Answer:
<h3>Speed is the change in distance over time; velocity is speed plus direction</h3>
Explanation:
Speed is defined as the change in distance covered by a body with respect to time while velocity the change in displacement of a body with respect to time. Speed is a scalar quantity since it does not specifies direction while velocity is a vector quantity because it specifies both magnitude and direction.
Speed can only be equal to the velocity if it also specifies direction.
Based on the definition above, it can be concluded that speed is the change in distance over time and velocity is speed plus direction.
The formula of electric flux is:
electric flux = electric field * surface area
The surface area of a sphere is given by: 4*pi*r^2
Therefore: 4 * 3.14 * 12^2 is equal to 1808.64 cm^2, convert are to m^2
1808.64 cm^2 * (1 m/ 100 cm)^2 = 0.1808 m^2
The point charge is +5<span>μC, convert this to electric field with units of V/m
then solve for the electric flux by multiplying the electric field with the surface area. </span><span /><span>
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Answer:
The rate of transfer of heat is 0.119 W
Solution:
As per the question:
Diameter of the fin, D = 0.5 cm = 0.005 m
Length of the fin, l =30 cm = 0.3 m
Base temperature,
Air temperature,
k = 388 W/mK
h =
Now,
Perimeter of the fin, p =
Cross-sectional area of the fin, A =
A =
To calculate the heat transfer rate:
where
Now,
Answer:
67.5
Explanation:
The plane accelerates at 2.7m/s,^2
Time is 25 seconds
The velocity can be calculated as follows
= 25×2.7
= 67.5
Hence the speed f the plane is 67.5
Answer:
absorb more heat and get heated quickly
Explanation: