Related Questions

The ratio of the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in the same mass of dry air when it is saturated at the same temperature and pressure, is called
A Humidity ratio
B Relative humidity
C Absolute humidity
D Degree of saturation
Rittinger's number designates the new surface created per unit mechanical energy absorbed by the material being crushed. Larger value of Rittinger's number of a material indicates its
A Easier grindability
B Poor grindability
C High power consumption in grinding
D None of these
Heat conducted through per unit area and unit thick face per unit time when temperature difference between opposite faces is unity, is called
A Thermal resistance
B Thermal coefficient
C Temperature gradient
D Thermal conductivity
Which of the following fuels has the highest calorific value per unit mass (kcal/kg)?
A Coal
B Kerosene
C Natural gas
D Furnace oil
The price per unit of a product increases by 25% . The actual Taka increase in the unit price is Tk.1.25. What was the unit price in Taka before the price increase?
A 5
B 7.5
C 6.25
D 8.75
The price per unit of product increased by 25% The actual taka increase in the unit price was Tk. 1.25. What was the unit price in Taka, before the price increase?
A 5.00
B 6.25
C 7.50
D 8.75
The price per unit of product increased by 25% The actual taka increase in the unit price was Tk. 1.25. What was the unit price in Taka , before the price increase?
A 5.00
B 6.25
C 7.50
D 8.75
Based on the information below, how much did a certain telephone call cost? 1. The call lasted 1 minute 27 seconds 2. The cost for the first 30 second unit is Tk. 1.80, call duration more than 30 seconds costs Tk. 0.90 per 30 second unit 3. Any call duration less than 30 seconds is rounded up to the nearest 30-second unit.
A Tk. 1.80
B Tk. 2.61
C Tk. 2.70
D Tk. 3.51
Rittinger number which designates the new surface prduced per unit of mechanical energy absorbed by the material being crushed, depends on the
A State or manner of application of the crushing force
B Ultimate strength of the material
C Elastic constant of the material
D All of the above
একটি স্প্রিং এর সাথে ঝুলানো 121 kg ভরের একটি বস্তুর স্পন্দনের পর্যায়কাল 2 s । যদি ঝুলন্ত ভরের পরিমাণ 2 kg বৃদ্ধি করা হয় তবে স্প্রিংটির পর্যায়কাল 1 s বৃদ্ধি পায়। প্রারম্ভিক ভর 72 এর মান কত? ( An object of mass m kg attached to a spring oscillates with a period of 2 s. If the mass is increased by 2 kg, the period increases by 1 s. What is the initial mass m?)
A 4 kg
B 3 kg
C 1.6 kg
D 2.7 kg

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