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April 19, 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: 106,378

physics
Find the wavelength (in nm) of a photon whose energy is 5.90 x 10-19 J. I understand that I have to use this equation to figure out the problem E=nhf, I just keep getting the wrong answer. Which is 33.68 nm
July 21, 2012 by Beth

Chemistry
Use standard enthalpies of formation to determine ΔHorxnfor: 3NO2(g) + H2O(l) → 2HNO3(aq) + NO(g) -133.5 = Delta H Find the change in internal energy for this reactioion.. ???? In KJ
February 27, 2014 by Steve

physics
A freight company uses a compressed spring to shoot 2.00 kg packages up a 1.00-m -high frictionless ramp into a truck, as the figure shows. The spring constant is 481 N/m and the spring is compressed 30.0 cm . A. What is the speed of the package when it reaches the truck? B. A...
November 13, 2010 by Anonymous

physics
A cannon fires a shell at an angle of 55.0° above the horizontal. The shell has a mass of 17.5 kg, and its initial speed as it leaves the cannon is 289 m/s. The cannon is not anchored to the ground. It is mounted on a base—a large block of wood—which is sitting on a level ...
November 1, 2010 by becca

Physics
1) A circular disk 0.20m in diameter starts from rest and accelerates with constant angular acceleration to an angular acceleration to an angular velocity of 210 rad/s in 10.00s. Find the angular acceleration and the angle which the disk has turned in degrees. 2) A car with ...
April 9, 2013 by Anonymous

physics
The uniform solid block in Fig. 11-36 has a mass of M = 5.60 kg and edge lengths a = 17.5 cm, b = 39.5 cm, and c = 2.85 cm. Calculate its rotational inertia about an axis through one corner and perpendicular to the large faces I know you have to find the center of mass to get ...
January 18, 2011 by almost there

Physics
I really need help with only this two problems. 1. A 6.0 kh block, sliding to the east across a horizontal, frictionless surface with a momentum of 30 kg*m/s^, strikes an obstacle. The obstacle exerts an impluse of 10 N*s to the west on the book. The speed of the block after ...
February 2, 2010 by Priscilla

physics
Two Bals. of masses mA = 45 grams and mB = 65 grams are suspended as shown. The lighter ball is pulled away to a 66 degree angle with the vertical and released: ----------------------------- /| | - /č| | | / | | | 30 cm / | | | mA | | | mA mB - where č = 66 degrees, and the ...
April 9, 2013 by SC

Physics
Two masses Ma= 2.0 and Mb= 5.0 are on inclines and are connected together by a string as shown in the figure(Figure 1) . The coefficient of kinetic friction between each mass and its incline is u= 0.30. If Ma moves up, and Mb moves down, determine their acceleration.
June 29, 2012 by Truman

odu
A toboggan approaches a snowy hill moving at 12.9 . The coefficients of static and kinetic friction between the snow and the toboggan are 0.390 and 0.290, respectively, and the hill slopes upward at 44.0 above the horizontal.
October 11, 2012 by ty

Physics
An object (mass 3.2kg ) slides upward on a vertical wall at constant velocity when a force F of 54N acts on it at an angle of 60∘ to the horizontal. N = 27 N Determine the force of kinetic friction on the object.
October 3, 2013 by Cheech

physics
A bicyclist traveling at 8 m/s rides around an unbanked curve. The coefficient of friction (is this static or kinetic friction?) between the tires and the road is 0.42. What is the radius of the shortest turn that the bicyclist can safely make?
November 11, 2013 by Liz

PLEASE HELP! SCIENCE
The system of blocks shown in the diagram below is being accelerated to the right at 4.4 m/s2 What is the applied force Small box mass- 0.10 kg Big box mass - 0.20 kg Acceleration - 4.4 m/s2 Coefficient kinetic - 0.35
October 26, 2014 by Rosie

physics
A contestant in a winter games event pushes a 41.0 kg block of ice in the positive direction across a frozen lake as shown in the Figure (a). The coefficient of static friction is 0.1 and the coefficient of kinetic friction is 0.03.
December 7, 2014 by mathew

physics
1.A truck with a mass 5000 kg is heading East at 20 m/s. Meanwhile a car with a mass 2500 kg is heading North at 30 m/s. The two vehicles collide at an intersection, get stuck together, and the wreckage keeps moving to some direction.find the speed of the wreckage and the ...
July 8, 2008 by Sandhya

science
Hi, this question was posted by liverpool I see but has not been responded to after 2nd entry each time. What happens when a candle is alight. Having to show chemical/physical change. The question is 'Explained both changes using the Big Idea of Energy'? Can someone explain ...
October 22, 2006 by melody

11th grade
a spring with a spring constant of 4 newtons per meter is compressed by a force of 1.2 newtons. what is the total elastic potential energy stored in this compressed spring
April 13, 2010 by Anonymous

physics
a horizontal force of 95 N is applied to 60 kg crate on rough , level surface. if crate accelerates at 1.20 m/s2 , what is magnitude of the force of kinetic friction acting on the crate?
February 28, 2010 by jerry

Physics
A 10 kg penguin slips down a rough incline of 35o . If the coefficient of kinetic friction between the penguin and the incline is 0.15, determine the penguin’s acceleration.
November 20, 2013 by Angie

Physics
A 45kg block slides down an incline that is angled at 41 degrees. If the coefficient of kinetic friction between the block and the incline is 0.45 what is the block's acceleration?
February 19, 2014 by Taylor

Physics
A sled weighing 60 N is pulled horizontally across snow so that the coefficient of kinetic friction between the sled and the snow is 0.100. A penguin weighing 70 N rides on the sled. If the coefficient of static friction between the penguin and the sled is 0.700, find the ...
December 6, 2006 by Armando

Physics
Block 1, with mass m1 and speed 4.5 m/s, slides along an x axis on a frictionless floor and then undergoes a one-dimensional elastic collision with stationary block 2, with mass m2 = 0.41m1. The two blocks then slide into a region where the coefficient of kinetic friction is 0...
November 1, 2011 by Ashley

Math
A particle P of mass m=1 moves on the x-axis under the force field F=36/(x^3) - 9/(x^2) (x>0). Show that each motion of P consists of either (i) a periodic oscillation between two extreme points, or (ii) an unbounded motion with one extreme point, depending on the value of ...
April 26, 2011 by Daphine

Physics
A 10 kg sled slides down a hill with an incline of 30 degrees above the horizontal. Because of friction, it maintains a constant speed. For every meter that is traveled, how much energy (in joules) does the sled lose? I say 98 sin(30) Joules?
March 11, 2009 by Harold

physics
A block of mass = 0.85 kg is connected to a spring of force constant = 775N/m on a smooth, horizontal surface. 1) Plot the potential energy of the spring from = -5.00 cm to = 5.00 cm. 2) Determine the turning points of the block if its speed at x = 0 is 1.1 m/s I am so stumped...
October 16, 2011 by leeece

physics
A block of mass = 0.85 kg is connected to a spring of force constant = 775N/m on a smooth, horizontal surface. 1) Plot the potential energy of the spring from = -5.00 cm to = 5.00 cm. 2) Determine the turning points of the block if its speed at x = 0 is 1.1 m/s I am so stumped...
October 16, 2011 by leeece

physics
A blow-dryer and a vacuum cleaner each operate with a voltage of 120 V. The current rating of the blow-dryer is 12 A, and that of the vacuum cleaner is 5.5 A. Determine the power consumed by the blow-dryer. Determine the power consumed by the vacuum cleaner. Determine the ...
January 24, 2011 by Anonymous

physics
A 49.7-cm diameter disk rotates with a constant angular acceleration of 2.7 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.
October 23, 2010 by Anonymous

Physics
A compact disk rotates from rest to 500 rev/min. in 5.5s. a) What is the angular acceleration assuming it is constant. b) How many revolutions does the disk make in 5.5 s. c) How far does a point on the rim 6 cm from the center of the disk traveling during the 5.5 s.
April 4, 2013 by Jenny

Physics
1.A 24 kg crate initially at rest on a horizon floor requires a 75 N horizontal force to set it in motion, once the crate is in motion, a horizontal force 53 N keeps the crate moving with a constant velocity. Find the coefficient of kinetic friction, between the floor and crate.
October 19, 2009 by Bob

physcs
A potter's wheel having a radius 0.55 m and a moment of inertia 11.6 kg·m2 is rotating freely at 55 rev/min. The potter can stop the wheel in 8.0 s by pressing a wet rag against the rim and exerting a radially inward force of 66 N. Find the effective coefficient of kinetic ...
April 17, 2010 by Kelsey

Biology
Which compound has the highest free energy and produces the most ATP when oxidized? A. acetyl CoA B. glucose C. pyruvate D. carbon E. both pyruvate and carbon I've spent the past hour looking for this answer within my textbook or through Google searches. I can't seem to locate...
September 29, 2009 by Rich

Chem
I have a question about maximum energy and maximum entropy. How would you know whether the tendency towards maximum energy favours to reactants or the products. Secondly, how would you know whether the tendency towards maximum entropy favours the reactants or products?
April 15, 2009 by Lena

Science
Is Nuclear energy man-made or natural and HOW? Nuclear energy used to make electricity is not natural but man made. HOW. That's a long long story. Here is a site that should help get you started. Post with more specific questions after you have studied this. http://www....
December 19, 2006 by Jenna

Chemistry
1.How much energy is emitted by 1 mol of sodium ions emitting light at this wavelength? Answer in units of kJ. This is what I did for this problem, but my answer is wrong 45.8 mg = 0.0458 g 0.0458 g / (23.0 g/mol) = 0.001991 mol Na 0.001991 mol x (6.02214 x 10^23) = 1.199 x 10...
February 13, 2015 by Anna

Physics
A solid disk rotates in the horizontal plane at an angular velocity of 0.034 rad/s with respect to an axis perpendicular to the disk at its center. The moment of inertia of the disk is 0.11 kg·m2. From above, sand is dropped straight down onto this rotating disk, so that a ...
August 16, 2011 by Kristi

Physics
A solid disk rotates in the horizontal plane at an angular velocity of 0.036 rad/s with respect to an axis perpendicular to the disk at its center. The moment of inertia of the disk is 0.17 kg · m2. From above, sand is dropped straight down onto this rotating disk, so that a ...
November 1, 2011 by jason

physics
A solid disk rotates in the horizontal plane at an angular velocity of 0.040 rad/s with respect to an axis perpendicular to the disk at its center. The moment of inertia of the disk is 0.13 kg·m2. From above, sand is dropped straight down onto this rotating disk, so that a ...
November 16, 2014 by bob

physics
Two balls of equal mass collide and stick together as shown in the figure. The initial velocity of ball B is twice that of ball A. (Take č = 34°.) (a) Calculate the angle above the horizontal of the motion of mass A + B after the collision. 1 Units are required for this answer...
February 25, 2011 by important

Physics
A 0.70 kg mass at the end of a spring vibrates 4.0 times per second with an amplitude of 0.15 m. Determine the velocity when it passes the equilibrium point. Determine the velocity when it is 0.11 from equilibrium. Determine the total energy of the system.
December 2, 2010 by Eden

AP physics
a 5.7 kg ball rolls over the edge of a 4.4 m tall cliff. If the total mechanical energy of the ball is 890 j at the instant that it goes over the edge, how fast is the ball moving? Not sure how to get V when you know TME.
October 18, 2011 by James

Physics (Energy and Momentum)
A 4400 kg rocket is set for vertical firing. If the exhaust speed is 1500 m/s, at what rate (in kilograms/second) must the gas be ejected to supply the thrust needed to give the rocket an initial upward acceleration of 23.0 m/s^2? Not sure where to start.
April 17, 2012 by Andrew

Physics
A 2.0kg wood block is launched up a wooden ramp that is inclined at a 26 angle. The block's initial speed is 8.0 m/s. The coefficient of kinetic friction of wood on wood is 0.200. a) What vertical height does the block reach above its starting point? Express your answer to two...
October 10, 2012 by senko

Physics
A 0.50-kg mass at the end of a spring vibrates 3.0 times per second with an amplitude of 0.15 m. Determine (a) the velocity when it passes the equilibrium point, (b) the velocity when it is 0.10 m from equilibrium, (c) the total energy of the system, and (d) the equation ...
May 28, 2010 by Amber

Physics
A .6-kg mass at the end of a spring vibrates 3.0 times per second with an amplitude of .13 m. Determine a.) the velocity when it passes the equilibrium point, b.) the velocity when it is .1 m from equilibrium. c.) the total energy of the system, and d.) the equation describing...
July 17, 2010 by Stephanie

Science
How does energy and matter relate?
September 5, 2007 by Rosa

Science
How Does Heat Energy Travel?
October 16, 2007 by Louise

Science
WHat is "Massive Energy Structures"
November 29, 2007 by Leshay

science
how is light formed by energy?
March 10, 2008 by Ashley

ENERGY
WHAT HAPPEN WHEN A CANLE IS AIGHT
March 12, 2008 by AMBER

physics
what is the energy of motion called?
May 15, 2008 by leann

Physics
What is the energy of this type of radiation: 6.32 x 10^20 s^-1 ?
September 9, 2008 by Olivia

chemistry
what is the 'big idea of energy'???!
September 26, 2008 by -

science
what are 3 changes light energy can cause
September 29, 2008 by faejin

science
What is the Pro's and Con's of energy
October 2, 2008 by dani

Chemistry
what is the big idea of energy
November 8, 2008 by Chinchilla

science
what are 3 sources of heat energy
November 17, 2008 by shaeny

chemistry
what is the big idea of energy?
November 29, 2008 by john

6th grade
How is energy transported????
December 15, 2008 by Anonymous

7th grade
how do you know when something has energy?
April 15, 2009 by hanna

Science
What is an energy production pyramid??
September 9, 2009 by Elizabeth

5th grade
What is the definition of energy???
October 4, 2009 by Anonymous

science
How does a sunflower's energy get transferred?
January 4, 2010 by Lacey

science
where does activation energy come from
January 13, 2010 by dee

physics
what are nonrenewable energy sources?
February 11, 2010 by Natalia

science
how will ocean energy be used
February 22, 2010 by Anonymous

Science
Where does the energy go when you melt chocolate?
March 14, 2010 by Robert

science
what is the flow of matter and energy??
April 17, 2010 by suzzy

physics
As wavelength decreases, energy ?
July 31, 2010 by Cristina

chemistry
Properties of light energy
December 30, 2010 by Evans

modern physics
What is the energy equivalent of 2 e V?
April 28, 2011 by ashley --

science
HOW DOES ENERGY TRANSFER HAPPEN
November 15, 2011 by LINDSEY

science
HOW DOES ENERGY TRANSFER HAPPEN
November 15, 2011 by LINDSEY

science
HOW DOES ENERGY TRANSFER HAPPEN
November 15, 2011 by LINDSEY

physics
How does tidal energy work
February 15, 2012 by sathwika

physics
how do you solve for Potential Energy?
May 10, 2012 by dan

Physic
What is the source of the sun's energy?
August 7, 2012 by David

science
where does the earth loose energy to ??
October 17, 2012 by destiny

physics
The SI unit of energy can be expresses as what?
December 4, 2012 by elaine

heat energy
help me convert 0.093cal/g¤c to j/kg/k
March 20, 2013 by sophie

Physics
a) The coefficient of kinetic friction between a steel block and an ice rink surface is 0.0100. If a force of 24.5 N keeps the steel block moving at a steady speed, what is the force of gravity on the block? b)A copper block has dimensions 1 cm × 2 cm × 4 cm. A force of 0.10 N...
September 29, 2012 by Hanu

physics
You drop a ball from a height of 1.9m , and it bounces back to a height of 1.3m . a)What fraction of its initial energy is lost during the bounce? b)What is the ball's speed just before the bounce?
October 11, 2012 by Andrew

Physics
I am stuck on this question and not really sure what to do for it. I think that i can use this equation Q/dt=e*sigma*A*T^4 for it, but i'm not getting the right answer for it. Is this not the right equation? Question: Electronics and inhabitants of the International Space ...
April 5, 2011 by Eliz

Physics
A cannon fires a shell at an angle of 55.0 above the horizontal. The shell has a mass of 17.5kg, and its initial speed as it leaves the cannon is 289m/s. The cannon is not anchored to the ground. It is mounted on a base -a large block of wood- which is sittin go n a level ...
November 2, 2009 by John

Physics
A 5 kg block is being pulled to the right with a 20 N force. This causes the block to slide along the table with an acceleration of 2 m/s2. What is the coefficient of kinetic friction between the block and table?
February 21, 2011 by Paige

Physics
When a horizontal force of 350 is applied to a 86.0 box, the box slides on a level floor, opposed by a force of kinetic friction of 130 .What is the magnitude of the acceleration of the box?
May 25, 2011 by EL

Physics
A 4 kg block slides down a rough inclined plane inclined at 30° with the horizontal. Determine the coefficient of kinetic friction between the block and the surface if the block has an acceleration of 1.2 m/s2.
September 30, 2012 by La La

Physics
A 4 kg block slides down a rough inclined plane inclined at 30° with the horizontal. Determine the coefficient of kinetic friction between the block and the surface if the block has an acceleration of 1.2 m/s2.
October 6, 2012 by La La

physics
A toboggan slides down a hill and has a constant velocity. The angle of the hill is 6.50° with respect to the horizontal. What is the coefficient of kinetic friction between the surface of the hill and the toboggan?
June 30, 2013 by francis

physics
A toboggan slides down a hill and has a constant velocity. The angle of the hill is 6.70° with respect to the horizontal. What is the coefficient of kinetic friction between the surface of the hill and the toboggan?
September 23, 2014 by chidera

physics
You push a box along the floor against a constant force of friction. When you push with a horizontal force of 75 N the acceleration of the box is 0.55 m/s2; when you increase the force to 85 N the acceleration is 0.78 m/s2. (a) Find the mass of the box. kg (b) Find the ...
February 13, 2010 by janie

Physics
You push a box along the floor against a constant force of friction. When you push with a horizontal force of 72 N the acceleration of the box is 0.43 m/s2; when you increase the force to 77 N the acceleration is 0.58 m/s2. (a) Find the mass of the box. (b) Find the ...
February 15, 2010 by Bobby C

Physics
You push a box along the floor against a constant force of friction. When you push with a horizontal force of 78 N the acceleration of the box is 0.46 m/s2; when you increase the force to 86 N the acceleration is 0.76 m/s2. (a) Find the mass of the box. (b) Find the ...
February 12, 2012 by Anna

College Physics
1. A spring gun is made by compressing a spring ina tube and then altching the spring at the compressed position. A 4.97-g pellet is placed against the compressed and latched spring. The spring latches at a compression of 4.06 cm, and it takes a force of 9.12 N to compress the...
June 29, 2011 by Jane

physics
A 1,040-N crate is being pushed across a level floor at a constant speed by a force of 350 N at an angle of 20.0° below the horizontal; (a) What is the coefficient of kinetic friction between the crate and the floor? (b) If the 350-N force is instead pulling the block at an ...
March 15, 2012 by kevin

Science check
I was wondering if someone could check the problems for me? Thanks I can go back and show work if needed..this was just easier to type out. 1)An object has a mass of 615 grams and a volume of 105cm3.What is the density of the object? answer 5.86 gm/cm3 2) A player uses a ...
May 29, 2007 by Anonymous

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

Precalculus
Can someone check my answers please? Thank you :) 30. What is Earth's rotational speed at (a) Bangor, Maine (latitude 45 degrees N) and (b) Rio de Janeiro, Brazil (latitude 23 degrees S)? (It's given in the problem also that Earth's rotational speed at the equator is about 1,...
January 13, 2010 by Emily

Fossil Fuels
If we ran out of fossil fuels which could replace them. Hydroelectric Wind Solar GeoThermal No single one of these resouces, at their current levels, could totally replace out energy consumption. Hydroelectric yeah but which could almost do it None of these. To even come close...
November 15, 2006 by Jenny

physics
If I push a 10kg box with 50.0N of force forward and the box has a coefficient of kinetic friction of .25 what is the forward acceleration of the box?
November 29, 2009 by april

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