Statie electricity refers to the transfer of _______

1 answer:

3 0

Static electricity is the result of an imbalance between negative and positive charges in an object. These charges can build up on the surface of an object until they find a way to be released or discharged. ... The rubbing of certain materials against one another can transfer negative charges, or electrons.

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Find the pressure exerted by a 3000 N crate that has an area of 2m squared

ipn [44]

Pressure = Force/ Area = 3000/2 = 1500 pascal.

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2 years ago

A wave will go faster through a liquid at ____________ temperatures

cupoosta [38]

<h3>Answer;</h3>

Higher temperatures

A wave will go faster through a liquid at higher temperatures

<h3>Explanation;</h3>

Mechanical waves are types of waves that require a material medium for transmission. An example of mechanical wave is the sound wave whose transmission occurs in medium such as solids, liquids and gases.

The transmission of mechanical waves involves vibration of particles through the medium of transmission, thus transfer of energy from one point to another. The vibration of particle may be in the form of a longitudinal wave or a transverse wave.

Increasing the temperature in a medium increases the kinetic energy of the particles in the medium and thus increasing the speed at which the particles vibrates and thus aiding a faster transmission of a wave.

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3 years ago

Read 2 more answers

What is number 30,31 in this picture?

Maslowich

On question 30, that is a displacement- time graph (DT). On this type of graph the gradient is equal to the velocity. B has the steepest gradient, then A and finally C

Now velocity is a vector quantity so it has a direction and speed ( speed doesn't have a fixed direction.)

on the DT graph im going to assume that movement B is a positive velocity with A and C being negative.
So by ranking these: A is the most negative, C is the least negative and B has to be the greatest as it is the only positive velocity.

Q31, The same type of graph is present, by looking at the gradients we can rank the largest and smallest velocities- speeds in the case of the question.
i'll skip my working out as its the same as before:

C, B, A and then D

the same idea as on Q30 applies to Q31 part b,

D,C,B then A

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3 years ago

Determine the wavelength of incident electromagnetic radiation required to cause an electron transition from the n = 5 to the n

ollegr [7]

The correct answer is: wavelength = 4562 nm

Explanation:

Rydberg's formula is given as:
$\frac{1}{\lambda} = R[ \frac{1}{n_1^2} - \frac{1}{n_2^2} ]$ --- (1)

Where
R = Rydberg's constant = 1.096 * 10^7 per meter
$n_1$ = 5
$n_2$ = 7

λ = Wavelength

Plug in the values in (1):

(1)=> $\frac{1}{\lambda} = (1.096 * 10^7)[ \frac{1}{5^2} - \frac{1}{7^2} ]$

$\frac{1}{\lambda} = (1.096 * 10^7)[ 0.04 - 0.020 ] \\ \lambda = \frac{1}{(1.096 * 10^7)[0.020 ]} \\ \lambda = 4562 nm$

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This is a green pigment in chloroplasts that traps light energy from the sun.

vovikov84 [41]

green pigment in the chloroplast is chlorophyll

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