Potential Energy: Two tiny particles having charges q1 = +56.0 nC and q2 = -46.0 nC are separated by 0.500 m and held in place, as shown in the figure. A third particle, having a charge of 54.0 nC is placed at the point A, which is 0.18 m to the left of q2. How much work is needed to move the third particle from point A to point B, which is 0.40 m to the left of q1. All the points in the figure lie on the same line. (k = 1/4??0 = 9.0 × 109 N ? m2/C2) 

Fill in the blank(s) with the appropriate word(s).


8.2 × 10-5 J

Physics & Space Science

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The orbits of most of the planets in our solar system have eccentricities close to zero

Indicate whether the statement is true or false

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A boat is floating in a small pond. The boat then sinks resting on the bottom, but the pond is so shallow that part of the boat is not submerged. What happens to the level of the pond?

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Physics & Space Science

Answer the following statement(s) true (T) or false (F)

1. An object can have a constant speed and still be accelerating. 2. An object’s acceleration vector always points in the direction that it is moving. 3. An object can have zero velocity (at an instant) and still be accelerating. 4. An object’s x-velocity can be positive at the same time that its x-acceleration is negative.

Physics & Space Science

Betelgeuse is a red supergiant star in the constellation Orion. It radiates heat at the rate of 2.70 × 1030 W and has a surface temperature of 3000 K

Assuming that it is a perfect emitter, what is the radius of Betelgeuse? The Stefan-Boltzmann constant is 5.670 × 10-8 W/m2 • K4. A) 7.80 × 1010 m B) 8.70 × 1010 m C) 1.40 × 1011 m D) 1.90 × 1011 m E) 2.16 × 1011 m

Physics & Space Science