Which of the following is not an appropriate unit for power?
a. horsepower
b. watt
c. joule/sec
d. newton/sec

The correct answer is Option D.

Explanation:

Power is defined as the amount of work done in a unit time.

Mathematically,

S.I. Unit for power is Watt and other units that are used to measure power are horsepower, ergs/sec, Joules/ sec and many more.

Power is also defined as the product of force and velocity. Mathematically,

The units for this equation or power will be N.m/s (Newtons. meter per second)

Hence, the correct answer is Option D.

the answer would be c

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.