Physics Heat & Thermodynamics Level: Misc Level
The coefficient of thermal conductivity has the unit:
a.j/(sk)
b.j/(mk)
c.w/(mk)
d.w/(sk)
Physics Units Level: Misc Level
If x=a +bt +ct2, where x is in meters and t in seconds,the unit of c is:
a. 1/2 m
b. m
c.m/2 s
d.m/s
Physics Measurements Level: Misc Level
The significant in 0.080 kg is:
a. 3
b.4
c.2
d.1
Physics Waves And Oscillations Level: Misc Level
A train is approaching a station and blows its horn with a frequency of 200 Hz. If the train has a speed of 25 m/s and the speed of sound is 350 m/s, what is the frequency of sound heard by the people standing on the platform?
a. 186 Hz
b.190 Hz
c.200 Hz
d.215 Hz
Physics Force & Laws Of Motion Level: Misc Level
A car traveling at 20 m/s is brought to a halt by applying the brakes in 4 s. What is the magnitude of acceleration of the car?
a. 4 m/s2
b.3 m/s2
c.5 m/s2
d.2 m/s2
Physics Work,Power & Energy Level: Misc Level
A simple pendulum with a bob of mass 250 g and length 2.0 m is allowed to fall from a horizontal position. The speed of the bob as it passes the lowest point is: (Assume g=9.8 m//s2)
a. 6.3 m/s
b.39 m/s
c.9.8 m/s
d. 4.9 m/s
Physics Force & Laws Of Motion Level: Misc Level
A cylindrcal specimen of steel of cross- sectional area 5 cm2 is subjected to a tensile force of 800 N. The stress in the material is:
a. 3.2 x 106 N/m2
b.8.0 x103 N/m2
c.4.0 x 103 N/m2
d.1.6 x 106 N/m2
Physics Measurements Level: Misc Level
A temperature of -162% C corresponds to:
a. -111 K
b.162 K
c. -162 K
d.111 K
Physics Wave Optics Level: Misc Level
Completely polarized light is passed through a polarizing sheet. The light that passes through has an intensity of 50% of the incident beam. The angle between the direction of polarization of the incident beam and the direction of polarization of the sheet must be:
a. 30%
b.45%
c.90%
d.60%
Physics Rotational Mechanics Level: Misc Level
Find the kinetic energy of a cylindrcal shaft of mass 2.0 kg and radius 10 cm rotating about its central axis at 600 rad/s.
a. 1800J
b.18000J
c.1200J
d.12000J
Physics Units Level: Misc Level
The unit of work is:
a. kg m2/s2
b. kg m/s
c.kg m2/s
d. kg m/s2
Physics Force & Laws Of Motion Level: Misc Level
A safe with a mass of 150 kg is at rest on the floor. What is the minimum horizontal force needed to move the safe if the coefficient of static friction between the safe and the floor is 0.3?
a. 441 N
b.501 N
c.51 N
d. 41 N
Physics Vectors Level: Misc Level
A person moves 30 m North, then 20 m East, and 30/2 m45% South of west. His displacement from the original position is:
a. 10 m West
b. 15 m East
c. 28 m South
d. 14 m South-West
Physics Properties Of Matter Level: Misc Level
The specific heat of gas at constant pressure is 1.70 times the specific heat at constant volume. Find the specific heat at constant pressure. (Universal gas constant R=8.31 J/(mol K)
a. 20.2 J/ (mol K)
b.12.5 J/(mol K)
c.24.0 J/(mol K)
d. 18.0J(mol K)
Physics Current Electricity Level: Misc Level
If 480 C of charge pass through 4.0 Q resistor in 10 minutes, what is the potential difference across the resistor.
