A 12-g bullet moving horizontally strikes and remains in a 3.0-kg block initially at rest on the edge of a table. The block, which is initially 80 cm above the floor, strikes the floor a horizontal distance of 120 cm from its initial position. What was the initial speed of the bullet?
a. 0.68 km/s
b. 0.75 km/s
c. 0.81 km/s
d. 0.87 km/s
e. 0.41 km/s
[Ques. 2] The strongest force between the protons and
neutrons in the nucleus of an atom is the
a) gravitational force.
b) electromagnetic force.
c) nuclear force
d) centripetal force.
[Ques. 3] A 2.0-kg object moving with a velocity of 5.0 m/s in the positive x direction strikes and sticks to a 3.0-kg object moving with a speed of 2.0 m/s in the same direction. How much kinetic energy is lost in this collision?
a. 2.4 J
b. 9.6 J
c. 5.4 J
d. 0.6 J
e. 6.0 J
[Ques. 4] A packet, or quantum of light or any other type of electromagnetic radiation is called
a) an energy level.
b) a photon.
c) an excited state.
d) a discrete bundle.
[Ques. 5] A 4.0-kg particle is moving horizontally with a speed of 5.0 m/s when it strikes a vertical wall. The particle rebounds with a speed of 3.0 m/s. What is the magnitude of the impulse delivered to the particle?
a. 24 N/s
b. 32 N/s
c. 40 N/s
d. 30 N/s
e. 8.0 N/s
[Ques. 6] The probability that a hydrogen atom's electron
will be at a certain distance from the proton is
given by
a) the principal quantum number of the electron.
b) the electron's de Broglie wavelength.
c) the binding energy of the electron.
d) the square of the electron's Schrdinger wave function.
[Ques. 7] A 1.6-kg ball is attached to the end of a 0.40-m string to form a pendulum. This pendulum is released from rest with the string horizontal. At the lowest point of its swing, when it is moving horizontally, the ball collides with a 0.80-kg block initially at rest on a horizontal frictionless surface. The speed of the block just after the collision is 3.0 m/s. What is the speed of the ball just after the collision?
a. 1.7 m/s
b. 1.1 m/s
c. 1.5 m/s
d. 1.3 m/s
e. 2.1 m/s
[Ques. 8] When all the colors of the rainbow can be seen in
a spectrum and no individual bright or dark lines
are visible, the spectrum is called
a)an emission spectrum.
b)a continuous spectrum.
c)a chromatic spectrum.
d)an absorption spectrum.
[Ques. 9] An 8.0-kg object moving 4.0 m/s in the positive x direction has a one-dimensional collision with a 2.0-kg object moving 3.0 m/s in the opposite direction. The final velocity of the 8.0-kg object is 2.0 m/s in the positive x direction. What is the total kinetic energy of the two-mass system after the collision?
a. 32 J
b. 52 J
c. 41 J
d. 25 J
e. 29 J
[Ques. 10] The theory of matter waves was first developed by
a) Heisenberg
b) Einstein
c) Schrdinger
d) de Broglie
Quick Reply
