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Ipatiy [6.2K]
2 years ago
12

23 and 24 only please help!

Physics
1 answer:
Lilit [14]2 years ago
7 0

Answer:

23: Acceleration 24:1m/s^2

Explanation:

a = (v_f - v_i) /delta(t)\\a=(16-10)/6\\a=6/6\\a=1m/s^2

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Upon being struck by 240-nm photons, a metal ejects electrons with a maximum kinetic energy of 2.97 eV. What is the work functio
Neko [114]

Answer:

Work Function = 3.53 x 10⁻¹⁹ J = 2.2 eV

Explanation:

The work function of the metal metal can be found as follows:

Energy of Photon = Work Function + K.E

hc/λ = Work Function + K.E

Work Function = hc/λ - K.E

where,

h = Plank's Constant = 6.625 x 10⁻³⁴ J.s

c = speed of light  = 3 x 10⁸ m/s

λ = wavelength of photons = 240 nm = 2.4 x 10⁻⁷ m

K.E = Maximum Kinetic Energy = (2.97 eV)(1.6 x 10⁻¹⁹ J/1 eV) =  4.752 x 10⁻¹⁹ J

Therefore,

Work Function = (6.625 x 10⁻³⁴ J.s)(3 x 10⁸ m/s)/(2.4 x 10⁻⁷ m) - 4.752 x 10⁻¹⁹ J

Work Function = 8.281 x 10⁻¹⁹ J - 4.752 x 10⁻¹⁹ J

<u>Work Function = 3.53 x 10⁻¹⁹ J = 2.2 eV</u>

4 0
2 years ago
The velocity of a proton emerging from a Van de Graaff accelerator is 25.0% of the speed of light. What was the equivalent volta
LenaWriter [7]

Explanation:

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8 0
3 years ago
A circular area with a radius of 6.00 cm lies in the xy-plane. part a what is the magnitude of the magnetic flux through this ci
shtirl [24]
The magnetic flux through an area A is given by
\Phi = BA \cos \theta
where
B is the magnitude of the magnetic field
A is the area
\theta is the angle between the direction of B and the perpendicular to the surface A.

In our problem, the area lies in the x-y plane, while B is in the z direction, this means that B and the perpendicular to A are parallel, so \theta=0 and \cos \theta=1, so we can rewrite the formula as
\Phi = BA

We can calculate the area starting from the radius:
A= \pi r^2 = \pi (0.06 m)^2 = 0.011 m^2
And then using the intensity of the magnetic field given by the problem, B=0.290 T, we find the magnetic flux:
\Phi = BA=(0.290 T)(0.011 m^2)=3.2 \cdot 10^{-3}Wb

3 0
3 years ago
A cheetah runs at a velocity of 29 m/s [N]. If it runs 8.4s ,what is it’s displacement?
vovikov84 [41]

Velocity = displacement / time

displacement  = velocity × time

  d =                    29 ms⁻¹ ˣ  8.4 s

   d =                    243.6 m                  


6 0
3 years ago
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devlian [24]
Since friction is something rubbing against each-other with resistance the answers would be... b, and e
3 0
3 years ago
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