Answer:
Difference in temperature
Contact between the bodies
Good conductors of electricity have larger conductivity values than insulators.
A material that obeys Ohm's law reasonably well is called an ohmic conductor or a linear conductor.
The resistance of a conductor is proportional to the conductivity of the material of which the conductor is composed.
Answer: Options 1, 2 and 4.
<u>Explanation:</u>
In physics and electrical engineering, a conductor is an article or kind of material that permits the progression of charge in at least one headings. Materials made of metal are basic electrical conduits.
Metals such as copper typify conductors, while most non-metallic solids are said to be good insulators, having extremely high resistance to the flow of charge through them. Most atoms hold on to their electrons tightly and are insulators.
Answer: initial velocity of bullet = 50.72m/s
Explanation:
Detailed explanation and calculation is shown in the image below.
NB: the wooden block has an initial velocity u = 0 since it was at rest.
Answer:
About the universe, The problem isn't just that the sky has billions of stars to search but there are also billions of frequencies.
Answer:
Horizontal component of the initial velocity=v ×cos20°
horizontal displacement= 35m
time taken. (t)=35÷(v×cos20°)
vertical component of the initial velocity= v×sin20°
vertical displacement= -5m(since it is opposite to the direction of the initial velocity. )
application of s=ut+1/2at×t. vertically,
-5=vsin20°×t -1/2 gt×t
-5= vsin20×35/vcos20-1/2×10×35×35/(vcos20×vcos20)
simplify further to obtain v and hence find the time taken
