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Vesna [10]
3 years ago
8

Which material will heat up the most quickly if placed near a heat source

Physics
1 answer:
Natali [406]3 years ago
8 0

Answer:

metal

Explanation:

metal heats up the fastest when near a hot source

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Find the least frequency of incident light that will knock electrons out of the surface of a metal with a work function of 3eV.​
mixer [17]

Answer:

The frequency must be: 725\,\,10^{12} \,Hz

Explanation:

If the work function of the metal (\phi) is 3 eV, then we can use the formula for the kinetic energy of an ejected electron:

KE= h*f-\phi

considering for the minimum KE = 0, and using the Plank constant h in eV s as: 4.14 * 10 ^(-15) eV s, to solve for the frequency:

h*f=\phi\\4.14*10^{-15} * f = 3\\f=3*10^{15}  /4.14\,\,\frac{1}{s} \\f=725\,10^{12} \,Hz

3 0
3 years ago
Alpha Particles
UNO [17]

Alpha > Beta > Gamma

Explanation:

Alpha particles are the heaviest radiation whereas gamma rays are the lightest.

An alpha particle closely resembles a helium particle.

Beta particles are similar to electrons in nature

Gamma rays have no weight. They are just rays.

  Alpha particles have a mass of  4.0012amu which is that of helium

  Beta particles have a mass of 5.5 x 10⁻⁴ amu

   Gamma rays have no mass.

Learn more:

Electromagnetic radiations brainly.com/question/6818046

#learnwithBrainly

7 0
3 years ago
Read 2 more answers
Distinguish the difference in mass and weight
levacccp [35]
Ok to distinguish the difference you just find out why there's science lol.......anyways.....Mass is the amount of space being taken up in a certain place (or possibly all the world) and weight is the heaviness of an person or thing kk??? also if my answer was best, plzz give brainliest (trust me i need it) Have a great day and Christmas (if u celebrate it)!!
3 0
3 years ago
A 5.0-cm by 7.0-cm rectangular coil has 100 turns. Its axis makes an angle of 65° with a uniform magnetic field of 0.55 T. What
kotegsom [21]

Answer:

0.0814 Wb

Explanation:

L = length of the rectangular coil = 5 cm = 0.05 m

w = width of rectangular coil = 7 cm = 0.07 m

A = Area of the coil = L w = 0.05 x 0.07 = 35 x 10⁻⁴ m²

B = magnitude of uniform magnetic field = 0.55 T

θ = angle of axis of coil with magnetic field = 65°

Magnetic flux through the coil is given as

Φ = N B A Cosθ

Φ = (100) (0.55) (35 x 10⁻⁴ ) Cos65

Φ = 0.0814 Wb

4 0
4 years ago
In the photoelectric effect, it is found that incident photons with energy 5.00ev will produce electrons with a maximum kinetic
Yakvenalex [24]
From Literature:

The amount of energy in the photons is given by this equation:

E = hf

where E = energy
            h = Planck's constant = 6.63 * 10^-34 Joule seconds
            f = frequency of the light, Hz

Given:

E= 3.00 eV and Planck's constant 

To solve for the frequency, E = 3.00 eV

1 electronvolt = 1.60218 x 10^-19 Joules

3 * 1.60218 x 10^-19 Joules = 6.63 * 10^-34 Joule seconds * f 
f = 7.25 x 10^14 /second or hertz

Therefore, the threshold frequency of the material is 7.25 x 10^14 Hertz.


7 0
4 years ago
Read 2 more answers
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