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1. An 760 g aluminum block cools from 95˚C to 50.˚C. Given that the specific heat capacity of aluminum is 0.900 J/g.˚C, calculate the heat released.
(thermochemistry)
One-meter-long coaxial cable is incorrectly connected to the output device, so part of the signal bounces back on the connection. Determines the speed of the signal along the wire if we see echoes in the signal with a delay of 10 ns.
1. The specific heat capacity of zinc is 0.388 J/g.˚C. Calculate the initial temperature of zinc block of mass 38g if the amount of heat supplied to it was 220 J and the maximum temperature reached by the zinc block was 55˚C.
The salary distribution ('000) of 1000 employees at a certain company is as follows:
Salary (years) frequency
25-39 20
40-49 32
50-59 30
60-64 10
65-69 8
a, Construct the bar-chart of the data
b, Construct the histogram of the data.
The volume of 2.4 m3 of an ideal gas initially at 0C and pressure 1.013 x 105 Pa is compressed to 1.6 m3 and its temperature remains the same. Calculate the new pressure
what is the volume of 6.9 mol oxygen gas at 233 K and a pressure of 4.0 atm?
Critically explain the Harris-Todaro model of economic growth
Find the potential drop along a copper wire 500 m long and 2 mm in diameter if the current in it is equal to 2 A. Determine the potential drop in resistors. ρ(copper)=1.68×10−8 (Ω·m)Energy of charged capacitor.
The placement session has begun in a college. There is N number of students standing outside an interview room in a line. It is given that the person who goes first has higher chances of selection.
Each student has a number associated with them representing their problem-solving capability. The higher the capability the higher the chances of selection. Now every student wants to know the number of students ahead of him with higher problem-solving capability.
Find, approximately, the amount of metal in a closed tin can 3 inches in diameter and 5 inches
high, if the metal is 1/32 inches thick.
