Near the surface of the earth, objects in free fall (but not terminal velocity) experience

An electron initially 3.00 m from a nonconducting infinite sheet of uniformly distributed charge is fired toward the sheet. The

Cloud [144]

Answer:

$4.4443704375\times 10^{-18}\ C/m^2$

Explanation:

$\epsilon_0$ = Permittivity of free space = $8.85\times 10^{-12}\ F/m$

$\Delta l$ = Distance charge traveled = 2 m

v = Velocity of electron = 420 m/s

E = Electric field

$m_e$ = Mass of electron = $9.11\times 10^{-31}\ kg$

$q_e$ = Charge of electron = $1.6\times 10^{-19}\ C$

As the energy of the system is conserved we have

$q_eE\Delta l=\dfrac{1}{2}m_ev^2\\\Rightarrow E=\dfrac{1}{2}\dfrac{m_e}{q_e}\times \dfrac{v^2}{\Delta l}\\\Rightarrow E=\dfrac{1}{2}\dfrac{9.11\times 10^{-31}}{1.6\times 10^{-19}}\times \dfrac{420^2}{2}\\\Rightarrow E=2.51094375\times 10^{-7}\ N/C$

For an infinite non conducting sheet electric field is given by

$E=\dfrac{\sigma}{2\epsilon}\\\Rightarrow \sigma=2E\epsilon\\\Rightarrow \sigma=2\times 2.51094375\times 10^{-7}\times 8.85\times 10^{-12}\\\Rightarrow \sigma=4.4443704375\times 10^{-18}\ C/m^2$

The surface charge density is $4.4443704375\times 10^{-18}\ C/m^2$

5 0

3 years ago

14. A spoon is placed in a cup of hot

sweet [91]

Answer:

Specific heats

Explanation:

6 0

3 years ago

Question is in the picture!

raketka [301]

Any change in velocity is called an acceleration. The rock is experiencing the gravitational force from the earth, accelerating it towards the ground.

8 0

4 years ago

Two forces act on an object. The first force has a magnitude of 15.0 N15.0 N and is oriented 58.0°58.0° counterclockwise from th

SIZIF [17.4K]

Answer:

F = 33.12 N

Explanation:

given,

first force = 15 N is oriented at 58.0° counterclockwise

second force = (−19.0 N,18.5 N)

x-component of first force = 15 cos 58.0° = 7.95 N

y-component of second force = 15 sin 58.0° = 12.72 N

second component

now,

F netx = 7.95 - 19 = -11.05 N

F nety = 12.72 + 18.5 = 31.22 N

$F=\sqrt{(-11.05)^2+31.22^2}$

F = 33.12 N

$tan \theta = -\dfrac{31.22}{11.05}$

θ = -70.51°

3 0

4 years ago

4. List 3 detailed examples of Newton's 3rd Law.

slamgirl [31]

Answer: If one billiard ball hits another, the second will move with the same force as the first.

A child wants to jump to climb a tree (reaction), he must push the ground to propel himself (action).

A man deflates a balloon; the force with which the air comes out causes the balloon to move from one side to the other.

Explanation:

7 0

3 years ago

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