Answer:
D
Explanation:
The wavelength of A falls in the range of 700 nanometers to 1 millimeter. It is Infra red
The wavelength of B falls in the range of 450 nanometers to 740 nanometers. It is visible light
The wavelength of C falls in the range of 10 nanometers to 400 nanometers. It is Ultraviolet.
The wavelength of D falls in the 0.01 nanometers to 10 nanometers. It is x ray.
Answer: a) 12 Ω; b) 15.10 m; c) 360 kJ
Explanation: In order to explain this problem we have to considere the OHM law which is given by:
V=R*I where R is the resistance and I the current, V is the voltage.
For the toaster heating the resistance must be equal
R=V/I=120/10= 12 Ω
We also know that R=ρ*L/A where L and A are the length and area of the wire.
Then the length of the wire is given by:
L=R*A/ρ= 12*π*(0.8*10^-3)^2/1.6*10^-6=15.10 m
Finally we can calculate the consumed energy by the toaster heating during 5 minutes (5*60s=300 s).
The power is equal:
P=I*V= 10*120=1200 W
E= P*time (s)= 1200*300=360*10^3J
Answer:
The quantities which do not depend on other quantities is called fundamental qiantity. For eg; time,current,lwngth etc...
Answer:
Explanation:
A divergent boundary occurs when two tectonic plates move away from each other. Along these boundaries, earthquakes are common and magma (molten rock) rises from the Earth's mantle to the surface, solidifying to create new oceanic crust.
Mass always stays the same therefore it can’t be c and d. Volume stays the same because she is not removing anything. Therefore it is a
