Physics Answers

Indicate the best guideline for the prevention of slippage on belt drives.

Pneumatics and hydraulics involve cylinders with different diameters and surface areas. These cylinders are connected by means of tubes or pipes.The system is filled with liquid. The force transferred by the piston rod depends directly on:

How important is following the procedures in operating volmeter and ammeter properly?

One electron and one proton of a hydrogen atom are at a distance of 2.2✕10−11m apart. What is the potential energy, in joules, of the electron in the proton’s field?

Juliana was observing an ant that crawled along a tabletop. With a piece of chalk she followed its path. She determined the ant’s displacement using a ruler. The displacements were as follows: 7 cm West, then 4 cm North, 7cm East, and finally 4 cm South. How far is the ant from its starting point? 

A spring 20cm long is stretched to 25cm by a load of 50N. What will be it's length when stretched by 100N assuming that the elastic limit is not reached

One electron and one proton of a hydrogen atom are at a distance of 2.2✕10−11m apart. What is the potential energy, in joules, of the electron in the proton’s field?

1. Electron and proton are placed at two different locations (one charge at each location). The locations have the same electric potential. Do these charges have the same electric potential energy?

a. Yes, if the electric potentials at the two locations are the same, the electric potential energies are also the same, regardless of the sign and magnitude of the charges placed at these locations.

b. No, because the electric potential energy EPE at a given location depends on the charge placed at that location as well as the electric potential V.

c. Both A and B

d. None of the above

2. Two electric charges are separated by 1.5 m (q1=-3.70µC and q2=+5.10µC). Find the electric potential midway between them.

a. 9.11𝑥10⁴𝑉

c. 7.11𝑥10⁴𝑉

b. 8.11 𝑥10⁴𝑉

d. 6.11𝑥10⁴𝑉

1. A proton is enclosed by a closed Gaussian surface. Find the magnitude of the electric flux through it.

a. 1.67x10⁻¹⁰ b. 1.82x10⁻¹² c. 1.91x10⁻⁸

2. An electric charge has a magnitude of 1.5x10−19𝐶 is enclosed in a sphere. Find the electric flux through this surface.

a. 1.69x10⁻⁸ b. 1.59x10⁻⁸ c.1.49x10⁻⁸

3. The magnitude of electric flux is the same throughout the Gaussian surface. Is the statement CORRECT?

a. Yes b. No c. Maybe

4. An electric field passes through a surface produces an electric flux which has a magnitude of 46^N.m(2)/C. Find the magnitude of the electric field if the surface area is 0.04𝑚².

a. 1.64 N/C b.1.74 N/C c. 1.84 N/C

5. An electric field (E=6.2N/C) passes through a flat surface area(0.50𝑚²) with an angle of 60˚. What will be the magnitude of the electric flux?

a. 1.6^N.m(2)/𝐶 b. 2.6^N.m(2)/𝐶 c. 3.6^N.m(2)/𝐶

How much power is needed to lift a 4.5 kg object to a height of 3.0 m in 12 s?