3. Specify the wrong sentences.

Physics

1 answer:

soldi70 [24.7K]2 years ago

4 0

Answer:

a: false

b: True

c: i dont know

Explanation:

You might be interested in

You have to run 2.2 miles in track. How far is this in feet? Note: There are

Romashka [77]

Answer: B

Explanation: This can be easily done by inputting 5280 * 2.2.

3 0

3 years ago

Read 2 more answers

One 10.0 Ω resistor is wired in series with two 10.0 Ω resistors in parallel. A 45.0 V battery supplies power to the circuit. Wh

RideAnS [48]

The answer you are looking for 3.0 A

4 0

3 years ago

Read 2 more answers

This question relates to the practicality of searching for intelligent life in other solar systems by detecting their radio broa

Montano1993 [528]

Answer:

$2.77287\times 10^{15}\ m$

Explanation:

P = Power = 50 kW

n = Number of photons per second

h = Planck's constant = $6.626\times 10^{-34}\ m^2kg/s$

$\nu$ = Frequency = 781 kHz

r = Distance at which the photon intensity is i = 1 photon/m²

Power is given by

$P=nh\nu\\\Rightarrow n=\dfrac{P}{h\nu}\\\Rightarrow n=\dfrac{50000}{6.626\times 10^{-34}\times 781000}\\\Rightarrow n=9.66201\times 10^{31}\ photons/s$

Photon intensity is given by

$i=\dfrac{n}{4\pi r^2}\\\Rightarrow 1=\dfrac{9.66201\times 10^{31}}{4\pi r^2}\\\Rightarrow r=\sqrt{\dfrac{9.66201\times 10^{31}}{4\pi}}\\\Rightarrow r=2.77287\times 10^{15}\ m$