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3 years ago

How would the force of a test charge change if the electric field is doubled?

Physics

2 answers:

Stolb23 [73]3 years ago

7 0

The force would double.

nignag [31]3 years ago

4 0

Answer:

The force would double.

Explanation:

The region around a charged particle in which another charged particle experiences a force of attraction or repulsion is called electric field.

The force experienced by per unit test charge when placed in an electric field is called the electric field strength.

Electric field strength = Force / test charge

Force = test charge x electric field strength

if the electric field is doubled, then force also be doubled.

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When the leaves are __________________, they fall straight down.

konstantin123 [22]

Answer:Done doing there job, in the winter they have a break

Explanation:

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3 years ago

If the humidity in a room of volume 410 m3 at 25 ∘C is 70%, what mass of water can still evaporate from an open pan? Express you

Keith_Richards [23]

Answer:

$m=1864.68\ g$

Explanation:

Given:

volume of air in the room, $V=410\ m^3$

temperature of the room, $T=25+273=298\ K$

Saturation water vapor pressure at any temperature T K is given as:

$p_{sw}=\frac{e^{(77.3450 + 0.0057\times T - \frac{ 7235}{T} )}}{T^{8.2}}$

putting T=298 K we have

$p_{sw}=3130\ Pa$

The no. of moles of water molecules that this volume of air can hold is:

Using Ideal gas law,

$P.V=n.R.T$

$n=\frac{P_{sw}.V}{R.T}$

$n=\frac{3130\times 410}{8.314\times 298}$

$n=518\ moles$ is the maximum capacity of the given volume of air to hold the moisture.

Currently we have 80% of n, so the mass of 20% of n:

$m=(20\%\ of\ n)\times M}$

where;

M= molecular mass of water

$m=0.2\times 518\times 18$

$m=1864.68\ g$ is the mass of water that can vaporize further.

3 0

3 years ago

Dean Potter is known for slacklinging across a 915 metter deep ravine in Yosemite National Park with no safety gear. If his mass

Natasha2012 [34]

Explanation:

answer 689910

M x G x H

mass = 77

G= 9.8

Meter = 915 this is the height

77 x 9.8= 754.6

754.6 X 915 = 689910 J

8 0

3 years ago

What are momentum and impulse?

dybincka [34]

Momentum definition: the quantity of motion of a moving body, measured as a product of its mass and velocity.

Impulse definition: change of momentum of an object when the object is acted upon by a force for an interval of time

These are the definitions.

Hope this helps!

- Melanie

3 0

3 years ago

Read 2 more answers

Ordinary glasses are worn in front of the eye and usually 2.00 cm in front of the eyeball. A certain person can see distant obje

Lelu [443]

Answer:

The focal length is 15.549 cm

The power of the lens is 0.0643 D

Solution:

As per the question:

The near point is 50.0 cm

Distance of the glasses from the eyeball, d = 2.00 cm

The near point of a normal human eye is 25 cm

Now,

The image distance, v' = 50.0 - 2.00 = 48.0 cm

The object distance, u' = 25.0 - 2.00 = 23.0 cm

Now, using the Lens maker formula to calculate the focal length:

$\frac{1}{f} = \frac{1}{u'} + \frac{1}{v'}$

$\frac{1}{f} = \frac{1}{48.0} + \frac{1}{23.0} = 0.0643$

f = 15.549 cm

Now, the power of the lens in diopters is given by:

$P = \frac{1}{f} = \frac{1}{15.549} = 0.0643 D$

7 0

3 years ago