Answer:
low powered radio frequency (RF) energy
Answer:
dv = 1.03 inch^3
Explanation:
given data:
diameter = 3 inch
radius = 1.5 inch
height 4 inch
top and bottom thickness is 0.02 inch
side thickness = 0.015 inch
we know that volume of the cylinder is given as

by definition of differential we have

where dh = -(0.02 + 0.02) = 0.04 inch [ sum of top and bottom thickness]
the radius is decreased by 0.02 inch, dr = 0.02 inc,


dv = 37.69*(0.02) + 7.06*(0.04)
dv = 1.03 inch^3
Answer:
a)
, b) 
Explanation:
a) According to the Principle of Energy Conservation, the kinetic energy of the box is transformed into elastic potential energy.

The spring constant is:

b) The initial speed needed to compress the spring by 1.5 centimeters is:


Since it is a smooth marble and basing from the graph, it has a constant slope, you could just get any two points along the line and get its slope since speed is Δd/Δt. Let the points be (4,6) and (6,9). Thus,
Δd/Δt = (9-6)/(6-4) = 1.5
Thus, the average speed is 1.5 m/s.