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A battery of EMF E and internal resistance r is connected across a variable resistor. When the resistor is set at 2lΩ the current through it is 0.48A; when it is set at 36Ω. the current is 0.30A. Find E and r.
Convert the following rectangular coordinates into polar coordinates (r , theta) so that r<0 and 0<theta <2pi: ( 4, -4 square root of 3)
Saline solutions are used in hospitals to replace lost body fluids and electrolytes. A normal saline solution is made by dissolving 0.9 g NaCl in 100 mL of water. Calculate its concentration as % by mass
A die is rolled and then a coin is tossed.
a. Determine how many different outcomes are possible.
b. Construct a tree diagram to list all of the possible outcomes.
If U = {0,1,2,3,4,5,6,7,8,9}, A = {3,6,9} and B = {4,8}, find:
a. A intersection B
b. A union B
c. A complement
d. B complement
e. (A union B)complement
Males having down syndrome has sex chromosomes;
a. XXY
b. XY
c. XYY
d. XYYY
Which of the following enzyme can act as a polymerase as well as exonuclease?
a. RNA polymerase I c. DNA polymerase I
b. RNA polymerase III d. DNA polymerase III
Caffeine is a stimulant found in coffee and has chemical formula C8H10N4O2 . A 100g sample of coffee powder contains 980 mg caffeine. Determine %nitrogen in 42.0 g of coffee powder
What is economics?
An ideal gas absorbs 5.00 × 10^3 J energy while doing 2.00 × 10^3 J of work on the environment during a constant pressure process (a) What is the change in the internal energy of the gas?
(b) If the internal energy now drops by 4.50 × 10^3 J and 2.00 × 10^3 J is expelled from the system, find the change in volume, assuming a constant pressure process at 1.01 × 10^5 Pa.
#340153 on Dec 2023