Questions from Modern Physics

Q: A negative charge of -0.550 µC exerts an upward

A negative charge of -0.550 µC exerts an upward 0.600-N force on an unknown charge that is located 0.300 m directly below the first charge. What are (a). the value of the unknown charge (magnitude an...

Q: A lonely party balloon with a volume of 2.40 L

A lonely party balloon with a volume of 2.40 L and containing 0.100 mol of air is left behind to drift in the temporarily uninhabited and depressurized International Space Station. Sunlight coming thr...

Q: Three point charges are arranged on a line. Charge q3 =

Three point charges are arranged on a line. Charge q3 = +5.00 nC and is at the origin. Charge q2 = -3.00 nC and is at x = +4.00 cm. Charge q1 is at x = +2.00 cm. What is q1 (magnitude and sign) if the...

Q: An ideal Carnot engine operates between 5000C and 1000C with a heat

An ideal Carnot engine operates between 5000C and 1000C with a heat input of 250 J per cycle. (a). How much heat is delivered to the cold reservoir in each cycle? (b). What minimum number of cycles...

Q: A uniform electric field is directed due east. Point B is

A uniform electric field is directed due east. Point B is 2.00 m west of point A, point C is 2.00 m east of point A, and point D is 2.00 m south of A. For each point, B, C, and D, is the potential at...

Q: A cube has sides of length L = 0.300 m

A cube has sides of length L = 0.300 m. One corner is at the origin (Fig. E22.6). The nonuniform electric field is given by

Q: In Example 21.4, what is the net force (

In Example 21.4, what is the net force (magnitude and direction) on charge q1 exerted by the other two charges?

Q: Two small spheres spaced 20.0 cm apart have equal charge

Two small spheres spaced 20.0 cm apart have equal charge. How many excess electrons must be present on each sphere if the magnitude of the force of repulsion between them is 3.33 × 10-21 N?

Q: An average human weighs about 650 N. If each of two

An average human weighs about 650 N. If each of two average humans could carry 1.0 C of excess charge, one positive and one negative, how far apart would they have to be for the electric attraction be...

Q: A particle has charge -5.00 nC. (

A particle has charge -5.00 nC. (a). Find the magnitude and direction of the electric field due to this particle at a point 0.250 m directly above it. (b). At what distance from this particle does i...