago