Answer:
Explanation:
Intensity, Io = 14.5 W/m²
θ = 25°
By the law of Malus
I = 11.91 W/m²
Now the formula for the rms value of magnetic field is given by
Brms = 2.23 x 10^-7 tesla
Answer:
The answer to your question is below.
Explanation:
Question 10.
Halogens are a group in the periodic table (VIIA), these elements have seven electrons in their outermost shell. Examples of halogens are Chlorine, Fluorine, and Bromine.
The correct answer is the first one.
Question 2.
The answer is false, in a neutral atom, the number of protons and electrons are equal but the number of neutrons is different.
Question 3
Nine is the atomic number of fluorine
Question 4
Group is correct
Question 5
True, elements with similar electron configurations are in the same group, so they have similar chemical and physical properties.
Question 6
Alkali metals and have one valence electrons.
Question 7
True
Question 8
8, elements with 8 electrons in their outermost shell are stable.
Question 9
6, due to oxygen has 6 valence electrons it is in group VIA.
Answer:
See the answers below.
Explanation:
A transformer is a static electrical machine, it should be borne in mind that although the voltage can be increased or decreased, the power must always be equal.
For this case:
The power in the first coil can be calculated by means of the following formula.
where:
V = voltage = 12 [V]
I = current =2 [A]
a)
Therefore the power:
b)
Now in the second coil, the power must be the same:
Answer:
v = 349.23 m/s
Explanation:
It is required to find the orbital speed for a satellite from the center of mass.
Mass of Mars,
The orbital speed for a satellite is given by the formula as follows :
So, the orbital speed for a satellite is 349.23 m/s.
Answer:
net outward force on a passenger's eardrum is 0.6115 N
Explanation:
Change in pressure is calculated as follows
h= height of liquid column =480 m
ρ= density of liquid= 1.3 kg/m^3
putting values we get
ΔP= 6115 Pa
Area of the eardrum is approximately
= 1 cm^2
Therefore, net force F = AΔP
=
= 0.6115 N