Related Questions

On a night when the sky is clear, the temperature may dip considerably; on a cloudy night the temperature will usually dip much less. The reason for this difference is that
A the clear sky allows radiant energy to escape readily from the earth
B on a cloudy night the clouds are warm and therefore retard the cooling
C the clear sky allows the cold of outer space to reach the earth
D current of air carry the heat away from the earth on a clear night
Ten new television shows appeared during the month of September. Five of the shows were sitcoms, three were hour-long dramas, and two were news-magazine shows. By January, only seven of these new shows were still on the air. Five of the shows that remained were sitcoms.
A Only one of the news-magazine shows remained on the air.
B Only one of the hour-long dramas remained on the air.
C At least one of the shows that was cancelled was an hour-long drama.
D Television viewers prefer sitcoms over hour-long dramas.
When a system in equilibrium is subjected to a change in temperature, pressure or concentration, the equilibrium is displaced in a direction which tends to undo the effect of the change. This is called the
A Le-Chatelier principle
B Kopp's rule
C Law of corresponding state
D Arrehenius hypothesis
The temperature indicating instrument in vehicles indicates the temperature of
A Engine piston
B Engine cylinder
C Lubricating oil
D Jacket cooling water
This is a line terminated by arrowheads, indicating the direction and extent of a dimension:
A Dimension line
B Extension line
C Arrowhead line
D Centerline
Which of the following permits a microwave signal to travel in one direction with virtually no loss, but severely attenuates any signal attempting to travel in the reverse direction?
A Isolator
B Wave trap
C Tunnel diode
D Circulator
stand next to the lamppost and face west ,walk 20 yards and then turn 90 degrees clockwise. Walk another 10 yards and then turn 45 degrees anticlockwise. Walk another 15 yards, reverse you direction and walk 5 yards back. Turn 135 degrees clockwise and walk another 10 yards . In which direction are you now facing?
A West
B East
C South
D North
The type of valve which allows water to flow in one direction but prevents its flow in the reverse direction is
A Reflux valve
B Sluice valve
C Air relief valve
D Pressure relief valve
If the maximum dip of a parabolic tendon carrying tension P is h and the effective length of the pre-stressed beam is L, the upward uniform pressure will be
A $$\frac{{8{\text{hP}}}}{l}$$
B $$\frac{{8{\text{hP}}}}{{{l^2}}}$$
C $$\frac{{8{\text{h}}l}}{{\text{P}}}$$
D $$\frac{{8{\text{h}}l}}{{{{\text{P}}^2}}}$$
According to Fleming's right-hand rule for finding the direction of induced e.m.f., when middle finger points in the direction of induced e.m.f., forefinger will point in the direction of
A Motion of conductor
B Lines of force
C Either of the above
D None of the above

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