Answer:
Boron
Explanation:
(a)
H means hydrogen
The atomic mass of hydrogen is 1 and the mass number is 2.
Be means beryllium
The atomic number is 4 and the mass number is 9.
n mean neutron, atomic number is 0 and mass number 1.
By conserving the charge,
the atomic number of X = 1 + 4 - 0 = 5
the mass of X = 2 + 9 - 1 = 10
The element having atomic number 5 and mass number 10 is Boron (B).
Answer:
c
Explanation:
Green house effect:
Temperature of atmosphere is going to increased continuously, because infrared light absorbed by gas .This increased in temperature atmosphere is called green house effect.
The green houses gases are as follows
,Carbon diaoxide,water vapor ,,Carbon diaoxide ,Methane ,,Carbon diaoxide oxide,CFCs ,ozone.
So the option c is correct.
Answer:
Most adverse health effects of radiation exposure may be grouped in two general categories:
deterministic effects (harmful tissue reactions) due in large part to the killing/ malfunction of cells following high doses; and
stochastic effects, i.e., cancer and heritable effects involving either cancer development in exposed individuals owing to mutation of somatic cells or heritable disease in their offspring owing to mutation of reproductive (germ)
I would say that work is being done in all the situations because technically in physics work is done whenever force is applied through a distance.
