Answer:
Two Dutch spectacle-makers and father-and-son team, Hans and Zacharias Janssen, create the first microscope in 1590.
Explanation:
A microscope is an instrument that makes an enlarged image of a small object, thus revealing details too small to be seen by the unaided eye. The most familiar kind of microscope is the optical microscope, which uses visible light focused through lenses. Eeuwenhoek observed animal and plant tissue, human sperm and blood cells, minerals, fossils, and many other things that had never been seen before on a microscopic scale. He presented his findings to the Royal Society in London, where Robert Hooke was also making remarkable discoveries with a microscope.
In Java programming, the <u>%s</u> format specifier can receive any type of Java data.
<h3>The kinds of data type.</h3>
In Computer programming, there are five recognized data types and these include:
- Floating point type (float).
<h3>What is a string?</h3>
A string is a data type which is typically used for data values that comprises ordered sequences of characters.
In Java programming, strings can be used to represent all Java data types such as numbers, Boolean, strings, etc. Also, the <u>%s</u> format specifier can be used by a programmer or software developer to receive any type of Java data.
Read more on a string here: brainly.com/question/25619349
Answer:
PROGRAM QuadraticEquation
Solver
IMPLICIT NONE
REAL :: a, b, c
;
REA :: d
;
REAL :: root1, root2
;
//read in the coefficients a, b and c
READ(*,*) a, b, c
WRITE(*,*) 'a = ', a
WRITE(*,*) 'b = ', b
WRITE(*,*) 'c = ', c
WRITE(*,*)
// computing the square root of discriminant d
d = b*b - 4.0*a*c
IF (d >= 0.0) THEN //checking if it is solvable?
d = SQRT(d)
root1 = (-b + d)/(2.0*a) // first root
root2 = (-b - d)/(2.0*a) // second root
WRITE(*,*) 'Roots are ', root1, ' and ', root2
ELSE //complex roots
WRITE(*,*) 'There is no real roots!'
WRITE(*,*) 'Discriminant = ', d
END IF
END PROGRAM QuadraticEquationSolver
<span>The first personal computer operating system was named DOS.
DOS stands for disk operating system. A system software that manages hardware and software resources is an operating system and </span>the personal computer is used by one person at a time. The first personal computer was the ENIAC (<span>Electronic Numerical Integrator and Computer</span>) which became operational in 1946.
