PHYSICS HIGH SCHOOL

if two wires run parallel and the current passes through both wires in the same direction, which happens to the wires?

Answers

Answer 1
Answer:

Answer:

attracts each other

Explanation:

By the use of fleming's left hand rule, the direction of force is such that the both the wires attract each other.
Answer 2
Answer: They both create magnetic field around each wire. The resulting magnetic field causes attraction between the wires.

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b. gamma rays
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Answers

The answer is B, Gamma rays.

A runner is at the starting line and hears the starting gun. He starts running from rest with a constant acceleration ai = 0.53 m/s2. He crosses the finish line at d = 100 m and then begins slowing down. It takes him a time interval tr to cross the finish line. It takes him a time interval ts = 7.5 s to return to rest after crossing the finish line. Use the given coordinate system where x is positive to the right. a)Enter an expression for the time, tr, it takes for the runner to cross the finish line, in terms of d and ai

Answers

To find the time, tr, it takes for the runner to cross the finish line, we can use one of the kinematic equations that relate displacement, initial velocity, acceleration, and time. Since the runner starts from rest, his initial velocity is zero, so we can use the equation:

Δx=v0​t+21​at2

where Δx is the displacement, v0​ is the initial velocity, a is the acceleration, and t is the time. Plugging in the given values of Δx=d, v0​=0, and a=ai​, we get:

d=0+21​ai​t2

Solving for t, we obtain:

t=ai​2d​​

This is the expression for the time, tr, it takes for the runner to cross the finish line, in terms of d and ai.

Which of these causes summer in the northern hemisphere?The Sun is closer to Earth during the summer.

The northern hemisphere receives more direct sunlight during the summer.

Earth's northern axis is tilted away from the Sun during the summer.

The North Pole is tilted away from the Sun during the summer.

Answers

Answer:

The northern hemisphere receives more direct sunlight during the summer.

How dense the medium is in the compression part of the wave, and how

Answers

How dense the medium is in the compression part of the wave and how rare the medium is in the rarefaction part of the wave is a measure of the longitudinal wave's amplitude.

What is the best angle for maximum height and air time? explain why you think this is so.

Answers

Answer: 90 degrees

Explanation:

The projectile will have the greatest air time and height when the launch is the most vertical. At 90 degrees, the launch is all vertical.

In an elements square on the periodic table the number with the number greatest value represent the

Answers

The atomic mass is the greatest number but it depends on the element for the number
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