Tuesday

September 16, 2014

September 16, 2014

Number of results: 20,391

**math**

your basement has an 8 3/12 foot ceiling.To the nearest half foot,how tall is the tallest cabinet that can fit in the basement.
*January 26, 2010 by Anonymous*

**math**

given an 8 foot by 10 foot wall how many 6 inch square tiles would be needed to cover the wall
*March 1, 2011 by margie*

**physics**

An elevator is being lifted up an elevator shaft at a constant speed by a steel cable. All fricional effects are negligible. In this situation,forces on the elevator are such that?: A.the upward force by the cable is greater than the downward force of gravity B. the upward ...
*July 2, 2011 by alexa*

**Science ~CHECK ANSWERS PLEASE~**

#1. Kilometers per hour describes the speed of an object. ture false **** #2. Which of the following reference points would allow you to observe the speed of a car that you are traveling in? a) an airplane flying across the sky b) a car traveling next to you at the same speed ...
*February 27, 2014 by Mindy *

**pysc**

an object A 2.5kg is traveling at 25meters per second collides head on with a 5kg mass b calculate the velocity of the 5kg mass if 1.the mass b is initially at rest 2.traveling opposite to mass A at 20m/s 3.traveling in the same direction as A at 12m/s
*March 5, 2011 by shristi*

**Calculus/Physics Please help!!**

An intravenous line provides a continuous flow of drug directly into the blood. Assuming no initial drug in the blood, the amount of drug in the blood t hours after the dosing begins in m(t) - (a/k)(1-e^-kt), for t (=>)0, where k is the rate constant (again related to half ...
*April 17, 2012 by Jake*

**Physics**

A cylinder (I = 1/2 MR2), a sphere (I = 2/5MR2), and a hoop (I = MR2) roll without slipping down the same incline, beginning from rest at the same height. All three objects share the same radius and total mass. Which object has the greatest kinetic energy at the bottom of ...
*March 19, 2011 by John*

**Physics**

A car weighs 15000-N and is traveling along a highway at 27 m/s. If the driver immediately applies his brakes and the car comes to rest in 85 m, what net force acts on the car during its acceleration? How do you solve this to get an answer of -6564N? Thanks!
*December 22, 2010 by ihatephysics*

**Algebra2**

Help? Write an equation for the line in point/slope form and slope/intercept form that has the given condition. 4. Slope = 3/2 and passes through the origin. 5. x-intercept = 4 and y-intercept = -3
*November 28, 2012 by Victoria*

**physics**

A 0.25 kg skeet (clay target) is fired at an angle of 30 degrees to the horizon with a speed of 25 m/s. When it reaches the maximum height, it is hit from below by a 15 g pellet travelling upward at a speed of 200 m/s. The pellet is embedded in the skeet. (a) How much higher ...
*August 19, 2010 by joy*

**volume**

A cylindrical aquarium has a 10 foot diameter and an 18 foot height and holds 10,400 gallons of water. What is the aquariums's volume in cubic feet?
*March 25, 2011 by Natalie*

**College math**

1.Find the height to the nearest foot of a tree that makes a 50-foot shadow when a 2 ft. 6 in. pole is used to make a shadow of 3 feet.
*April 26, 2012 by Tammy*

**Pre-Alegebra**

A 25 foot tall flagpole cast =s a 20 foot shadow. If a man with a height of 6 feet stands nearby, what will be the lenghth of this shadow?
*February 10, 2014 by Shela*

**physics**

a ramp was used to lift 25000kg block. block rose 2m in height traveling 30 m along the ramps surface how much uphill friction is needed to push it up the ramp at constant velocity?
*January 30, 2013 by Garnel*

**pyshics**

A small rock moves in water, and the force exerted on it by the water is given by the equation Fd = kv, where k is a constant. The terminal speed of the rock is measured and found to be 2.0m/s. The rock is projected upward at an initial speed of 6.0m/s. You can ignore the ...
*October 19, 2011 by Timothy*

**math**

how tall would a statue of a 5 foot 6 inch woman be if the scale for the statue is 1 foot 8 inches
*February 3, 2013 by liz*

**Physic**

Just an instant before reaching the very bottom of a semicircular section of a roller coaster ride, the automatic emergency brake inadvertently goes on. Assume the car has a total mass of 850 kg, the radius of that section of the track is 53.0 m, and the car entered the bottom...
*May 8, 2011 by Jason*

**Physics**

An object is attached to a horizontal spring. It is initially displaced by distance Δx from the equilibrium position and then released from rest. At what point of its motion along the x-axis reaches the object its highest total energy a) At the equilibrium position b) At ...
*December 1, 2010 by Michael*

**math**

your kitchen has a 9 3/4 foot ceiling.To the nearest half foot,what is the tallest refrigerator that can fit in the kitchen under a cabinet that hangs down 3 feet?
*January 26, 2010 by Anonymous*

**math**

Louise is creating a 1-foot long comic strip. If she has marked 0.5 on her paper, what should she do to find 1 foot? Subtract 0.5 Add 0.2 Multiply 0.5 Add 0.5
*March 27, 2012 by destiny*

**trig**

a 7 foot tall man is standing 65 feet away from a tower. if the angle of elevation is 35 degrees. what is the height of the tower to nearest tenth of a foot?
*April 18, 2012 by jonathan*

**Help 2!!**

3. You are sliding a big cabinet down a truck ramp for a customer. You must maintain control of the cabinet because it is very heavy. There are 2 ramps in the building. The equation of ramp 1 is y = 2x + 7 and the equation of ramp 2 is y = 3 x + 7. Which is the safest ramp to ...
*October 13, 2006 by Margie*

**physic**

Hi!Question:Two packing crates of masses m1 = 10.0 kg and m2 = 6.50 kg are connected by a light string that passes over a frictionless pulley as in the figure below. The 6.50 kg crate lies on a smooth incline of angle 45.0°. Find the acceleration of the 6.50 kg crate. ...
*October 9, 2009 by Chan*

**physics**

A daredevil leaves the end of a ramp with a speed of 32.0 m/s if his speed is 29.8 m/s when he reaches the peak of the path, what is the maximum height that he reaches? how do i do thiss?
*October 23, 2010 by Maddy*

**physics**

A daredevil leaves the end of a ramp with a speed of 32.0 m/s if his speed is 29.8 m/s when he reaches the peak of the path, what is the maximum height that he reaches? how do i do thiss?
*October 23, 2010 by Maddy*

**college algebra**

I NEED TO WRITE AN EQUATION OF THE LINE WITH THE GIVEN SLOPE AND GIVEN Y-INTERCEPT LEAVE ANSWER IN SLOPE-INTERCEPT FORM SLOPE -2/3,Y-INTERCEPT (0,5)
*May 28, 2011 by sharon*

**physics**

A 1 kg object starts 3 meters from the ground on a 24 degree incline with a friction coefficient of 0.12. When it hits the ground, it collides and sticks to a 8 kg object. The coefficient friction on the horizontal surface is 0.24 How far do the objects travel away from the ...
*December 21, 2008 by matt*

**Calculus**

a 5m ladder rests against a vertical wall. The top of the ladder begins sliding down the wall at 2m/sec, while the foot of the ladder moves away from the base of the wall. How fast is the foot of the ladder moving away from the wall at the instant the foot of the ladder is 4m ...
*December 21, 2012 by Lost One*

**9th grade acc. algebra**

how do you do this? this is the full question and all info: "A line with a slope of -3 passes through the point (k,4). Find the y-intercept of the line in terms of k." I would like to know how to do this along with the answer so i can know im doing it right please!!
*April 6, 2010 by alyssa*

**Physics**

A 607-kg elevator starts from rest and moves upward for 4.40 s with constant acceleration until it reaches its cruising speed, 1.73 m/s. (a) What is the average power of the elevator motor during this period? . (b) How does this amount of power compare with its power during an...
*October 3, 2012 by KK*

**physics**

A 650-kg elevator starts from rest and moves upward for 2.80 s with constant acceleration until it reaches its cruising speed, 1.64 m/s. (a) What is the average power of the elevator motor during this period? W (b) How does this amount of power compare with its power during an...
*October 12, 2012 by monic*

**Physics 6A**

A 330- piano slides 3.8 down a 23 incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. a.Determine the work done by the force of gravity. b.Determine the work done by the man on the piano.
*May 11, 2012 by Daisy*

**PHYSICS**

Which machines has more mechanical advantage pulley or incline plane? I asked this question before but did not quite understand the answers that were given to me. I think that the incline plane has more mechanical advantage in a friction less environment.
*June 28, 2011 by Jordan*

**Trig**

A cylindrical tank, 6 foot in radius, lies on it's side parallel and against the side of a warehouse. A ladder leans against the building, passes over and just touches the tank, and has a slope of -3/4. Find the equation of the ladder and the length of the ladder
*September 23, 2012 by Mary*

**g.k.**

A. A car is traveling at a speed of 55 mi/hr along a banked highway having a radius of curvature of 500 ft. At what angle should the road be banked in order that a zero friction force is needed for the car to go around this curve?
*April 18, 2012 by anirudh dhiman*

**Physics**

Consider a circuit with an RL series with L=0.09 H and R=0.05 Ohm. At t=0 the circuit is connected to a battery which provides V0=12 V. (a)How long does it take to the current to equal a fraction 0.95 of the steady state current? (b) What is the energy stored (in Joules) in ...
*April 13, 2013 by tanvir ali *

**Process Technology **

How many minutes will it take for an oil well producing 350 barrels of oil per day to fill a 14 foot diameter by 49 foot tall tank?
*January 7, 2012 by Cori*

**Geometry**

A wheel has a radius of 1 foot. to the nearest foot, how far will the wheel travel in 50 revolutions?
*May 23, 2011 by kayla*

**Math**

At a certain time of day, a 5 foot 8 inch woman casts a 3 foot 1 inch shadow. How tall is a nearby tree that casts a 13 foot 7 inch shadow at the same time of day?
*October 17, 2012 by Elbunie*

**math**

solve and writein simplest terms: 3 yards 1 foot 10 inches+ 5 yards 2 feet 4 inches 8 yards 3 feet 14 inches 8 yds 4 feet 2 inches 9 yards 1 foot 2 inches. check that. you need to convert everything into inches 1 yard = 16 inches 1 foot = 12 inches The answer would be: 178 inches
*March 5, 2007 by halida*

**physics**

A red train traveling at 72 km/h and a green train traveling at 144 km/h are headed toward one another along a straight, level track. When they are 950m apart, each engineer sees the others train and applies the brakes. The brakes decelerate each train at the rate of 1 m/s^2...
*September 17, 2006 by ben*

**physics # 1**

1. If a particle moves in a plane so that its position is described by the function x = Acosłt, and y = Asinłt, it is a.) moving with varying speed along a circle b.) moving with constant speed along a circle c.) moving with constant acceleration along a straight line d.) ...
*August 7, 2007 by gomez*

**Algebra (math)**

1. The equation y=-1777x+27,152 can be used to predict the number of y of gun deaths in the U.S. x years after 2000, that is x=0 corresponds to 2000, x=3 corresponds to 2003, x=4 corresponds to 2004 and so on. Predict the number of gun deaths in 2004 and 2007. In what year ...
*November 4, 2009 by scooby*

**Algebra (math)**

The equation y=-1777x+27,152 can be used to predict the number of y of gun deaths in the U.S. x years after 2000, that is x=0 corresponds to 2000, x=3 corresponds to 2003, x=4 corresponds to 2004 and so on. Predict the number of gun deaths in 2004 and 2007. In what year will ...
*November 5, 2009 by scooby*

**Algebra (math)**

The equation y=-1777x+27,152 can be used to predict the number of y of gun deaths in the U.S. x years after 2000, that is x=0 corresponds to 2000, x=3 corresponds to 2003, x=4 corresponds to 2004 and so on. Predict the number of gun deaths in 2004 and 2007. In what year will ...
*November 5, 2009 by scooby*

**maths-perimeter**

A circular pond has a 95cm wide foot path along the edge.A man walks around theouter edge of te footpath of 55cm long steps.In 640 steps he makes a full round.What is the radius of the pond
*March 3, 2013 by Anonymous*

**College physics**

An airplane is cruising along in a horizontal level flight at a constant velocity, heading due west. (a) If the weight of the plane is 5.54 104 N, what is the net force on the plane? (b) With what force does the air push upward on the plane?
*June 6, 2011 by Amanda*

**geometry**

Please use this for the portfolio. You will need graph paper. 1. Start with Triangle ABC with vertices: A(0,2), B(2,5), C(3,0) 2. Find slope of side AB and BC 3. Now TRANSLATE the Triangle 4 units left, and 2 units up (x-4,y+2) and give the new vertices to find A', B', C' 4. ...
*April 7, 2014 by brit*

**science**

when you make the proper adjustments, your sub begins traveling with the currents of the thick, yellow jelly and heading toward you. You try to avoid the gaint bag, but the cellular current races you straight toward it. The bag splits apart for a second and swallows you whole...
*September 19, 2007 by Chelsey*

**physics**

A roller coaster at an amusement park has a dip that bottoms out in a vertical circle of radius r. A passenger feels the seat of the car pushing upward on her with a force equal to 2.6 times her weight as she goes through the dip. If r = 20.0 m, how fast is the roller coaster ...
*November 23, 2010 by Colin*

**Physics**

A chain composed of four identical links is suspended by a rope and does not move. How many force vectors would be drawn on the free body diagram of each link and which direction would they point? My answer: ---------- FIRST LINK (top): Upward force from rope (tension), ...
*September 21, 2010 by Stanley*

**Physics**

An inclined plane is on a table 1.4m tall. A 6kg box is hanging vertically attached to a 2kg mass on a plane with an unknown incline plane with coefficient of sliding friction of .2 . a. determine the acceleration of the system. b. if the plane is 3.5m long and the blacks ...
*December 10, 2010 by Mitch*

**helpp in physics! so tough!**

A diver springs upward with an initial speed of 2.0 m/s from a 2.5-m board. Find the velocity with which he strikes the water. Hint: When the diver reaches the water, his displacement is y = -2.5 m (measured from the board), assuming that the downward direction is chosen as ...
*September 28, 2010 by MC*

**math algebra (plz help ty)**

The equation y=-1777x+27,152 can be used to predict the number of y of gun deaths in the U.S. x years after 2000, that is x=0 corresponds to 2000, x=3 corresponds to 2003, x=4 corresponds to 2004 and so on. Predict the number of gun deaths in 2004 and 2007. In what year will ...
*November 5, 2009 by scooby*

**algebra**

Find the slope-intercept equation for the line with the indicated slope-intercept slope 5/8; y-intercept (0,-3)
*July 11, 2014 by sharon*

**College Algebra**

A ball is thrown up from a twelve foot platform with an initial velocity of 112 feet/second. The formula that describes the height of the ball in terms of time is: f(t) = -16t^2+112t+12. Determine the time at which the ball reaches its maximum height. Determine the maximum ...
*August 11, 2011 by Lauren Marie*

**math,help**

What is the equation i have to use for the following question A roof rises 9.75 ft over a horizontal distance of 15.84ft. What is the slope of the roof to the nearest hundredth? Slope is given by slope=rise/run So what is the rise and what is the run?
*March 31, 2007 by jacky*

**Calculus**

A fence 5 feet tall runs parallel to a tall building at a distance of 2 feet from the building. We want to find the the length of the shortest ladder that will reach from the ground over the fence to the wall of the building. Here are some hints for finding a solution: Use the...
*July 17, 2013 by J*

**Physics**

A sand bag is dropped out of a balloon traveling upward at speed of 2.3m/s. A kiddo drops a bag at the instant the balloon is 34m above the ground. How long does it take the sand bag to hit the ground? I got -2.41s why?
*February 9, 2014 by Sally*

**alg.**

Find the slope of any line parallel to the line through points (17, 4) and (5, 8). the slope of these is: 8-4 4 1 ----- = --- = --- 17-5 12 3 is 1/3 the correct answer? No you started with the y of the second point, so you have to start with the x of the second point also ...
*July 30, 2007 by lacy*

**algebra**

The equations are 6.5x + 8.3y + 7.1 = 0 and -7.2x + 3.4y - 6.6 = 0. Find the slope and x and y intercepts of each equation. For the first equation I got the x intercept as -10.92 and y intercept as -8.55 but I can't figure out the slope. For the second one i got the x as -.915...
*September 23, 2010 by robbie*

**physic**

Calculate the pressure exerted on the ground by a79kg person standing on one foot. Assume that the bottom of the person's foot is 13cm wide and 28cm long.
*July 21, 2010 by steve*

**Pre Cal**

a 6 foot person is standing x feet away form a 10 foot lamppost. What is the distance d from the base of the lamppost to the end of the persons shadow, espressed as a function of x.
*July 24, 2011 by Ashley*

**Physics**

A car (mass = 1150 kg) is traveling at 32 m/s when it collides head-on with a sport utility vehicle (mass = 2550 kg) traveling in the opposite direction. In the collision, the two vehicles come to a halt. At what speed was the sport utility vehicle traveling?
*April 1, 2008 by Will*

**Physics**

A car (mass = 1180 kg) is traveling at 36 m/s when it collides head-on with a sport utility vehicle (mass = 2380 kg) traveling in the opposite direction. In the collision, the two vehicles come to a halt. At what speed was the sport utility vehicle traveling?
*February 22, 2011 by Lauren*

**Physics**

A car (mass = 1070 kg) is traveling at 40 m/s when it collides head-on with a sport utility vehicle (mass = 2570 kg) traveling in the opposite direction. In the collision, the two vehicles come to a halt. At what speed was the sport utility vehicle traveling?
*November 9, 2011 by Taylor*

**physics**

A car (mass = 1100 kg) is traveling at 33.0 m/s when it collides head-on with a sport utility vehicle (mass = 2800 kg) traveling in the opposite direction. In the collision, the two vehicles come to a halt. At what speed was the sport utility vehicle traveling?
*May 3, 2012 by !@#$%^&al*

**Physics**

A car (mass = 1080 kg) is traveling at 25.4 m/s when it collides head-on with a sport utility vehicle (mass = 2750 kg) traveling in the opposite direction. In the collision, the two vehicles come to a halt. At what speed was the sport utility vehicle traveling?
*January 2, 2013 by Tim*

**Math-Linear Equations**

Please let me know if I understand this correctly. Find the slope and the y-intercept of each equation: 1)y-9x= 1/2 +9x= 1/2 + 9x y= 1/2 + 9x slope:9; y-intercept: 1/2 2)2y-6=3x +6 +6 2y=3x + 6 - - 2 2 so then: y=3x+3 3) -2y=6(5-3x) -2y= 30-18x - -- -2 -2 so then: y=-15-18x (...
*January 16, 2012 by Kate*

**dynamics**

traveling with an initial speed of 70km/h. a car accelerates at 6000km/hr^2 along a straight road. how long will it take to reach a speed of 120km/hr? also, through what distance does the car travel during this time.?
*April 18, 2012 by chanz11*

**physics**

Please Help.... A car (mass = 1170 kg) is traveling at 43 m/s when it collides head-on with a sport utility vehicle (mass = 2460 kg) traveling in the opposite direction. In the collision, the two vehicles come to a halt. At what speed was the sport utility vehicle traveling?
*October 26, 2010 by baily*

**physics**

A car (mass=1100kg) is traveling at 32m/s when it collides head on with a sport utility vehicle (mass=2500kg) traveling in the opposite direction. In the collision, the two vehicles come to a halt. at what speed was the sport utility vehicle traveling.
*March 12, 2012 by Natasha*

**physics**

A car (mass=1100kg) is traveling at 32m/s when it collides head on with a sport utility vehicle (mass=2500kg) traveling in the opposite direction. In the collision, the two vehicles come to a halt. at what speed was the sport utility vehicle traveling.
*March 12, 2012 by Natasha*

**Physics**

A cylinder ( I = 1/2 MR2), a sphere ( I = 2/5 MR2), and a hoop ( I = MR2) roll without slipping down the same incline, beginning from rest at the same height. All three objects share the same radius and total mass. Which object has the greatest translational kinetic energy ...
*March 19, 2011 by John*

**Math**

Train A and Train B are traveling towards each other but are 2,100 miles apart. Train A is traveling at 50 mph and Train B is traveling at 35 mph. When will they collide?
*January 28, 2009 by Lor*

**Aberdeen**

A model rocket is launched straight upward with an initial speed of 40.0 m/s. It accelerates with a constant upward acceleration of 2.50 m/s2 until its engines stop at an altitude of 120 m.
*September 20, 2010 by James*

**physics**

A car (mass = 1150 kg) is traveling at 26.7 m/s when it collides head-on with a sport utility vehicle (mass = 2030 kg) traveling in the opposite direction. In the collision, the two vehicles come to a halt. At what speed was the sport utility vehicle traveling? Include units.
*July 11, 2013 by rodney*

**physics**

Two blocks, A and B (with mass 50 kg and 100 kg, respectively), are connected by a string, as shown in the figure below. The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between block A and the incline is µk = 0.24. Determine the change in...
*October 26, 2009 by Chan*

**physics... last one **

Two blocks, A and B (with mass 50 kg and 100 kg, respectively), are connected by a string, as shown in Figure P5.63. The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between block A and the incline is µk = 0.23. Determine the change in the...
*November 10, 2010 by clueless*

**Physics**

A car traveling at 20 m/s accelerates at 7 m/s2 for 3 sec. How fast is it now traveling? Please help!
*January 15, 2013 by Jamie*

**Physics**

A rocket is fired vertically with an upward acceleration of 30 m/s2. After 20 s, the engine shuts off and the rocket then continues rising (while in free-fall). The rocket eventually stops rising and then falls back to the ground. (a) What is the highest point the rocket ...
*September 13, 2010 by Jackie*

**physics**

A roller coaster at an amusement park has a dip that bottoms out in a vertical circle of radius r. A passenger feels the seat of the car pushing upward on her with a force equal to six times her weight as she goes through the dip. If r = 20.0 m, how fast is the roller coaster ...
*October 23, 2010 by Bella*

**Physics**

A roller coaster at an amusement park has a dip that bottoms out in a vertical circle of radius r. A passenger feels the seat of the car pushing upward on her with a force equal to six times her weight as she goes through the dip. If r = 20.0 m, how fast is the roller coaster ...
*October 24, 2010 by madeline*

**college physics **

A roller coaster at an amusement park has a dip that bottoms out in a vertical circle of radius r. A passenger feels the seat of the car pushing upward on her with a force equal to twice her weight as she goes through the dip. If r = 19.0 m, how fast is the roller coaster ...
*February 12, 2012 by Anonymous*

**Physics**

A roller coaster at an amusement park has a dip that bottoms out in a vertical circle of radius r. A passenger feels the seat of the car pushing upward on her with a force equal to six times her weight as she goes through the dip. If r = 22.0 m, how fast is the roller coaster ...
*October 11, 2013 by Donna*

**physics**

You have a mass of 71 kg and are on a 51-degree slope hanging on to a cord with a breaking strength of 165 newtons. What must be the coefficient of static friction to 2 decimal places between you and the surface for you to be saved from the fire? In the previous problem if the...
*June 16, 2012 by kelly*

**Physics**

Measuring coefficients of friction. A coin is placed near one edge of a book lying on a table, and that edge of the book is lifted until the coin just slips down the incline. The angle of the incline Theta C, called the critical angle, is measured. (a) Draw a free body diagram...
*September 27, 2009 by Mandy*

**word question in algebra**

oh i think i see instead of ft/miles because i changed the 13 miles to ft it would be 0.61 ft/ft An airplane covered 13 miles of its route while decreasing its altitude by 42,000 feet. Find the slope of the airplane's line of descent. Round to the nearest hundredth. [Hint: 1 ...
*April 13, 2007 by carla*

**Applied Calculus**

A hardware store owner chooses to enclose an 800 square foot rectangular area in front of her store so that one of the sides of the store will be used as one of the four sides of the fence. If the two sides that come out from the store front cost $3 per running foot for ...
*April 8, 2012 by Trisha*

**math plz**

hi, is there an equation to finding the perpendicular bisector of a line. for example i had a line b (1,1) and c(8,1) and a was (6,5) how would i find the bisector from a going through line bc? tnx first off, the slope of a perpendicular line is -1/m (m=slope). since you can ...
*April 15, 2007 by gordain*

**Math**

you need to clean the gutters of your home. the gutters are 24 FT above the ground. for safety, the distance a ladder reaches up a wall should be four times the distance from the bottom of the ladder to the base of the side of the house. Therefore the ladder must be 6 ft from ...
*February 19, 2014 by Margaret*

**physical**

An object is thrown upward at a certain angle above the ground, eventually returning to erth.1.Is there any place along the trajectory where the velocity and acceleration are perpendicular? If so, where? 2. Is there any place where the velocity and acceleration are parallel? ...
*March 17, 2012 by badi*

**physical**

An object is thrown upward at a certain angle above the ground, eventually returning to erth.1.Is there any place along the trajectory where the velocity and acceleration are perpendicular? If so, where? 2. Is there any place where the velocity and acceleration are parallel? ...
*March 17, 2012 by badi*

**Physics Help**

A graph of wavelength vs. 1/frequency should be a straight line. What are it's slope and y-intercept? I'm not given any graphs or numbers, just this question. And I know that Velocity = frequency x wavelength And that slope is found by rise/run and m= y2-y1/x2-x1 obviously. So...
*April 3, 2014 by Eiban*

**calculus**

A rock is thrown off of a 100 foot cliff with an upward velocity of 45 m/s. As a result its height after t seconds is given by the formula: h(t)= 100+45t-5t^2 The height after 6 seconds is 190 What is the velocity after 6 seconds?
*January 25, 2013 by Anonymous*

**Calculus**

A rock is thrown off of a 100 foot cliff with an upward velocity of 45 m/s. As a result its height after t seconds is given by the formula: h(t)= 100+45t-5t^2 The height after 6 seconds is 190 What is the velocity after 6 seconds?
*January 25, 2013 by Anonymous*

**physics**

A red train traveling at 72 km/h and a green train traveling at 144 km/h are headed toward each other along a straight, level track. When they are 720 m apart, each engineer sees the other's train and applies the brakes. The brakes slow each train at the rate of 1.0 m/s2. Is ...
*September 19, 2010 by Anonymous*

**physics-2**

A tracks extends a distance of 478 km without a curve. Supposed a train with an initial speed of 72 km/h travels along the entire length of straight track with a uniform acceleration. the train reaches the end of the track in 5 h, 39 min. What is the trains final speed?
*September 16, 2009 by NoNo100*

**math**

I have a box of tiles 12" x 12" - how many tiles will I need for a 9 foot x 12 foot room?
*April 12, 2013 by Anonymous*

**Physics**

You have been asked to keep a 35.1 kilogram crate from sliding down a 50.03° incline. The coefficient of friction between the crate and the incline is 0.26, and it's on the surface of Mars (gravitational acceleration at the surface of Mars is 3.75 m/s^2). How much force must ...
*January 17, 2008 by Anon*

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