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Tasya [4]
3 years ago
9

Honeybees acquire a positive charge while flying through the air. The rapid motion of the wings through the air provides the "fr

iction" to strip charges off the bee, just like running a comb through your hair.Assume that a bee has acquired a charge of 12 pC(1 pico Coulomb = 10-12 C), and is hovering 1 mm above a pollengrain, which has a charge of -0.01 pC. Treating both the bee and pollen as pointchargesa. What is the force on the pollen grain?b. If the pollen grain’s mass is 3.8 x 10-9 g, is the forcesufficient to lift thegrain?c. Does the pollen have to be negatively charged to be attracted tothe bee?Explain.
Physics
1 answer:
Natali5045456 [20]3 years ago
3 0
Yikes i have no clue
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Answer:

2.63 x 10^18

Explanation:

A = 1 cm^2 = 1 x 10^-4 m^2

λ = 10,000 nm = 10,000 x 10^-9 m = 10^-5 m

T = 37 degree C = 37 + 273 = 310 k

Energy of each photon = h c / λ

where, h is the Plank's constant and c be the velocity of light

Energy of each photon = (6.63 x 10^-34 x 3 x 10^8) / 10^-5 = 1.989 x 10^-20 J

Energy radiated per unit time = σ A T^4

Where, σ is Stefan's constant

Energy radiated per unit time = 5.67 x 10^-8 x 10^-4 x 310^4 = 0.05236 J

Number of photons per second = Energy radiated per unit time / Energy of  

                                                                                               each photon

Number of photons per second = 0.05236 / (1.989 x 10^-20) = 2.63 x 10^18

4 0
3 years ago
The annoying sound from a mosquito is produced when it beats its wings at the average rate of 600 wingbeats per second. What is
podryga [215]
Frequency is given by the formula cycles÷seconds

So if the mosquito can complete 600 cycles in one second, our formula will be

f=600÷1
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The frequency is 600 Hz
6 0
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sergejj [24]

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A box slides to the right along a horizontal surface which is true about the friction force
mixer [17]

Answer:

It is a force in the direction of the motion that allows the box to move

Explanation:

7 0
2 years ago
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