Questions from College Physics

Q: A 5.00-g lead bullet traveling at 3.

A 5.00-g lead bullet traveling at 3.00 x 102 m/s is stopped by a large tree. If half the kinetic energy of the bullet is transformed into internal energy and remains with the bullet while the other ha...

Q: Three point charges are aligned along the x - axis as shown

Three point charges are aligned along the x - axis as shown in Figure P15.57. Find the electric field at the position x = 12.0 m, y = 0. Figure P15.57:

Q: A small plastic ball of mass m = 2.00 g

A small plastic ball of mass m = 2.00 g is suspended by a string of length L = 20.0 cm in a uniform electric field, as shown in Figure P15.58. If the ball is in equilibrium when the string makes a &Ic...

Q: A proton moving at v0 = 1.50 x 106 m

A proton moving at v0 = 1.50 x 106 m/s enters the region between two parallel plates with charge densities of magnitude σ = 4.20 x 10-9 C/m2 (Fig. P15.59). Calculate (a) The magnitude of th...

Q: A molecule of DNA (deoxyribonucleic acid) is 2.17

A molecule of DNA (deoxyribonucleic acid) is 2.17 mm long. The ends of the molecule become singly ionized: negative on one end, positive on the other. The helical molecule acts like a spring and compr...

Q: The electrons in a particle beam each have a kinetic energy K

The electrons in a particle beam each have a kinetic energy K. Find the magnitude of the electric field that will stop these electrons in a distance d, expressing the answer symbolically in terms of K...

Q: A point charge +2Q is at the origin and a point

A point charge +2Q is at the origin and a point charge -Q is located along the x - axis at x = d as in Figure P15.61. Find symbolic expressions for the components of the net force on a third point cha...

Q: A 1.00 - g cork ball having a positive charge

A 1.00 - g cork ball having a positive charge of 2.00 mC is suspended vertically on a 0.500 - m - long light string in the presence of a uniform downward - directed electric field of magnitude E = 1.0...

Q: Two 2.0- g spheres are suspended by 10.

Two 2.0- g spheres are suspended by 10.0 - cm - long light strings (Fig. P15.63). A uniform electric field is applied in the x - direction. If the spheres have charges of -5.0 x 10-8 C and +5.0 x 10-8...

Q: A point charge of magnitude 5.00 μC is at the

A point charge of magnitude 5.00 μC is at the origin of a coordinate system, and a charge of -4.00 μC is at the point x = 1.00 m. There is a point on the x - axis, at x less than infinity, where the e...