Answer:
a. Electric field lines can never cross each other.
d. Wider spacing between electric field lines indicates a lower magnitude of electric field.
Explanation:
a. The electric field lines cannot be crossed, since this would mean that there would be more than one electric field vector for the same point at the place where the crossing occurs.
d. The space between the field lines is inversely proportional to the intensity of the electric field.
Answer:
I would recommend placing something on the ground or on the walls of your gym to damped the echos.
Explanation:
Answer:
887 J
Explanation:
the specific heat of a material is defined as the amount of heat energy required to raise the temperature of the substance by 1 K of mass 1 kg. So, the specific heat of the aluminium, c = 887 J/kg K
mass of aluminium, m = 100 g = 0.1 kg
T1 = - 9° C
T2 = 1° C
ΔT = 1 + 9 = 10° C
The amount of heat required
H = m x c x ΔT
H = 0.1 x 887 x 10 = 887 J
F = 1/T = 20,000 so T = 1/20,000
<span>distance = speed * time </span>
<span>L = 343 T </span>
<span>L = 343/20,000 </span>
<span>L =. 01715 meters or about 1.7 centimeters</span>
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