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Questions (19)
which of the following statement is not true
1 answer
87 views
Determine if the italicized word in each sentence has a positive, neutral, or negative connotation.(2 points)
Positive Neutral
0 answers
299 views
Where was the ancient region of Mesopotamia located?
0 answers
216 views
Which option describes a neutral connotation?
1 answer
237 views
1 Physical quantities such as length, mass, time and temperature are referred to as
vector quantities fundamental quantities
4 answers
988 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
1,191 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
0 answers
598 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
6 answers
2,980 views
A piece of plastic barely floats in water. If it has a mass of 20g, what is its volume?
1 answer
697 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
2 answers
1,032 views
Calculate the average translational kinetic energy of a nitrogen molecule at 27 degree celcius
1 answer
1,028 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
2 answers
617 views
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
3 answers
540 views
Calculate the electric power which must be supplied to the filament of of a light bulb operating at 3000K. The total surface
1 answer
1,114 views
Tinny insects such as mosquitoes can seat on the surface of water. Which physical principle makes this possible?
3 answers
434 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
2 answers
2,354 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
1 answer
565 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
507 views
An engine absorbs 2000J of heat from a hot reservoir and expels 750J to a cold reservoir during each operating cycle. What is
1 answer
664 views
