Saturday

August 30, 2014

August 30, 2014

Number of results: 50,927

**Physics**

Batman (mass = 90 kg) jumps straight down from a bridge into a boat (mass = 530 kg) in which a criminal is fleeing. The velocity of the boat is initially +20 m/s. What is the velocity of the boat after Batman lands in it?
*February 25, 2008 by Zach*

**Physics**

Batman (mass = 95 kg) jumps straight down from a bridge into a boat (mass = 560 kg) in which a criminal is fleeing. The velocity of the boat is initially +10 m/s. What is the velocity of the boat after Batman lands in it?
*October 28, 2009 by Kayla V*

**Physics**

Batman (mass = m kS) jumps straight down from a bridge into a boat (mass - 510kS) in which a criminal is fleeing. The velocity of the boat is initially + 11 m/s. What is the velocity of the boat after Batman lands in it?
*October 25, 2011 by Anonymous*

**Physics(Please help)**

1) A man (mass = 80.9 kg) jumps straight down from a bridge into a boat (mass = 482 kg) in which a criminal is fleeing. The velocity of the boat is initially +14.5 m/s. What is the velocity of the boat after the man lands in it? would I subtract the two masses and then ...
*June 3, 2012 by Hannah*

**physics**

A 160 kg child jumps at 7 m/s into a boat floating a rest. After the jump, they both move at 3 m/s forward. Find the boat's mass.
*November 14, 2013 by John *

**physics**

A 300kg motorboat is turned off as it approaches a dock and it coasts in toward the dock at .5 m/s. Isaac, whose mass is 62kg, jumps off the front of the boat with a speed of 3m/s relative to the boat. what is the velocity of the boat after Isaac jumps?
*July 19, 2010 by Anonymous*

**physics**

A 300kg motorboat is turned off as it approaches a dock and it coasts in toward the dock at .5 m/s. Isaac, whose mass is 62kg, jumps off the front of the boat with a speed of 3m/s relative to the boat. what is the velocity of the boat after Isaac jumps?
*July 21, 2010 by Anonymous*

**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**

From a cliff that is 8.2 m above a lake, a young woman (mass 42 kg) jumps from rest, straight down into the water. At the instant she strikes the water, what is her de Broglie wavelength?
*April 23, 2012 by Alisha*

**physics**

From a cliff that is 8.9 m above a lake, a young woman (mass 44 kg) jumps from rest, straight down into the water. At the instant she strikes the water, what is her de Broglie wavelength?
*April 11, 2013 by PLEASE AND THANK YOU*

**physics**

A bungee jumper with mass 63.5 kg jumps from a high bridge. After reaching his lowest point, he oscillates up and down, hitting a low point eight more times in 40.0 s. He finally comes to rest 28.5 m below the level of the bridge. Calculate the spring stiffness constant AND ...
*April 19, 2010 by Anonymous*

**physics**

A bungee jumper with mass 63.5 kg jumps from a high bridge. After reaching his lowest point, he oscillates up and down, hitting a low point eight more times in 40.0 s. He finally comes to rest 28.5 m below the level of the bridge. Calculate the spring stiffness constant AND ...
*April 20, 2010 by Anonymous*

**physics**

A man is in a boat out away from shore. Th mass of the man, the boat and everything in it is 210 kg. The boat is not moving. The man throws and anchor with a mass of 26 kg straight out from the boat with a speed of 6.6 m/s. What is the resulting speed of the boat?
*February 9, 2014 by jim*

**Physics**

A bungee jumper with mass 61.3 kg jumps from a high bridge. After reaching his lowest point, he oscillates up and down, hitting a low point eight more times in 31.8 s. He finally comes to rest 25.3 m below the level of the bridge. Calculate the spring constant of the bungee ...
*November 27, 2011 by Maggie*

**physics help please!!!**

A bungee jumper with mass 63.5 kg jumps from a high bridge. After reaching his lowest point, he oscillates up and down, hitting a low point eight more times in 40.0 s. He finally comes to rest 28.5 m below the level of the bridge. Calculate the spring stiffness constant AND ...
*April 26, 2010 by Anonymous*

**physics**

You own a yacht which is 14.5 meters long. It is motoring down a canal at 9.80 m/s. Its bow (the front of the boat) is just about to begin passing underneath a bridge that is 30.0 m across. How much time is required until its stern (the end of the boat) is no longer under the ...
*November 29, 2010 by Thomas*

**physic**

You own a yacht which is 14.5 meters long. It is motoring down a canal at 10.1 m/s. Its bow (the front of the boat) is just about to begin passing underneath a bridge that is 30.0 m across. How much time is required until its stern (the end of the boat) is no longer under the ...
*June 7, 2011 by coolstir*

**physics**

A key falls from a bridge that is 45 m above the water. The key falls straight down and lands in a model boat traveling at a constant velocity of 3.5 m/s. Calculate the distance the boat was from the point of impact when the key was released. Answer d= 10.6 m
*November 11, 2012 by H*

**physics**

a boat of mass 90 kg is floating in still water a body of mass 30 kg walks from the stern to the boat the length of the boat is 3m. calculate the distance through which the boat move.
*December 12, 2012 by sony*

**physics**

A bungee jumper jumps from a bridge with a 3 m long bungee cord. Once the cord starts to stretch, it acts like an ideal spring with coefficient of elasticity k=100 N/m. What should be the minimum height of the bridge in m so that this jump is safe for the jumper? Details and ...
*July 23, 2013 by Steven*

**AYUDA**

a bungee jumper whit mass 65. kg jumps from a high bridge. after reaching his lowest point. he oscillates ud a down, hitting a low point eight more times in 38.0 s. he finally comes to rest 25.0 m below the level of the bridge. calculate the spring stiffness constant and the ...
*June 10, 2011 by Diego*

**math**

There are 3 speedboats travelling down a straight river that runs North - South between two bridges which are 325 miles apart. The red speedboat starts at the North bridge and travels South at a spped of 150mph. The blue speedboat starts at the South bridge and travels north ...
*December 6, 2009 by Anonymous*

**physics**

A boat of mass 120 kg floats in a stream. You push on the boat with a pole, exerting a force of (175 i hat - 145 j hat) N. The boat moves through a displacement dvec = (23.0 i hat - 8.0 j hat) m along a straight line.
*October 11, 2013 by Larry*

**physics**

Two people, one of mass 85 kg and the other of mass 50 kg, sit in a rowboat of mass 90 kg. With the boat initially at rest, the two people, who have been sitting at opposite ends of the boat, 3.5 m apart from each other, now exchange seats. How far does the boat move?
*May 19, 2011 by homcahbiec*

**Physics**

A boater wants to head straight across a river that has a current of 3km/hr. If the top speed of the boat in still water is 4km/hr, find the direction the boat must travel into the current to go straight across the river. How fast is the boat going straight across the river?
*October 6, 2012 by Megan*

**Business Math**

Can someone please check over my answers? I'm not sure about them, especially part c. A small boat can be bought for $3,000 cash or on the installment plan by paying $300 down and $108 a month for 30 months. a) What is the installment price of the boat? $3,540 b) What is the ...
*January 14, 2008 by Tracy*

**physics**

An 800 kg police boat slows down uniformly from 50 km/h [E] to 20 km/h [E] as it enters a harbour. If the boat slows down over a 30 m distance, what is the force of friction on the boat? (Hint: You will need to convert the velocities into m/s.)
*July 15, 2014 by alisha*

**Physics**

James Bond is trying to jump from a bridge and land on the first car of a moving train that is going to pass under the bridge. The train moves at 85 km/h and the vertical height between the bridge and the top of the carriage is 15 m. if Bond gets a running start of 4.2 m/s ...
*March 11, 2013 by Eduardo*

**physics**

James Bond is trying to jump from a bridge and land on the first car of a moving train that is going to pass under the bridge. The train moves at 85 km/h and the vertical height between the bridge and the top of the carriage is 15 m. if Bond gets a running start of 4.2 m/s ...
*March 11, 2013 by Eduardo*

**physics**

A child in a boat throws a 5.15-kg package out horizontally with a speed of 10.0 m/s. The mass of the child is 24.2kg and the mass of the boat is 33.2kg . Calculate the velocity of the boat immediately after, assuming it was initially at rest.
*March 14, 2014 by Edward*

**science**

A man mass 75 kg and a boy mass 25 kg dives off the end of a boat of mass 300 kg so that their relative horizontal velocity with respect to the boat is 3 m/s. if initially the boat is at rest find its final velocity if (1) the two dive off simultaneously (2) the man dives ...
*August 30, 2013 by sjeba*

**Science**

A little aluminum boat (mass of 14.50g) has a volume of 450.00cm3. The boat is placed in a small pool of water and carefully filled with pennies. If each penny has a mass of 2.50g, how many pennies can be added to the boat before it sinks?
*October 16, 2008 by Kevin*

**physics**

If a mass attached to the center of a vertical circle swings around at a fixed speed (v) and gravity pulls straight downward, would the tensions in the rope attached to the mass be different at the top of the circle, straight down to bottom of circle, and directly straight out...
*November 22, 2009 by Maggie*

**physics**

A man of mass 70 kg and a boy of mass 30 kg dive of the end of a boat, of mass 150 kg with a horizontal velocity of 2 m/s relativeto the boat. if initially the boat is at rest, findits velocity just after (1) both the man and boy dive off simultaneously (2) the man dives of ...
*September 5, 2013 by sarsi*

**Physics**

A rock is dropped from a bridge that is 45 m above the water. It falls directly into a model boat, moving with constant velocity, that is 12 m from the point of impact when the key is released. What is the speed of the boat?
*April 22, 2013 by shy*

**Science 8 grade**

A little aluminum boat (mass of 14.50g) has a volume of 450.00cm3. The boat is placed in a small pool of water and carefully filled with pennies. If each penny has a mass of 2.50g, how many pennies can be added to the boat before it sinks?
*October 16, 2008 by Thao*

**physics**

A boy sitting in a boat at rest throws a 6.4kg object horizontally out of the boat at 10.0 m/s. The mass of the boy is 26kg and the mass of the boat is 45kg. Calculate the velocity of the boat just after the package is thrown. I used momentum before = momentum after. 6.4kg*10....
*March 18, 2011 by Mark*

**Math (last question I swear!)**

Leroy is 6.5 ft tall and standing on a bridge. He looks down with an angle of depression of 31 degrees towards a boat traveling east. He then turns around and looks down with an angle of depression of 24 degrees towards a boat traveling west. If the boats are 432 ft apart, how...
*January 16, 2014 by Cassie*

**Math (Trig.)**

A boat sailing from A to B travels in a straight line until the captain realizes he is off course. The boat is turned through an angle of 60 degrees, then travels another 10 km to B. The trip would have been 4 km shorter if the boat had gone straight from A to B. How far did ...
*March 9, 2011 by Connor*

**Physics**

A dog, with a mass of 8.0 kg, is standing on a flatboat so that he is 26.8 m from the shore. He walks 8.6 m on the boat toward the shore and then stops. The boat has a mass of 36.0 kg. Assuming there is no friction between the boat and the water, how far is the dog from the ...
*March 27, 2012 by Julia*

**physics**

A bridge of lenght 79 m and mass 1.1 x10^5 kg is supported at each end. A truck fo mass 20900 kg is located 31 m from the left end. What is the force on the bridge at the left point of support?
*March 8, 2011 by Anonymous*

**science**

A boat of mass 40 kg is at rest; A dog of mass 4 kg moves in the boat with a velocity of 10 m/s. what is the velocity of boat? a) 4 m/s b) 2 m/s c) 8 m/s d) 1 m/s
*June 19, 2013 by raul*

**physics**

Two people, one of mass 70 and the other of mass 65 , sit in a rowboat of mass 78 . With the boat initially at rest, the two people, who have been sitting at opposite ends of the boat, 3.5 apart from each other, now exchange seats.
*February 6, 2011 by anonymous*

**physics**

If a mass attached to the center of a vertical circle swings around at a fixed speed (v) and gravity pulls straight downward, would the tensions in the rope attached to the mass be different at the top of the circle, straight down to bottom of circle, and directly straight out...
*November 21, 2009 by Josh*

**physics**

10 people,each of mass 70 kg, stand on a boat with a mass of 1000 kg. they jump off one end of the boat with velocity 1 m/s relative to the boat. the boat rolls in the opposite direction without friction. a what is the final velocity of the boat if all the people jump at the ...
*December 13, 2012 by harkaran*

**physics**

Batman, whose mass is 119 kg, is holding on to the free end of a 14.6 m rope, the other end of which is fixed to a tree limb above. He is able to get the rope in motion as only Batman knows how, eventually getting it to swing enough that he can reach a ledge when the rope ...
*February 25, 2011 by ali*

**Physics**

a man jumps off a bridge to see how high it is. he measures his time of descent. he is in the air for 3.0 s before splashing into the water below. a. How high is the bridge above the water? b. How fast is the man going as he hits the water?
*April 18, 2011 by joe*

**physics**

a man jumps off a bridge to see how high it is. he measures his time of descent. he is in the air for 3 seconds before splashing into the water below. how high is the bridge above the water?how fast is the man going as he hits the water?
*December 29, 2010 by sarah*

**SCIENCE(PHYSICS)**

a train is moving on a straight track n travels at a speed of72km/hr and passes a pole in 3 seconds. find the time taken by the train to pass the bridge of length of 540 m?
*May 27, 2011 by YASH*

**Physics**

A boat is constructed in the shape of a rectangular cube. The base of the boat is 2m by 3m and the side of the boat is 2m high. The boat has a total mass of 4500kg. Hint-The density of the water is 1000kg/m^3. a. What is the buoyant force on the boat? Explain answer. b. ...
*July 25, 2013 by Jason*

**physics**

1.A stone fired straight upwards from the top a 50m high bridge fall into water below it 12seconds later.what was its initial velocity? how high above the bridge did it go?
*February 21, 2011 by Hope katanga*

**Physics**

Two people pull as hard as they can on ropes attached to a boat of mass 200 kg. If they pull in the same direction, the boat has an acceleration of 4 m/s^2. what is the force exerted by each person on the boat? Disregard any other forces on the boat.
*September 26, 2013 by Uriah*

**Physics URGENT!!!**

Gayle runs at a speed of 9.00 m/s and dives on a sled, initially at rest on the top of a frictionless, snow-covered hill, that has a vertical drop of 20.0 m. After she has descended a vertical distance of 4.00 m, her brother, who is initially at rest, hops on her back, and ...
*October 15, 2012 by Anonymous*

**College Physics**

6. A tall bald student (height 2.1 meters and mass 93.1 kg) decides to try bungee jumping from a bridge. The bridge is 36.7 meters above the river and the "bungee" is 25.3 meters long as measured from the attachment of the bridge to the foot of the jumper. Treat the "bungee" ...
*June 29, 2011 by Jane*

**physics**

A suspension bridge is 66.0 m above the level base of a gorge. A stone is thrown or dropped from the bridge. At the location of the bridge, g has been measured to be 9.83 m/s2. In each of the following, assume that there is no air resistance. (a) If you drop the stone, how ...
*September 21, 2010 by Kacy*

**Physics**

A spaceship of mass 2.3×10^6 kg is cruising at a speed of 6.0×10^6 m/s when the antimatter reactor fails, blowing the ship into three pieces. One section, having a mass of 5.2×10^5 kg, is blown straight backward with a speed of 2.0×10^6 m/s. A second piece, with mass 8.4×10^5 ...
*November 26, 2012 by K*

**physics**

Batman is standing on top of a 201 m tall building. He kicks off the building with a horizontal velocity of 10 m/s. Joker is driving a car towards the building at 40 m/s. What is batman's velocity at the point of impact (with respect to the ground)? How far away from the ...
*October 30, 2011 by Juliet*

**physics**

A suspension bridge supported by a cable 100ft long has a sag of 10ft at its center. If the bridge has a weight of 20,000 lbs and its center of mass is the center of the bridge, what is the tension on the cable?
*January 17, 2011 by bird*

**Physics**

What force is must a jet's boat engine apply to accelerate the boat from 50 km/h to 100 km/h in 6.0 s? The mass of the boat is 800 kg and the coefficient of kinetic friction is 0.30. I found acceleration by doing v2-v1 / t, but im not sure what to do next?
*September 28, 2009 by Anonymous*

**physics**

When an open-faced boat has a mass of 5750kg, including its cargo and passengers, it floats with the water just up to the side on a freshwater lake. (a)What is the volume of this boat? (b) The captain decides that it is too dangerous and wants to throw some cargo overboard so ...
*December 8, 2009 by Sarah*

**physics**

A m = 2.51 kg mass starts from rest and slides a distance d down a frictionless theta = 34.6° incline. While sliding, it comes into contact with an unstressed spring of negligible mass. The mass slides an additional 0.220 m as it is brought momentarily to rest by compression ...
*October 31, 2009 by Anonymous*

**Physics**

A stone is thrown upward from a bridge at a speed of 10 m/s. It narrowly misses the bridge on the way back down, and hits the water at 30m/s. what is the approximate height of the bridge?
*July 8, 2014 by Anonymous*

**Math**

Jane is 2mi offshore in a boat and wishes to reach a coastal village 6mi down a straight shoreline from the point nearest the boat. She can row 2mph and can walk 5mph. Where should she land her boat to reach the village in the least amount of time? I'm totally stumped by this ...
*September 5, 2010 by Nikki*

**science**

A bungee jumper jumps (with no initial speed) from a tall bridge attached to a light elastic cord (bungee cord) of unstretched length L. The cord first straightens and then extends as the jumper falls. This prevents her from hitting the water! Suppose that the bungee cord ...
*October 22, 2013 by mechanics*

**physics ap**

Sir Lost-a-Lot dons his armor and bursts out of the castle on his trusty steed Tripper in his quest to rescue fair damsels from drag- ons. Unfortunately his valiant aide Doubtless lowered the drawbridge too far and finally stopped it 30 below the horizontal. Lost- a-Lot ...
*November 17, 2012 by helpplz*

**SCIENCE(PHYSICS)**

a train is moving on a straight track n travels at a speed of72km/hr and passes a pole in 3 seconds. find the time taken by the train to pass the bridge of length of 540 m? Sir in the solution i understood why we will get27 sec. but why we will add 3 sec?
*May 27, 2011 by YASH*

**Physics**

A 10-kg mass is projected straight up with a speed of 20.0 meter/second. 1. Find the initial kinetic energy of the mass 2. To what height does the mass rise?
*October 1, 2013 by Anonymous*

**Physics**

A power boat of mass 495 kg is cruising at a constant speed of 8.9 m/s. The propeller provides a drive force of 780 N. The driver of the boat shuts off the engine, and the boat coasts to a halt. Assume-contrary to fact-that the resistive force due to the water is constant, ...
*February 25, 2008 by John*

**Physics**

A power boat of mass 460 kg is cruising at a constant speed of 8.9 m/s. The propeller provides a drive force of 765 N. The driver of the boat shuts off the engine, and the boat coasts to a halt. Assume-contrary to fact-that the resistive force due to the water is constant, ...
*February 25, 2008 by Peter*

**physics**

A power boat of mass 465 kg is cruising at a constant speed of 8.9 m/s. The propeller provides a drive force of 765 N. The driver of the boat shuts off the engine, and the boat coasts to a halt. Assume-contrary to fact-that the resistive force due to the water is constant, ...
*October 23, 2010 by Xavier*

**Physics - Momentum**

A child in a boat throws a 5.60 kg package out horizontally with a speed of 10.0 m/s. Calculate the velocity of the boat immediately after, assuming it was initially at rest. The mass of the child is 22.0 kg and that of the boat is 55.0 kg.
*December 9, 2009 by DJ*

**Physics**

A child in a boat throws a 5.40 kg package out horizontally with a speed of 10.0 m/s, Fig. 7-31. Calculate the velocity of the boat immediately after, assuming it was initially at rest. The mass of the child is 25.0 kg and that of the boat is 40.0 kg.
*April 14, 2011 by Brittney*

**physics**

A mass of 2kg was thrown straight up with a speed of 15m/s. (a) find the initial KE (b) how high does the mass rise? (c) what is the GPE of the mass at the highest point?
*March 15, 2011 by Madi*

**Math**

A certain mass is supported by a spring so that it is at rest 0.5 m above a table top. The lowest position of the mass is 0.1 m, and the highest position is 0.9 m. The mass is pulled down 0.4 m at time =0, creating a periodic up and down motion. It takes 1.2 s for the mass to ...
*July 27, 2011 by hhfo*

**calculus**

Wiley jumps straight up in the air from the edge of a cliff so that when he comes down he falls off the cliff. The cliff is 40 feet off the ground. His height t seconds after he jumps is s= -16t2 + 12t + 40.What is the maximum height? What is his maximum velocity?
*November 12, 2012 by Martha*

**Physics**

A frog with a mass of .14kg jumps by extending its legs 13.5cm, starting from rest in a time period of 112ms. What is the acceleration of the frog while it jumps?
*September 20, 2010 by Meg*

**Science**

A child in a boat throws a 5.30 kg package out horizontally with a speed of 10 m/s, see the figure. Calculate the velocity of the boat immediately after, assuming it was initially at rest. The mass of the child is 26.0 kg and that of the boat is 55.0 kg What is the magnitude?
*October 20, 2011 by kago*

**Physics Classical Mechanics**

A bungee jumper jumps (with no initial speed) from a tall bridge attached to a light elastic cord (bungee cord) of unstretched length L. The cord first straightens and then extends as the jumper falls. This prevents her from hitting the water! Suppose that the bungee cord ...
*October 21, 2013 by Anonymous*

**Math**

A bridge over a river is supported by an arch. The function that describes the arch us h(x) = -0.0274x^2 + 1.34033x, where h(x) is the height, in metres, of the arch above the water at any distance, x, in metres, from one end of the bridge. Could a sail boat with an 18m mast ...
*June 5, 2012 by Aria*

**physics**

A child in a boat throws a 6.00 kg package out horizontally with a speed of 12.0 m/s, Fig. 7-28. Calculate the velocity of the boat immediately after, assuming it was initially at rest. The mass of the child is 25.0 kg and that of the boat is 50.0 kg. Magnitude ___m/sDirection
*March 13, 2011 by joe*

**5th grade math**

Three frogs had a race on a 1000 chart. Freaky Frog took 30 jumps of 25, Frogurt Frog took 30 jumps of 20, and Frannie Frog took 120 jumps of 5. Who was ahead?_______________________ Help! Assuming the distance of the jump is the same for each frog. 30 jumps x 25/jump = ?? 30 ...
*September 25, 2006 by Aliah*

**Physics**

A merry-go-round is a common piece of playground equipment. A 2.4 m diameter merry-go-round with a mass of 300 kg is spinning at 22 rpm. John runs tangent to the merry-go-round at 5.0 m/s, in the same direction that it is turning, and jumps onto the outer edge. John's mass is ...
*December 2, 2011 by Danny*

**physics**

An 85.0 kg fisherman decides to jump from his boat onto the dock. If the velocity of the fisherman is 4.30 m/s to the west and the boat is 185 kg, what is the velocity of the boat after the fisherman jumps out?
*December 3, 2010 by bob*

**physics**

A car traveling at 53 km/h hits a bridge abutment. A passenger in the car moves forward a distance of 65 cm (with respect to the road) while being brought to rest by an air bag. What magnitude of foce (assume constant) acts on the passengers's upper torso, which is 41 kg? I ...
*November 12, 2006 by Lars*

**Physics**

A bungee jumper of mass 60 kg jumps from a bridge tied to an elastic rope which becomes taut after he falls 10 m. Consider the jumper when he has fallen another 10 m and is travelling at 15 m/s. Work out how much energy is stored in the rope. Take g=10 m/s^2 and ignore air ...
*December 17, 2010 by anon*

**Physics**

A student drops a rock off a bridge. The rock has a mass of 5.81 kg. If the bridge is 48.7 m high, how much time does it take it to reach the water below?
*September 25, 2012 by greg*

**physics**

A power boat of mass 460 kg is cruising at a constant speed of 8.9 m/s. The propeller provides a drive force of 765 N. The driver of the boat shuts off the engine, and the boat coasts to a halt. Assume -- contrary to fact -- that the resistive force due to the water is ...
*October 2, 2009 by kp*

**chemistry**

how do i calculate %of arsenic and oygen by mass and chem composition of the oxide that has been formed 0.702 sample of arsenicheated, material in boat, oxide of arsenic with mass of 0.927g please help %As = [(mass As)/mass oxide]x100=?? %O = [(mass O)/mass oxide]x100=?? From ...
*January 30, 2007 by mickey*

**physics**

Sir Lost-a-Lot dons his armor and bursts out of the castle on his trusty steed Tripper in his quest to rescue fair damsels from dragons. Unfortunately his valiant aide Doubtless lowered the drawbridge too far and ﬁnally stopped it 28 ◦ below the horizontal. Losta-...
*January 10, 2013 by Anonymous*

**physics**

a bungee cord jumper jumps off the new river bridge. the bridge is 876 feet high. How fast is the jumper falling when he reaches 200 feet above the ground?
*May 16, 2012 by Anonymous*

**Thermodynamics**

A 12 cu.ft tank contains hydrogen sulfide gas at 150psia & 80°F after 5 pounds of the gas have been drawn out. Before any gas left the tank the temperature was 70°F. What mass of gas was in the tank originally and what pressure? just to check: R=45.2 V=12cu.ft = 20736cu.in t=...
*March 1, 2010 by Janus*

**Physical Science**

A bridge in Sweden carries the Gota Canal over a highway. What, if anything happens to the load on the bridge when a boat passes across it in the canal?
*September 18, 2011 by Jaskson*

**College Physics**

A mass of 0.4 kg, hanging from a spring with a spring constant of 80 N/m, is set into an up-and-down simple harmonic motion. What is the velocity of the mass when at its maximum displacement of 0.1 m?
*October 24, 2010 by charlie*

**science**

A ramp 20m long slopes down 1.2m to the edge of a lake. A force of 300N is needed to pull a boat on a trailer at constant speed up the ramp when they are clear of the water. If friction is negligible, what is the combined mass of the boat and trailer. Hints: Calculate MA of ...
*February 16, 2014 by Jeff*

**math (trig)**

from the top of a bridge over the burlington canal, maria looks down at a sailboat at an angle of depression 15 degrees.the bridge is 18m above the water. calculate the horizontal distance from the bridge to the sailboat
*September 14, 2010 by haley*

**physics**

a man of 50kg is standing on one end on a boat of length 25m and mass 200 kg .if he starts running and when he reaches the other end ,he has a velocity 2m/s with respect to the boat .the final velocity of the boat is?
*April 11, 2012 by srikala*

**physics**

If a boat and its riders have a mass of 800 kg and the boat drifts in at 1.5 m/s how much work does Sam do to stop it?
*May 14, 2011 by sam*

**Physics**

A speed boat at rest begins to move in a straight line from a dock. The boat has a constant acceleration of +3.0 m/s squared. Attached to the dock is a siren that is producing a 755 Hz tone. If the air temperature is 20 degrees C, what is the frequency of the sound heard by a ...
*April 15, 2010 by Lenzen*

**physics**

A 53.0-kg person jumps from rest off a 12.0-m-high tower straight down into the water. Neglect air resistance. She comes to rest 3.00 m under the surface of the water. Determine the magnitude of the average force that the water exerts on the diver. This force is nonconservative
*July 10, 2013 by sal*

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