A hydrogen atom consists of a proton and an electron. If the orbital radius of the electron increases, the electric potential energy of the atom:
A) decreases
B) remains the same
C) increases
D) depends on the zero point of the potential
What is the net charge on 1.0 kg of protons? (e = 1.60 x 10^-19 C)
A) 1.0 C
B) 1000 C
C) 9.6 x 10^7 C
D) 6.0 x 10^26 C
E) 6.0 x 10^23 C
If an object is charged to -7.00 uC, how many electrons are transferred to it during this process? (e = 1.60 x 10^-19 C)
A) 4.38 x 10^13
B) 7.0
C) 1.12 x 10^-18
D) 43.8
An asteroid of mass 58,000 kg with a negative charge of 15 C is 180 m from a second asteroid of mass 52,000 kg with a negative charge of 11 C. What is the magnitude of the net force the asteroids exert upon each other if we can treat them as point particles? (G = 6.67 x 10^-11 N*m^2/kg^2, k = 8.99 x 10^9 N*m^2/C^2)
A) 0.000040 N
B) 0.0062 N
C) 570,000 N
D) 510,000 N
Three point-like charged objects with charges +4.0 C, -5.0 C, and -9.0 C are placed on the x-axis at the points x = 0 cm, x = 40 cm, and x = 120 cm, respectively. What is the component of the electrostatic force on the -9.0 C object due to the other two objects? (k = 9.0 x 10^9 N*m^2/C^2)
A) -0.5 N
B) 0.5 N
C) 0.64 N
D) 0.41 N
E) -0.41 N
A point-like object of charge +3.00 C and a second point-like object of charge Q are initially very far apart. If it takes 29.0 J of work to bring them to a final configuration in which the +3.00 C object is at the position x = 1.00 mm, y = 0.00 mm, and the object of charge Q is at the position x = 1.00 mm, y = 3.00 mm, find the magnitude of the charge Q. (k = 8.99 x 10^9 N*m^2/C^2)
A) 2.15 C
B) 4.30 C
C) 10.74 C
D) 4.30 C