Friday
February 24, 2017

Posts by TOM

Total # Posts: 1,395

Physics
Nicole is late for work. She jumps in her car and drives to work in 3.5 minutes. Her work place is 3.85 km away from her house. The speed limit between home and work is 50 km/hour. Is Nicole speeding?
March 10, 2016

Physics
Juliet sits on her balcony while Romeo serenades her from the ground, 7.00m below. To win Juliet’s affection, Romeo throws Juliet a bouquet of roses. At what velocity must the roses be thrown if they are to reach Juliet on the balcony?.
March 10, 2016

Physics
Gary and Elaine are competing as a team in an orienteering event. They follow instructions telling them to go 50 m [N], 75 m [NE] and 100 m [30o E of S]. a) Calculate the total distance travelled b) Draw a vector diagram to determine the resultant displacement.
March 10, 2016

Physics
Consider the hip joint. The bones are normally not in direct contact , but instead are covered with cartilage to reduce friction. The space between them is filled with synovial fluid, which reduces the friction further. Due to this fluid, the coefficient of kinetic friction ...
March 8, 2016

Physics
Consider the hip joint. The bones are normally not in direct contact , but instead are covered with cartilage to reduce friction. The space between them is filled with synovial fluid, which reduces the friction further. Due to this fluid, the coefficient of kinetic friction ...
March 8, 2016

physics
Muscles are attached to bones by means of tendons. The maximum force that a muscle can exert is directly proportional to its cross-sectional area A at the widest point. We can express this relationship mathematically as F~max= σA, where σ (sigma) is a proportionality...
March 6, 2016

Chemistry 101
the mass in the end is 35.0 grams
March 4, 2016

Chemistry
yep
March 4, 2016

physics
*It was written on my homeowork that the answer for a=2.5m/s^2 and b=0.3m/s^2 but I don't know how they got that answer.
February 29, 2016

physics
Question: You live at the top of a steep (a slope of ???? degrees above the horizontal) hill and must park your 2200 kg car on the street at night. a) You unwisely leave your car out of gear one night and your handbrake fails. Assuming no significant frictional forces are ...
February 29, 2016

physics
Biophysics strikes back The Biophysics students are having their usual Saturday night biophysics party performing physics experiments at a classmate’s home. This Saturday it is in an apartment building and you notice a managemnt student (MS) passed out in the stairwell. ...
February 29, 2016

physics
Im just wondering how can you find the speed of the snowball at impact?
February 23, 2016

physics
A snowball rolls of a roof by accident. The roof is sloped 40.0 o relative to the horizontal. The edge of the roof is 14.0 m above the ground, and the speed of the snowball is 7.00 m/s as it rolls off the roof. Ignore air resistance. Coincidentally, there is a group of ...
February 23, 2016

physics
A physics professor moonlights as a daredevil jumping things on a motorbike. His next stunt will be to jump the oldman river on his motorcycle. The ramp is being built 100 m above the river and made an angle of 50.0 o relative to the horizontal. The landing ramp will be 60.0 m...
February 23, 2016

physics
A physics professor moonlights as a daredevil jumping things on a motorbike. His next stunt will be to jump the oldman river on his motorcycle. The ramp is being built 100 m above the river and made an angle of 50.0 o relative to the horizontal. The landing ramp will be 60.0 m...
February 21, 2016

Algebra
Mrs. Rodrigues was selling two kinds of raffle tickets for $1.50 and $3.50. The number of $1.50 tickets sold was 5 more than three times the number of $3.50 tickets sold. She earned a total of $1,607.50. How many $1.50 tickets were sold?
February 17, 2016

Algebra
Mrs. Rodrigues was selling two kinds of raffle tickets for $1.50 and $3.50. The number of $1.50 tickets sold was 5 more than three times the number of $3.50 tickets sold. She earned a total of $1,607.50. How many $1.50 tickets were sold?
February 16, 2016

math
William recently inherited a large sum of money; he wants to use a portion of this money to set up a trust fund for his two children. The trust fund has two investment options: (1) a bond fund and (2) a stock fund. The projected returns over the life of the investments are 3...
February 15, 2016

Chemistry
A bolt is ordered with a thread of a diameter of 1.25 inches, what is the diameter in millimeters? If the order was mistaken for 1.25 centimeter by how many millimeters would the bolt be in error?
February 14, 2016

math
80
February 11, 2016

Geometry
2 similar rectangles have areas of 6in and 24 in. What is the scale factor of the smaller rectangle to the larger rectangle?
February 10, 2016

Math (Please Help)
B.dependent on... is the correct answer!!
February 9, 2016

Physics Help!!!
A tennis ball is served 2.00 degrees above the horizontal at a height of 2.40 meters, 12.0 meters from a net that is 0.900 meters high. (a) If the tennis ball is to clear the net by at least 0.200 meters, what is its minimum initial velocity? (b) If the tennis ball clears the ...
February 9, 2016

physics
A tennis ball is served 2.00 degrees above the horizontal at a height of 2.40 meters, 12.0 meters from a net that is 0.900 meters high. (a) If the tennis ball is to clear the net by at least 0.200 meters, what is its minimum initial velocity? (b) If the tennis ball clears the ...
February 9, 2016

physics
I just can't find out what direction it needs to go.
February 9, 2016

physics
Canadian snowbirds usually follow the I-15 at a speed of about 120 kilometers per hour. Canadian geese, on the other hand, migrate approximately along a north-south direction for well over a thousand kilometers in some cases, traveling at speeds up to about 100 kilometers per ...
February 9, 2016

physics
Canadian snowbirds usually follow the I-15 at a speed of about 120 kilometers per hour. Canadian geese, on the other hand, migrate approximately along a north-south direction for well over a thousand kilometers in some cases, traveling at speeds up to about 100 kilometers per ...
February 8, 2016

physics
A game of tennis... A tennis ball is served 2.00 degrees above the horizontal at a height of 2.40 meters, 12.0 meters from a net that is 0.900 meters high. (a) If the tennis ball is to clear the net by at least 0.200 meters, what is its minimum initial velocity? (b) If the ...
February 8, 2016

physics
Canadian snowbirds usually follow the I-15 at a speed of about 120 kilometers per hour. Canadian geese, on the other hand, migrate approximately along a north-south direction for well over a thousand kilometers in some cases, traveling at speeds up to about 100 kilometers per ...
February 8, 2016

physics
A tennis ball is served 2.00 degrees above the horizontal at a height of 2.40 meters, 12.0 meters from a net that is 0.900 meters high. (a) If the tennis ball is to clear the net by at least 0.200 meters, what is its minimum initial velocity? (b) If the tennis ball clears the ...
February 8, 2016

physics
The froghopper, Philaenus spumarius, holds the world record for insect jumps. When leaping at an angle of 58.0 degrees above the horizontal, some of the tiny critters have reached a maximum height of 58.7 cm above the level ground. (See Nature, Vol. 424, 31 July 2003, p. 509...
February 8, 2016

physics
A ski jumper leaves a slope at an angle of 20.0 degrees above the horizontal direction. She lands 3.50 seconds later at a point 20.0 meters below her take-off point. (a) What was her initial speed? (b) How far does she travel horizontally?
February 7, 2016

algebra
Find the midpoint of the line segment joining the points P1 and P2 P1= (5,2) P2= (-4,3) tom
February 5, 2016

algebra
Find the midpoint of the line segment joining the points P1 and P2 P1= (5,2) P2= (-4,3) tom
February 4, 2016

physics
Falls resulting in hip fractures (or head injuries) are a major cause of injury and even death to the elderly. Typically, the hip’s speed at impact is about 2.0 meters per second. If this can be reduced to 1.3 meters per second or less, the hip will usually not fracture. ...
February 1, 2016

physics
It has been suggested, and not facetiously, that life might have originated on Mars and been carried to Earth when a meteor hit Mars and blasted pieces of rock (perhaps containing primitive life) free of the surface. Astronomers know that many Martian rocks have come to Earth ...
February 1, 2016

Maths
The volume of a pyramid with a square base is given by the expression 1/3s square h, where she is the length of a side of the base and h is the height. Find the volume of a pyramid with a square base of side length 24 feet and a height of 30 feet.
January 31, 2016

College Algebra
Find all real and complex roots and type complex answers in the form a+bi. x^4-9x^2+20=0
January 30, 2016

math
frank has 100 geese and cows on his farm. The animals have a total of 340 legs. How many geese and cows does frank have?
January 29, 2016

physics
(a) In 2009, Usain Bolt ran the last 100 meters of the 150-meter race in 8.70 seconds. What is Usain Bolt’s speed? (b) The world record for the 100-meter dash is 9.58 seconds (Bolt, 2009). Use the speed from part (a) as his maximum velocity. Assume a sprinter accelerates ...
January 26, 2016

physics
(a)The world record for the 100-meter dash is 9.58 seconds (Bolt, 2009). Use the speed from part (a) as his maximum velocity. Assume a sprinter accelerates at a constant rate up to their maximum velocity, which is maintained for the remainder of the race, no matter how long it...
January 26, 2016

physics
A biophysics student measures her reaction time by having a friend drop a meterstick between her fingers. The meterstick falls 0.300 meters before she catches it. (a) What is her reaction time? (b) Estimate the minimum average speed of nerve impulses going from her eye to her ...
January 25, 2016

Physics
(a) In 2009, Usain Bolt ran the last 100 meters of the 150-meter race in 8.70 seconds. What is Usain Bolt’s speed? (b) The world record for the 100-meter dash is 9.58 seconds (Bolt, 2009). Use the speed from part (a) as his maximum velocity. Assume a sprinter accelerates ...
January 25, 2016

Physics
(a) A magazine article states that cheetahs are the fastest sprinters in the animal world and that a cheetah was observed to accelerate from rest to 70 kilometers per hour in 2 seconds. What average acceleration in meters per second squared does this require? (b) The article ...
January 25, 2016

Physics
A biophysics student measures her reaction time by having a friend drop a meterstick between her fingers. The meterstick falls 0.300 meters before she catches it. (a) What is her reaction time? (b) Estimate the minimum average speed of nerve impulses going from her eye to her ...
January 25, 2016

geometry h
The midpoint of Line AB has coordinates (-3,2) and the coordinates of point A are (1.4). What are the coordinates of point B?
January 14, 2016

math
y= mx + b (1/2) is the slope. m in the equation is the slope (0,5) x= 0 y or b= 0 y=1/2x + 5
January 14, 2016

MATH HELP !!!!!
Wow... thank you so much! Because I was wondering because I take health and it meets twice a cycle.
December 19, 2015

MATH HELP !!!!!
60 classes?
December 19, 2015

MATH HELP !!!!!
There are 180 days of school; 40 weeks. You have a six day cycle in your schedule. You have health twice a cycle (2 days out of 6 days in the six day cycle). How many classes of health?
December 19, 2015

3rd grader
How did you study multiplication fact?
December 17, 2015

math
what is the product of the number 27
December 15, 2015

Chemistry
Usually, copper should be reduced by the zinc, why does being in an alloy change this?
December 9, 2015

Chemistry
Alloys of copper and zinc are used to produce brass. Why do these elements not react in this application?
December 9, 2015

Social Studies
what are two actions outlawed by the english bill of rights?
December 8, 2015

Precalculus
2cos^2(theta) + Sin(theta)=1 I know I have to use the quadratic formula but i'm having trouble after I convert the Cos^2(theta) to (1-Sin^2(theta))
December 2, 2015

Precalculus
I have a precalculus test tomorrow and I've been studying nonstop for the past few days but I've been struggling because it has been 8 years since the last math class I have taken. My question is about half-angle formulas, My professor taught us that they are: Sin(...
December 2, 2015

Chemistry
Benadryl is an over-the-counter drug used to treat allergy symptoms. The formula of benadryl is C17H21NO. How many moles of C are present in 0.759 mole of benadryl?
November 27, 2015

algebra
the length of a rectangle is 10 feet more than twice the width. The perimeter is 110 feet. Find the dimensions.
November 25, 2015

Chemistry
An aqueous solution of KF is add dropwise to an aqueous micture containing 0.25M Ca2+ and 0.75M Mg2+ calcuate the minimum molarity of F that is nessaryvto initate the precipitation of each salt? Which precipitate first? Ksp of CaF2 :5.4x10^-9 Ksp of MgF2 :3.6x10^-8
November 21, 2015

school math 3rd grader
how you find the solution to your subtraction problem without doing any calculation, Damon? explain
November 18, 2015

school math 3rd grader
how you write a subtraction word problem related to this addition word problem Ms Sue?
November 18, 2015

school math 3rd grader
how u find solution for addition problem Ms Sue ?
November 18, 2015

school math 3rd grader
Meg spent $3.75 on candy and $4.89 on toys. How much did she spend in all? Find the solution to your subtraction problem without doing any calculation. Explain.
November 18, 2015

school math 3rd grader
how to find solution to subtraction problem without doing any calculation. explain?
November 18, 2015

Algebra 2
Simplify the following exponents. (3x^ay^bz^c)(-y^fz^g)
November 12, 2015

Algebra 2
Simplify the following exponents. (3m^2n^7/m)^5
November 12, 2015

Algebra 2
A share of ABC stock was worth $60 in 2005 and only worth $45 in 2010. Find the multiplier and the percent decrease.
November 12, 2015

algebra1
6 + x/-8 = 4/7 what does x =
October 3, 2015

AP Calculus
a norman window is constructed by adjoining a semicircle to the top of an ordinary rectangular window. find the dimensions of a norman window of maximum area if the total perimeter is 72 units. Base value is 21.
October 1, 2015

Fire protection eng
20,500 gallons of kerosene spill into a banked up area that measure 20 foot x 10 foot how long will the fire last it is left unattended ? 1 gallon = 3.785 liter 1000 liters = 1 m^3 1in = 2.54 cm 1ft = 12 in
September 29, 2015

science
so using an instrument to extend the power of an observation isnt itself an observation?
September 25, 2015

science
i put 2 on my test can u explain why its 2.
September 25, 2015

science
a student is observing a rock. which of the follwoinf is an observation 1. the rock is 55g in mass 2. the rock is over billions of years old
September 25, 2015

Object oriented programming
The Romance World Cruise Line provides special gifts for passengers who are newlyweds, as well as for those who have been married more than 40 years. Design a pseudocode for a program that accepts a couple's last name, ship cabin number, and number of years married. ...
September 24, 2015

Programming
What's the rest of the the pseudocode
September 22, 2015

College Physics
At a firing range, a target is placed 300 m from where someone is firing a rifle. The muzzle speed of this rifle is 700 m/s. If the rifle is aimed directly at the center of the target, by how far will the target miss? At what angle would the rifle need to be aimed at to hit ...
September 14, 2015

Precal
The velocity v of a fluid flowing in a conduit is inversely proportional to the cross- sectional area of the conduit.( Assume that the volume of the flow per unit of time is held constant .) Determine the change in the velocity of water flowing from a hose when a person places...
September 10, 2015

Math
The height (in centimeters) of a candle is a linear function of the amount of time (in hours) it has been burning. When graphed, the function gives a line with a slope of −0.6 Suppose that the height of the candle after 19 hours is 9.6 centimeters. What was the height ...
September 8, 2015

Math
Are you going to wait the four hours until the quiz expires or do you have a plan B?
September 7, 2015

Math
Scores not possible are: 1,2,4,5,8,11....and then what? 12 = 4 x 3 13 = 7+3+3 14= 7 x 2 and every number higher has to be possible because we have 12, 13, and 14 possible, and any higher number can be obtained by adding 3 to any of these 3. So, 11 is the highest number that is...
August 24, 2015

JOb interview
here are a few people in line waiting to be served. You are taking care of one customer and she insists you gave her the incorrect change. You know you didn't. What do you do?
August 17, 2015

JOb interview
here are a few people in line waiting to be served. You are taking care of one customer and she insists you gave her the incorrect change. You know you didn't. What do you do?
August 17, 2015

JOb interview
here are a few people in line waiting to be served. You are taking care of one customer and she insists you gave her the incorrect change. You know you didn't. What do you do?
August 16, 2015

JOb interview
Briefly explain why you feel you are the ideal candidate for this position.This field is mandatory
August 16, 2015

JOb interview
Please provide an example of your best customer service situation. Explain why the service you provided was so successful
August 16, 2015

JOb interview
here are a few people in line waiting to be served. You are taking care of one customer and she insists you gave her the incorrect change. You know you didn't. What do you do?
August 16, 2015

alg1
solve for 8m^2 +20m=12 for m by factoring
August 5, 2015

Math velocity
A ball is thrown straight up from the edge of the roof of a 60.0 m tall building. If a second ball is dropped from the roof 2.0 s later what must the initial velocity of the first ball be if both are to reach the ground at the same time?
June 22, 2015

MATH URGENT
find the average rate of change between f(-4) and f(-1) in the function f(x)= x^2+2x-8
June 1, 2015

Calculus
For f(x)=(1-x)/(1+x) and g(x)=x/(1-x) , find the simplified form for f [g(x)] and state the domain
May 27, 2015

Calculus
Use the table below to evaluate d/dx [f[g(2x)]] at x = 1 x 1 2 3 4 f(x) 6 1 8 2 f '(x) 6 1 8 2 g(x) 1 4 4 3 g '(x) 9 5 5 -4
May 27, 2015

Calculus
Which of the following functions is continuous at x = 5? I put a for my answer, could someone please check this? a. f(x)=(x^2-25)/(x+5) b. (x^2-25)/(x-5), x cannot equal 5 20 when x equals 5 c.(x^2-25)/(x-5), x cannot equal 5 0 when x equals 5 d. all of the functions are ...
May 21, 2015

Calculus
So would that mean that it is only the first one?
May 20, 2015

Calculus
Which of the following statements is/are true? I.If f '(c) = 0, then f has a local maximum or minimum at x = c. II.If f is continuous on [a, b] and differentiable on (a, b) and f '(x) = 0 on (a, b), then f is constant on [a, b]. III.The Mean Value Theorem can be ...
May 20, 2015

Calculus
The function's value will always be greater than or equal to the local linear approximation of a function f if, for all x in an interval containing the point of tangency, f " > 0 f " < 0 f ' > 0 f ' < 0
May 20, 2015

Calculus
The function's value will always be greater than or equal to the local linear approximation of a function f if, for all x in an interval containing the point of tangency, f " > 0 f " < 0 f ' > 0 f ' < 0
May 20, 2015

Math
Maya made a sign with area of 48 square centimeters. Use a centimeter grid paper to draw a shape that shows what her sign could look like?
May 20, 2015

Science
Check my answers pls
May 19, 2015

Science
1.A weatherman reports, “The storm waves are about 2 meters high and about 35 meters apart.” What properties of waves is the reporter describing? (1 point) A.frequency and wavelength B.wavelength and wave speed C.amplitude and wavelength D.amplitude and frequency 2. ...
May 19, 2015

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