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Other Physics – Q&A

6 709Questions:

4 634Free Answers by our Experts:

A capacitor of 10 uF and 20 uF are connected across batteries of 600 volts and 1000 volts respectively and then disconnected. They are then joined in parallel. What is the charge on each capacitor.

In Progress...

are stationary waves progressive waves ? explain with proof and logics.

Answered!

Which of the following is not an equation of state of a thermodynamic system?

Charles law
Ideal gas law
Van der Waals equation
Kirchoff's junction rule

Answered!

Which of the following is NOT due to Bernoulli effect

a. raised tarpaulins on moving trucks
b. the curve of a baseball
c. the lift produced on an airplane
d. the floating of an iceberg

Answered!

When the junctions of two dissimilar metals are maintained at different temperatures an electromotive force is is set up in the circuit of which these junctions are part. A pair of juntions of this kind and the effect are known respectively as:

a. thermistor and Peltier effect
b. resistance thermometer and Joule effect
c. pyrometer and Joule effect
d. thermocouple and Seebeck effect

Answered!

The temperature at which the tungsten filament of a 12V and 36W lamp operates is 1730
oC
. If the temperature coefficient of resistance of tungsten is
6×10−3
/K, find the resistance of the lamp at a room temperature of 20oC

10:00Ω

0:45Ω

0:39Ω

4:00Ω

Answered!

Steel ship ships are able to float on water even though steel is denser that water. This explained using the ------------- principle.

a. Archimedes
b. surface tension
c. Newton's
d. Joule's

In Progress...

Which of these determines whether or not heat flows in a system?

a. average speed of the consituent particles of the system
b. pressure difference between parts of the system
c. degree of hotness or coolness of the system
d. temperature difference between parts of the system

In Progress...

Which of the following is NOT true about conduction as a means of heat transfer?

a. transfer of heat occurs through sucessive collisions of the atoms or molecules
b. the average kinetic energy of the atoms or molecules is greater in the hot object than in the cold javascript:void(0)object
c. the transfer process requires a material medium for it to take place
d.there is net translational motion of the atoms or molecules from their mean equilibrium positionsjavascript:void(0)

In Progress...

Detrmine the quantity of heat conducted in thirty minutes through an iron plate 2.0 cm thick and
0:10m2
in area if the temperatures of the two sides are
0o
C and
20o
C. The coefficient of thermal conductivity of iron is 50.4 J/smC

9:1×106J

2:3×106J

4:1×106J

3:3×106J

In Progress...
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