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2 years ago

A toy rocket fires its engines to launch it straight up from rest. After a short time, the engine turns off and the

Physics

1 answer:

madreJ [45]2 years ago

8 0

Answer:

at 10 seconds.. b/c that's when the velocity stops increasing..

Explanation:

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At noon on a clear day, sunlight reaches the earth\'s surface at Madison, Wisconsin, with an average intensity of approximately

Dmitrij [34]

Intensity of sunlight at given position is defined as power received per unit area

so here we can say

$I = 2 kJ/s*m^2$

area on which photons are received is given as

$A = 4.80 cm^2 = 4.80 * 10^-4 m^2$

now we can find the power received due to sunlight

$P = I*A$

$P = 2* 10^3 * 4.80 * 10^-4$

$P = 0.96 Watt$

now we can say this power is due to photons that strikes on surface of earth

so here we can say

$P = N\frac{hc}{\lambda}$

given here that

$\lambda = 510 nm$

$0.96 = N\frac{6.6 * 10^{-34}* 3 * 10^8}{510*10^{-9}}$

$0.96 = N * 3.88 * 10^{-19}$

$N = \frac{0.96}{3.88*10^{-19}}$

$N = 2.47 * 10^{18}$

so it will strike 2.47 * 10^18 photons on given area per second

3 0

3 years ago

Which of the following distinguishes electromagnetic waves from mechanical waves

Ivan

Answer:

Explanation:

1. Mechanical waves require material medium for their propagation while electromagnetic waves do not require material medium for their propagation.

2. Mechanical waves can either be transverse or longitudinal while electromagnetic waves are transverse.(Transverse waves are waves in which the vibration of the particules of the medium is perpendicular to the direction of the motion of wave. E.g water waves, waves of a plucked string and all electromagnetic waves RIVUXG . Longitudinal waves are waves whose vibration are parallel to the direction of the motion of the medium e.g waves in strings, sound waves.e.t.c)

6 0

2 years ago

PLEASE HELP

stepladder [879]

Answer:

here's the answer to your question hope it helps you

Explanation:

b. is the answer

3 0

1 year ago

Read 2 more answers

a wall of glass 2cm thickhas inside temperature of 30°C,outside temperature of15°C.how much heat is flowing through the glass(k=

kenny6666 [7]

Answer:46.5

Explanation:is the topical formula of F= 30x+15

5 0

3 years ago

When I mix 200g of water at 10°C with 300g of water at 55°C, what is the final temperature of the mixture?

Anarel [89]

Answer:

4th of August is the

Explanation:

5th and then I can help out by getting

7 0

2 years ago