If lift is going up with acceleration, the apparent weight of a body is
may be more or less than true weight
equal to the true weight
less than the true weight
more than the true weight
Answer: Option D
Similar Questions :
1. Which law states, "The rate of loss of heat by a body is directly proportional to the difference in temperature between the body and the surroundings."
Doppler's Effect
Newton's law of cooling
Kirchhoff's Law
Stefan's Law
Answer: Option B
Explanation:
Doppler's Effect - The Doppler effect can be described as the effect produced by a moving source of waves in which there is an apparent upward shift in frequency for observers towards whom the source is approaching and an apparent downward shift in frequency for observers from whom the source is receding.
Kirchhoff's Law - Kirchhoff's Law signifies that good absorbers are good emitters.
Stefan's Law - The radiant energy emitted by a black body per unit area per unit time is directly proportional to the fourth power of its absolute temperature.
2. Which instrument is used to record physical happenings at a distant place ?
Thermostat
Tonometer
Telemeter
Transponder
Answer: Option C
Explanation:
Thermostat - is used to regulate the temperature at a particular point.
Tonometer - is used to measure the pitch of a sound,
Transponder - is used to receive a signal and transmit a reply immediately.
3. Alfred Nobel invented
X ray
Diesel Engine
Dynamite
Dynamo
Answer: Option C
Explanation:
Alfred Nobel if Sweden invented Dynamite in 1867,
X ray was invented by Wilhelm Roentgen of Germany in 1895,
Diesel Engine was invented by Rudolf Diesel of Germany 1892,
Dynamo was invented by Michael Faraday of England in 1831.
4. What is unit of Viscosity ?
coulomb
newton second per square meter
watt per meter per degree celcius
joule per kilogram per Kelvin
Answer: Option B
Explanation:
coulomb is unit of Electric Charge,
watt per meter per degree celcius is unit of Thermal Conductivity,
joule per kilogram per Kelvin is unit of Specific Heat capacity.