Homework answers and tutorials

Waiting for answer Is there a gland located near the thyroid?
There are four parathyroid glands located on the dorsal side of thyroid gland.
$10.00 
Waiting for answer How will you prove the formula ##cos(AB)=cosAcosB+sinAsinB#...
As below Let us consider two unit vectors in XY plane as follows : ##hata ## inclined with positive direction of Xaxis at angles A ## hat b ## inclined with positive dire...
$10.00 
Waiting for answer Of the 112 students in the marching band, 35 were in the dru...
##5:11## The number of other musicians in the band is: ##112  35 = 77## So the ratio of drummers to other musicians can be written: ##35:77## This can be simplified since bo...
$10.00 
Waiting for answer How does the shielding effect affect atomic radius?
More shielding = larger atomic radius Shielding is when electrons in the inner electron shells of an atom can shield the outer electrons from the pull of the nucleus. The nucleus c...
$10.00 
Waiting for answer Find the mass in grams of one molecule of NO2 ; you must exp...
in oder to find the mass of one molecule of ##NO_2## nitrogen dioxide, which could actually be the polyatomic ion nitrite ##NO_2^1##, we must convert one molecule to moles and than moles to grams. molecules ## ## moles ## ## grams Begin with one molecule and convert it to moles by using Avog...
$10.00 
$10.00

Waiting for answer How can I write the formula for potassium bromide?
You need to know the ions for potassium and bromide. Potassium is in Group 1 of so it loses one electron to become K+ and the Bromine atom is in Group 17 so it gains one electron to become Br. The charges are therefore +1 and 1 and they balance and cancel each other out so the compound Potassium...
$10.00 
Waiting for answer The radius of a circle is 5.5 cm. What is the circumference...
34.55 cm or.345 meters Radius is 5.5 cm. Circumference = pi x diamter ( diameter of a circle is the radius x 2) C=Pi x 11 C=34.55cm/ 100 (because there are 100 cm in meter} C=.345...
$10.00 
Waiting for answer What is the difference between supplementary angles and a li...
Linear pair is a pair of two supplementary angles. But two supplementary angles might or might not form a linear pair, they just have to "supplement" each other, that is their sum should be ##180^o##....
$10.00 
Waiting for answer A marker is 0.13 meters long. What is the length in millimet...
130 millimetes Millimeter is a small part of meter (1/1000m). That means some number of meters is some larger number of millimeters (for length itself to be the same). 0.13m = 0.13*1...
$10.00 
Waiting for answer Why do earthquakes occur along the plate boundaries?
Pressure. The is made up of different plates. These plates move. Some move away from each other, but others push or slide against each other. When plates move away the molten magm...
$10.00 
Waiting for answer What are atomic size trends within transition metals?
Periodic trends play a huge role in chemistry. Regular changes in atomic size and other variables across allow us to make systematic predictions about the behavior of similar . Covalent radius is a convenient measure of atomic size. The figure below shows the covalent radii of metals in groups 41...
$10.00 
Waiting for answer What is chromatin and what are chromosomes?
chromatin/chrmosomes chromatin unwound dna that is wrapped around called histones (imagine as noodles with meatballs) chromosomes tightly wound dna found only during cell division...
$10.00 
Waiting for answer How do kepler's laws of planetary motion relate to newton's...
were obtained from direct observation of planetary motion, but can be derived from Newton's universal law. You might want to look at:http://www.physicsclassroom.com/class/circles/Lesson4/KeplersThreeLaws A quick example is as follows:the universal law is ##F={GMm}/R^2##, where ##M## is th...
$10.00 
Waiting for answer What are the stages of the menstrual cycle in a human female...
The cycle is divided into 4 phases/stages: Menstrual Follicular Ovulation Luteal Here are the 4 phases (in order): MENSTRUAL PHASE The menstrual cycle begins (day 1 is) fr...
$10.00 
Waiting for answer The sixthgraders at Meadowbrook Middle School are going on...
we need ##7## busses to transport ##325## travelers. This is a relatively simple math question if we break it down. The numbers may seem overwhelming, but if we simplify them we see...
$10.00 
Waiting for answer How do you find two consecutive integers whose sum is 73?
If we let the smaller of 2 consecutive integers be ##x## then the larger is ##x+1##. We are told that ##(x) + (x+1) = 73## ##2x+1 = 73## ##2x = 72## ##x=36## and the two consecutive integers are ##36## and ##37##
$10.00 
Waiting for answer How do beats help determine whether two sound waves are of t...
The closer the frequencies of the wave are to each other, the less frequent the beats. When two waves have the same frequency, there will not be any beats. Beats come from between...
$10.00 
Waiting for answer What was FDR's "court packing plan" and why was it such a se...
FDR's court packing plan was a plan to add new justices onto the supreme court for each justice over the age of 70.5 years. It showed the limit of FDR's power over the government. Th...
$10.00 
Waiting for answer What is the lithosphere and why is it important?
The lithosphere is the outermost 'sphere' of the solid Earth, consisting of the crust and the upper part of the mantle. The lithosphere is largely important because it is the area t...
$10.00