Answer:
CaCl2 is a reactant
Explanation:
Calcium carbonate (CaCO3) is a reagent, it is found on the left side, what is found on the right side are the products.
The answer 1 is
The best-known use of radio waves is for communication; television, cellphones and radios all receive radio waves and convert them to mechanical vibrations in the speaker to create sound waves that can be heard.Electromagnetic radiation is transmitted inwaves or particles at different wavelengths and frequencies.
the answer 2 is
Radio Waves: Instant Communication
Microwaves: Data and Heat
i think the answer number 3 is
It is all about wavelength versus tunnel diameter. The wavelength of GPS is about 20cm it would happily propagate in any normal tunnel if it could get in but the earth and other structures absorb it. AM radio (600kHz - 1500kHz) cannot propagate in any normal tunnel because the wavelength is too long (500m-200m) relative to the diameter, and thus gets reflected at the entrance. FM (100MHz ~ 3m) would propagate and it does for a while but then it suffers reflections
Heaver objects because they have greater mass
Answer:
The drift velocity of the electrons in this case is c) 5.52 x 10-4 m/s
Explanation:
Hi
First of all, we need to find the volume occupied by 63.3g of copper, so
, then if we assume each atom of copper contributes with one free electron to the material body
.
Finally, we apply
, where A is area so,
, thus
.
As we can see c. 5.52 x 10-4 m/s is the nearest one.
Answer:
i don't know how to explain it but I think it's just the way you do it by yourself