Physics 30-1

A 0.080 kg tennis ball traveling east at 15 m/s is truck by a tennis racquet, giving the ball a velocity of of  25 m/s, west.  What are the magnitude and direction of the impulse given to the ball?

• 0.80 N s east
• 0.80 N s west
• 3.2 N s east
• 3.2 N s west

The area under the curve represents teh

• work done on the object
• impulse experienced by the object
• displacement of the object while the force is being applied
• acceleration of the object as a result of the net force being applied

Two equally charged particles repel each other with a force  F.  If their separation is doubled, they will repel each other with a force

• F/4
• F/2
• 2F
• 4F

In a Millikan-like oil-drop experiment, a charged oil drop is suspended in the region between two horizontal parallel plates that are  2.00 cm  apart.  The electric field between the plates is  1.76 ´ 10⁴ N/C,  toward the top plate.  The mass of the oil drop is  8.61 ´ 10^-16 kg. What is the charge on the oil droplet? 

• 1.6 E-19 C
• 3.2 E-19 C
• 4.8 E-19 C
• 6.4 E-19 C

In what direction will the positive ion experience a magnetic force due to the magnetic field around the wire conductor?

• into the page
• out of the page
• towards the conductor
• away from the conductor

Light that has a wavelength of  4.00 ´ 10^-7 m in air is incident on a glass block that has an index of refraction of 1.50. What is the angle of refraction?

• 19 degrees
• 35 degrees
• 49 degrees
• 55 degrees

A diverging lens has a focal distance of 10.0 cm.  If an object is place 15.0 cm from the lens, the image produced will be

• real and erect
• real and inverted
• virtual and erect
• virtual and inverted

Copper has a work function of 4.46 eV. What is the maximum kinetic energy of the ejected electrons if the metal is illuminated by light with a wavelength of 450 nm?

• 2.72 E-19 J
• 4.42 E-19 J
• 7.14 E-19 J
• 0J because no electrons are emitted

If an electron is in the –1.6 eV energy level, the minimum frequency of a photon that would ionize the atom is

• 3.9E14 Hz
• 2.1E15 Hz
• 2.4E33 Hz
• 1.3E34 Hz

In both decays I and II the type of emitted particle is

• an alpha particle
• a beta negative particle
• a beta positive particle
• a proton