12/11/16

solve the following system of equations using the substitution method
-3y+x=7 5x+6y=14
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12/11/16

Word problem
Joan had 2.5 times as many books as I do.  You could also say she has 27 more books than I do.  How many do I have.  Please help show the work.  Thank you
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12/11/16

number of molecules in 0.2 mole ammonia gas
Determine the number of molecules that can be found in 0.2 mole ammonia gas
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12/10/16

Physics Question
Demonstrate with Coulomb’s Law what happens to the magnitude of the force between two charges Q1 and Q2 separated by a distance R if:a) one of the charges is doubled?b) both of the charges are... more
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12/10/16

Calculus word problem question
A particle moves along the x-axis with an acceleration according to the formula a(t)=cos(t)-sin(2t), where t is measured in seconds and displacement is measured in meters. If at time t=0 the... more
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12/10/16

Eliminate the parameter to find the Cartesian equation for the function:
parametric equation: x = sin t, y = 1 + cos t.
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12/10/16

can someone help me please
Suppose f(x)= 34.0+1.3log(x+1) models salinity of water to depth of 1000 meters at a certain latitude. X is the depth in meters and f(x) is in grams of salt per kilograms of seawater. Approximate... more
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12/10/16

6 hwork 1.3
Determine kso that the following has exactly one real solution. (Enter only the positive answer.)5x^2+kx+3=0
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12/10/16

13/8 word prob
An object is thrown downward with an initial velocity of 4feet per second. The relationship between the distance sit travels and time tis given by s=4t+16t2. How long does it take the object to... more
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12/09/16

Centripetal Forces Physics l
1. We know that two positive charges repel each other. a) Determine the force between two charges which are both +1C and separated by 1m.b) Why do we normally measure charge in µC instead of Coulombs? more
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12/09/16

Determine the magnitude and direction of the electric field intensity at Point p in the diagram
            . . . . . . . . . . . p . . . . . . . . . . . . . . . . . | . . . . . . . . . . . . . . . . . | . . . . . . . . . . . . . . . . . | . . . . . . . . . . . . . . . . . |8cm . . . . .... more
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12/09/16

If 5 people are paying me $340 a week how much am i making a week
 trying to figure out what i am making a year
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12/09/16

A certain sample of a mineral weighs 12.4 g and has a volume of 1.64 cm3. What is the density of this mineral?
 chemistry   
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12/09/16

1.7j-3.4 factor out the coeficent varible
Fcator out the coefificent of the variable
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12/09/16

Calculate the speeds of a 1500 N Sumo Wrestler and a 500 N Olympic diver when they hit the water after diving from 10 meters.
Calculate the speeds of a 1500 N Sumo Wrestler and a 500 N Olympic diver when they hit the waterafter diving from 10 meters.
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12/08/16

Physics Question
Our sun orbits around the centre of our galaxy (the Milky Way) once every 2.5 x 108 years. The radius of the sun’s orbit about the centre of the galaxy is approximately 3.15 x 1020 m. The sun has... more
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12/08/16

Which of the following does not determines the thermodynamical state
The options are (a) temperature (b) work (c) pressure (d) volume
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12/08/16

Determine the molar mass of each of the following gases .84 grams of a gas that occupies 450 million liters at 0 degrees Celsius at 1 atm STP
Determine the molar mass of each of the following gases .84 grams of a gas that occupies 450 million liters at 0 degrees Celsius at 1 atm STP
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12/07/16

What is the coefficient of friction of the carpet?
You need to move a 53 kg armoire across the room. If you push with a force of 68 N, and the armoire accelerates at 0.10 m/s2 squared, what is the coefficient of friction of the carpet?
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12/07/16

Calculate the acceleration of the system if the mass of block A is 0.83 kg and block b is 6.9 kg
The blocks A and B are connected by a piece of string. Block B rests on an inclined plane of 36 degrees and block a hangs vertically. The coefficient of friction between Block B and the inclined... more
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12/07/16

Forces that are equal in size but opposite in direction are called unbalanced forces
is it true or false?
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12/07/16

planetary motion
For orbiting satellites, the mass of the satellite always cancels in our centripetal force equation. Use the equation to justify why it is the satellite’s mass, and not the mass of the central... more
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12/07/16

The frequency of an electromagnetic wave varies inversely with the wavelength. If a wavelength of 200 meters has a frequency of 800 kilocycles per second.
what frequency will be associated with a wavelength of 320 meters? ___ kilocycles per second will be associated with a wavelength of 320 meters.
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12/07/16

physics homework help
Suppose you were to reduce the radius of the circular path of a ball on a string by one-half without changing the speed. How would that affect the size of the inward force (tension) in the string?... more
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12/06/16

Use the phase shift formula to rewrite
6cos2x+ 8sin2x
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