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3 years ago

Which of these causes summer in the northern hemisphere?

Physics

1 answer:

MrRa [10]3 years ago

3 0

Answer:

The northern hemisphere receives more direct sunlight during the summer.

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A photon has momentum of magnitude 8.30×10−28 kg⋅m/s . Part APart complete What is the energy of this photon? Give your answer i

d1i1m1o1n [39]

Answer with Explanation:

We are given that

Momentum of photon= $8.3\times 10^{-28} kg.m/s$

a. We have to find the energy of this photon.

Speed of photon= $c=3\times 10^8 m/s$

We know that

Momentum=p= $\frac{h}{\lambda}$

Where

h= $6.63\times 10^{-34}$ J-s=Plank's constant

$\lambda=$ Wavelength of photon

$\lambda=\frac{h}{p}$

$\lambda=\frac{6.63\times 10^{-34}}{8.3\times 10^{-28}}$

$\lambda=7.99\times 10^{-7}$ m

$E=\frac{hc}{\lambda}$

$E=\frac{6.63\times 10^{-34}\times 3\times 10^8}{7.99\times 10^{-7}}$

$E=2.49\times 10^{-19}$ J

Hence, the energy of photon= $2.49\times 10^{-19}$ J

B.Energy of photon in electron volt= $\frac{2.49\times 10^{-19}}{1.6\times 10^{-19}}=1.55 eV$

Energy of photon= $1.55eV$

C.Wavelength of photon = $\lambda=7.99\times 10^{-7}m$

6 0

4 years ago

a person goes to his friends home at the speed of 30 km/h and comes back at the speed of 40 km/h. what was his average speed thr

Wewaii [24]

Let $d$ be the distance between the two houses. Considering the formula

$d=vt$

where $d$ is the distance, $v$ is the velocity and $t$ is the time, we can solve it for the time to get

$t=\dfrac{d}{v}$

So, the two trips take the following time:

$t_1 = \dfrac{d}{30},\quad t_2=\dfrac{d}{40}$

To get the average speed, we need to consider the two trips together. Globally, the person traveled a distance of $2d$ , and the global time is the sum of the two times. We have

$v=\dfrac{d_{TOT}}{t_{TOT}}=\dfrac{2d}{\frac{d}{30}+\frac{d}{40}}=\dfrac{2}{\frac{1}{30}+\frac{1}{40}}=\dfrac{2}{\frac{7}{120}}=\dfrac{240}{7}$

4 0

3 years ago

When spray is applied to a car, the paint has a negative charge and the surface of the car has a positive charge. Some processes

RUDIKE [14]

Answer:

Based on the properties electrically charged particles, we have that unlike charges attract and like charges repel each other. In order for proper application of an electrostatically negatively charged paint to be properly applied on the metal body surface of a vehicle, require that for attraction, the surface of the vehicle should be grounded and positively charged so as to effectively attract the negatively charged paint particles as it exits the nozzle, to form a strong attachment with the positively charged surface of the vehicle

Explanation:

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3 years ago

The potential difference between two points is 100 V. If a particle with a charge of 2 C is transported from one of these points

Aleonysh [2.5K]

Answer: 200 J

Explanation: In order to explain this we have consider that the work done in a electric field is given by:

Work= Q*ΔV=2*100=200J

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3 years ago

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What effect will a turning point have on an individuals life

ankoles [38]

Answer:

The turning points are those instants, moments or situations that happen in an absolutely unexpected way, as a result of which your life changes ... and nothing is the same as before.

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3 years ago

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