Friday

February 12, 2016
Number of results: 33,332

**Physics**

You are riding a merry-go-round on the rim which is turning counterclockwise at a constant angular speed of 0.5 rad/s.Â Your dog sees you at the 12 o'clock position when he is at the 3 o'clock position.Â He starts running counterclockwise from rest with an angular ...
*October 26, 2012 by Alphonse*

**calculus -- PLEASE HELP!**

1. There is a wall that does not need fencing [at x=0]. The curve that also does not need fencing is y=x^2/9. The fence is four units long and extends from the y axis horizontally some distance and then drops down to the curve. Find the lengths of the horizontal and vertical ...
*February 26, 2008 by anonymous*

**Physics**

A ball of mass 0.4 kg, initially at rest, is kicked directly toward a fence from a point 20 m away, as shown below. The velocity of the ball as it leaves the kicker’s foot is 16 m/s at angle of 46◦ above the horizontal. The top of the fence is 4 m high. The ball hits ...
*October 18, 2011 by Jem*

**Physics**

Sam is taking his girlfriend Sally out for a ride in his boat. He starts out at rest. He accelerates with an acceleration of 0.263 m/s^2 for 92.1 s. At that time Sally decides they are going fast enough and the boat moves at constant speed for a distance of 286 m. Then Sally ...
*October 28, 2010 by Andy*

**PHYSICS**

A particle with a mass of 2.00x10-16 kg and a charge of 22.0 nC starts from rest, is accelerated by a strong electric field, and is fired from a small source inside a region of uniform constant magnetic field 0.660 T. The velocity of the particle is perpendicular to the field...
*July 2, 2011 by jim*

**Physics Classical Mechanics**

A bead of mass m slides without friction on a vertical hoop of radius R . The bead moves under the combined action of gravity and a spring, with spring constant k , attached to the bottom of the hoop. Assume that the equilibrium (relaxed) length of the spring is R. The bead is...
*October 21, 2013 by Anonymous*

**Physics**

How many joules of energy per kilogram of rest mass are needed to bring a spacecraft from rest to a speed of 0.77c?
*September 14, 2014 by Tom*

**physics**

A 10 μC charge of mass 20 g, initially at rest at x = - 1 m in a constant electric field E = 2000 V/m is released from rest. What is its speed at x = 5 m?
*August 12, 2015 by sophie moagi*

**Physics**

A block of wood with volume V floats in water with 0.68V submerged. In oil the block floats with 0.86V of its volume submerged. What's the density of the wood?
*November 17, 2009 by Ray*

**Math**

Scott ran around his block 4 times to complete a distance of 1 mile. How many times will he need to run around his block to complete 3/4 of a mile?
*February 3, 2016 by Solange*

**physics**

a physics book is on top of a drafting table at 35 degree angle. Find the net external force acting on the book and determing wether the book move or remain at rest on this position. they give you: force of friction 11N, force normal 18N,force of gravity on the book 22N.
*January 16, 2011 by Grace*

**biology**

If a person with Down syndrome marries a person without Down syndrome, is it possible for their child not to have Down syndrome? I assume that there is a 50% chance that they could have a child that will not have down syndrome. Is this correct?
*October 30, 2013 by vanessa*

**Physics**

A 4kg block, initially moving due east at 3 m/s, is acted upon by an impulse having magnitude 8Ns and direction due west. Is the final velocity of the block 2m/s west? This is how I came to that answer: v = impluse/mass so 8/4 = 2. Although this is the change in velocity does ...
*November 10, 2009 by sarah*

**physics**

A roller coaster has a loop the loop with a loop radius of 14.5 m. What is the minimum speed that the cart must have so that unconstrained riders do not fall out when the cart is upside down at the top of the loop? What condition on the riders is met at this speed?
*November 9, 2011 by Jacky*

**physics**

a person is sled-riding down a hill that is 15.0 ft high. starting at the top with a speed of 10.0 ft/s, the sled reaches the bottom with a speed of 25.0 ft/s. (A) determine whether mechanical energy has been conserved. (B) why might mechanical energy not be conserved?
*February 28, 2012 by taylor*

**maths**

A tree stands vertically on a hill side which makes an angle of 15 degree with the horizontal. From a point on the ground 35 meter down the hill from the base of the tree, the angle of elevation of the top of the tree is 60 degree. find the height of the tree.
*September 16, 2012 by Geeta negi*

**physics**

A person lifts a 5.5 kg cement block a vertical distance 1.1 m and then carries the block horizontally a distance 7.3 m. Determine the work done by the person and by the force of gravity in this process. J (by person) J (by force of gravity)
*January 3, 2011 by Anonymous*

**French**

does "rester debout" mean to remain standing? if so, could i say I was very embarrassed because i remained standing while the rest of the class sat down : j'ai été très gêné parce que tout le monde dans la classe s'est assis mais je suis resté debout
*February 9, 2010 by sammi*

**math,help**

can someone show me these steps with the division like 2 --- 1 which would mean half. the following though. so i can see it. Simplify 3 --- + 1 x-5 ----------- 1 - (4)/(x-5) Get least common denominator. For top part, the LCD is x-5. So the 1 becomes (x-5)/(x-5). Thus the top ...
*March 14, 2007 by jasort20*

**physics**

When a jet lands on an aircraft carrier, a hook on the tail of the plane grabs a wire that quickly brings the plane to a halt before it overshoots the deck. In a typical landing, a jet touching down at 240 km/h is stopped in a distance of 95 m. What is the magnitude of the jet...
*October 16, 2014 by Anonymous*

**math**

Vlad purchased some furniture for his apartment. The total cost was $ 2943.37. He paid $ 850 down and financed the rest for 18 months. At the end of the finance period .Vlad owed 4 2147.28 . What annual interest rate, compounded monthly , was he being charged ? Round your ...
*January 18, 2012 by Annie*

**math**

Vlad purchased some furniture for his apartment. The total cost was $ 2943.37. He paid $ 850 down and financed the rest for 18 months. At the end of the finance period .Vlad owed $ 2147.28 . What annual interest rate, compounded monthly , was he being charged ? Round your ...
*January 18, 2012 by Emma*

**physics**

Stone is dropped frm rest,frm point A on a cliff,it falls 64,8m to point C,B is a point one quarter of the way down.calculate the time the stone takes to fall frm A to C.
*November 24, 2011 by Anonymous*

**Chemistry**

Calculate the number of joules required to melt 57.4g of benzene at 5.5 degrees celsius? The heat of fusion for benzene is 9.87 KJ/mol and specific heat for liquid benzene is 1.63 J/g*deg)
*February 19, 2010 by Jake*

**trigonometry **

an example problem showed the following log tan A/2 = 9.54435 - 10 A= 38 deg 36' 12" Now i want to do the same. log tan A/2 = 9.85551 - 10 A= ?? I don't know how to convert tan into degrees can you help me.
*February 27, 2011 by Anon*

**math**

A point is directly below a window. Another point B is 15 m from A and at the same horizontal level. From B angle elevation of the top of the bottom of the window is 300 and the angle elevation of the top of the widow is 350. Calculate the vertical distance. (a) From A to the ...
*February 8, 2015 by kudu*

**trigonometry??**

Did I do this right???? Express the following in degrees,minutes, and seconds: a.4 --> (180/pi)*4 = 229.18312 b.0.23 --> (180/pi)*0.23 = 13.17803 c.pi(3.14159)/6 --> (180/pi)*(pi*3.14156/6) = 94.24778 d.3*pi/2 --> (180/pi)*(3pi/2) = 270 e.-1.4 --> (180/pi)*-1.4...
*January 26, 2011 by Anon*

**college chem**

In this experiment a hot metal block at 100oC is added to cold water in a calorimeter. The heat lost by the metal block equals the heat gained by the water and the two end up at the same temperature. In one experiment, the mass of the metal block is 89.5 grams, the volume of ...
*October 8, 2009 by Sarah*

**chemistry**

Find the false statement(s) about the thermochemistry experiment in which nitric acid is reacted with sodium hydroxide, and the enthalpy of the reaction is measured using an ice calorimeter. i. Regardless of which strong acid and strong base are used for the neutralization ...
*November 16, 2008 by Anonymous*

**grade 9 math**

Trapezoid ABCD, top AD and bottom BC are parallel. AD is the smaller of the two parallel lines. Left AB is 45, bottom BC is 60, right CD is 30, top AD is unknown. Trapezoid EFGH is similar to ABCD, top EH and bottom FG are parallel. EH is the smaller of the two parallel lines...
*December 12, 2010 by olav*

**math**

there was a problem on the test 89__89 with a line on top of both numbers and there was one like this also 94___95 with a line on top of the 95. I am not sure if i need to round
*April 10, 2013 by Anonymous*

**trig**

The angle of depression of the top and bottom of a tower as seen from the top of a 100m high cliff are 30degree and 60degree respectively. find the height of the tower
*December 28, 2013 by Arun *

**physics**

A particle A of mass 2kg lies on the edge of a table of height 1m. It is connected by a light inelastic string of length 0.7m to a second particle B of mass 3 kg which is lying on table 0.25m from the edge. If A is pushed gently so that it starts falling from table then, find ...
*October 25, 2011 by Prabhjot*

**math**

When a person is swinging the amplitude (the swings"s distance above it's rest position) increases with each pump. According to Scientific magazine the amplitude increases by adding a constant when the person pumps sitting down, and by multiplying by a constant when the person...
*April 27, 2012 by John*

**Physics :)**

A block of iron at 39.0°C has mass 2.30 kg. If 3.50×104 J of heat are transferred to the block, what is its resulting temperature? The specific heat of iron is 449 (J/kg*K) Someone else had this question on here but I cannot get the right answer from the explanation given. Can...
*June 20, 2012 by Taylor*

**physics**

A horizontal spring with k = 110 N/m has one end attached to the wall. A 290 g block is pushed onto the free end, compressing the spring by 0.160 m . The block is then released, and the spring launches it outward. Neglecting friction, what's its speed when it leaves the spring...
*February 9, 2016 by holly*

**Physics Fluids**

When a block of volume 1.00 × 10–3 m3 is hung from a spring scale, the scale reads 10.0 N. When the same block is then placed in an unknown liquid, it floats with 2/3 of its volume submerged. The density of water is 1.00 × 103 kg/m^3. Determine the density of the unknown liquid.
*April 6, 2015 by Drew*

**Trigonometry **

A climber, working his way up a vertical cliff stops for a rest on the ledge. The ledge where he stopped is 12 meters wude. The angle of depression from the edge of the ledge to the bottom of the cliff is 72 degree and the angle of elevation to the top of the cliff is 88 ...
*December 10, 2011 by Tomina*

**math**

A fireman stood on the middle step of a ladder, shooting water into a burning building . As the smoke lessened, he climbed up three steps and continued his work. the fire got worse,so he had to go down five steps. Later he climbed up the last six steps and was at the top of ...
*December 3, 2009 by tao*

**Physics**

Car A travelling at 13 m/s [N] is 190m behind car B which is travelling at 9.0 m/s [N]. At this moment car A starts to accelerate at 6.0 m/s^2 [N] to catch up with car B. After 1.0s, car B also starts to accelerate at 2 m/s^2 [N]. How long will it take car A to catch up with ...
*January 23, 2016 by jerry*

**math**

For 4.95 seconds , a particle moves in a straight line according to the position function: s(t) = e^t(5-t)-5 . a. when id the particle at rest ? when is particle moving forward ? b. Find the total distance traveled by the particle in intervals [0,1] seconds and [1,2] seconds...
*November 7, 2013 by Anonymous*

**math**

For 4.95 seconds , a particle moves in a straight line according to the position function: s(t) = e^t(5-t)-5 . a. when id the particle at rest ? when is particle moving forward ? b. Find the total distance traveled by the particle in intervals [0,1] seconds and [1,2] seconds...
*November 7, 2013 by Anonymous*

**physics 11**

A 1200 kg car on a horizontal surface starts from rest and accelerates uniformly to 72 km/h in 20.0 s. Friction exets an average force of 450 N on the car during this time. a) what is the net work done on the car b) how far does the car move during this acceleration c) what is...
*September 27, 2011 by janeae*

**Science**

An artillery shell is fired with a minimal velocity of 400 m/s at 54 deg above the horizontal. To clear an avalanche, it explodes on a mountain side 40 s after firing. What is the X-coordinate relative to it's firing point? What is the Y-coordinate?
*February 25, 2011 by Christian*

**Physics**

A 20 kg wagon is pulled along the level ground by a rope inclined at 30 deg above horizontal. A frictional force of 30 N opposes the motion, how large is the pulling force if the wagon is moving at constant velocity?
*August 22, 2014 by JOSH*

**Physics**

A 20 kg wagon is pulled along the level ground by a rope inclined at 30 deg above horizontal. A frictional force of 30 N opposes the motion, how large is the pulling force if the wagon is moving at constant velocity?
*August 22, 2014 by YESHA*

**PHYSICS**

A 20 kg wagon is pulled along the level ground by a rope inclined at 30 deg above horizontal. A frictional force of 30 N opposes the motion, how large is the pulling force if the wagon is moving at constant velocity.
*August 23, 2014 by Mae*

**Physics**

A car and a truck starts from rest at the same instant, with the car initially at some distant behind the truck. The truck has a constant acceleration of 2.1 m/s^2, and the car at 3.4 m/s^2. The car overtakes the ruck after it has moved 40.0 m. a) how much time does it take ...
*December 14, 2015 by April Catubig*

**physics **

A ball is dropped from rest at the top of a 5.89-m-tall building, falls straight downward, collides inelastically with the ground, and bounces back. The ball loses 5.34% of its kinetic energy every time it collides with the ground. How many bounces can the ball make and still ...
*October 12, 2014 by S*

**physics**

1.If a block weighs 30 pounds and has a static friction of .7 and a sliding friction of .55 and Fn=Fw a. How much force must be applied to just cause motion? b. Once motion has begun what force must be maintained to cause constant velocity motion? 2.A plank is tilted slowly to...
*January 26, 2008 by Charles*

**physics**

A bungee jumper with mass 69.5 kg jumps from a high bridge. After reaching his lowest point, he oscillates up and down, hitting a low point eight more times in 36.6 s. He finally comes to rest 24.3 m below the level of the bridge. Calculate the spring constant of the bungee ...
*November 25, 2008 by Sandhya*

**Physics**

A bungee jumper with mass 69.7 kg jumps from a high bridge. After reaching his lowest point, he oscillates up and down, hitting a low point eight more times in 39.0 s. He finally comes to rest 25.0 m below the level of the bridge. Calculate the spring constant of the bungee ...
*February 24, 2013 by Bob*

**physics**

a block of mass 2 kg and block B of mass 8 kg are connected by a spring of spring constant 80 N/m and negligible mass. The system is being pulled to the right across a horizontal frictionless surface by a horizontal force 4 N with both blocks experiencing equal constant ...
*June 9, 2008 by shelly*

**Physics**

A bath toy is floating stationary in water such that half of the toy is above water and half of the toy is below the water. A kid pulls the toy 3.9 cm down into the water and then lets go. The toy then proceeds to bob up and down. It bobs up and down 26 times in a minute. NOTE...
*January 10, 2015 by Anonymous*

**Pre-Calculus**

1.The angle of elevation to top of a building from a point on the ground 20degrees and the angle of elevation from a point to 25 feet farther away is 12degrees. Find the height of the building. 2.From a point on the ground, the angle of elevation to the top of a 60-ft radio ...
*January 13, 2011 by Jay*

**Physics Intro **

A roller coaster has a vertical drop of height 66 m and then is followed by a oop. It starts as a steep slope 75 degrees to the horizontal and then enters into a circular path of radius R. In order to stay below 4 tims the force of gravity at the bottom of the bend, what is ...
*November 12, 2012 by Physics Help Please*

**science**

Which of the following examples does not demonstrate a change in velocity? An elevator slows down in order to stop at the top floor ← A cruise ship travels west at a constant speed A soccer ball is passed across the field or ← A train remains at a constant speed ...
*April 4, 2014 by steve*

**physics 204**

1.If a block weighs 30 pounds and has a static friction of .7 and a sliding friction of .55. a. How much force must be applied to just cause motion? b. Once motion has begun what force must be maintained to cause constant velocity motion? 2.A plank is tilted slowly to an angle...
*January 26, 2008 by Charles*

**perimeter and area**

the area of the jazzy juicers box top is 56 square centimeters. the box top is 7 centimeters long. How wide is it? what is the box top's perimeter?
*January 26, 2016 by a*

**Physics (please help)**

An astronaut is performing a space walk outside the International Space Station. The total mass of astronaut with her space suit and all lher gear is 127 kg. A small leak develps in her pulsion system and 5.84 g of gas are ejected each second into space with a speed of 754 m/s...
*March 3, 2011 by Abigail*

**Physics (please help!!!!)**

An astronaut is performing a space walk outside the International Space Station. The total mass of astronaut with her space suit and all lher gear is 127 kg. A small leak develps in her pulsion system and 5.84 g of gas are ejected each second into space with a speed of 754 m/s...
*March 3, 2011 by Abigail*

**physics**

1) Suppose that a runner on a straight track covers a distance of 1 mile in exactly 4min. what was its average velocity in (i) mih-1 (iii) cms-1 (ii) fts-1 (iv) kmh-1 2) A bullet of mass 10g traveling horizontal at a speed of 100 ms-1 embeds itself in a block of woods mass ...
*July 25, 2008 by matrixxavier*

**Math-How do I do this problem?**

An inverted conical tank (with vertex down) is 14 feet across the top and 24 feet deep. If water is flowing in at a rate of 12 ft3/min, find the rate of change of the depth of the water when the water is 10 feet deep.
*December 21, 2014 by Mark*

**Math help, Please**

An inverted conical tank (with vertex down) is 14 feet across the top and 24 feet deep. If water is flowing in at a rate of 12 ft3/min, find the rate of change of the depth of the water when the water is 10 feet deep.
*December 29, 2014 by Olivia*

**physics**

A motor cyclist travelling at 12m/s decelerates at 3m/s^2. (a)How long does he take to come to rest? (b)How far does he travel in coming to rest?
*December 9, 2011 by sim*

**Physics**

A 3.0 kg rock is initially at rest at the top of a cliff. Assuming the rock falls into the sea at the foot of the cliff and that its kinetic energy is transferred entirely to the water, how high is the cliff if the temperature of 1.0 kg of water is raised 0.10 degree celsius. ...
*April 2, 2008 by Jim*

**Biology **

Down syndrome or trisomy 21, in humans is caused by an extra copy of relatively small chromosome 21. if a male with down syndrome could have children what is the likelihood that his children will also have down syndrome? a. 0 b. 25 c.50 d. 75 e. 100
*September 3, 2012 by Erin*

**Physics II**

A teacher of 75.0 kg bungee-jumps (steps from rest) from a 100 m tower towards a river. The cord can stretch 40.0% of its unstrecthed length and has a breaking strength of 5000. N (if tension is greater than this, it snaps). The cord stretches .250 meters when a 10.0 kg weight...
*September 17, 2012 by Jacob*

**pysics**

Find the velocity of (a) a cylinder and (b) a ring at the bottom of an inclined plane that is 1.55 m high. The cylinder and ring start from rest and roll down the plane. Hint: Carry out the calculation including the unknown parameters, and they may cancel out.
*October 29, 2012 by Demis*

**physics**

Find the velocity of (a) a cylinder and (b) a ring at the bottom of an inclined plane that is 1.55 m high. The cylinder and ring start from rest and roll down the plane. Hint: Carry out the calculation including the unknown parameters, and they may cancel out.
*October 29, 2012 by Demis*

**Statistics**

Two groups of climbers (team A and Team B) attempt to climb Mount everest using different routes. The probability of Team A reaching the summit is .70, The probability of Team B reaching the summit is .85. A. Sue calculated the probability the both teams reach the top in the ...
*April 27, 2014 by Mark*

**AP Physics**

I need someone to review the following questions for my summer assignment and tell me if my answers are right or wrong. Please do it carefully, and the problems I found to be the most trickiest were #2 and #5. (This is is AP physics) #1 In a pickup football game, a receiver ...
*August 27, 2013 by scrupulous *

**MACROeconomics - Game Theory**

I don’t get anything from below except for (c). Please help me! Thanks. Consider the following game matrix: ....................................................Player B............ ............................................Left............Right....... Player A.........Top...
*November 24, 2009 by Anonymous*

**physics**

Part 1 A 15.6 kg block is dragged over a rough, hor- izontal surface by a constant force of 72.2 N acting at an angle of angle 34.8 above the horizontal. The block is displaced 24.6 m and the coefficient of kinetic friction is 0.234. Find the work done by the 72.2 N force. ...
*February 25, 2011 by erika*

**physics**

A 1-m-tall barrel is closed on top except for a thin pipe extending 5 m up from the top. When the barrel is filled with water up to the base of the pipe ( 1 m deep ). The water pressure on the bottom of the barrel is 10 kPa. What is the pressure on the bottom when water is ...
*February 10, 2013 by jay*

**physics**

A 1-m-tall barrel is closed on top except for a thin pipe extending 5.2m up from the top. When the barrel is filled with water up to the base of the pipe (1 m deep) the water pressure on the bottom of the barrel is 10 kPa. What is the pressure on the bottom when water is added...
*February 26, 2015 by zack*

**Physics**

A 1-m-tall barrel is closed on top except for a thin pipe extending 6.0 m up from the top. When the barrel is filled with water up to the base of the pipe (1 m deep) the water pressure on the bottom of the barrel is 10 kPa. What is the pressure on the bottom when water is ...
*November 6, 2015 by Cynthia*

**algebra**

The diagram shows a cologne bottle that consists of a cylindrical base and a hemispherical top. write an expression for cylinders volume and hemispherical top. h= 10cm; r=5cm
*August 30, 2010 by Anonymous*

**math**

This circle represents the top of a circular table that will sit in the middle of the kitchen. Hugo will replace the top of it with a piece of marble.Each inch is equal to 91 cm. What is the radius of the table?
*December 30, 2011 by Anonymous*

**maths**

from a point on the ground the angle of elevation of the bottom and top of a flagstaff situated on top of a 120 m tall house is 30 and 45 degrees respectively.find the height of the flagstaff.
*December 27, 2012 by nimisha*

**physics**

At t= 0, a particle starts from rest at x= 0, y= 0, and moves in the xy plane with an acceleration ->a (vector) = (4.0ihat+ 3.0jhat)m/s^2. Assume t is in seconds. Determine the x component of velocity as a function of time t. Determine the y component of velocity as a ...
*September 13, 2009 by Physics*

**trig**

A bird at the top of a tree looks down at a field mouse with an angle of depression of 65 degrees. If the field mouse is 30 meters from the base of the tree, find the distance from which the field mouse to the bird's eyes. Round the answer to the nearest tenth.
*July 22, 2013 by Jackie*

**physics**

A ball is rolled up a ramp at 2.50 m/s. The ball slows down for 5.00 s and then rolls back down. Assume frictions isn't a factor and that the up ramp is the positive. At what point does the ball's acceleration change and what is the acceleration on the way down?
*October 30, 2014 by joe*

**physics**

Two blocks of masses M and 3M are placed on a horizontal, frictionless surface. A light spring is attached to one of them, and the blocks are pushed together with the spring between them. A cord initially holding the blocks together is burned; after this the block of mass 3M ...
*October 31, 2009 by Anonymous*

**Calc help - check rest of answers, please?**

4. Find the tangent line approximation, L(x), of f(x)=x^2/3 at x = 8. L(x) = 4/3x-20/3 L(x) = 2/3x+8 L(x) = 4(x-8) L(x) = 1/3x + 4/3 *L(x) = 4/3x - 8/3 5. A balloon is rising at a constant speed of 5 ft/sec. A boy is cycling along a straight road at a constant speed of 15 ft/...
*December 19, 2013 by Samantha*

**physics**

The engine weighs 4500 newtons and it is lifted 1.5 meters up by the block and tackle system. To accomplish this, the mechanic must apply a force of 225 newtons while pulling a total of 37.5 meters of chain through the block and tackle pulley system What is the work done by ...
*May 18, 2011 by Anonymous*

**Physics**

A 45 kg cart is pushed up a ramp a length of 5.8 m from rest, attaining a speed of 2.6 m/s at the top of the ramp, which is 1.7 m high. The coefficient of friction between the cart and the ramp is 0.13. a) Determine the work done against: 1) gravity 2) inertia 3) friction. b) ...
*June 24, 2015 by jdemxkslwid*

**physics**

A 27.0 kg block at rest on a horizontal frictionless air track is connected to the wall via a spring. The equilibrium position of the mass is defined to be at x=0. Somebody pushes the mass to the position x= 0.350 m, then lets go. The mass undergoes simple harmonic motion with...
*November 27, 2009 by AK*

**Physics**

A glider (mass = 0.12kg ) on a frictionless horizontal air track is connected by a light string over a pulley to a metal block (mass = 0.13kg ) hanging vertically (see figure below). The objects are released from rest and move 0.44 m . a)Find the objects' acceleration. b)Find ...
*October 12, 2011 by Eman*

**physics**

The hero pursues the villain up to the top of a bungee jumping apparatus. The villain appears trapped but to create a diversion she drops a bottle. The hero quickly straps on the bungee cord to his leg and dives straight down to grab the bottle while its still in the air. ...
*November 18, 2011 by Jack*

**Grammar**

IN the following sentence what words are the adverbs? "Up went the curtain and down went our spirits." I would choose Up and Down, only I thought they were prepositions? Now I am confused. thanks Pegg You chose correctly. In this case up and down are adverbs because they ...
*March 15, 2007 by Pegg*

**physics!!**

A skateboarder, starting from rest, rolls down a 14.0-m ramp. When she arrives at the bottom of the ramp her speed is 7.40 m/s. (a) Determine the magnitude of her acceleration, assumed to be constant. (b) If the ramp is inclined at 20.5° with respect to the ground, what is the...
*October 5, 2010 by michelle*

**physics**

wheel is spinning with angular speed 8.6 radian/sec.small fractional force on shaft causes a constant angular deacceleration and wheel come to rest in 192 sec.what is angular acceleration and total angle turned during the slow down
*October 31, 2014 by ali*

**chemistry**

A block of copper of unknown mass has an initial temperature of 66.7 ∘ C . The copper is immersed in a beaker containing 95.5g of water at 20.6 ∘ C . When the two substances reach thermal equilibrium, the final temperature is 26.0 ∘ C .What is the mass of the...
*July 2, 2014 by k*

**Math 12**

A hard rubber ball is dropped from a moving van with a height of 5 metres. The ball rises to 80% of the previous height after each bounce. a) determine the total vertical distance the ball has traveled when it strikes the ground the eighth time. b) estimate the total vertical ...
*May 11, 2012 by Steven*

**Honors Physics **

A lumberjack (mass = 98 kg) is standing at rest on one end of a floating log (mass = 290 kg) that is also at rest. The lumberjack runs to the other end of the log, attaining a velocity of +3.1 m/s relative to the shore, and then hops onto an identical floating log that is ...
*February 22, 2012 by Elizabeth *

**math**

vlad purchased some furniture for his apartment. The total cost was $2942.37. He paid $850 down and financed the rest for 18 months. At the end of the finance period. Vlad owed 2147.48. What annual interest rate compounded monthly eas he being charged? round your answers to ...
*June 10, 2013 by justin*

**physics**

Two cars cover the same distance in a straight line. Car A covers the distance at a constant velocity. Car B starts from rest and maintains a constant acceleration. Both cars cover a distance of 487 m in 216 s. Assume that they are moving in the +x direction. Determine (a) the...
*January 20, 2012 by Natasha*

**Physics**

Two cars cover the same distance in a straight line. Car A covers the distance at a constant velocity. Car B starts from rest and maintains a constant acceleration. Both cars cover a distance of 515 m in 229 s. Assume that they are moving in the +x direction. Determine (a) ...
*September 16, 2014 by Dakkota*

**math**

A fireman stood on the mioddle step of a ladder, shooting water into a burning building . As the smoke lessened, he climbed up three steps and continued his work. the fire got worse,so he had to go down five steps. Later he climbed up the last six steps and was at the top of ...
*December 3, 2009 by kelvin*