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3 years ago

9. In 35 s..a pump delivers 55,000 g of oil into a barrel on a platform 25 m

Physics

1 answer:

julia-pushkina [17]3 years ago

3 0

The work done by the pump is 13475 J.
The power of the pump is 385 W.

<u>Explanation:</u>

When a force causes a body to move work is being done on the object by the force. Work is the measure of energy transfer when a force moves an object through a distance. The work done is the product of mass, gravity, and height.

Work done = m * g * h

= 55 * 9.8 * 25

Work done = 13475 J.

Power is defined as the rate of doing work with time.

Power = work done / time

= 13475 / 35

Power = 385 W.

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3 years ago

A motorboat sets out for open sea. From home it travels 5 km due East, then heads [N35E] at 2 m/s for 90 minutes. After a break,

geniusboy [140]

The distance of the motorboat relative to the home, which travels in various directions, is 3.07 km.

<h3>What is relative velocity?</h3>

Relative velocity is a velocity of an object which is in respect to another observer, or it is a ratio of change in the position of a point to time with respect to another observer.

Given: Travel in East direction ( $d_{E}$ )= 5 km,

velocity in N35E(v) = 2 m / s, time taken(t) = 90 min = 5400 seconds,
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Firstly, find the displacement in N35E so

Displacement = Velocity × time,

$d_{NE}$ = 2 × 5400 = 10800 meters or 10.8 km

Now by using Pythagoras' theorem
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$d_{S}$ = $\sqrt{d^{2} _{NE}- d^{2} _{E } }$
$d_{S}$ = $\sqrt{10.8^{2}-5^{2} }$

$d_{S}$ = 9.57 km

Therefore, the distance of the boat from the home (D) = $d_S}$ - $D_S}$

D = 9.57 - 6.5;

D = 3.07 Km

To know more about Relative velocity:

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1 year ago

The Hall effect can be used to calculate the charge-carrier number density in a conductor. If a conductor carrying a current of

goldfiish [28.3K]

Answer:

$6.6*10^{27}e/m^3$

Explanation:

When we are dealing with Hall voltage, it is necessary to have the values of the current, the magnetic field, the length, the area and the number of carriers at hand. The Hall voltage equation is given by, $V_h = \frac{iB}{neL}$