3 years ago

Which of these can be used to induce a current in a closed circuit without the

Physics

1 answer:

blsea [12.9K]3 years ago

8 0

I believe it is D a magnetic field

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You are given two positively charged particles, of equal magnitude, separated by a distance, "d". What will happen to the force

gizmo_the_mogwai [7]

force goes as 1/d^2 ... (2d)^2 => 4d^2 ...

C) decrease by a factor of four

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It has been suggested that a heat engine could be developed that made use of the fact that the temperature several hundred meter

lesantik [10]

Answer:

efficiency = 5.4%

Explanation:

Efficiency of heat engine is given as

$\eta = \frac{W}{Q_{in}}$

now we will have

$W = Q_1 - Q_2$

so we will have

$\eta = 1 - \frac{Q_2}{Q_1}$

now we know that

$\frac{Q_2}{Q_1} = \frac{T_2}{T_1}$

so we have

$\eta = 1 - \frac{T_2}{T_1}$

$\eta = 1 - \frac{273+6}{273+22}$

$\eta = 0.054$

so efficiency is 5.4%

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Who was Christa McAuliffe and what happened this year to make her dream come true?

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On July 19th, 1985 Christa McAuliffe was selected as the first teacher to go to space by NASA. Her dream was to be the first teacher to go to space with all her lessons. Her daughter keeps her dream alive today by setting up 40 schools called the McAuliffe Centre.

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bearhunter [10]

I may be wrong but A

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At takeoff, the horizontal and vertical velocity of long jumper are 57.8 m/s and 5.6 m/s respectively. What is the resultant vel

Lady bird [3.3K]

Apply the Pythagorean theorem to get the resultant velocity:

V = $\sqrt{Vx^{2}+Vy^{2}}$

Given values:

Vx = 57.8m/s

Vy = 5.6m/s

Plug in and solve for V:

V = 58.1m/s

EDIT: Let's get the direction of the resultant velocity as well.

This equation will give the angle of the velocity as measured off of the ground:

θ = tan⁻¹(Vy/Vx)

Again, the given values are:

Vx = 57.8m/s

Vy = 5.6m/s

Plug in the values and solve for the angle θ:

θ = tan⁻¹(5.6/57.8)

θ = 5.5°

The resultant velocity is oriented 5.5° off the ground.

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3 years ago