Question
A calorimeter is typically made from a thin sheet of which
metal, known for its high thermal conductivity?Solution
Calorimeters are designed to measure heat changes during physical or chemical processes. To do this effectively, the container must allow rapid heat exchange. Copper is commonly used because of its excellent thermal conductivity and low specific heat capacity, making it ideal for precise thermal measurements.
A man rows to a place 48 km distant and comes back in 14 hours. He finds that he can row 4 km with the stream at the same time as 3 km against the strea...
Speed of a boat in still water is three times the speed of the boat in upstream. If the boat takes 46 minutes to cover 23 km in downstream, then find th...
Ratio of speed of boat in downstream and speed of stream is 7:4, if speed of current is 8 km/hr, then find distance travelled (in km) upstream in 7 hours.
A boat covers a total downstream distance of 180 km, split into two equal parts. The boat’s speeds in these two parts are 2a km/h and 4a km/h respecti...
The speed of a boat in still water is 8 km/hr and speed of current is 4 km/hr. If time taken to cover a certain distance upstream is 12 hours, then how ...
- A boat covers (x – 20) km upstream in the same time it covers (2x – 95) km downstream. If the speed of the boat and stream are 15 km/h and 3 km/h respe...
- The current age ratio of Aman and Arjun is 3:4, respectively. After 6 years, their ages will be in the ratio 4:5. What is Aman’s present age?
The speed of a boat is that of the current of water is 30:7. The boat goes along with the current in 4 hours 12 minutes. It will come back in
The speed of boat downstream and upstream is 30 km/hr and 20 km/hr respectively. Time taken to travel a distance of (a + 50) km downstream and (b + 25) ...
Speed of a boat in still water is 12 kmph and speed of stream is 9 kmph. A man rows to a place at a distance of 63 km and come back to starting point. T...