PHYSICS HIGH SCHOOL

As Derrick is driving around town, he stops at a red-light. When the light turns green, he takes off and travels212m in 6.7 seconds. What is his average acceleration?

Answers

Answer 1

Answer:

Answer:

31.6

Explanation:

velocity÷ time

212 ÷ 6.7 = 31.6m/s

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The earth is the _____ largest planet.
third
fourth
fifth
sixth

Answers

Answer: The earth is the fifth largest planet in the solar system.

Explanation:

We know that,

Jupiter is the first largest planet, Saturn is the second largest planet, Uranus is the third largest planet, Neptune is the fourth largest planet, Earth is the fifth largest planet and Venus is the sixth largest planet in the solar system.

Hence, The earth is the fifth largest planet in the solar system.

The earth is the fifth largest planet in our solar system.

Which does more work, a force of 500 N moving through 10 m or a force of 100 N moving through 40 m?

Answers

Explanation:

To determine which force does more work, we can calculate the work done by each force using the formula:

Work = Force × Distance

For the first scenario:

Work = 500 N × 10 m = 5000 N·m

For the second scenario:

Work = 100 N × 40 m = 4000 N·m

Therefore, the force of 500 N moving through 10 m does more work, with a total of 5000 N·m.

A scientist wants to learn about Earth's oceans. Which of the following spheres should she most directly study? (2 points)
Oa
Atmosphere
Ob
Cryosphere
Oc
Geosphere
Od
Hydrosphere

Answers

Hydrosphere - all the waters on the earth’s surface.

A particle moves horizontally in uniform circular motion, over a horizontal xy plane. At one instant, it moves through the point at coordinates (2.50 m, 2.50 m) with a velocity of -5.00i hat m/s and an acceleration of -10.0j m/s2. What are the coordinates of the center of the circular path?

Answers

Answer:

(2.5,0)

Explanation:

The particle can be described by the following equations:

$x=Rsin(-\omega t)+2.5\ny=Rcos(-\omega t)\n(dx)/(dt)=-\omega Rcos(-\omega t)\n(dy)/(dt)=\omega Rsin(-\omega t)\n(d^2x)/(dt^2)=-\omega^2Rsin(-\omega t)\n(d^2y)/(dt^2)=-\omega^2Rcos(-\omega t)$

For R = 2.5, ω = 2 and t = 0:

$x=2.5\ny=2.5\n\n(dx)/(dt)=-5\n (d^2y)/(dt^2)=-10$

The center of the circle would be at point (2.5,0)

Two point charges are brought closer together, increasing the force between them by a factor of 25. By what factor was their separation decreased? In other words, if r1 is the original separation and r2 is the final separation, what is the ratio r1/r2?

Answers

Answer: 1/5

Explanation: The force between the two charge is inversely proportional to the square distance between charges so as the force increased a factor of 25 the distance can reduced divided by a factor of 5.

How does an antenna’s receiving circuit select electromagnetic radio waves of a certain frequency and reject all others?

Answers

An antenna’s receiving circuit select electromagnetic radio waves of a certain frequency and reject all others. This is because an antenna IS an electromagnetic radiator that creates an electromagnetic field that scatters from the transmitting antenna to the receiver’s antenna.

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