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3 years ago

Select the correct answer.

Physics

2 answers:

Lemur [1.5K]3 years ago

8 0

Answer:

B.Temperature and density increase with layer thickness.

Explanation:

Serhud [2]3 years ago

5 0

Answer:

b hope this helps

Explanation:

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What force will a proton experience in a uniform electric field whose strength is 2.00 x 10^5 Newtons per Coulomb? *

Alenkasestr [34]

Answer: F =3.218 * 10^-11 N

Explanation: The relationship between electric field intensity and force is given by

F = Eq.

F= Force on electron

E = strength of electric field = 2*10^5

q= magnitude of proton charge = 1.609 * 10^-19c

F = 2* 10^5 * 1 609 * 10^-16

F = 3.218 * 10^-11 N

7 0

3 years ago

Two conductors are made of the same material and have the same length. Conductor A is a solid wire of diameter 0.79 mm. Conducto

Rufina [12.5K]

Answer:

Explanation:

Given

$D_a=0.79 mm$

$d_{ob}=1.4 mm$

$d_{ib}=0.91 mm$

and both have same length and material

$R=\frac{\rho L}{A}$

$A_a=\frac{\pi D_a^2}{4}$

$A_b=\frac{\pi d_{ob}^2\left ( 1-\left ( \frac{d_{ib}}{d_{ob}} \right )^2\right )}{4}$

$R_a=\frac{4\rho L}{\pi D_a^2}$

so $R\propto \frac{1}{D_a^2}$

Similarly $R_b\propto \frac{1}{d_{ob}^2\left ( 1-\left ( \frac{d_{ib}}{d_{ob}} \right )^2\right )}$

Thus $\frac{R_a}{R_b}=\frac{d_{ob}^2\left ( 1-\left ( \frac{d_{ib}}{d_{ob}} \right )^2\right )}{D_a^2}$

$\frac{R_a}{R_b}=\frac{1.4^2\times 0.5575}{0.79^2}$

$\frac{R_a}{R_b}=1.813$

6 0

3 years ago

I need help with this question

levacccp [35]

Option 3) a Soccer Ball

will travel the farthest distance.

6 0

3 years ago

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Train cars are coupled together by being bumped into one another. Suppose two loaded train cars are moving toward one another, t

zmey [24]

Answer:

+0.231 m/s

Explanation:

The problem can be solved by using the law of conservation of momentum. In fact, we have that the total momentum before the collision must be equal to the total momentum after the collision:

$p_i = p_f\\m_1 u_1 + m_2 u_2 = (m_1 + m_2)v$

where we have

m1 = 245000 kg is the mass of the first car

m2 = 57500 kg is the mass of the second car

u1 = 0.513 m/s is the initial velocity of the first car

u2 = -0.125 m/s is the initial velocity of the second car

v = ? is the final velocity of the two cars together, after the collision

Solving the equation for v, we find

$v=\frac{m_1 u_1 + m_2 u_2}{m_1 +m_2}=\frac{(245000 kg)(0.315 m/s)+(57500 kg)(-0.125 m/s)}{245000 kg+57500 kg}=+0.231 m/s$

And the direction (positive sign) is the same as the initial direction of the first car.

8 0

4 years ago

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Which type of wave requires a medium?

melamori03 [73]

The correct answer is option C. Sound wave

A sound wave is an example of a mechanical wave which requires a medium.

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3 years ago

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