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January 30, 2015

Search: If the linear speed of the disk is 1.35 m/s, find the translational kinetic energy, rotational kinetic energy, and the total kinetic energy of the rolling hoop.

Number of results: 102,507

Science ENGR
Consider a laser which emits photons with a wavelength of 1.55 micrometers. The laser has a lower electron level Ei and an upper electron level Eu. A power supply pours electrons into the upper energy level and these electrons fall down in a time T= 0.1 nanosecond to the lower...
November 19, 2006 by Pam

Physics repost
A current of 5.0 A flows for 20.0 minutes through a bulb and delivers 15000 J of electric energy to the bulb. What is the potential difference across the bulb? A)2.5 V B)4 V C)100 V D)100 V (book typo) I was told to do this: energy= V*I*time in seconds solve for v. I don't ...
April 9, 2008 by Jon

gen physics II
Very large capacitors have been considered as a means for storing electrical energy. If we constructed a very large parallel-plate capacitor of plate area 1.0 m2 using paper (k= 3.7) of thickness 1.0 mm as a dielectric, how much electrical energy would it store at a plate ...
July 26, 2010 by Alinkashia

College Chemistry
Consider a mixture of air and gasoline vapor in a cylinder with a piston. The original volume is 50. cm3. If the combustion of this mixture releases 955 J of energy, to what volume will the gases expand against a constant pressure of 675 torr if all the energy of combustion is...
October 31, 2011 by Amanda

Chemistry: Thermal Energy
Hi! I have a quiz tomorrow and there are a couple of things that I am confused about: -Why does heat cause convection currents in gases and liquids, but not solids? -How can one object feel warmer than another object if they are at the same temperature? -Why doesn't the ...
March 1, 2012 by Cicilia

Science 8 - Check Answers
Please Check Answers. 4. When a fan is turned on, it changes electrical energy into ______ energy. A. motion * B. magnetic C. gravitational D. electromagnet 5. An experiment discovered that a particular material was a poor conductor of electricity. This material would most ...
November 14, 2014 by Georgia

Physics
A 260 kg piano slides 4.1 m down a 30 incline and is kept from accelerating by a man who is pushing back on it parallel to the incline (Fig. 6-36). The effective coefficient of kinetic friction is 0.40. (a) Calculate the force exerted by the man. (b) Calculate the work done ...
November 14, 2010 by Joe

Physics
A 255 kg piano slides 4.3 m down a 30 incline and is kept from accelerating by a man who is pushing back on it parallel to the incline (Fig. 6-35). The effective coefficient of kinetic friction is 0.40. (a) Calculate the force exerted by the man. (b) Calculate the work done ...
March 2, 2011 by Maria

Physics
A 255 kg piano slides 4.3 m down a 30 incline and is kept from accelerating by a man who is pushing back on it parallel to the incline (Fig. 6-35). The effective coefficient of kinetic friction is 0.40. (a) Calculate the force exerted by the man. (b) Calculate the work done ...
March 2, 2011 by Maria

Physics
A 305 kg piano slides 4.0 m down a 30 incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.40. (a) Calculate the force exerted by the man. (b) Calculate the work done by the man on...
March 23, 2011 by Robert

physics
You are hired as ballistics expert and need to measure the muzzle speed of the bullet (with a mass, m = 20 g) for the gun. You fire a ballistic gun horizontally into a 2-kg ballistic pendulum (M = 2 kg) hanging at rest on a massless rod. After the bullet hits it and becomes ...
February 23, 2011 by Anonymous

English
Why is the future of solar energy bright? 1. Every year, solar cells are becoming cheaper and better. Solar energy is also clean and it will never run out. 2. Because every year, solar cells are becoming cheaper and better, solar energy is also clean, and it will never run out...
May 18, 2010 by rfvv

Physics
If ^235U (235.043930 u) is struck by a neutron it undergoes fission producing ^144 Ba (143.922953 u), ^89 Kr (88.917630 u) and three neutrons (1.0086649 u). (a) Calculate the energy in MeV released by each fission reaction. (b) Calculate the energy released per gram of ^235U ...
August 18, 2010 by Brianna

Chemistry
Consider a beaker of water that has an initial temperature of 25 degree centigrade. when an ionic salt is dissolved in the water, the temperature changes to 5 degree centigrade. 1. what would you feel if you touch the beaker. 2. is the energy of the product higher or lower ...
July 11, 2012 by Nene09

Chemistry
When 0.312g of glucose was burned in a bomb calorimeter (heat capacity 641 J/K) the temperature rose by 7.739 K. Calculate the standard enthalpy of combustion and the standard internal energy of combustion. I've calculated the standard enthalpy but am unsure of how to go about...
September 25, 2012 by Kalli

chemistry
You are studying the formation of HI(g) from its gaseous elements H2(g) and I2(g). The free energy of formation of HI(g) is 10.10 kJ/mol at 500 K. When the free energy change of the process at 500 K is zero, the reaction mixture shows partial pressures of HI and I2 as 10.0 ...
April 18, 2013 by Yasemine

chemistry (WEBWORK)
Use the labels (CV+, OH, CVOH, , Ea (activation energy), & G) to complete the reaction potential energy profile below. More than one answer is possible for some spots. a. (Use i, ii, iv, etc. for your answer) b. (Use i, ii, iv, etc. for your answer) c. (Use i, ii, iv, etc. ...
July 17, 2010 by june

PHYSICS - HELP
A spring id vertically, as shown below, and a 500g mass is hung from its lower end. The EQUILIBRIUM extension of the spring is observed to be 10.0cm. (1) What is the spring constant of the spring? ANSWER: 49N/m (B) If the is pulled down by 5.00cm and released, what is the ...
August 5, 2011 by Melissa

PHYSICS - HELP
I NEED HELP ON C THROUGH F. THANK YOU A spring id vertically, as shown below, and a 500g mass is hung from its lower end. The EQUILIBRIUM extension of the spring is observed to be 10.0cm. (1) What is the spring constant of the spring? ANSWER: 49N/m (B) If the is pulled down by...
August 7, 2011 by Melissa

Solar Energy
Family Cartman has a small house in the country side which is not connected to the grid. The place enjoys 4 equivalent sun hours. Therefore, Mr Cartman has decided to install an off-grid PV system in the house to supply the required electicity in the house. The house ...
November 14, 2013 by Anonymous

physics
A 0.40-kg block slides along a small track with elevated ends and a flat central part. The flat part has a length L = 1.84 m. The curved portions of the track are frictionless, but for the flat part the coefficient of kinetic friction is 0.132. The block is released from rest ...
February 22, 2012 by Katie

physics
A 3.28-kg bucket is attached to a disk-shaped pulley of radius 0.108 m and mass 0.727 kg. (a) If the bucket is allowed to fall, what is its linear acceleration? (b) What is the angular acceleration of the pulley? (c) How far does the bucket drop in 1.65 s?
November 17, 2011 by tara

Physics
A 64.4-kg skateboarder starts out with a speed of 2.11 m/s. He does 81.6 J of work on himself by pushing with his feet against the ground. In addition, friction does -289 J of work on him. In both cases, the forces doing the work are non-conservative. The final speed of the ...
December 5, 2012 by P

ph
A 64.4-kg skateboarder starts out with a speed of 1.95 m/s. He does 119 J of work on himself by pushing with his feet against the ground. In addition, friction does -260 J of work on him. In both cases, the forces doing the work are non-conservative. The final speed of the ...
March 11, 2014 by Anonymous

Chemistry- HWK CHECK
1. A solution in which no more solid can be dissoved is referred to as ____. Answer: saturated 2.At constant pressure, heat can be referred to as (entropy, enthalpy, or free energy). Answer: enthalpy The measure of disorder or randomness of a system is(entropy, enthalpy, or ...
August 4, 2008 by Blair

phy
A 290 kg piano slides 4.6 m down a 30 incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.40. (a) Calculate the force exerted by the man. N (b) Calculate the work done by the man ...
September 25, 2010 by mas

Chemistry
(1) Use the thermodynamic values to (a) deduce the enthalpy change of each reaction (b)state if the reaction is exothermic,or endothermic,and also how much energy is released or absorbed. For thi reactions; (1) NH4NO3 (s)------>N2 (g) + 2H2O (l) (2) 4Zn (s) + 9HNO3 (aq...
March 12, 2013 by Shane

Physics
A solid ball and a hollow ball, each with a mass of 2 kg and radius of 0.1 m, start from rest and roll down a ramp of length 2 m at an incline of 34. An ice cube of the same mass slides without friction down the same ramp. What is the speed of the solid ball at the bottom of ...
June 18, 2012 by James

Chemistry
Constant-volume calorimeters are sometimes calibrated by running a combustion reaction of known ΔE and measuring the change in temperature. For example, the combustion energy of glucose is 15.57 kJ/g. When a 2.500 g sample of glucose burns in a constant volume calorimeter...
October 23, 2014 by Kales

PHYSICS
When the speed booster is set up horizontally at the edge of a table (h=1.11 m) it sends a toy car of mass m=0.06kg in the projectile motion, so that it lands at horizontal distance of x1=1.36 m away from the edge of the table. When the sam car with the same speed booster are ...
November 1, 2012 by Emily

physics - rotational motion
A small car of mass, m, is release at height, h, on a steel track. the car rolls down the track and through the loop of radius, R. at the end of the rack, the car rolls off the track, which is positioned at height, H, above the floor. neglect friction and the small amount of ...
April 22, 2011 by Lauren

Chem
You place a test-tube of a room temperature reagent into a beaker of hot water. Which of the following statements are true? (Assume that there are no energy transfers between anything except the reagent and the water.) Choose at least one answer. a. q reagent is negative. b. ...
November 2, 2010 by John

Science help
14. The energy role of the first organism in a food chain is always a(n) ___________. (1 point) 15. Water is a(n) __________ factor in all ecosystems that all living things require. (1 point) 16. ___________bacteria carry out the conversion of gaseous nitrogen to a ...
April 27, 2014 by Anoymous

Physics
an electric motor is used to pull a 125 kg box across a floor using a long cable. the tension in the cable is 350 N amd the box accelerates at 1.2 m/s^2 [forward] for 5 seconds. the cable breaks and the box slows down and stops. calculate the coefficient of kinetic friction? ...
October 9, 2011 by marr

college physics
A 0.50-kg block slides along a small track with elevated ends and a flat central part. The flat part has a length L = 1.85 m. The curved portions of the track are frictionless, but for the flat part the coefficient of kinetic friction is 0.103. The block is released from rest ...
March 25, 2012 by jerry

physics
It is estimated that in the United States (population 250 million) there is one electric clock per person, with each clock using energy at a rate of 3.5 W. Using this estimate, how much energy is consumed by all the electric clocks in the United States in a year? 1 . J I got 2...
May 16, 2012 by Brianna

Chemistry
At 25 C, the equilibrium partial pressures for the following reaction were found to be PA = 4.10 bar, PB = 5.60 bar, PC = 1.20 bar, and PD = 9.70 bar. 2A(g)+2B(g)-->C(g)+ 3D(g) What is the standard change in Gibbs free energy of this reaction at 25 C. I don't really get ...
April 25, 2014 by Alexis

Physics- Elena please help!
A 85.0 kg base runner begins his slide into second base when he is moving at a speed of 2.10 m/s. The coefficient of friction between his clothes and Earth is 0.570. He slides so that his speed is zero just as he reaches the base. (a) How much mechanical energy is lost due to ...
October 9, 2012 by Anonymous

Physics
"The energy that is transferred as heat to or from the object with the larger heat capacity must be greater than the energy that is transferred as heat to or from the object with the smaller heat capacity." Can someone explain why this concept is true or false?
June 21, 2011 by Josh

Astronomy
What were the relative energy densities in the early Universe? (below, DE means dark energy) (a) They remain roughly equal: rad ∼ mat ∼ DE (b) DE > mat > rad (c) rad > mat > DE (d) mat > rad > DE
October 1, 2013 by qwerty

phisic
(a) One such reaction fuses two nuclei of carbon-12 (12/6C ) to form an atom of neon (20/10Ne ) with the emission of an α-particle. Write an equation for this process, indicating the atomic number and mass number of each of the products in the usual way. (b) Another ...
April 20, 2013 by john ergent help pleaseeeeeeeeeeeeeeeeeee?

Physics
1. A person runs 800. m at an average speed of 6.00 m/s and then the next 800. m at an average speed of 8.00 m/s. Calculate (a) the total time of travel and (b) the average speed. 2. Sam travels by car from one city to another. He drives for 45.0 min at 95.0 km/h, 30.0 min at ...
June 24, 2014 by Jade

Physic Help!!!!
I need help with ONE PROBLEM but it's really long. Can some please Look at it, and help me out? A Family is at the ice rink, trying out ice skating. Mother has a mass of 65kg, father has a mass of 85kg, and the twins, who are seven years old, each have a mass of 23kg, and all ...
March 4, 2008 by Anonymous

physics
The coefficient of static friction between a block and a horizontal floor is 0.414, while the coefficient of kinetic friction is 0.107. The mass of the block is 4.03 kg. A horizontal force is applied to the block and slowly increased. What is the value of the applied ...
September 23, 2012 by Liz

Physics
The tracks of Angel's flight extend 96.0 m along the side of a hill at an angle of 18.4 degrees with respect to the horizontal. If each car has a passenger with a mass of 70.0 kg, what is the total mechanical energy associated with the two passengers when the cars are about to...
October 24, 2009 by lalaglaze

Physics
An Olympic diver performs a dive from the 10 m platform and achieves a speed of 14 m/s just before entering the water. Neglecting air friction, approximately how many times larger the divers speed than the diver would have achieved by performing from a 1 m platform? How much ...
March 15, 2012 by Timmy

gen chem
suppose a compound could point in any of the three directions in the solid and still have the same energy. how many molecules would there be if the total entropy of a solid sample of this compound was 3.48x10^-9 j/k
May 9, 2010 by chemistry

Physics
A block on a spring moves in SHM with amplitude 0.23 m and period 3.8 s. The mass of the block is 2.1 kg. What is the total energy of the system? Can someone please take me step by step and show me what my answer should be? Thanks!
June 24, 2012 by Kate

Chemistry
Why are combustion reactions always exothermic? Is it just because it gives off heat? Thanks ahead of time Exothermic MEANS it gives off heat; therefore, I don't think that can be a reason. Think of wood burning. Magnesium strips burning. A wax cancle burning. Anything burning...
January 30, 2007 by Mercedes

statistics
A sudent is analyzing data from an experiment using a linear model. when the student entered the data into his calculator and ran a least squares linear regression the calculator gave a correlation coefficient of 0.01. what can the student infer from this coefficient? 1. the ...
January 7, 2012 by luckybee

phyzzzics
I NEED ANSWERS AND HOW YOU GOT IT~!! 3. If you use a horizontal force of 30.0 N to slide a 12.0-kg wooden crate across a floor at a constant velocity, what is the coefficient of kinetic friction between the crate and the floor? 4. A force of 4.0N is large enough to overcome ...
December 6, 2009 by johnica!

Physics - Work and Energy
Jane, looking for Tarzan, is running at top speed (3.6 m/s) and grabs a vine hanging vertically from a tall tree in the jungle. How high can she swing upward? Does the length of the rope matter?
November 16, 2009 by DJ

physics
a motorist runs out of gas and must push his 3000kg car across a flat road 200m to the gas station. ignoring friction how much work must be done in order to get the car to the gas pump? if the motorist accomplishes this in 10 minutes, how much power has he applied? what if the...
January 8, 2011 by matt

physics
A block of mass 2 kg is propelled by a spring with spring constant k=5200N/m onto a smooth (frictionless) track. The spring is initially compressed a distance of 0.13 m from its equilibrium configuration. At the end of the track there is a rough inclined plane at an angle of ...
October 28, 2010 by Nicole

Chemistry
Consider a mixture of air and gasoline vapor in a cylinder with a piston. The original volume is 30. cm3. If the combustion of this mixture releases 980. J of energy, to what volume will the gases expand against a constant pressure of 640. torr if all the energy of combustion ...
November 18, 2010 by Mattie

math gre ques
A sudent is analyzing data from an experiment using a linear model. when the student entered the data into his calculator and ran a least squares linear regression the calculator gave a correlation coefficient of 0.01. what can the student infer from this coefficient? a. the ...
January 8, 2012 by luckybee

Chemistry
The standard internal energy change for a reaction can be symbolized as ΔUrxn or ΔErxn. For the following reaction equations, calculate the energy change of the reaction at 25 C and 1.00 bar. Sn(s) + 2Cl2(g) --> SnCl4(l) ΔHrxn = -511.3 kJ/mol ΔUrxn...
September 21, 2013 by Anonymous

physics
In preparation for shooting a ball in a pinball machine,a spring (K=675N/m) is compressed by 0.0690m relative to its unstrained length. The ball(m=0.600kg) is at rest against the spring at point A.When the spring is released, the ball slides (without rolling) to point B, which...
April 1, 2007 by Cavin

physics
A car of mass m traveling at speed v on a horizontal road applies its brakes and comes to rest in time t while traveling a distance of d. The amount of internal energy created is?
March 23, 2013 by wyatt

physics
The Sun radiates about 4 1026 J of energy into space each second. How much mass is released as radiation each second? The speed of light is 3 108 m/s. Answer in units of kg
May 29, 2013 by Anonymous

Physics
A person must move two heavy packages over a surface level so they place a 20kg package over a 30kg package and decide to move them together. The coefficient of kinetic friction between the lower package and the ground is 0.3. The person exerts a force of 400N at an angle of ...
April 2, 2008 by Alex

Physics
A person must move two heavy packages over a surface level so they place a 20kg package over a 30kg package and decide to move them together. The coefficient of kinetic friction between the lower package and the ground is 0.3. The person exerts a force of 400N at an angle of ...
April 2, 2008 by Alex

electrical engineering
A three phase, four- pole, 30-hp, 220-V, 60-Hz, Y-connected induction motor draws a current of 77 A from the line source at a power factor of 0.88. At this operating condition, the motor losses are known to be the following: Stator copper losses = 1033 W Stator core losses = ...
April 19, 2014 by nuts

Physics
The frequency of violet light is about twice that of red light. How does the energy of a violet photon compare with the energy of a red photon?
April 1, 2008 by Dallas

science help?
(a) One such reaction fuses two nuclei of carbon-12 ( 6 12C ) to form an atom of neon ( 10 20Ne ) with the emission of an α-particle. Write an equation for this process, indicating the atomic number and mass number of each of the products in the usual way. (b) Another ...
March 18, 2013 by sam

8th Grade Science
There is a connection between photosynthesis and cellular respiration. The products from one provide the raw materials for the other. What products of photosynthesis are starting materials for cellular respiration? A. glucose and oxygen B. heat energy and ATP C. carbon dioxide...
March 6, 2014 by Lauren

physics
An automobile tire has a radius of 0.455 m, and its center moves forward with a linear speed of v = 15.7 m/s. Determine the angular speed of the wheel.
March 11, 2012 by Katie

physics
A pendulum consists of a uniform disk with radius r = 10 cm and mass 480 g attached to a uniform rod with length L = 500 mm and mass 175 g. (a) Calculate the rotational inertia of the pendulum about the pivot. (b) What is the distance between the pivot and the center of mass ...
April 15, 2007 by john

TRIG
A circular power saw has an 8-1/2 inch diameter blade that rotates at 4400 revolutions per minute. a)Find the angular speed of the saw blade in radians per minute. b)Find the linear speed in feet per minute of one of the 24 cutting teeth as they contact the wood being cut. I'd...
September 23, 2012 by Daisy

English
A: What do you think of a solar house. 1. I think the solar house makes money for us. 2. I think we can save energy thanks to the solar house. 3. I think we don't need to spend money on electricity. 4. I think we don't need to pay the electricity fee. 5. I think it is a good ...
November 18, 2010 by rfvv

Physics- check answer please
I am supposed to fill in the blanks without a word bank. 1. I you push a crate with 40 N of force at an angle of 30 degrees and your friend pushes with a force of 40 N horizontally, the amount of work you are doing is _____ the amount of work your friend is doing on the crate ...
July 2, 2014 by Liz

physics
An object of mass 10.0 kg is released from the top of an inclined plane which makes an angle of inclination of 30 degrees with the horizontal. The object slides along the inclined plane. The questions refer to the instant when the object has traveled through a distance of 2.00...
July 31, 2010 by Chika

Physics
A block of mass 3.1 kg hangs vertically from a frictionless pulley of mass 5.9 kg and radius 14 cm. Treat the pulley as a disk. Find: a) the acceleration of the block; b) the tension in the rope; c) the speed of the block after it has fallen 55 cm, assuming it started at rest:
November 28, 2011 by warrren

Science
A block of mass 3.1 kg hangs vertically from a frictionless pulley of mass 5.9 kg and radius 14 cm. Treat the pulley as a disk. Find: a) the acceleration of the block; b) the tension in the rope; c) the speed of the block after it has fallen 55 cm, assuming it started at rest:
November 30, 2011 by John

statistic and probability
a disk drive is randomly selected from 50 available disk drives, of which five are defective. What is the probability that it is not defective?, hope you answer this, thanks! :)
September 20, 2012 by nitz

chemistry
For a one step reaction, the activation energy for the forward reaction is 40.0 kJ/mol and the enthalpy of reaction is -20.0 kJ /mol. Which statement below is true? a. The activation energy of the forward reaction would be affected to a greater extent than the activation ...
February 27, 2012 by john117

Physics
An object (m=2.85 kg) is attached to a disk-shaped pulley. The diameter of the pulley is 0.242 and its weight is 7.272 N. Suppose the object is allowed to fall (a) What is its linear acceleration? (b) What is the angular acceleration of the pulley? (c) How far does the bucket ...
November 27, 2012 by Hank

Physics
2 objects are connected on an inclined table. The objects have masses 8.0kg, 4.0kg, and 2.0kg, and the pulleys are frictionless. (The one that is 8.0 is suspended from a pulley off the left side of the table, 4.0kg is on the table, and 2.0kg is suspended from the pulley of the...
August 2, 2013 by Jen

Physics
Buddy is unloading 7kg cans using a 45 degree downward ramp. The ramp was made slippery by the a detergent spill before. Buddy can push the cans off of his truck with an initial velocity of .2 m/s and it moves as 1.2 m/a by the time it reaches the lowest point on the ramp. The...
October 7, 2014 by Steven

PHYSICS.
5. A motor lifts a 12 kg mass to a height of 15 m at a constant velocity in 3.5 s. a) Find the power b) If the motor is only 35% efficient find the input energy.
June 17, 2014 by Unknown

PHYSICS
A 54.0-cm diameter disk rotates with a constant angular acceleration of 2.0 rad/s2. It starts from rest at t = 0, and a line drawn from the center of the disk to a point P on the rim of the disk makes an angle of 57.3 with the positive x-axis at this time. Find the position ...
July 13, 2011 by Kevin

Chemistry
find the color of light that is known to have an energy of 4.59x10^-19joules Explanation too please.
October 16, 2011 by BIlly

Physics
A meteor has a speed of 90.0 m/s when 900 km above the Earth. It is falling vertically (ignore air resistance) and strikes a bed of sand in which it is brought to rest in 3.19 m. (a) What is its speed before striking the sand? (b) How much work does the sand do to stop the ...
February 26, 2014 by Anonymous

Math
Determine if the relationship represented in the table is linear. If it is linear, write an equation. x|-2 5 7 10 12 20 y| 3 0 2 5 7 15 My answer is: Linear; y=x+ -5 Is this correct? Thanks.
September 20, 2009 by B.B.

physics 1
A 64.4-kg skateboarder starts out with a speed of 1.95 m/s. He does 119 J of work on himself by pushing with his feet against the ground. In addition, friction does -260 J of work on him. In both cases, the forces doing the work are non-conservative. The final speed of the ...
March 11, 2014 by Anonymous

Chemistry
For a one step reaction, the activation energy for the forward reaction is 40.0 kJ/mol and the enthalpy of reaction is -20.0 kJ /mol. Which statement below is true? a. The activation energy of the forward reaction would be affected to a greater extent than the activation ...
March 1, 2012 by Mohamed

Science - Melting Ice
In the process of heating ice into the boiling state of its liquid form, did the procass absorb or release energy? Did the molecules spontaneously move fast? Where did the energy come from and where did it go? did it increase or decrease? was it lost? Were the molecules ...
October 18, 2006 by Sigor

physics
The coefficient of static friction between a block and a horizontal floor is 0.35, while the coefficient of kinetic friction is 0.12. The mass of the block is 4.5 kg. A horizontal force is applied to the block and slowly increased. (a) What is the value of the applied ...
February 16, 2012 by Julie

physics
The coefficient of static friction between a block and a horizontal floor is 0.40, while the coefficient of kinetic friction is 0.15. The mass of the block is 5.0 kg. A horizontal force is applied to the block and slowly increased. (a) What is the value of the applied ...
March 15, 2012 by nuwan

physics
The coefficient of static friction between a block and a horizontal floor is 0.40, while the coefficient of kinetic friction is 0.15. The mass of the block is 5.0 kg. A horizontal force is applied to the block and slowly increased. (a) What is the value of the applied ...
March 15, 2012 by tharidu

physics
The coefficient of static friction between a block and a horizontal floor is 0.40, while the coefficient of kinetic friction is 0.15. The mass of the block is 5.0 kg. A horizontal force is applied to the block and slowly increased. (a) What is the value of the applied ...
March 15, 2012 by tharidu

physics
(1)A parallel-plate capacitor carrying charge q0 is modified by the insertion of a dielectric with κ = 4.3 between the plates. As a consequence, the energy stored in the capacitor quadruples. What will the charge be after the dielectric is inserted? (2)A metal sphere of ...
February 21, 2010 by Sandhya

Physics
a 55 kg skateboarder starts out with a speed of 1.8 m/s. he does +80 J of work on himself by pushing with his feet against the ground. in addition, the friction does -265 J of work on him. in both cases, the forces doing the work are nonconservative. the final speed of the ...
December 4, 2010 by Justin

Algebra II
Determine if the following equation is linear. -7^2+y^2-y^2=3x+7 Linear and Standard Form ______________ or Non Linear
March 5, 2013 by Shelvia

physics
The scale of a certain spring balance reads 1200 N when the spring is stretched 0.1m. (a) What is the potential energy of the spring when it is stretched 0.1m and when it is stretched 0.5 m? (b) What is the potential energy when a 50 kg mass hangs from the spring?
November 3, 2011 by pakilina

Physics
A mass of 1.0 kg is located at the end of a very light and rigid rod 44 cm in length. The rod is rotating about an axis at its opposite end with a rotational velocity of 3 rad/s. (a) What is the rotational inertia of the system? kg m2 (b) What is the angular momentum of the ...
April 6, 2012 by Jermaine

HEALTH
A calorie is defined as ________. A. A unit of energy supplied by foods with refined sugars B. A unit of measure supplied by cells C. A unit of measure supplied by carbohydrates D. A unit of energy supplied by food a?
August 1, 2012 by Aya

science
A researcher determined the amount of electrical energy entering a toaster and the amount of heat given off by the toaster. The amount of heat was less than the amount of electrical energy. How can this observation be explained?
April 3, 2014 by victoria

Linear Alebra
Show that the transformation T:R^2->R^2 given T(x1,x2)=(3x1-5x2,x1+2x2) is linear by verifying that satisfies the defination of linear.
August 13, 2010 by Jason

physics
A block of mass m = 2.67 kg is attached to a spring (k = 32.3 N/m) by a rope that hangs over a pulley of mass M = 5.34 kg and radius R = 6.41 cm, as shown in the figure. a) Treating the pulley as a solid homogeneous disk, neglecting friction at the axle of the pulley, and ...
March 30, 2011 by toot

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