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July 25, 2016

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: 120,706

Physics
it says create a graph from our data. rotational speed vs force. i know that independent variable goes on the x axis. but out of rotational speed and force which goes on the x axis and which goes on the y?
January 31, 2011 by JuJu

Physics
it says create a graph from our data. rotational speed vs force. i know that independent variable goes on the x axis. but out of rotational speed and force which goes on the x axis and which goes on the y?
January 31, 2011 by JuJu

physical
Suppose a sound of frequency 1200 Hz is emitted from a speaker 15 meters away from you. At YOUR location, the intensity is 1.0E-7 W/m2. Let me assume your eardrum has area 3E-5 m2. If the sound continues for 8 seconds, what total amount of energy is received by your ear?
March 7, 2013 by Anonymous

physics
the coefficients of static and kinetic friction for stone on wood are, respectively, 0.5 and 0.4. if a 150 kg stone statue is pushed with just enough force to start moving across a wooden floor and the same force continues to act afterward. find the statues acceleration.
November 7, 2012 by tom

Physics
A 17.9 kg block is dragged over a rough, hor- izontal surface by a constant force of 74.1 N acting at an angle of angle 32.3◦ above the horizontal. The block is displaced 72.4 m and the coefficient of kinetic friction is 0.242. Find the work done by the 74.1 N force. The...
June 22, 2014 by Kaylee

chemistry
(a) The characteristic emission from Ca occurs at 422.7 nm and corresponds to an electron going from a 4p orbital to a 4s orbital. Calculate the energy of the electron in the 4p orbital. Calculate Zeff for the electron in the 4p orbital. (b) The same 4p to 4s transition in ...
January 22, 2011 by Maria

Chemistry
Give the enthalpy change and entropy change values shown below calculate the free energy change for this reaction at 25 degrees C using Gibbs free energy equation. How does this value compare to the free energy change using the standard free energy of formation data? delta H=-...
May 16, 2007 by Christian

physics
Starting from rest, a 75 kg skier slides down a 17.0 slope. If the coefficient of kinetic friction between the skis and snow is 0.120 and it takes 16.9 s to get to the bottom, how long is the ski trail? (Use g = 9.8 m/s2.)
October 30, 2012 by Ashley

chemistry
A factory that specializes in the refinement of transition metals such as titanium was on fire. Provide kinetic-based arguments (concentration and temperature) explaining why water would be dangerous for the firefighters.
February 18, 2013 by ANNA

physics
two air carts of mass m1=0.84kg and m2=0.42kg are placed on a frictionless track. cart1 is at rest and has a spring bumper of constant force F=690N/m.cart2 has a metal bumper and moves towards cart1 with a speed V=0.68m/s. A) what is the speed of the two carts at the momentum ...
July 6, 2011 by said

physics
Consider N atoms conned on a surface of area A at temperature T . The atoms form a two-dimensional (2D) gas of classical, noninteracting particles. (a) Calculate the partition function for the system. (b) Calculate the Helmholtz free energy, F , of the gas. Compare it with ...
June 13, 2011 by esmat

physics
two different masses have equal, non zero kinetic energies. the momentum of the smaller mass is? what is the magnitude of momentum of a 0.140 baseball traveling at 45.0m/s? a 2.00g bullet hits and becomes embedded in 5.00 kg wood block which is hanging from a 1.60m long string...
February 25, 2009 by tina

physics
two different masses have equal, non zero kinetic energies. the momentum of the smaller mass is? what is the magnitude of momentum of a 0.140 baseball traveling at 45.0m/s? a 2.00g bullet hits and becomes embedded in 5.00 kg wood block which is hanging from a 1.60m long string...
February 25, 2009 by tina

Chemistry
Okay so I kinda understand where to put the numbers into the formula but i'm not sure how to calculate the distance so could someone kindly walk me through the problem so i can understand it. Thank you so much. Calculate the amount of energy required for the formation of one ...
November 3, 2011 by Amanda

physics
A 74.0kg person is put on an exercise program by a physical therapist, the goal being to burn up 550 food calories in each daily session. Recall that human muscles are about 21.0% in converting the energy they use up into mechanical energy. The exercise program consists of a ...
October 4, 2014 by dia

chemistry
C2H4O(g) CH4(g) + CO(g) Find the rate law of C2H4O? The following kinetic data were observed for the reaction at 688 K. Initial Concentration of Ethylene Oxide Initial Rate Exp. 1: 0.00272 M 5.57 10-7 M/s Exp. 2: 0.00544 M 1.11 10-6 M/s
January 22, 2011 by Nagaa

science
advanteges and disadvanteges of fossil fuels Check this site. http://home.clara.net/darvill/altenerg/fossil.htm advantages easy to get energy from not expensive to get energy from disadvantages pollutes the atmosphere with carbondioxide which leads to green house effect ...
October 12, 2006 by jazz

Physics
A basketball player 2.08 m tall wants to make a basket from a distance of 16 m. The hoop is at a height of 3.05 m. The acceleration of gravity is 9.8 m/s2 . Neglect air friction. 2.08 m 3.05 m 16 m v0 40.7◦ If he shoots the ball (from a height of 2.08 m) at a 40.7 ◦...
September 27, 2010 by Wendia

Physics
A M2= 6.40 kg mass is released from rest at height h = 6.60 m . Using the law of conservation of energy, determine the speed of the M1= 2.70 kg mass just as the M2= 6.40 kg mass hits the ground.
March 17, 2015 by James

chemistry
an endothermic reaction a to b has an activation energy of 15 kcal per mol and heat of reaction 5 kcal per mol the activation energy for the reaction b to a will be ?
August 17, 2014 by Anonymous

Physics
An RC-circuit has a time constant of 6x10-3 seconds. The capacitor stores a maximum energy of 8 J, when charged using a 3-Volt battery. Using the same battery, we want to increase tenfold the amount of stored energy, while keeping the same time constant (to ensure that the ...
April 27, 2010 by joe

health
What are the three parts of nutrition? what are nutrients? name the six classes of nutrients? if you eat a healthy diet, you are more likely to be what? what is metabolism? the nutrients in food that provide energy are what three things? the sugar that circulates im your blood...
October 5, 2010 by Anonymous

Chemistry
Factors affecting reaction rate. Use collision theory to explain. Factor: nature of the reactant Affect on rate: more or less reactive based on its chemical identity. reactivity: aq>g>l>s Explanation: For the other factors, we had to explain it based on whether the ...
March 3, 2013 by a Canadian

PHysics
a 15g bullet strikes and becomes embedded in a 1.1kg block of wood placed on a surface in front of the gun. if the coefficient of kinetic friction between the block and the surface is 0.25 and the impact drives the block a distance of 95m before it comes to rest, what was the ...
December 6, 2008 by Anne

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 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

Chemistry
In a gaseous system at equilibrium with its surroundings, as molecules of A(g) collide with molecules of B(g) without reacting, the total energy of the gaseious system 1. decreases 2. increases 3. remains the same
April 13, 2009 by A

physics
A block of mass m is initially at rest at the top of an inclined plane with a height = 4.4 m which makes and angle of θ = 17 degrees with respect to the horizontal. It is observed to be traveling at v = 0.2 m/s a distance d after the end of the inclined plane as shown. ...
October 7, 2013 by carlo

quantum
Consider a particle with mass m bound to a potential v(x) = k^2|x|. Using the WKB quantization condition, find the energy eigenvalues .
April 4, 2015 by physics

Physics
A girl coasts down a hill on a sled, reaching a level surface at the bottom with a speed of 6.2 m/s. The coefficient of kinetic friction between runners and snow is 0.059, and the girl and sled together weigh 736 N. The acceleration of gravity is 9.8 m/s^2 How far does ...
November 5, 2013 by Taylor

Physics help!!
A team of dogs drags a 150 kg sled 1.39 km over a horizontal surface at a constant speed. The coefficient of friction between the sled and the snow is 0.236. The acceleration of gravity is 9.8 m/s^2. Find the work done by the dogs. Also, What is the energy lost due to ...
December 1, 2011 by Elle

Chemistry
"Find the total energy lost by the contents of a Styrofoam picnic cooler when a 3.60 kg block of ice placed inside the cooler completely melts (at 0 Celsius). The ice had an initial temperature of -10.00 Celsius." (Answer is 1.27*10^3 kJ). I was thinking of using q=mct, but I ...
February 12, 2010 by Stuck

physics
1)7Be decays with a half-life of about 53 d. It is produced in the upper atmosphere, and filters down onto the Earth's surface. If a plant leaf is detected to have 300 decays/s of 7Be, how many days do we have to wait for the decay rate to drop to 13.6/s? Do not enter units. ...
April 15, 2008 by Sandhya

physics
A stock room worker pushes a box with mass 11.2 kg on a horizontal surface with a constant speed of 4.50 m/s. The coefficient of kinetic friction between the box and the surface is 0.25. a) What horizontal force must be applied by the worker to maintain the motion? b) If the ...
December 8, 2010 by Yosh

chemistry
If 1.000 kcal of heat is added to 1.700 L of oxygen in a cylinder at constant pressure of 1.00 atm, the volume increases to 2.100 L. Calculate the total energy change for this process. Pay careful attention to units. Some plz help me :(
November 19, 2009 by lori

Physics
But aceeleration due to gravity is 1o m/s.....so if a boy of mass 8kg falls from rest from a height of 1oom neglecting air resistance calculate his total energy after fallin down a distance of 4om.....pls a detailed answer
January 19, 2012 by Mozes dixon

human anatomy and physiology
living organisms require energy to function and this includes each and every one of the trillions of cells that constitute the human body. Define in detail and use diagrams appropriate to show how cells extract, use and store energy including but to limited to discussion of ...
August 23, 2005 by Kristen

human anatomy and physiology
4. living organisms require energy to function and this includes each and every one of the trillions of cells that constitute the human body. Define in detail and use diagrams appropriate to show how cells extract, use and store energy including but to limited to discussion of...
August 23, 2005 by Kristen

physics
A 2.40 kg firecracker explodes into two pieces and produces 170 J of heat, light, and sound energy. One of the pieces has a mass of 0.800 kg and a speed of 4.50 m/s after the explosion. If the mass of the other piece is 1.20 kg, what is its speed after the explosion?
June 20, 2014 by Martin

Physics
A Texas cockroach of mass 0.17 kg runs counterclockwise around the rim of a lazy Susan (a circular disk mounted on a vertical axle) that has radius 15 cm, rotational inertia 5.5 10-3 kgm2, and frictionless bearings. The cockroach's speed (relative to the ground) is 2.0 m/s, ...
October 26, 2009 by Ray

Physics
A block of wood is pulled by a horizontal string across a horizontal surface at a constant velotcity with a force of 20 N. What is the coefficient of kinetic friction between the surfaces?
October 13, 2010 by Kelsey

physics
determine the acceleration of a 25 kg crate being dragged across a floor by a 150 N force at a 42 degree angle above the floor where the kinetic coefficient of friction is .52.
April 23, 2012 by Syd

Physics Dynamics
A 5.0-kg box is pulled horizontally with a 45-N force that makes angle of 40 degree with the horizontal. The coefficient of kinetic friction of the surface is 0.20. What is the magnitude of the acceleration of the box?
February 8, 2015 by Anonymous

physics
a block of mass 5 kg is position at angle 45 degree ,a force of 10 newton is applied to the block parallel to the ground. is the coefficient of kinetic friction is 0.5 , calculate its acceleration?
October 9, 2015 by Amna

science
A 10-kg box is pulled along a horizontal surface by a force of 40N applied at a 30 angle above horizontal. The coefficient of kinetic friction is 0.3. Calculate the acceleration.
October 26, 2015 by mustafa

College Physics
Two pucks traveling at each other collide and deflect at 30.0 angles from their original velocities. The mass of Puck B is 20% greater than the mass of Puck A. Before colliding, the pucks approach each other with momenta of equal magnitudes and opposite directions. After ...
January 24, 2015 by Bill Smithers

physics help
A disk is rotating at 50rps (revolution per second) about its fixed axis (delta) with respect to which its moment of inertia is J= 210^-2 kg.m^2 A braking couple of moment -0.5N.m is applied to the disk (the sense of rotation of the disk is taken as positive ). The disk will ...
February 4, 2016 by angy

physics
A disk is rotating at 50rps (revolution per second) about its fixed axis (delta) with respect to which its moment of inertia is J= 210^-2 kg.m^2A braking couple of moment -0.5N.m is applied to the disk (the sense of rotation of the disk is taken as positive ). The disk will ...
February 4, 2016 by angy

Physics
A light string, connects blocks 1 and 2 of masses m1 and m2. These blocks are further connected to a block of mass M by another light string that passes over a pulley of negligible mass and friction. Blocks 1 and 2 move with a constant velocity v down the inclined plane, which...
December 9, 2010 by Rahul

Botany
Think of this example of an ecosystem: A large tree with grasshoppers, caterpillars and other animals eating the leaves, birds eating the leaf eaters, snakes eating birds and a hawk eating snakes. An energy pyramid that counts the number of organisms at each trophic level ...
September 5, 2011 by Joshue

Biology
Hi Im just wondering what are the similarites and differences between gas exchange and cellular respiration ? similarities: Both are involved in energy production. Gas x supplies o2 to the mito which creates usable energy for the body. differences; cellular occurs inside cells...
July 6, 2009 by Jim_R

Math
A 6.4 ton military fighter must land on a flight strip. If the plane lands at a speed of 368 mph, and the coefficient of kinetic friction is 0.72 between the wheels and the ground. If the runway must be at least 150% as long as the shortest possible landing distance of the ...
June 2, 2009 by Chelsea

Physics
A 930 kg sports car collides into the rear end of a 2500 kg SUV stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 2.6 m before stopping. The police officer, knowing that the coefficient of kinetic friction between tires and road is...
October 24, 2010 by Eden

Chemistry
The standard free energy of activation of one reaction is 94.3 kj/mol^-1 (22.54 kcal/mol^-1). The standard free energy of activation for another reaction is 76.4 kJ/mol^-1 (18.26 kcal/mol^-1). Assume temp of 298K and 1 M conc. By what factor is one faster than the other? Im ...
November 10, 2010 by Tokey

chemistry
The standard free energy of formation of the aqueous complex ion Cd(NH3)42+ is -226.1 kJ mol-1. The free energy of formation of NH3 is -26.50 kJ mol-1 and that of the Cd2+ ion is -77.61 kJ mol-1. The value of the stability constant for the complex ion Cd(NH3)42+ is: (a) 2.14 x...
March 28, 2010 by Bell90

Science
Please check my answers (at the bottom) with these questions. 1. An apple quickly changes color when exposed to air. This demonstrates a ________. (1 point) physical property chemical property physical change all of the above 2. When a chunk of dry ice is at room temperature, ...
May 7, 2013 by Annabelle Hartz

physics
Proper design of automobile braking systems must account for heat buildup under heaving braking. Calculate the thermal energy dissipated from brakes in a 1460-kg car that descends a 15.5 hill. The car begins braking when its speed is 92 km/h and slows down to a speed of 28 km...
February 14, 2011 by Johnathon

Physics
Proper design of automobile braking systems must account for heat buildup under heaving braking. Calculate the thermal energy dissipated from brakes in a 1360-kg car that descends a 13.5 hill. The car begins braking when its speed is 88 km/h and slows down to a speed of 36 km...
February 12, 2013 by Thomas

Physics
A rotating uniform-density disk of radius 0.7 m is mounted in the vertical plane. The axle is held up by supports that are not shown, and the disk is free to rotate on the nearly frictionless axle. The disk has mass 5 kg. A lump of clay with mass 0.3 kg falls and sticks to the...
November 8, 2012 by Udit

Physics
A 2.5 kg block is launched up a ramp at 9.0 m/s. If the ramp is 35 degrees above the horizontal and the coefficient of static friction is 0.60, while the coefficient of kinetic friction is 0.25. a. How far does the block go up the ramp from its starting point? b. What speed ...
October 20, 2011 by Me

Physics
A box is sliding down an incline tilted at an angle of 2.14 above horizontal. The box is sliding down the incline at a speed of 5.15 m/s. The coefficient of kinetic friction between the box and the incline is 0.387. How far does the box slide down the incline before coming ...
June 25, 2015 by Jen

chemistry
with would be more convenient? (A) burn 1 mole of carbon with 2 moles of sulfur and mesure the energy yield (B) burn 602,000,000,000,000,000,000,000 atoms of carbon with 1,204,000,,000,000,000,000,000,000 atoms of sulfur and measure the energy yield.
June 19, 2010 by eriika

Chemistry
Calculate the energy in joules of microwave radiation of wavelength 12.7 centimeters. (E = hν, h = 6.63 10-34 J.sec; speed of light = wavelength ν, speed of light = 3.0 108 meters/sec.)
September 29, 2015 by Destany

Physical Science
A 15 Kg object that is free falling has a total mechanical energy of 13,230 Joules. (A) From what height was the object dropped? (B) What is the velocity of the object when it hits the ground? (C) How long does the object fall?
January 8, 2011 by JJ

Physics
two cars of equal mass with equal speeds traveling perpendicular to one another collide completely in elastically. what percentage of the cars' total energy is lost in the collision?
February 25, 2014 by ritzi

chemistry-check answer
Suppose you have a 10 watt fluorescent light bulb. If this light bulb is 6 % efficient in turning electricity into light, then how many photons are being emitted per second? Assume that average energy of all the photons emitted is 550 nm, thus you can treat all the photons as ...
October 31, 2010 by Jazmin

Physics
Consider the hip joint. The bones are normally not in direct contact , but instead are covered with cartilage to reduce friction. The space between them is filled with synovial fluid, which reduces the friction further. Due to this fluid, the coefficient of kinetic friction ...
March 8, 2016 by tom

Physics
Consider the hip joint. The bones are normally not in direct contact , but instead are covered with cartilage to reduce friction. The space between them is filled with synovial fluid, which reduces the friction further. Due to this fluid, the coefficient of kinetic friction ...
March 8, 2016 by tom

physics
Consider the hip joint. The bones are normally not in direct contact , but instead are covered with cartilage to reduce friction. The space between them is filled with synovial fluid, which reduces the friction further. Due to this fluid, the coefficient of kinetic friction ...
March 8, 2016 by vanessa

Physics... Help!
A bullet of mass m=0.060 kg hits a 5.0 kg block with an initial speed of 225 m/s. The block is connected to a spring that is attached to a wall. The friction between the block and the table is negligible. Upon impact, the bullet bounces back from the box with a speed of 75 m/s...
October 28, 2012 by Rob

physics
Rubber tires and wet blacktop have a coefficient of kinetic friction of 0.5. A pickup truck with a mass 750 kg traveling 30.0 m/s skids to a stop. (a) what is the size and direction of the frictional force that the road exerts on the truck? (b) Find the acceleration of the ...
November 11, 2014 by bill

physics
A 220 N crate is pushed along the ground with a horizontal force. The coefficient of kinetic friction is 0.21 and the coefficient of static friction is 0.31. The crate moves at a constant speed of 4.1 m/s. a) Draw a free-body diagram for the crate. b) What is the size of the ...
November 15, 2011 by Kelsey

Physics
A 12 g bullet is fired horizontally into a 96 g wooden block initially at rest on a horizontal surface. After impact, the block slides 7.5 m before coming to rest. If the coefficient of kinetic friction between block and surface is 0.60, what was the speed of the bullet ...
January 5, 2012 by Nicole

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
Starting from rest, a crate of mass m is pushed up a frictionless slope of angle (theta) by a horizontal force of magnitude F. Use work and energy to find an expression for the crate's speed v when it is at height h above the bottom of the slope. Express your answer in terms ...
November 10, 2012 by Ohimai

Physics
A stuntman is being pulled along a rough road at a constant velocity by a cable attached to a moving truck. The cable is parallel to the ground. The mass of the stuntman is 110 kg, and the coefficient of kinetic friction between the road and him is 0.825. Find the tension in ...
March 20, 2013 by Kelly

physics
A block of mass 2.5 kg is pushed up against the vertical wall by a force of 60 N acting at 47◦ to the ceiling. The coefficient of kinetic friction between the block and the wall is 0.67. The acceleration of gravity is 9.8 m/s2 . Find the work done by this force in moving...
June 27, 2014 by Kaylee

physics
A box of mass 52 kg starts from rest to slide down a ramp that makes an angle of 16.6 degrees with respect to the horizontal. 4.1 seconds later, it has covered a distance of 3.98 meters. What is the coefficient of kinetic friction?
February 22, 2014 by Tammie

physics
A box of mass 50 kg starts from rest to slide down a ramp that makes an angle of 10.7 degrees with respect to the horizontal. 6.3 seconds later, it has covered a distance of 3.39 meters. What is the coefficient of kinetic friction?
September 30, 2015 by Caroline

physics
A 2 kg mass falls 40 m and buries itself into the ground 0.40 m. Find: a) How much work was done by gravity, b) How much potential energy was lost, and c) What was its speed when it hit the ground, and d) the average force causing the mass to stop once it hit the ground.
November 28, 2012 by Ted

Physics
Can't figure this one out. "In a pickup game of dorm shuffleboard, students crazed by final exams use a broom to propel a calculus book along the dorm hallway. If the 3.5 kg book is pushed from rest through a distance of 0.88 m by the horizontal 25 N force from the broom and ...
February 20, 2011 by Mark

Physics (simple electronics)
The electronic flash attachment for a camera contains a capacitor for storing the energy used to produce the flash. In one such unit, the potential difference between the plates of a 775 F capacitor is 330 V. (a) Determine the energy that is used to produce the flash in this ...
February 24, 2011 by Mike

physics
1.if frequency increases twice, how it change the energy carried by one pulse? (It may have no effect) 2. if the humidity of the air increased, what quantities will be affected: frequency, period, speed, and wavelength
February 12, 2009 by jaden

physics
With what minimum speed must you toss a 160 ball straight up to hit the 15 -high roof of the gymnasium if you release the ball 1.7 above the ground? Solve this problem using energy.
October 12, 2009 by Dan

ha
An atom emits a photon of wavelength 1.08 meters. What is the energy change occurring in the atom due to this emission? (Planck's constant is 6.626 10ȳ joule seconds, the speed of light is 2.998 10 m/s)
October 11, 2013 by gg

physics
A man skis down from the top of a hill 1500.0 m high, starting from rest. If he loses 50% of his initial mechanical energy to friction during his descent, what is his speed in m/s at the base of the hill?
November 5, 2014 by fun

Physics
A 3.0 kg block is being pulled with a horizontal force of 29.7 N. If the block is accelerating at 3.2 m/s/s, what is the coefficient of kinetic friction between the block and the table?
November 2, 2010 by keith

Physics
A toboggan approaches a snowy hill moving at 11.1 m/s . The coefficients of static and kinetic friction between the snow and the toboggan are 0.410 and 0.280, respectively, and the hill slopes upward at 42.0 ∘ above the horizontal. A)Find the acceleration of the toboggan...
February 14, 2016 by Samantha

science
Distinguish between high-energy and low-energy You have to put this in context. We dont do homework for you, but will be happy to critique your thinking. You have to put this in context. We dont do homework for you, but will be happy to critique your thinking.
July 6, 2007 by al

HELPPP
I printed out a summer activite to test my skill on science and i found some that i stumbled upon and couldnt figuire out so help? If im wrong then please correct me. 2.A 3.B 4.B 5.A 6.B 2.Giraffes have long necks that allow them to eat leaves in trees. What is this an example...
August 5, 2014 by Matt

Physics
A 10kg particle undergoes simple harmonic motion with an amplitude of 2.0mm, a maximum acceleration of 8.0x10^3 m/s^2, and an unknown phase constant (phi) What are: a.) the period of the motion b.) the maximum speed of the particle c.) total mechanical energy of the oscillator...
November 30, 2010 by Greg

Physics
Two blocks with masses m1 = 1.40 kg and m2 = 3.00 kg are connected by a massless string, as shown in the Figure. They are released from rest. The coefficent of kinetic friction between the upper block and the surface is 0.390.In the figure m1 is on top of a horizontal table ...
March 6, 2013 by Heidi

physics
need help with the following question. if earth has a mass of 6.0*10^24 kg and a radius 6.4*10^6 m: a) find the change in gravitational potential energy of a meteorite of mass 150 kg as it moves from an infinite distance to the earth's surface. b) with what speed does the ...
September 24, 2011 by rachel

physics
A winch is used to frag a 375 N crate up a ramp at a constant speed of 0.75 m/s by means of a rope that pulls parallel to surface of the ramp. The rope slopes at 33 deg. above the horizontal, and the coefficient of kinetic friction between the ramp and the crate is 0.25. (a) ...
October 24, 2011 by juniper

IPC
okayy sooo this matching thing is wierd.. i dont understand it.. Zeroth First Second -Heat can change energy from one form to another, but the amount of energy in the universe is constant. -Two objects in thermal equilibruim will have no net heat flow between them. -The ...
May 3, 2011 by Please help!!

Chemistry-Dr.Bob
An unknown piece of metal weighing 100. g is heated to 90.0 degrees Celcius. It is dropped into 250 g of water at 20.0 degrees Celcius. When equilibrium is reached, the temperature of both the water and piece of metal is 29.0 degrees Celcius. Determine the specific heat of the...
January 9, 2016 by Sanaya

physics
A girl coasts down a hill on a sled, reaching level ground at the bottom with a speed of 7.0 m/s. The coefficient of kinetic friction between the sleds runners and the hard, icy snow is 0.054, and the girl and sled together weigh 749 N. The acceleration of gravity is 9....
January 26, 2014 by Anonymous

physics
A girl coasts down a hill on a sled, reaching level ground at the bottom with a speed of 7.0 m/s. The coefficient of kinetic friction between the sleds runners and the hard, icy snow is 0.054, and the girl and sled together weigh 749 N. The acceleration of gravity is 9....
January 26, 2014 by christopher

physics
A girl coasts down a hill on a sled, reaching level ground at the bottom with a speed of 6.6 m/s. The coefficient of kinetic friction between the sled's runners and the hard, icy snow is 0.047, and the girl and sled together weigh 755 N. The acceleration of gravity is 9.81 m/s...
November 1, 2015 by luma

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