3 years ago

The output power of a solar panel is the rate of transfer of...?

Physics

1 answer:

gtnhenbr [62]3 years ago

5 0

Power is the rate of generating, moving, or using energy.

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X-rays are electromagnetic waves used to obtain images of bones. An x-ray machine produces x-ray waves with a frequency of 1.25

Brilliant_brown [7]

Answer:

$T=8\times 10^{-19}\ s$

Explanation:

Given that,

The frequency of x-ray is, $f=1.25\times 10^{18}\ Hz$

We need to find the time period of these x-rays. Let it is be T. We know that, the relation between f and T is given by :

T = 1/f

So,

$T=\dfrac{1}{1.25\times 10^{18}}\\\\=8\times 10^{-19}\ s$

So, the time period of these x-rays is equal to $8\times 10^{-19}\ s$ .

6 0

3 years ago

An object at free fall near the Earth’s surface experiences constant velocity.

mariarad [96]

False it accelerates.

7 0

4 years ago

The Hubble Space Telescope orbits the Earth at approximately 612,000m altitude. Its mass is 11,100 kg and the mass of earth is 5

nexus9112 [7]

Answer:

7.55 km/s

Explanation:

The force of gravity between the Earth and the Hubble Telescope corresponds to the centripetal force that keeps the telescope in uniform circular motion around the Earth:

$G\frac{mM}{R^2}=m\frac{v^2}{R}$

where

$G=6.67\cdot 10^{-11} m^3 kg^{-1} s^{-2}$ is the gravitational constant

$m=11,100 kg$ is the mass of the telescope

$M=5.97\cdot 10^{24} kg$ is the mass of the Earth

$R=r+h=6.38\cdot 10^6 m+612,000 m=6.99\cdot 10^6 m$ is the distance between the telescope and the Earth's centre (given by the sum of the Earth's radius, r, and the telescope altitude, h)