Specific heat capacity= m c Δ t
= 20 * 0.11* (75-25)
= 20* 0.11* 50
= 110 calories.
Answer:
Due to the chemical versatility of carbon atoms
Explanation:
Carbon is a very important element and it is commonly found in many varieties of chemical compounds. They are also found to be present in space in various amount. It is often considered to be versatile because they are capable of forming single, double, as well as triple bonds. This enables them to make single and branched chains. They also form ring chains when combined with other atoms of carbon.
It is because of this versatility of carbon atoms, there forms complex variety of organic molecules.
Answer:
Capacitance = ( 4π×∈×r×R ) / (R-r)
energy store = ( 4π×∈×r×R )×V² / (R-r)
Explanation:
given data
radius = r
radius = R
r < R
to find out
capacitance and how much energy store
solution
we consider here r is inner radius and R is outer radius
so now apply capacitance C formula that is
C = Q/V .................1
here Q is charge and V is voltage
we know capacitance have equal and opposite charge so
V =
here E = Q / 4π∈k²
so
V = Q / 4π∈
V = Q / 4π∈ × ( 1/r - 1/R )
V = Q(R-r) / ( 4π×∈×r×R )
so from equation 1
C = Q/V
Capacitance = ( 4π×∈×r×R ) / (R-r)
and
energy store is 1/2×C×V²
energy store = ( 4π×∈×r×R )×V² / (R-r)
First of all, the question is vague as you haven't mentioned the medium of propagation of the wave, which is extremely crucial.
For example light travels at <span>299,792</span> km/second in vacuum, but in certain semiconductors, it travels as slow as 9 km/second. Sound, ocean and seismic waves don't exist in vacuum at all.
If you mean the maximum possible speed any of these options can attain in any medium of choice for the different options, then the answer would be
b. radio waves, which travel exactly at the speed of light in vacuum (299,792 km/second) and with an almost similar(slightly less) speed in air. (Radio waves are nothing but electromagnetic waves with low frequency)