# Posts by jun

Total # Posts: 39

physic
y(x,t) = (6.50 mm)sin2pi((t/0.0360 s)-(x/0.280m)) Determine the wave's (a) amplitude (b) wavelength (c) frequency (d) speed of propagation and (e) direction of propagation

math
ABC is an isosceles triangle. AB=BC=6. Angle ABC=120,AC=a square root of b. What is a+b?

Math
The difference of two number is seven. when the larger number is decreased by five, then doubled, it is five more than the small number. Find the numbers.

math
An 8 liter can filled with cooking oil weights 42kg. When 5 liters are emptied from the can,the can and the oil weight 27kg.What is the weight of the empty can?

Math
There are a total of 103 foreign language students in a high school where they offer Spanish, French, and German. There are 29 students who take at least 2 languages at once. If there are 40 Spanish students, 42 French students, and 46 German students, how many students take ...

Calculus

Chemistry
2.10*10^3

math
solve √ ̅m+3 + √ ̅m-2 =5 (show step by step process of solving the equation)

math
the measure of the sides of a rectangle are ( 4 √ ̅2 - √ ̅3cm) by ( √ ̅6 + 2 cm). Find the measure of its diagonal.

MATH
√ ̅m+3 + √ ̅m-2 =5 How do you call equation like that?

math
if the square root of twice a number is diminished by three, the result is 5. what is the number?

MATH

math
WHAT PROPERTY OF REAL NUMBERS IS USED IN THE PROCESS OF ADDING AND SUBTRACTING RADICAL EXPRESSIONS?

math
Let r be a rational number. Is (ab)^r = a^r b^r for any real numbers a and b?

chemistry
A weather balloon is filled with 0.295 m3 of helium on the ground at 18 °C and 756 torr. What will the volume of the balloon be at an altitude of 10 km where the temperature is 48 °C and the pressure is 0.14 atm?

physics
The resistance of a coil copper wire at 20 degree celsius is 2.21 ohms. After a current of 10 amperes has been flowing in wire for two hours, the resistance of the coil was found o be 2.59 ohms. What is the temperature rise?

math
how many people casn equally share 2 1/2 pizzas?if each will get 1/4 pizza?

Math
Two circles C1 and C2 touch externally at A. The tangent to C1 drawn at a point B on the circumference of C1 meets C2 in P and Q so that P is between B and Q. QA is produced and meets C1 at X. Prove that angle XAB = angle PAB.

Math
let AB and CD be perpendicular diameters of a circle. two chords AE and AF, which lie in the two different semicircles determined by the diameter AB are cut by the diameter CD in the points X and Y respectively. prove that angle EXF = angle EYF

Math
2 circles C1 and C2 meet at the points A and B. Points C and Dare points on the circumferences of C1 and C2 respectively such that angle CAB = angle DAB. CD cuts C1 and C2 at the points Y and X respectively. if Z is the foot of the perpendicular from X to BY, prove that angle ...

Math
in a quadrilateral ABCD, BC is parallel to AD. AB = BC, 13CD = 20BC and 34AB = 13AD. H is a point on AD such that CH is perpendicular to AD. Prove that 5CH = 3CD

physics
I got... Torque (by radiation) = F dot R = A*P dot R = A*P cos(theta) R P = 0.5 * (electric constant) * E^2 Torque (by gravity) = -mg sin(theta) Torque (by radiation) + Torque (by gravity) = 0 Then i solved for E. Which gives me a wrong answer. I don't know why.

MATH gr10
9(n+3)=7n-3

math
a 30 b 20 c 40

physics
a 65 kg object is pulled at a constant velocity up an incline w/ a force of 95 N parallel to the incline. Assuming that the difference between the work output and input is work required to overcome friction, what is the force of friction along the incline (the length of the ...

Chemistry
because CH4 and 4F_2 ratio is 1:4

physics
1. 8000 m/s^2 east

Geometry
list the sides in order from shortest to longest in angle ABC,with A=80 ,Q =3x+5 , and C =5x-1

Geometry
list the sides in order from shortest to longest in angle PQR,with P=45,Q=10x+30,and R=5x

Geometry
A study draws triangle with a perimeter 36cm.the study says that the longest side measures 18cm. how do you know that the student is incorrect?

math
With regards to question J: The variables x and y are connected by the equation y = x2 - x - 5. Some corresponding values of x and y are given in the table below. x -4 -3 -2 -1 0 1 2 3 4 5 y 15 7 a -3 -5 b -3 1 7 15 (a) Calculate the values of a and b (b) Use 2 cm to represent...

Internatinal Relations
Five of the most serious international problems facing the world today are: 1) the proliferation of WMD 2) international terrorism 3) economic development in impoverished countries 4) international financial stability 5) climate change In which of these five areas do you ...

Internatinal Relations
So I was thinking either 1 or 5 for most progress. 1 because it is a problem that has a very real feel of life and death. Increased in WMD increases likelihood of nuclear warfare. Esp with Iran and N. Korea taking up the headlines of today. But then, this issue has been around...

Internatinal Relations
Five of the most serious international problems facing the world today are: 1) the proliferation of WMD 2) international terrorism 3) economic development in impoverished countries 4) international financial stability 5) climate change In which of these five areas do you ...

science
Gallium has an atomic mass of 69.7 amu. In a typical sample, 60.4% of Ga exxists as a Ga-69 (68.9257 amu). What isa the identity and the atomic mass of the other isotope?

College Physics
y(x,t) = (6.50 mm)sin2pi((t/0.0360 s)-(x/0.280m)) Determine the wave's (a) amplitude (b) wavelength (c) frequency (d) speed of propagation and (e) direction of propagation

Economics
8.a