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2 years ago

Have scientists discovered a fifth fundamental force of nature?

1 answer:

5 0

Hi , recent findings indicating the possible discovery of a previously unknown subatomic particle may be evidence of a fith fundamental force of nature.

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An electron is accelerated through a potential difference of 3.1 kV and directed into a region between two parallel plates separ

Lapatulllka [165]

Answer: 178.25*10^-6 T

Explanation: In order to solve this problem we have to take into account the equilibrium between the electric and magnetic forces in the electron, so it is given by:

Fm=evB

Fe=eE so

evB=eE the we have

v=E/B

Firsly we calculate the velocity of the electron before to get the parallel plates at 100V

eΔV=1/2*m*v^2 then

v=(2*eΔV/m)^1/2

v=(2*1.6*10^-19*3.1*10^3/9.1*10^-31)^1/2=33 *10^6 m/s

Then we can calculate B

B=E/v E.d=V where d is the separation between the plates and V is equal a 100V

B=V/(d*v)=100/(17*10^-3*33 *10^6)=178.25*10^-6 T

3 0

3 years ago

Red light of wavelength 633 nm from a helium-neon laser passes through a slit 0.360 mm wide. The diffraction pattern is observed

Bumek [7]

Answer:

a) 0.0130 m

b') w' = =6.46*10^{-3] m

Explanation:

given data:

\lambda of light = 633 nm

width of siit a =0.360 mm

distance from screen = 3.75 m

a) the first minima is located at

$sin\theta = \frac{\lambda}{a}$

= $= \frac{633 *10^{-9}}{.360*10^{-3}}$

$\theta = 0.100$

$y_1 = dtan\theta_1 = 3.75*tan(0.100) = 6.54 *10^{-3} m$

with of central fringe = 2y_1 = 2*6.54 *10^{-3} = 0.0130 m

width of the first bright fringe on either side of the central one = $w' = y_2 -y_1$

calculation for y_2

$sin\theta = 2\frac{\lambda}{a}$

= $= 2*\frac{633 *10^{-9}}{.360*10^{-3}}$

$\theta = 2*0.100 = 0.200$

$y_2 = dtan\theta_1 = 3.75*tan(0.200) =0.0130 m$

$w' = 0.0130 -6.54 *10^{-3}$

w' = =6.46*10^{-3] m

6 0

2 years ago

Two forces are acting on a 2.0 kg object that moves with acceleration 6.0 m/s2 in the positive y-direction. If one of the forces

Strike441 [17]

Answer:

12N

Explanation:

We are given that one of the forces are acting only in the horizontal x-direction. As a force must be applied on an object of mass in order to cause acceleration, the 6.0ms^-2 acceleration is due to the non-horizontal force acting on the 2.0kg object.

Using Newton's Second Law of motion; we know that for a constant mass, force is equal to mass times acceleration, F=ma.

Assuming the other force is acting only in the vertical direction (question doesn't specify, thus we are finding the minimum force to cause this acceleration):

F= 2.0kg * 6.0ms^-2

F=12.0 kgms^-2

F=12 N

3 0

2 years ago

What movements of water has the greatest effect on the growth of producers

kolbaska11 [484]

The movement of water that has the greatest effect on the growth of producers is upwelling.

Upwelling is a rising of a liquid. The reason upwelling is much better for producers is because it is a slow rising in the water level, preventing erosion to the topsoil and still giving the necessary amount of water and nutrients the producers need.

Thank you for your question! I hope this helped! Have an amazing day and feel free to let me know if you need any more help with anything :D

5 0

2 years ago

John realized that his orchard has been invaded by certain harmful invasive plants. These plants are consuming all the soil nutr

Dovator [93]

John used smothering as the method to control the harmful invasive plants in his orchard. Smothering is an example of a manual method of control and it works best in a small population of invasive species. Smothering involves covering the invasive species with a barrier that is highly impenetrable for one growing season in order to prevent these species from thriving in the environment.

7 0

3 years ago