Saturday

August 1, 2015

August 1, 2015

Number of results: 50,635

**Physics**

The horizontal surface on which the block of mass 5 kg slides is frictionless. The force of 29 N acts on the block in a horizontal direction and the force of 58 N acts on the block at an angle(top Right). What is the magnitude of the resulting acceleration of the block?
*October 9, 2014 by Isaac*

**Physics**

If the coefficient of kinetic friction between a 32.7 kg crate and the floor is 0.295, what horizontal force is required to move the crate at a steady speed across the floor? (in N) What horizontal force is required if Uk is zero? (in N)
*February 10, 2015 by Ashley*

**Chemistry**

There is a picture of a brick lying face down and one standing straight up. The question asks: Is each brick exerting the same force? Explain. I know that they are exerting the same force, but I don't understand why and how to explain it?
*March 24, 2015 by Jessica*

**trig**

Forces of 15 kg and 10 kg act on a point with an angle of 60◦ between the forces. Find the magnitude of the resultant force (to nearest tenth of a kilogram) and the angle (to the nearest degree) the resultant makes with the 15 kg force
*April 28, 2015 by syed*

**college Chemistry**

What is the mole of oxalic acid? Equation:H2C2O4 + 2NaOH---> Na2C2O4 + 2H2O *Moles of oxalic acid dihydrate is 0.032 mole. * Molarity of oxalic acid solution is 0.128 M oxalic acid solution. * Initial volume of Oxalic acid is 19.8 ml and Final volume is 23.0 ml
*December 6, 2010 by Ivy*

**chemistry**

What is partial pressure?
*March 18, 2008 by Miley*

**physical**

What is pressure point?
*February 28, 2010 by Justin*

**physics**

what is the concept of pressure
*April 15, 2013 by Anonymous*

**chemistry**

a pressure vessel
*May 31, 2013 by himani.*

**physics!! plz answer me!**

A 0.15 kg baseball moving at +26 m/s is slowed to a stop by a catcher who exerts a constant force of -390 N. How long does it take this force to stop the ball? How far does the ball travel before stopping? plz plz plz help!!
*December 10, 2007 by julia*

**Calculus**

Could someone please explain on how to do this question step-by-step. Thank you! A bolt is being loosened by a 40 cm wrench. The torque in this situation has a magnitude of 12 J and the force makes an angle of 60 degree with the wrench. What is the magnitude of the force used ...
*April 14, 2012 by Antia*

**Calculus**

Could someone please explain on how to do this question step-by-step. Thank you! A bolt is being loosened by a 40 cm wrench. The torque in this situation has a magnitude of 12 J and the force makes an angle of 60 degree with the wrench. What is the magnitude of the force used ...
*April 17, 2012 by Jake*

**Physics**

A constant force, F = (4.63, −3.79, 2.16) N, acts on an object of mass 17.7 kg, causing a displacement of that object by r = (4.10, 3.86, −2.45) m. What is the total work done by this force? Im pretty sure the work equals -k(x-xo) but im not really sure what the ...
*October 21, 2014 by Anonymous*

**calculus**

Water is being filled into a water tank at 22 liters/second. The base of the tank has dimensions w = 1 meter and L = 2 meter . What is the rate of change of the height of water in the tank? (express your answer in cm/sec).
*November 9, 2012 by kchik*

**calculus**

Water is being filled into a water tank at 22 liters/second. The base of the tank has dimensions w = 1 meter and L = 2 meter . What is the rate of change of the height of water in the tank? (express your answer in cm/sec).
*November 9, 2012 by kchik*

**Math**

A bus driver filled up 7/8 fuel tank for a trip. She used 6/7 of the fuel by the end of the trip. the capacity of her tank is 70 gallons. How much fuel did she use for the trip? Express your answer as decimal. Please help BJ Thank you
*May 11, 2015 by BJ*

**Physics**

An air-hockey puck of mass m floats across the table essentially frictionless on a cushion of air. This puck bumps nearly head-on into a second puck that has 3 times the mass, moving in the opposite direction but with the same speed, v i , as the lighter puck. Immediately ...
*August 6, 2012 by Joe*

**physics**

Your hard drive can spin up to 7500 rpm from rest in 5 s. If your hard drive's mass is 40 g and its radius is 2.5 in, what is the force applied to the drive if the force is applied at a point 0.25 in from the center? Assume the drive is a solid, uniform disk with I = (1/2)mr2...
*May 2, 2009 by seth*

**physics**

Two dogs pull horizontally on ropes attached to a post; the angle between the ropes is 65.0ú. Dog " A" exerts a force of 256 N and dog " B " exerts a force of 344 N . I) Find the magnitude of the resultant force. ( Answered = 508 N ) II) Find the angle the resultant force ...
*November 10, 2006 by kuwaiti*

**college physics**

To stretch a spring 7.00 cm from its unstretched length, 16.0 J of work must be done. What is the force constant of this spring? What magnitude force is needed to stretch the spring 7.00 cm from its unstretched length? How much work must be done to compress this spring 4.00 {\...
*September 21, 2010 by jon*

**Chemistry**

The following reaction can be used to determine the amount of calcium ion present in milk. Before the reaction below is carried out ca2+ is precipitated out of a sample of milk as CaC2O4(s). The CaC2O4(s) is then titrated with MnO4-. 2MnO4-(aq) + 5CaC2O4(s) + 16H+(aq) = 2Mn2+(...
*March 29, 2011 by John*

**Physics**

The driver accelerates a 240.0 kg snowmobile, which results in a force being exerted that speeds up the snowmobile from 6.00 m/s to 28.0 m/s over a time interval of 60.0 s. b. What is the snowmobile's change in momentum? What is the impulse on the snowmobile? c. What is the ...
*January 6, 2010 by Shawn*

**physics**

The acceleration due to gravity near a planet's surface is known to be 3.20 . Part A If the escape speed from the planet is 9.54 , determine its radius. Part B Find the mass of the planet. Part C If a probe is launched from its surface with a speed twice the escape speed and ...
*September 29, 2012 by sammy*

**college physics **

air flows through a main duct at a mass flow rate of 4kg/s the main duct enters a junction that splits into two branch ducts one with a cross section of 20cm x 30cm and one with a cross section og 40cm x 60cm if the mass flow rate in the large branch is 2.8kg/s what is the ...
*October 9, 2012 by yaritza*

**physics**

Rachel is asked to calculate the density of a liquid. She correctly measures the mass of the liquid to be 13.9 grams, but she incorrectly measures the volume of the liquid to be 8 mL. The actual volume of the liquid is 7 mL. If Rachel uses the following equation to calculate ...
*January 23, 2012 by Anonymous*

**Chemistry**

How to solve titration problem for HC2H3O2 + NaOH= NaC2H3O2 + H2O The M of NaOH= 0.427 The volume of NaOH= 17.30mL 10.00mL of acid The second titration calculation is: The M of NaOH= 0.427 The volume of NaOH=34.60mL 20.00mL of acid
*September 27, 2012 by John*

**chemistry**

How to solve titration problem for HC2H3O2 + NaOH= NaC2H3O2 + H2O The M of NaOH= 0.427 The volume of NaOH= 17.30mL 10.00mL of acid The second titration calculation is: The M of NaOH= 0.427 The volume of NaOH=34.60mL 20.00mL of acid
*September 29, 2012 by Anonymous*

**Physics**

The driver of a car on a horizontal road makes an emergency stop by applying the brakes so that all four wheels lock and skid along the road. The coefficient of kinetic friction between tires and road is 0.39. The separation between the front and rear axles is L = 4.1 m, and ...
*January 14, 2013 by zack*

**chemistry**

Liquid water has a specific heat of 4.184 J/g degrees celcius. If 50 grams of water is heated from10 to 55 degrees celcius, what is the heat energy in joules needed to heat this water
*November 5, 2012 by kiersten*

**Chemistry **

At 28.4 g sample of aluminum is heated to 39.4 degrees Celsius and then is placed in a calorimeter containing 50.0g of water. Temp of water increases from 21.00 degrees Celsius to 23.00 degrees Celsius. What is the specific heat of aluminum?
*May 7, 2015 by Tori*

**englissh**

16-20: Read the passage and answer the questions that follow on the basis of the information provided in the passage. Dynamic Link Libraries Windows provides several files called dynamic link libraries (DILLS) that contain collections of software code that perform common ...
*August 28, 2011 by avinash*

**Physics**

A pair of blocks of the mass M =30.7 kg, and 2 M are dragged over a rough, horizontal surface by two constant forces of magnitude F=98.0 N. The angle α = 22.7 ° . The blocks are displaced 7.5 m, and the coefficient of kinetic friction is 0.258. *for the normal force of ...
*October 15, 2014 by Haley*

**math**

A pair of blocks of the mass M =30.7 kg, and 2 M are dragged over a rough, horizontal surface by two constant forces of magnitude F=98.0 N. The angle α = 22.7 ° . The blocks are displaced 7.5 m, and the coefficient of kinetic friction is 0.258. *for the normal force of ...
*October 15, 2014 by Haley*

**physics**

A police offer may warn that “speed kills.” In video games, high-speed crashes are common. Suppose a particular scene in a game required the following elements: • a high performance motorcycle must crash into a barrier and be stopped • a small scooter must crash into another ...
*April 5, 2013 by alejandro*

**Chemistry**

In a previous experiment, 0.800 g of the green complex iron salt was placed in an Erlenmeyer flask and heated with concentrated sulfuric acid until all oxalate ion was destroyed (CO2, SO2 and H2O are formed). Ferric ion (Fe3+) remained in solution and was reduced to Fe2+ by ...
*May 7, 2007 by Linda*

**physics**

The information on a one-gallon paint can is that the coverage, when properly applied, is 450 ft sq. One gallon is 231 cubic inches. What is the avg. thickness of the paint in such an application? Please explain how to do this. The answer should be in inches.
*September 15, 2008 by gg*

**physics**

A girl throws a water-filled balloon at an angle of 50.0∘^\circ above the horizontal with a speed of 12.0m/s{\rm m}/{\rm s} . The horizontal component of the balloon's velocity is directed toward a car that is approaching the girl at a constant speed of 8.00m/s{\rm m}/{\...
*May 17, 2014 by joe*

**physics**

A girl throws a water-filled balloon at an angle of 50.0∘^\circ above the horizontal with a speed of 12.0m/s{\rm m}/{\rm s} . The horizontal component of the balloon's velocity is directed toward a car that is approaching the girl at a constant speed of 8.00m/s{\rm m}/{\...
*May 17, 2014 by joe*

**chemistry**

for NaTl, is the unit cell of it based on the repetition of body centered cubic and the holes in this unit cell are octahedral? how many of each of the 2 cubes drawn for NaTl are required its unit cell? is it 8?
*February 15, 2010 by eng*

**Geography**

1.Name the Canadian ports that are opened all year round. 2.Which Canadian city is the eastern most provincial capital? Plz help. THANKS. http://www.acpa-ports.net/industry/cpafacts.html http://www.travelsense.org/destinations/canadacruise.asp Read carefully! =)
*February 5, 2007 by Kate*

**Physics**

A spring has a force constant of 100N/m and an unstretched lenght of .07 m. One end is attached to a post taht is free to rotate in the center of a smooth table. The other end is attatched to a 1 kg disc moving in uniform circular motion on the table, which stretches the ...
*March 25, 2007 by Tammy*

**Chemistry**

The vapor pressure of chloroform is 173.11 mm Hg at 25 degrees celsius. A nonvolatile, nonelectrolyte that dissolves in chloroform is aspirin. Calculate the vapor pressure of the solution at 25 degrees celsius when 6.243g of aspirin (180.1g/mol) are dissolved in 244.5g of ...
*February 19, 2012 by Hannah*

**math**

You have 160 boxes of cookies. In each case you can pack 8 boxes of cookies. How many cases would be filled from these boxes of cookies? I'm not sure if i do 160*8 or what i believe its 20 instead of 1280
*March 12, 2015 by danielle*

**physics **

Planets A and B orbit the same star. Planet B is four times further from the star than planet A and has twice the mass of planet A. The gravitational force of the star on planet B is ____ the force on planet A.
*March 3, 2011 by love*

**Physics**

The force exerted by the wind on the sails of a sailboat is 310 N north. The water exerts a force of 240 N east. If the boat (including its crew) has a mass of 330 kg, what are the magnitude and direction of its acceleration? magnitude in m/s2 direction in ° north of east
*June 9, 2008 by Elisa*

**Physics**

A wood crate is sitting on a concrete floor. The crate has a mass of 7.4719x10^2 kg. The crate has an applied force in the x direction and moves with constant velocity in that direction. What is the applied force acting on the crate, to three significant figures, if ìs is 6....
*October 22, 2010 by annonomus*

**Physics**

A square, 0.69 m on a side, is mounted so that it can rotate about an axis that passes through the center of the square. This axis is perpendicular to the plane of the square. A force of 17.1 N lies in this plane and is applied to the square. What is the magnitude of the ...
*November 13, 2010 by Mike*

**Physics**

A square, 0.52 m on a side, is mounted so that it can rotate about an axis that passes through the center of the square. This axis is perpendicular to the plane of the square. A force of 15.0 N lies in this plane and is applied to the square. What is the magnitude of the ...
*November 15, 2010 by Bella*

**physics**

A square, 0.52 m on a side, is mounted so that it can rotate about an axis that passes through the center of the square. This axis is perpendicular to the plane of the square. A force of 15.0 N lies in this plane and is applied to the square. What is the magnitude of the ...
*November 15, 2010 by Bella*

**physics**

1) write the formula to find the magnitude of gravitational force between earth and an object on earth's surface 2) how does the value of gravitational force 'f'change between two objects? 3) what is direction of an object moving with an acceleration due to gravity?
*August 20, 2014 by Charika jakhar*

**Physics**

A 2.10 kg frictionless block is attached to an ideal spring with force constant 315N/m . Initially the block has velocity -3.75m/s and displacement 0.270m . Find (a) the amplitude of the motion. (b) the maximum acceleration of the block. (c) the maximum force the spring exerts...
*October 24, 2014 by chiongo*

**calculus**

The volume V of a cube with sides of length x in. is changing with respect to time. At a certain instant of time, the sides of the cube are 6 in. long and increasing at the rate of 0.3 in./sec. How fast is the volume of the cube changing at that instant of time?
*October 27, 2012 by Anonymous*

**Business studies**

List the four factorsof production and explain why each is necessary for production to take place. Land- Land is necessary because of its natural resources. labour-People are needed to do the work. capital-capital is needed to pay for production and to pay workers' salaries. ...
*January 7, 2011 by Peppermintmocha*

**Physics Help**

A crane is used to lift air conditioning units to the top of a 5-story building. Each story is 3.5 m high. The crane accelerates the units while lifting the units past the first story and then lifts them at a constant velocity past the second through fourth stories. it hen ...
*September 14, 2014 by Anonymous*

**calculus**

a spherical snowball with diameter 4 inches is removed from the freezer in June and begins melthing uniformly such that it is shrinking 2 cubic inches per minute. How fast ( in square inches per minute) is the surface area decreasing when the radius is 1 inch?
*October 18, 2007 by ssss*

**physics**

Please help me solve !!! Water flows into a swimming pool at the rate of 9.83 gal/min. If the pool dimensions are 33.4 ft wide, 44.9 ft long and 19.9 ft deep, how long does it take to fill the pool? (1 gallon = 231 cubic inches) Answer in units of min
*January 20, 2012 by Kaleigh*

**problem solving**

Suppose water flows from a shower at a rate of 0.38 cubic feet per minute. Do you use more water by taking a 14-minute shower or by filling a bathtub with 0.6 cub yards of water, and by how much? Demonstrate strep-by-step solution.
*December 8, 2012 by ben*

**physics**

2. Explain how the tension force gets transmitted along from one end of a string to the other. Does the amount of force that gets transmitted depend on how elastic or stretchable the string is? Explain.
*October 22, 2010 by brian*

**physics**

If the coefficient of kinetic friction between a 37 kg crate and the floor is 0.31, what horizontal force is required to move the crate at a steady speed across the floor? What horizontal force is required if µk is zero?
*November 14, 2010 by Hannah*

**physics**

Charlie pulls horizontally to the right on a wagon with a force of 37.2 N. Sara pulls horizontally to the left with a force of 22.4 N. How much work is done on the wagon after it has moved 2.50 meters to the right? in joules?
*March 7, 2011 by biana franz*

**physics**

if the coefficient of kinetic friction between a 35-kg crate and the floor is 0.30, what horizontal force is required to move the crate at a steady speed across the floor? what horizontal force is required uk is zero?
*July 30, 2011 by mariz*

**Physics**

Block A and Block B in the figure below are connected by a string of negligible mass. There is a force on A with a magnitude of FA=20N and a force on B with a magnitude FB=34N in the directions shown in the figure. What is the tension in the string?
*October 14, 2012 by Sam*

**physics **

ball 1 has a mass of 5kg and a ball 2 has a mass of 10kg they both are dropped off a 20m tower. the force of gravity on the first ball is F1 and the force of gravity on the second ball is F2 what is the ratio of F1 to F2
*November 24, 2012 by yocelyne t*

**General Physics 1**

A force ~F = Fx ˆý+Fy ˆ| acts on a particle that undergoes a displacement of ~s = sx ˆý + sy ˆ| where Fx = 10 N, Fy = −4 N, sx = 6 m, and sy = 1 m. 1. Find the work done by the force on the particle. Answer in units of J 2. Find the angle between ~F and ~s. Answer in ...
*July 26, 2013 by Charles*

**physics**

A 2.00 kg block is held in equilibrium on an incline of angle θ = 75° by a horizontal force applied in the direction shown in the figure below. If the coefficient of static friction between block and incline is μs = 0.300, determine the following. (a) the minimum ...
*September 29, 2012 by Anonymous*

**Math, statistics, Linear Programming**

just looking for the constraints and variables. The Nestle’ Purina PetCare Company of St. Louis, Missouri, manufactures a gourmet cat food under the Fancy Feast brand. The brand includes a number of options for choices of meats, fish, and poultry in three ounce cans. The ...
*April 16, 2011 by ralph*

**science, **

A force of 4400 N is exerted on a piston that has an area of 0.020 m2. What force is exerted on a second piston that has an area of 0.040 m2?
*July 15, 2015 by cristopher*

**physics**

A down jacket has a surface area of 0.82 m2 and is filled with a 3.8 cm thick layer of down, which has a thermal conductivity of 6.0 10-6 kcal/(s · m · C°). The coat is worn by a person whose skin temperature is maintained at 27° C. The outer surface of the coat is at -23° C. ...
*April 9, 2012 by JOHN*

**math-ish**

What words does tcnaio make unscrambled? Try these: http://www.ssynth.co.uk/~gay/anagram.html http://wordsmith.org/anagram/ http://www.unscramble.net =) action atonic tonica cation
*May 23, 2007 by Devin*

**Math **

A rectangular prism has a length of 100 cm, a height of 10 cm and a width of 5 cm. What is the volume of the rectangular prism? A. 3100 square centimeters B. 1550 square centimeters C. 5000 square centimeters D. 1200 square centimeters 2. A cylinder has a diameter of 5 meters ...
*March 7, 2012 by Adrian *

**chemistry**

Enormous numbers of microwave photons are needed to warm macroscopic samples of matter. A portion of soup containing 177 g of water is heated in a microwave oven from 20degrees Celsius to 98 degrees Celsius, with readiation of wavelength 1.55x10^-2m. How many photons are ...
*October 13, 2008 by kelsie*

**Chemistry**

consider 2 sample of nitrogen gas. sample 1 contains 1.5 mol of N2 and has a volume of 36.7L at 25C and 1 atm. sample 2 has a volume of 16.5L at 25C and 1 atm. calculate the number of moles of N2 in sample 2 do i use the pv= nrt equation? and do i only use the information ...
*June 8, 2010 by Anonymous*

**Physics**

In order to handle a hot pizza of mass 1.0 kg, a cook slides a light (i.e., of negligible mass) but stiff spatula of length 2.0 m from the right hand to the center of the pizza, which he then carries horizontally with both hands. His right hand is at one end of the pole (point...
*March 30, 2009 by Mary*

**College Physics **

Two forces, F⃗ 1 and F⃗ 2, act at a point, as shown in the picture. (Figure 1) F⃗ 1 has a magnitude of 8.20N and is directed at an angle of α = 55.0∘ above the negative x axis in the second quadrant. F⃗ 2 has a magnitude of 6.40N and is ...
*April 5, 2014 by Danilo*

**Chemistry**

What is the mole of oxalic acid? Equation:H2C2O4 + 2NaOH---> Na2C2O4 + 2H2O *Moles of oxalic acid dihydrate is 0.032 mole. * Molarity of oxalic acid solution is 0.128 M oxalic acid solution. * Initial volume of Oxalic acid is 19.8 ml and Final volume is 23.0 ml
*December 7, 2010 by Ivy*

**Geography**

I am working on my take home quiz questions now...and i am not sure about the answers of the folowing questions...can anyone please help me to check???? THANKS A LOT!!!! (The "*" represents the answer I chose) In the United States, early warning systems have not greatly ...
*July 7, 2010 by Monique*

**chemistry**

lets just say that 5g of solid benzoic acid burns under gaseous oxygen atmoshphere. Temperature increases from 20c to 50c. So is this exothermic so the sign is negative? how is it not the same as 2 mol of solid iron (C = 25.1 J/(mol K)) is heated from 20C to 200C(endothermic) ...
*March 10, 2010 by eng*

**physics**

A worker of a moving company places a 308 kg trunk on a piece of carpeting and slides it across teh floor at a constant velocity by exerting a horizontal force of 425 N on the trunk. What horizontal force must the mover apply to move the trunk at a constant rate?
*November 4, 2008 by Anonymous*

**Mechanics & hydromechanics**

Three forces pulling on a body are in equilibrium. The direction of one is due south, the direction of another is 80 degrees east of north, and the third force acts in the direction of 35 degrees west of north. If the magnitude of southerly force is 38 N, find the magnitudes ...
*January 16, 2013 by joe*

**what volume of 0.4 M HCl is required to neutralize**

what volume of 0.4 M HCl is required to neutralize 100.0 mL of 0.3 M LiOH?
*July 28, 2009 by Sunshine*

**physics**

describe the force board experiment to show how to obtain the resultant of two non-parallel coplanar force acting at a point.four forces of magnitude 10N, 5N, 4N, AND 6N acts on an oblect in the direction north. West, east and south respectively.find the magnitude and ...
*July 27, 2011 by jude*

**physics**

Pam has a mass of 33.0 kg and she is at rest on smooth, level, frictionless ice. Pam straps on a rocket pack. The rocket supplies a constant force for 15.0 m and Pam acquires a speed of 60.0 m/s. (a) What is the magnitude of the force? 1 N (b) What is Pam's final kinetic ...
*May 10, 2012 by dan*

**Physics**

Two fraternities are in a tug of war. Theta Chi is pulling with a total force of 4,748 newtons to the east and Tau Kappa is pulling with a total force of 3,969 newtons to the west. What is the magnitude and direction of the resultant? Which team will win? Is it better to pull ...
*November 27, 2012 by Amanda*

**physics**

Two small charged balls have a repulsive force of 0.20N when they are separated by a distance of 0.90m . The balls are moved closer together, until the repulsive force is 0.58N . How far apart are they now? Express your answer to two significant figures and include the ...
*January 27, 2014 by James*

**Calculus - free body diagram **

A water tank has the shape of an inverted right circular cone whose base radius is equal to half its height. Water is being pumped in at 2 cubic meters per second. How fast is the water rising when the water is 3 meters deep?
*October 7, 2012 by Lizzy*

**Chemistry**

How many kilograms of water at 15oC can be heated to 95oC by burning 143 grams of methane, CH4, assuming that 100% of the heat is used to heat the water. The heat of combustion of methane is 891 kJ per mole of methane. (The specific heat of water is 4.184 J/goC.) I am not sure...
*January 30, 2012 by Hannah*

**Math**

How to setup this equation? Find the ratio of the surface area of a cylinder to the volume of the cylinder if the height remains at 10 cm. Simplify this ratio and let f(x) = the simplified ratio. Let r be the radius of the cylinder. a) Find the average rate of change as the ...
*January 15, 2012 by melinda*

**Chemistry**

Would a substance that does not form hydrogen bonds have a high or low surface tension? What about vapor pressure, specific heat,heat of vaporization or boiling point? It requires extra energy to break hydrogen bonds so a substance that does not form H bonding can evaporate ...
*March 6, 2007 by Dave*

**Chemistry **

If you can show me an example of one problem, I have no idea how to approach this. Calculate where the number 40.67 came from. Use the Clapeyron-Clausisus equation. Assuming that delta H vap does not change with temperature, this equation relates the change in vapor pressure ...
*February 26, 2012 by Angel*

**Physics**

1. What is the best way to determine levelness? Plot Position versus Time and compare the linear fit from each direction of travel; slopes should be equal. See if the Acceleration versus Time for both directions are both zero. Plot the Acceleration versus Time for one ...
*March 27, 2008 by Sandhya*

**Physics**

The maximum lift force on a bat is proportional to the square of its flying speed v. For the hoary bat (Lasiurus cinereus), the magnitude of the lift force is given by FL (0.020 N·s2/m2)v2 The bat can fly in a horizontal circle by "banking" its wings at an angle θ, as ...
*March 13, 2010 by Ana*

**Chem**

This is also from the lab concerning activity serious of metals and calculation of electrode portentions... Question: What are the standard conditions for measuring potentials? Does that mean... Standard condition for temp: 298K Concentration: 1 molar concentration Pressure: 1...
*March 28, 2007 by Marisol*

**science**

Which of the following is true about an object that floats in water? (1 point) The object is less dense than frozen water. The mass of the object is less than that of water. The density of the object is less than that of water. The volume of the water is greater than the ...
*March 1, 2013 by kristin*

**Science**

Which of the following is true about an object that floats in water? (1 point) The object is less dense than frozen water. The mass of the object is less than that of water. The density of the object is less than that of water. The volume of the water is greater than the ...
*April 19, 2013 by William *

**Chemistry**

50.00 mL samples of 0.200 mol/L potassium phosphate with an excess of 0.120 mol/L lead II nitrate solution. what is the minimum volume of lead II nitrate solution required? What volume of lead II nitrate solution should the instructor tell the students to use? Describe how the...
*April 11, 2012 by Michelle*

**Physics**

A student uses a bottle opener to find that a force of 15 N must be exerted to lift a cap 1.4mm. The opener has a velocity ratio of 16 and efficiency of 90% (a) What is the mechanical advantage of the opener? (b) What force is applied to the bottle cap? (c) How far does the ...
*July 7, 2009 by Mohammedabbas*

**PHYSICS CIRCULAR MOTION GRAVITATIONAL CONSTANT**

Three masses are arranged in an (x, y) plane. 7 kg (-3,1) 8 kg (0,0) 9 kg (1,2) a) What is the magnitude of the resulting force on the 8 kg mass at the origin? The universal gravitational constant is 6.6726 × 10^−11 N · m^2/kg^2. Answer in units of N. b) What is the ...
*November 14, 2010 by Jaylee*

**Integrated Physics and Science**

A crowbar is used as a lever. The effort force of 40 newtons moves 3 meters. The resistance force of 54 newtons moves 2 meters. What is the efficiency of the lever? A) 100% because energy must be conserved B) 90% C) 25% D) 18% i need help. i don't know how to figure this one out
*January 10, 2011 by Nella*

**Physics**

2 blocks are in contact on a horizontal table. A force is applied on the first block at a 30* angle. The blocks move to the right side. If m1 = 2kg and m2 = 1kg and F = 6 N kinetic friction at the middle of the 2 blocks and the table = 0.250 Find the "contact force" between ...
*December 8, 2011 by Tom*

**Physics2**

2 blocks are in contact on a horizontal table. A force is applied on the first block at a 30* angle. The blocks move to the right side. If m1 = 2kg and m2 = 1kg and F = 6 N kinetic friction at the middle of the 2 blocks and the table = 0.250 Find the "contact force" between ...
*December 9, 2011 by Jim*