Calculate the amount of energy transferred when a 40w light bulb is left on for 30 minutes.

Physics

1 answer:

Alinara [238K]3 years ago

3 0

Answer:

E=72000J or 72kj

Explanation:

The formula is E=pt you need to convert your t from minutes to seconds before proceeding

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GarryVolchara [31]

Explanation:

Given that,

The pilot directs the aircraft to fly due north at 600km/h.

A side-wind blows at 100km/h towards the east.

We need to find the aircraft's resultant velocity. et it be v. It can be calculated as follows :

$v=\sqrt{600^2+100^2} \\\\v=608.27\ m/s$

For direction,

$\tan\theta=\dfrac{600}{100}\\\\\tan\theta=6\\\\\theta=\tan^{-1}(6)\\\\\theta=80.53^{\circ}$

So, the aircraft's resultant velocity is 608.27 km/h and it is at and angle of 80.53°.

7 0

3 years ago

A 64-kg base runner begins his slide into second base when he is moving at a speed of 3.4 m/s. The coefficient of friction betwe

levacccp [35]

First you need to find total mechanical energy which is kinetic energy+potential energy, or (1/2mv^2+mgh). Since there is no height, we can pretty much ignore the potential energy and just calculate the kinetic.

1/2mv^2=1/2(64)(3.4)^2= 369.92J. Since it says the speed is 0 at the end of the run, we can assume that all the mechanical energy was lost. Therefore, 369.92 J of energy was lost

6 0

3 years ago

In Young’s double-slit experiment using monochromatic light, the interference pattern consists of a central _____.

NNADVOKAT [17]

Answer:

In Young’s double-slit experiment using monochromatic light, the interference pattern consists of a central MAXIMUM.

Explanation:

In Young's double slit method of experiment we know that on the screen we have light of monochromatic source.

Due to this double slit system when light reaches to the screen there exist a finite path difference on the screen and which will create phase difference between two light reaches on the screen

It is given as

$\Delta \phi = \frac{2\pi}{\lambda}$ (Path difference)