Questions LLC
Login
or
Sign Up
Ask a New Question
christ
Questions and answers by
christ
Questions (19)
Calculate the change in internal energy of 2kg of water at 90 degree Celsius when it is changed to
3.30m3 of steam at 100oC . The
4 answers
444 views
At what temperature will the root-mean-square speed of oxygen molecules have the value of 640 m/s? 1 kilomole of oxygen has a
4 answers
924 views
An engine absorbs 2000J of heat from a hot reservoir and expels 750J to a cold reservoir during each operating cycle. What is
2 answers
574 views
A string of natural length L extends to a new length L' under tensile force F. If Hooke’S law applies, the work done in
1 answer
447 views
If a force of 80N extends a spring of natural length 8m by 0.4m what will be the length of the spring when the applied force is
2 answers
490 views
An electric kettle contains 1.5 kg of water at
100o C and powered by a 2.0 kW electric element. If the thermostat of the kettle
4 answers
2,257 views
Tinny insects such as mosquitoes can seat on the surface of water. Which physical principle makes this possible?
4 answers
381 views
Calculate the electric power which must be supplied to the filament of of a light bulb operating at 3000K. The total surface
3 answers
1,018 views
A 0.5kg piece of metal (c = 600/kgK) at 300 degree celcius is dumped into a large pool of water at 20 degrees celcius. Assuming
3 answers
535 views
Calculate the average translational kinetic energy of a nitrogen molecule at 27 degree celcius
2 answers
943 views
A piece of plastic barely floats in water. If it has a mass of 20g, what is its volume?
2 answers
626 views
1 An object is thrown upward from the edge of a tall building with a velocity of 10 m/s. Where will the object be 3 s after it
7 answers
2,846 views
A passenger in a moving car and a passerby standing at the road side see each other as moving in the opposite direction. Which
2 answers
525 views
1 What is the gravitational field strength at a height h above the surface of the Earth? R is the radius of the earth
gR2(R+h)2
7 answers
1,094 views
1 Physical quantities such as length, mass, time and temperature are referred to as
vector quantities fundamental quantities
5 answers
876 views
Which option describes a neutral connotation?
1 answer
182 views
Where was the ancient region of Mesopotamia located?
1 answer
164 views
Determine if the italicized word in each sentence has a positive, neutral, or negative connotation.(2 points)
Positive Neutral
3 answers
239 views
which of the following statement is not true
1 answer
60 views
