Physics Waves And Oscillations Level: Misc Level
A plane can fly at Mach 1.38, which means the speed of the plane is 1.38 times the speed of sound in air. What is the angle between the direction of propagation of the shock wave and the direction of the plane,s velocity?
Physics Properties Of Matter Level: Misc Level
Water is pumped through a pipe to a tank at the top of a building. The pressure of the water at ground level is 2.2 x105 Pa and at the tank, the pressure is atmosopheric.If the diameter of the pipe is the same throughout, find the height at which the tank is located. Atmospheric pressure may be assumed as 1.0 x105 Pa and g as m/s2.
a. 24 m
b.16 m
c. 12 m
d. 20 m
Physics Properties Of Matter Level: Misc Level
A log of wood is floating in water with 40% of its volume above the surface of the water.If the volume of the log is 0.4 m3, find the mass of the log.
a. 16 kg
b. 160 kg
c.240 kg
d. 200 kg
Physics Rotational Mechanics Level: Misc Level
A uniform solid sphere of mass 5 kg and radius 30 cm is rotating about an axis through its center at the rate of 180 rev/min. Find the kinetic energy of the sphere. The rotational inertia of a uniform sphere is 2/5 mr2.
a.16 /J
b. 64/j
c.32 /J
d. 24/J
Physics Work,Power & Energy Level: Misc Level
A 300 g baseball traveling at 30 m/s is struck by a bat in the direction from which it came at 40 m/s. Find the impulse of the force on the baseball.
a. 12 N/s
b.4.5 N/s
c.21 N/s
d. 18 N/s
Physics Force & Laws Of Motion Level: Misc Level
A 200 g ball hits a wall perpendicularly with a velocity of 30 m/s and rebounds back perpendicularly with a velocity of 20 m/s.If the collision lasts for 5 ms, find the average force exerted by the ball on the wall.
a. 4000 N
b. 2000 N
c. 6000 N
d. 1000 N
Physics Properties Of Matter Level: Misc Level
The gauge pressure at a depth of 17 m in equal to:
a. 1.7 x 103 Pa
b. 1.7 x105 Pa
c.1.7 x 104 Pa
d. 1.7 x 10 6 Pa
Physics Force & Laws Of Motion Level: Misc Level
A 3 kg bowling ball traveling with a velocity of 3 m/s collides head -on with another bowling ball of the same mass traveling with a velocity of -2 m/s. If the collision is perfectly elastic, the velocities of the bowling balls after the collision is:
a. 5 m/s and 0
b. -2 m/s and 3 m/s
c. 2 m/s and -3 m/s
d.-2 m/s and -3 m/s
Physics Rotational Mechanics Level: Misc Level
The center of mass of three objects is located at (1,0). One object with a mass of 5.0 kg is at(-2,-1) and a second object with a mass of 2.0 kg is at (0,0).Find the coordinates of the third mass of 3.0 kg.
a. (1.7,6.7)
b. (1.3,5.3)
c. (6.7,1.7)
d.(2.0,6.0)
Physics Properties Of Matter Level: Misc Level
A force of 1.0x103 N is applied to a steel rod of length 1 m and a circular cross- section of area 10 cm2. Find the elongation of the rod. Young,s modulus for steel is 2.0 x 1011 Pa.
a. 2.0 x10-6 m
b. 3.0 x10-6m
c. 1.0 x10-6 m
d. 5.0 x 10-6m
Physics Rotational Mechanics Level: Misc Level
If a solid cylinder, a hoop and a solid sphere of the same mass are rolled down simultaneously from the same height on an inclined plane, in which order will the objects reach the bottom of the incline?
a. Cylinder, sphere, hoop
b. Sphere, cylinder, hoop
c. Cylinder, hoop,sphere
d. Hoop,cylinder,sphere
Physics Rotational Mechanics Level: Misc Level
A solid cylinder of mass 8 kg and diameter 20 cm is rotated about an axis parallel to its central axis at a distance of 10 cm from the cylinder. The rotaional inertia of the cylinder about the parallel axis is:
a. 0.08 kg m2
b.0.12 kg m2
c.12 kg m2
d. 0.04 kg m2
Physics Rotational Mechanics Level: Misc Level
A disk with a mass of 50 kg and radius 0.40 m is rotated about its axis by a motor. The flywheel starts from rest and rotates at 120 rev/min in 10 s. Find the torque, assuming it to be a constant.
a. 2.0 N/m
b.5.0 N/m
c. 1.5 N/m
d.3.0 N/m
Physics Rotational Mechanics Level: Misc Level
The crankshaft of an engine is accelerated from rest at the uniform rate of 4.0 rad/s2 for 30 s. Find the rotational speed of the crankshaft at the end of 30 s in rev/min.
a. 190 rev/min
b. 19 rev/min
c. 1150 rev/min
d. 1900 rev/min
Physics Force & Laws Of Motion Level: Misc Level
The magnitude of the momentum of a particle is 32 kg m/s at a certain instant. If the velocity has a magnitude of 20 m/s at that instant, the mass of the particle is:
a. 4..0 kg
b. 0.4
c. 1.3 kg
d.1.6 kg
