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Suggest which particles will be emitted as K-40 decays to Ca-39:

As the proton number increases by 1 from 19(K) to 20(Ca), the process of decay must be beta minus in order to conserve charge. This means that an electron (or beta plus particle) will be emitted along with a...
LA
Answered by Luke A. • Physics tutor
2226 Views

a solar cell of area 2m^2 has maximum a power output per unit area of 20W/m^2 . if four solar cells are used together at once, how much energy is release in 2 mins at max power output?

max output of 1 cell = 20x2= 40w , so four cells gives 4x40 = 160w so if it gives 160 joules a second then in 2 mins it will put out 160 x (2x60) = 19200 joules
MB
Answered by Merlin B. • Physics tutor
2177 Views

An electron is emitted from a cathode in an electron gun, with a potential difference of 150kV. Find the velocity of the electron after it is accelerated and find the De Broglie wavelength.

V=J/C1.602×10^-19 ×150×10^3=1/2×m×v^2 v=(2×1.602×10^-19×150×10^3/9.11×10^-31)^1/2v=2.29×10^8 m/sλ=h/pλ=6.63×10^-34/2.29×10^8 × 9.11×10^-31λ=3.17×10^-12
AC
Answered by Adam C. • Physics tutor
2160 Views

State Newton's Law of Gravitation

The gravitational force between two masses is directly proportional to the product of the two masses and inversely proportional to the square of the distance between them.
EB
Answered by Ellis B. • Physics tutor
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what is a standing wave and how is it formed ?

A standing wave is the interference of two sinusoidal waves travelling in opposite directions, confining the wave and its energy to a fixed position, creating nodes and anti nodes . nodes - points where the ...
DN
Answered by Danielle N. • Physics tutor
2145 Views