Electrons are accelerated through a difference of potential of V= 10 kV.
(a) What kinetic energy, EK , do the electrons have as they strike the metal plate?
(b) What is the minimum wavelength, X-ray that is emitted

Here

Explanation:

The cutoff frequency depends on the wavelength of the part of the EM wave which is used in illuminating the metal.

True

False

what best describes physical development during adolescence is the development of secondary sex characteristics happens at a rate unique to each individual.

answer: at 24 february, 2014 the population gets twice of its initial population.

explanation:

since we have given that

the population for alpha city, t years after january 1, 2004 is given as

first we find out the initial population, i.e. t=0,

so, our quadratic equation becomes,

according to question, we have said that if the population has twice its initial population, then it becomes

so, time taken to reach this above mentioned population is given by

now, we know that time can't be negative so, we take t=9.149 years.

hence, at 24 february, 2014 the population gets twice of its initial population.