Jer
Popular questions and responses by Jer
physics
The speed of a nerve impulse in the human body is about 100 m/s. If you accidentally stub you toe in the dark, estimate the time it takes the nerve impulse to travel to your brain. (Assume that you are approximately 1.8 m tall and that the nerve impulse
asked on September 14, 2010 
Calculus I
Which of the following represents the volume of the solid formed by revolving the region bounded by the graphs of y =x^3, y = 1, and x = 2, about the line x = 2?
asked on April 22, 2016 
physics
a jet plane lands with a speed of 101 m/s and can accelerate at a maximum rate of 4.60 m/s2 as it comes to rest. (a) From the instant the plane touches the runway, what is the minimum time needed before it can come to rest? ___s b)What is the actual
asked on September 15, 2010 
chemistry
calculate the mass in grammes of copper that will be deposited by dissolving 6.5g of zinc in copper tetraoxosulphate(vi) solution
asked on November 8, 2015 
chemistry
suppose a car operates so inefficently that only 16% of the thermal energy from burning fuel is converted to useful "wheel turning" (mechanical energy) how many kj of useful energy would be stored in a 20 gallon tank of gasoline?(assume that octane burning
asked on March 31, 2011 
algebra
A motorboat traveling a distance of 225 miles in 5 hours while traveling with the current. Against the current, the same trip took 9 hours. Find the rate of the boat in calm water and the rate of the current. rate of boat mph rate of current mph
asked on November 23, 2014 
algebra
Flying with the wind, a plane traveled 390 miles in 3 hours. Flying against the wind, the plane traveled the same distance in 5 hours. Find the rate of the plane in calm air and the rate of the wind. rate of plane ? mph rate of wind ? mph
asked on November 23, 2014 
Chemistry
What is te component concentration ratio, [NO2]/[HNO2], of a buffer that has a pH of 2.42 (Ka of HNO2=7.1 x 10^4)?
asked on November 29, 2010 
calculus
Find the equation of the tangent line to the graph of f(x)=4ln(9x+2)at the point of xcoordinate x=2.
asked on May 24, 2010 
Calculus I
The area enclosed by the curve y^2 = x(2 − x) is given by what definite integral? Should I begin by square rooting both sides? Not really sure.
asked on April 22, 2016 
Calculus I
The base of a solid is the circle x^2 + y^2 = 9. Cross sections of the solid perpendicular to the xaxis are squares. What is the volume, in cubic units, of the solid?
asked on April 22, 2016 
Calculus I
Find the volume of the solid formed by rotating the region bounded by the graph of y equals 1 plus the square root of x, the yaxis, and the line y = 3 about the xaxis.
asked on April 22, 2016 
trigonometry
the base of an isosceles triangle measures 108 feet and forms an angle of 55 degrees with one equal sides. find the perimeter of the triangle
asked on January 3, 2016 
algebra
A marketing company asked 100 people whether they liked a new skin cream and lip balm. The company found that 80% of the people who liked the new skin cream also liked the new lip balm, and that 50% of the people who did not like the new skin cream liked
asked on November 27, 2014 
algebra
A goldsmith has two gold alloys. The first alloy is 30% gold; the second alloy is 80% gold. How many grams of each should be mixed to produce 10 grams of an alloy that is 40% gold? amount of 30% gold ___ g amount of 80% gold ___ g
asked on November 27, 2014 
algebra
Solve by using a system of equations. The number x of MP3 players a manufacturer is willing to sell is given by x = 20p − 1500, where p is the price, in dollars, per MP3 player. The number x of MP3 players a store is willing to purchase is given by x =
asked on November 23, 2014 
Linear Algebra  Question
I have this number that I just wanted to be sure how to do. They give me a Parallelepiped with corners lettered from A to H. Then the question is: In a certain orthonormal reference, the coordinates of points A, B, D and E are respectively A(0,0,2)
asked on April 30, 2012 
Linear Algebra  Question
I have this number that I just wanted to be sure how to do. They give me a Parallelepiped with corners lettered from A to H. Then the question is: In a certain orthonormal reference, the coordinates of points A, B, D and E are respectively A(0,0,2)
asked on April 29, 2012 
Linear Algebra  Question
I have this number that I just wanted to be sure how to do. They give me a Parallelepiped with corners lettered from A to H. Then the question is: In a certain orthonormal reference, the coordinates of points A, B, D and E are respectively A(0,0,2)
asked on April 29, 2012 
Differential Calculus
y = 1 + (x1)^(1/2) Considering the interval (2,4), calculate delta(y) and dy. would delta(y) be: delta(y) = f(4)  f(2) = (1 + squr(3) )  2 = squr(3)  1 and dy is 1/(2 squr(x1)) dx Thank you
asked on April 28, 2012 
math 118
a. Suppose a market research company finds that at a price of p = $6., they would sell x = 44 tiles each month. If they lower the price to p = $2, then more people would purchase the tile, and they can expect to sell x = 48 tiles in a month’s time. Find
asked on February 4, 2012 
physics
Traumatic brain injury such as concussion results when the head undergoes a very large acceleration. Generally, an acceleration less than 800 m/s2 lasting for any length of time will not cause injury, whereas an acceleration greater than 1000 m/s2 lasting
asked on September 14, 2010

Physics
First we have to find time, and we can do that by finding Vx and d in the equation Vx = d/t We find Vx with trig cosX*V = Vx cos32*8.5 = Vx Vx = 7.2 m/s [right] Then we find d also through trig tanX = o/a o/tanX = a a = 0.96m/tan32 a = 1.54m Then find t Vx
posted on April 10, 2020 
Physics help
yeah
posted on April 10, 2020 
Biology
Thanks dude!
posted on April 25, 2016 
Calculus I
I meant to phrase the question as, "What integral represents the volume of the solid formed by revolving the region bounded by the graphs of y =x^3, y = 1, and x = 2, about the line x = 2?"
posted on April 22, 2016 
Biology
ahrra negros
posted on September 27, 2012 
Differential Calculus
thanks!
posted on April 28, 2012