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3 years ago

1. In an experiment, a positively charged oil droplet weighing 6.5 x 10-15 N is held stationary

Physics

1 answer:

blagie [28]3 years ago

3 0

The charge on the droplet must be $1.2\cdot 10^{-18} C$

Explanation:

In order for the oil droplet to be in equilibrium, the force of gravity acting on it (the weight, acting downward) must be equal to the electrical force acting upward.

The gravitational force is:

$F_g = 6.5 \cdot 10^{-15} N$

which is equivalent to the weight of the droplet.

The electric force is given by:

$F_E = qE$

where

q is the charge on the oil droplet

$E=5.3\cdot 10^3 N/C$ is the magnitude of the electric field

Since the two forces must be equal,

$F_G = F_E\\F_G = qE$

And solving for q,

$q=\frac{F_G}{E}=\frac{6.5\cdot 10^{-15} N}{5.3\cdot 10^3}=1.2\cdot 10^{-18} C$

Learn more about gravitational force and electric force:

brainly.com/question/1724648

brainly.com/question/12785992

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3 years ago

A red photon has a wavelength of 650 nm. An ultraviolet photon has a wavelength of 250 nm. The energy of an ultraviolet photon i

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The energy of an ultraviolet photon is 2.6 times greater than a red photon.

<h3>Energy of a photon</h3>

The energy of a given photon of light is calculated using the wavelength and the speed of light.

<h3>Energy of a red photon</h3>

The energy of the a red photon at the given wavelength is calculated as follows;

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<h3>Energy of an ultraviolet photon</h3>

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Thus, the energy of an ultraviolet photon is 2.6 times greater than a red photon.

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3 years ago

supposed the Kingfisher Dives with an average speed of 4.6 m / s for 1.4 seconds before hitting the water. What is the height fr

timama [110]

Answer:

h = 1.07 m

Explanation:

It is given that,

The average sped of the kingfisher, v = 4.6 m/s

Time, t = 1.4 s

Final speed, v = 0 (as it hits the water)

We need to find the height from which the bird dove. Let the height is h. According to the conservation of energy.

$mgh=\dfrac{1}{2}mv^2\\\\h=\dfrac{v^2}{2g}\\\\h=\dfrac{(4.6)^2}{2\times 9.8}\\\\h=1.07\ m$

So, the bird dove from a height of 1.07 m.

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3 years ago

THIS IS DUE IN 5 MINUTES IM BEGGING YOU PLEASE ANSWER

Archy [21]

Answer:

the answer is A or 900

Explanation:

what u have to do is add all the forces together and then u get ur answer.

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3 years ago