Monday
September 1, 2014

Posts by Chad


Total # Posts: 156

7th grade Math
There are 50 questions on a test. If a 60% is considered passing, how many questions do you have to get right to pass?
October 29, 2013

Mathematics
Is 27.38452... a real and a rational number?
October 22, 2013

Math
How do you write the number 339.4 X 10 -10 in scientific notation?
August 27, 2013

Math
If the length and width of a triangle are tripled, what is the effect on the area?
August 27, 2013

Math
Which expression represents the number in the pattern where "p" is the position of the number in the pattern? 20, 24, 28, 32, 36 a. 4(p +3) b. 4p - 4 c. 4p + 4 d. 4 (p+4)
August 27, 2013

Physics
A ball with a mass of 0.25 kilogram is swung on the end of a rope that is 3.0 meters long. The ball travels with a linear velocity of 10.00 meters per second. What centripetal force is acting on the ball?
May 29, 2013

Chemistry
A gas occupies 275 ml at 0°C and 610 Torr. What final temperature would be required to increase the pressure to 760 Torr, the volume being held constant?
May 2, 2013

physics
Bill has a mass of 83.6 kg. Jane has a mass of 51.0 kg. If they are seated 4.3 m apart, how much gravitational force attracts them?
April 23, 2013

Chemistry
A marathon runner will burn 1.25x10^7 j during a race. If the calorie content of 12.0 oz. of Gatorade is 80.0 kilocalories, how many ounces of Gatorade must the runner drink to provide enough energy for the race? Note: 1 Calorie=4.184j and "kilo"= 10^3
April 20, 2013

Chemistry
An alloy contains 39.5 mass% silver (Ag) and has density og 7.86 g/ml What volume of alloy would be needed to contain 12.0g of pure Ag?
April 20, 2013

Chemistry
A student uses 57.4 ml of 0.2m of RbOH to titrate 25.0ml of HcLo3. What is the concentration of HcLo3?
April 18, 2013

physics
Just wanted to say a quick thanks to Steve and Damon, figured it all out, thanks guys, awsome!!!
April 12, 2013

physics
I gave the wrong answer at first. Sorry.
April 12, 2013

physics
Sorry the answer they have is 60.5 degrees east of of north or 29.5 degrees north of east. There would be two vectors right, so do you take the degrees from the resultant? Thanks Damon, I do not nothing about this stuff at all. The question says my answer should be found by ...
April 12, 2013

physics
A boat is traveling on a bearing of 25 degrees East of North at a speed of 4 knots (a knot is 1.852 km/h). After traveling for 3 hours, the boats heading is changed to due South and it travels for an additional 2 hours at 5 knots. Using a Vector diagram, what is the resultant...
April 12, 2013

physics
Sorry Steve wrong answer, they got 60.5 degrees east of north or 29.5 degrees north of east. Sorry about that.
April 11, 2013

physics
Hi Steve, thank you. The answer for the question 81.4N at 84 degrees west of north or 6 degrees north of west. But they show no work to get the answer. I am still confused, please help me a little more. Thanks Steve.
April 11, 2013

physics
A boat is traveling on a bearing of 25 degrees East of North at a speed of 4 knots (a knot is 1.852 km/h). After traveling for 3 hours, the boats heading is changed to due South and it travels for an additional 2 hours at 5 knots. Using a Vector diagram, what is the resultant...
April 11, 2013

physics
A boat is traveling on a bearing of 25 degrees East of North at a speed of 4 knots (a knot is 1.852 km/h). After traveling for 3 hours, the boats heading is changed to due South and it travels for an additional 2 hours at 5 knots. Using a Vector diagram, what is the resultant...
April 10, 2013

physics
Hi, I am completely new to this, and missed a lot of classes due to hospital trips. Trying to cathc up but there is no sample question in my text. I dont really know how to get the numbers to make the vectors. Can you lead me in the right direction, would be very much ...
April 7, 2013

physics
A boat is traveling on a bearing of 25 degrees East of North at a speed of 4 knots (a knot is 1.852 km/h). After traveling for 3 hours, the boats heading is changed to due South and it travels for an additional 2 hours at 5 knots. Using a Vector diagram, what is the resultant?
April 7, 2013

physics
A boat is traveling on a bearing of 25 degrees East of North at a speed of 4 knots (a knot is 1.852 km/h). After traveling for 3 hours, the boats heading is changed to due South and it travels for an additional 2 hours at 5 knots. Using a Vector diagram, what is the resultant?
April 6, 2013

physics
A boat is traveling on a bearing of 25 degrees East of North at a speed of 4 knots (a knot is 1.852 km/h). After traveling for 3 hours, the boats heading is changed to due South and it travels for an additional 2 hours at 5 knots. Using a Vector diagram, what is the resultant?
April 5, 2013

Physics
I am trying to help my step son who missed half of physics class due to a funeral. A laser beam is being shot through two different materials that have been stuck together. if theta 1 = 65.5 and theta 2 = 49.8 what is the index of refraction? (I got 1.2 which is correct) but ...
April 4, 2013

science
: how much work is done by 0.020 meters squared of gas if its pressure increases by 2.0 multiplied by 10 to the 5th power Pa and the volume remains constant ?
February 27, 2013

Physics
A rowboat passenger uses an oar to push the boat off the dock by exerting a force of 40.0 N for 3.0 s. What impulse acts on the boat? What formula do I use?
February 16, 2013

Math
Mrs coopers 5th grade class has 11 more girls than boys. There are 35 students in all. How many girls are there?
January 24, 2013

math
what amount of principal would yield an interest of $36 in 3 years at a 3% simple interest rate?
January 24, 2013

Science: Physics
A force of 50 N directed at an angle of 45 degrees from the horizontal pulls a 70 kg sled across a frictionless pond. The acceleration of the sled is most nearly (sin 45 degrees = cos 45 degrees = 0.7).
December 1, 2012

physics
what is the frequency of wavelength 5.5cm travelling at 2 a speed of 1.6 m\s?
November 19, 2012

physics
A class of 11 students taking an exam has a power output per student of 122 W. Assume that the initial temperature of the room is 18.8oC and that its dimensions are 6.40 m by 14.5 m by 3.50 m. What is the temperature of the room at the end of 54.0 min if all the heat remains ...
November 10, 2012

Chemistry
Tell how to synthesize each compound. A. Ni(OH)2 B. MgSO4 C. KNO3
October 26, 2012

physcis
a flight attendant pulls her 70 kg flight bag in an airport terminal holding the handle 50 degrees above the horizontal. she pulls the bag a distance of 200 m while exerting a 40 n force acting along the handle with a constant speed how much work does the flight attendant ...
October 20, 2012

Algebra
The length of a rectangle is 5 less than twice the width. Find the dimensions if the perimeter is 110?
October 15, 2012

Physics
When you see a traffic light turn red, you apply the brakes until you come to a stop. Suppose your initial speed was 12.9 m/s, and you come to rest in 35.0 m. How much time does this take? Assume constant deceleration. What equation do I use to solve this problem? You can show...
October 4, 2012

math
90 volts are applied to a circut with 3 resistors resistor 1=20 ohms resistor 2=40 ohms and resistor 3=60 ohms how much power will be dissipated by resistor 1
September 19, 2012

Chemistry
How many moles of H_2 are needed to produce 13.27g of NH_3?
September 19, 2012

Physics
Two identical masses are connected by a (massless, stretchless) string across a (massless, frictionless) pulley. The mass on the right is held so that the string connected to it is horizontal. Everything is initially at rest; the tension is the string is zero. The mass on the ...
August 10, 2012

Physics
Bob, AKA smart guy, I already figured it out thank you very much. You obviously didn't read the question as it says don't use derived equations from the textbook. Wouldn't you assume conservation of energy and momentum equations are in the book?
August 10, 2012

Physics
A low friction cart of mass m, traveling at speed v, collides (perfectly) elastically with a cart of triple the mass, initially at rest. What is the result of this collision? (What are the final, after-collision velocities?) Do NOT use the derived equations from the textbook. ...
August 10, 2012

Physics
A flatbed truck with a box sitting on the bed accelerates from rest on level ground. The truck’s speed as a function of time is 15t –2t^2 during this acceleration. The truck reaches its maximum speed and cruises along at this speed for 4 minutes. It then slows to a ...
August 10, 2012

Physics
A 750 kg car traveling 22.0 m/s due north crashes into a 1500 kg truck traveling 20 m/s due west. The two vehicles become locked together and travel 19.0 m before stopping. Find the average frictional force (magnitude and direction) that brings the two to a stop.
August 10, 2012

Physics
The wind blows a 0.50 kg Styrofoam box, initially at rest, across level ground and then up an incline where it comes to a rest. The box slides 6.0 m on level ground before sliding up the 20.0 Ovincline. If the effective coefficient of friction between the ground and the box ...
August 9, 2012

Physics
Some object moves 220.0 m at an angle of 42° north of west. During this motion, a 68.0 N force acts on the same object, doing +5460.0 J of work on the object. Assuming the force is applied horizontal to ground, what is this force’s orientation? Is there more than one ...
August 9, 2012

Physics
A block of mass m has a spring –spring constant k and length L –connected, vertically, to the bottom. The block is dropped from height h, towards the floor. Assuming the spring is stiff enough that it does not compress fully at the floor, what is the closest distance...
August 9, 2012

Physics
Box, mass m 1 , at rest against a compressed spring, spring constant k and compression of Δx, at the top of a ramp, height h, is released. It slides down the ramp, angle θ, with friction, coefficient μ. Half way down the ramp, it bumps into and sticks to another...
August 9, 2012

Physics
Jenn Suhr recently won the gold medal in this summer’s Olympic games in pole vault. Her record is 16 ft, 2 in. (She did less than that to win gold this summer.) If all of her gravitational potential energy came only from her kinetic energy, calculate (in m/s) the running ...
August 8, 2012

Physics
In the school cafeteria, a trouble-making child blows a 12.0 g spitball through a 25.0 cm straw. The force of her breath as a function of the distance along the length of the straw can be modeled as 10-50x^2-70x^3 where force is in newtons and x is in meters. (a) How much work...
August 8, 2012

Physics
A missile launcher, mass M, at rest on a horizontal track fires a missile, mass m, horizontally. a) If the launch speed of the missile is v o , what (effective) coefficient of (kinetic) friction is required in order to stop the launcher within x meters? (b) Missile launcher ...
August 8, 2012

Physics
A missile launcher, mass M, at rest on a horizontal track fires a missile, mass m, horizontally. a) If the launch speed of the missile is v o , what (effective) coefficient of (kinetic) friction is required in order to stop the launcher within x meters? (b) Missile launcher ...
August 7, 2012

Physics
A cart is coasting at a speed v A along a straight and level road. When ten percent of the wagon’s mass is thrown off the wagon, parallel to the ground, and in the forward direction, the wagon stops. However, if this same amount of mass is thrown out the back of the wagon...
August 7, 2012

Physics
A 5.0 kg shell is fired vertically upward. At its max height of 350.0 m, it explodes into 3 pieces. A 1.0 kg chunk lands 15.0 m away, 45 O due northeast from the launch site. A second 1.0 kg piece lands 25.0 m, 60 O south of east from the launch site. If all 3 pieces land at ...
August 7, 2012

Physics
A 140 g, 90.0 mph fastball comes across the plate very nearly horizontally and is batted at 90.0 mph at a 30.0O angle (above the horizontal) toward center field. (a) Determine the impulse (in N.s) acting on the ball. (b) If the impact time is 0.00080 s, determine the average ...
August 7, 2012

Physics
A 140 g, 90.0 mph fastball comes across the plate very nearly horizontally and is batted at 90.0 mph at a 30.0O angle (above the horizontal) toward center field. (a) Determine the impulse (in N.s) acting on the ball. (b) If the impact time is 0.00080 s, determine the average ...
August 6, 2012

Physics
A 125 kg flatbottomed boat is floating along at 5.0 m/s, headed east. Sally Sue, standing at one end of the boat, starts to walk at 2.0 m/s, also to the east. If Sally’s mass is 65 kg, what is the speed of the boat as she walks along?
August 6, 2012

Physics
A car, starting from rest, accelerates down a hill reaching 30.0 m/s in 6.00 s. During this time, the driver notices that the fuzzy dice hanging by a string from the ceiling is perpendicular to the ceiling. Find (a) the angle θ of the hill and (b) the tension in the string.
July 24, 2012

Physics
The weight of an object is the same on two different planets. The mass of planet A is sixty percent that of planet B. Find the ratio of the radii of the two planets, rA/rB
July 24, 2012

Physics
A box starting from rest, slides down an incline which makes an angle of θ above the horizontal. The incline has a maximum height of h above the platform on which it sits which is itself H above the ground. The box leaves the end of the ramp and platform's edge and ...
July 24, 2012

Physics
A 565 N mountain climber moves across a rope strung across a canyon. When she is more than halfway across, she notices the rope makes a 10 degree angle (from horizontal) behind her and a 25 degree angle (from horizontal) ahead of her. What are the tensions in the rope in front...
July 24, 2012

math grade 12
It is a beautiful sunny day at Canada’s Wonderland. The U.V. index for this day is 8, or high, so sunscreen is a must for all people. The effectiveness of sunscreen is indicated by the sunscreen protection factor (SPF). The higher the SPF number the fewer U.V. rays can ...
July 23, 2012

math grade 12
1 - .012 = .988 why did you do this?
July 23, 2012

History
The red is representing the flag of England (St George's Cross) and white to represent the French royal emblem. The red maple leaf has long been the emblem and symbol of Canada. The red bands on either side represent the Pacific and Atlantic oceans, red being one of ...
July 7, 2012

Physics
A 65kg box is sitting on a level surface, and a 208N force is pulling on the box to the right. find both the normal force and acceleration of the box
July 7, 2012

physics
suppose your car is on a 5% grade,if your car weighs 15,000N what is the component of its weight parallel to the road?
July 7, 2012

algebra
Determine the slope of a line passing through the points (2, 9) and (0.66, 9).
July 3, 2012

Math
On the leeward side of the island of Oahu, in the small village of Nanakuli, about 80% of the residents are of Hawaiian ancestry. Let n = 1,2,3.... represent the number of people you must meet until you encounter the first person of Hawaiian ancestry in the village of ...
May 22, 2012

Math
Suppose you have binomial trials for which the probability of success on each trial is p and the probability of failure is q= 1-p. Let k be a fixed whole number greater than or equal to 1. Let n be the number of the trial on which the kth success occurs. This means that the ...
May 22, 2012

health
what smoking bans were put in place between 1964 and 1988
May 3, 2012

chemistry
A 0.27 sample of a weak acid with an unknown was combined with 12.0 of 3.00 and the resulting solution was diluted to 1.500 . The measured of the solution was 3.95. What is the of the weak acid?
April 17, 2012

physical science
a race car having a mass of 2550 kg is accelerated by a force of 127,500n.what is the accelerration?
February 15, 2012

physics
A block with mass m =7.3 kg is hung from a vertical spring. When the mass hangs in equilibrium, the spring stretches x = 0.21 m. While at this equilibrium position, the mass is then given an initial push downward at v = 4.5 m/s. The block oscillates on the spring without ...
February 6, 2012

chemistry
Which number is the greatest number or significant digits 17.500 or 6.022 x 10^23
February 4, 2012

chemistry
calculate[OH-],[H+] of a .20 M solution of triethylamine Kb=4.0*10^-4
January 22, 2012

social studies
a young jorge washington-
November 29, 2011

Algebra
Need help factoring 7x^2 + 7x -20
November 17, 2011

science
Which two of the 12 science processes do you feel are the most important for students to understand early in their science studies?
October 27, 2011

math modeling
86 months
October 25, 2011

chemistry
A sample of gold is at a initial temperature of 350 k. Once dropped into a coffe cup calorimeter of heat capacity 400 k^-1 it contains 50 g of water at 300 k. Specific heat capacity is 0.129 for gold and 4.18 for water. what is the final temp of all gold, coffee cup, and water.
October 12, 2011

chemistry
A sample of gold is at a initial temperature of 350 k. Once dropped into a coffe cup calorimeter of heat capacity 400 k^-1 it contains 50 g of water at 300 k. Specific heat capacity is 0.129 for gold and 4.18 for water. what is the final temp of all gold, coffee cup, and water.
October 11, 2011

physics
A ball is thrown horizontally from a height of 18.18 m and hits the ground with a speed that is 4.0 times its initial speed. What was the initial speed?
October 10, 2011

math
If there are 36 buttons in a jar and there are 3 times as many white buttons than red, how many of each are in the jar? What is the equation and how do I solve?
September 29, 2011

Chemistry
sodium carbonate trihydrate
September 7, 2011

CHEMISTRY!!!!!!! HELP PLEASE:)
1701.6
September 7, 2011

physics
A car is heading towards a brick wall at 80 km/hr, he starts breaking 30 feet away. What acceleration is required to avoid a collision?
August 9, 2011

5th grade math
average 98,76,83,91
June 12, 2011

Chemistry
a solution contains 0.133 g of dissolved lead. How many moles of sodium chloride must be added to the solution to completely precipitate all of the dissolved lead? what mass of sodium chloride must be added?
May 14, 2011

physics
hello
April 4, 2011

Math
An Adult male's heart pumps about 2.8 million liters of blood a year. If his heart beats 70 times a minute, how much blood does his heart pump with each beat? Show work
January 25, 2011

calculus
Find the volume of the solid region which lies inside the sphere x^2 + y^2 + z^2 = 2 and outside the cone z^2 = x^2 + y^2 Set up the integral in rectangular, spherical and cylindrical coordinates and solve using the easiest way. Any help would be greatly appreciatied!!! :)
November 16, 2010

algebra
assume that a jeweler needs 80 grams of an alloy that is 30% gold. He has avaliable one alloy that is 5% gold and another that is 85% gold; he will mix some of each If x equal the number of grams of the first alloy (so the number of grams of the second is 80-x), find x
October 20, 2010

computer science
It supposed to be prove {NOT,AND(NAND)} and {NOR} are universal.
October 17, 2010

computer science
Prove that {NOT, AND, NOR} are universal...
October 17, 2010

algebr7a
can anyone tell me how to use Gaussian Elimination? 3x+2y+4z=19 x+5y+2z=1
October 7, 2010

linear algebra
these equation are certain to have the solution x=y=0 for which values of c is there a whole line of solutions? cx+2y=0 2x+ay=0
October 6, 2010

Discrete Math
Determine How many integer solution there are to X1+X2+X3+x4=19 if A) 0 ¡Ü Xi for all 1 ¡Ü i ¡Ü 4 B) 0¡Ü Xi < 8 for all 1 ¡Ü i ¡Ü 4 C) 0¡ÜX1,¡Ü5,0¡ÜX2¡Ü6,3¡&...
October 4, 2010

6th grade math
$0.75 = 3 quarters $0.10 = 1 dime $0.10 = 2 nickels $0.05 = 5 pennies _______ $1.00 = total There are other ways you could do this as well, as long as you use at least 1 of each coin and you get a total of $1.00.
September 13, 2010

3rd grade
Do you wear a watch and could tell me the time? You don't always have to use every word you are given in order to combine sentences. As long as the main idea(s) are still there, you can take away and add words and still be telling or asking the same thing.
September 12, 2010

7th grade math
First, start out by simply adding the sides together into a single equation: 3x+5x-4+2x+5 Next, combine like items: 3x+5x+2x = +10x -4+5 = +1 That would leave you with: 10x+1 That is as simplified as it gets, so that means you have your answer now.
September 12, 2010

5th Grade Science
Salt is made up of Sodium (Na) and Chlorine (Cl). Salt is completely harmless when digested, as you well know. However, Sodium and Chlorine are highly poisonous and will kill you if ingested. That would be one difference.
September 9, 2010

4th grade
If this is the only information you are given, then I believe it is just a test to make sure you know your place values. As long as you have the '4' in the hundreds place and the '1' in the ones place, it doesn't matter what numbers you have in the other ...
September 9, 2010

Pages: 1 | 2 | Next>>

Search
Members