Amicrowave oven operates at 2.10 ghz . what is the wavelength of the radiation produced by this appliance?

∆ = 0.143 m

Explanation:

Using the information given above

Let f = frequency= 2.1 ×10^9 hz

Let c be the Speed of light = 3×10^8 m/s

Let ∆ be Wavelength which is unknown

∆ = c/f

= 3× 10^8/2.1 × 10^9

= 0.143 m

answer: 2×10^-2kg

explanation: density= mass per volume

vol=mass/density

converting to s.i units we have;

3÷1000kg = 0.003

1.5÷100m = 0.15

0.003/0.15 = 0.02kg

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2