Saturday

September 20, 2014

September 20, 2014

Number of results: 86,945

**physics**

The driver of a 1024 kg truck traveling 32.6 m/s North on I-77 has to make a sudden stop. If it requires a distance of 57.1 m for the truck to stop, use conservation of energy to find the net force acting on the truck.
*November 18, 2009 by Cory*

**physics**

The driver of a 1024 kg truck traveling 32.6 m/s North on I-77 has to make a sudden stop. If it requires a distance of 57.1 m for the truck to stop, use conservation of energy to find the net force acting on the truck.
*December 9, 2009 by Sandy*

**Environmental Science**

What are renewable energy sources?
*September 12, 2007 by Patricia*

**Physical Science**

"Can energy be created/destroyed
*September 25, 2007 by Nneka*

**science**

i am not the definition of muscular energy plzz help.....
*November 10, 2007 by shikha*

**science**

a list of renewable energy resources
*March 9, 2008 by mary*

**physical science**

what are 2 types of potential energy?
*May 15, 2008 by leann*

**physical science**

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

**biology**

What are two disadvantages of nuclear energy?
*May 27, 2008 by carlie*

**science**

what is thermal energy plz help me stuck!
*January 29, 2009 by Alex*

**9th grade**

what are energy bar graphs?
*March 13, 2009 by shana*

**physics**

can pontential energy ever be negative?
*April 2, 2009 by cynthia*

**Science**

Where, in Nevada, is wind energy produced? THANKS!
*April 10, 2009 by Mariz*

**5th grade**

How does the suns energy travel?
*May 19, 2009 by Julia*

**science 275**

why conserving energy is important?
*June 14, 2009 by sam*

**Home economics**

What 2 units measure energy ?
*September 18, 2009 by Leagh*

**science**

what is the big idea of energy transfer
*November 28, 2009 by kiko*

**chemistry**

How does the spin of an electron affect its energy?
*November 28, 2009 by ana*

**science**

the flow of energy through a community is a ?
*December 1, 2009 by emma*

**chemistry**

Why does the total energy (Ke+Pe) decrease with height?
*December 6, 2009 by Maddie*

**Science**

WHat are advantages and disadvantages of solar energy?
*January 6, 2010 by Ramandeep *

**Biology**

What kind of energy do humans run on ?
*February 1, 2010 by Anonymous*

**science**

I need the definition of HEAT ENERGY.
*February 7, 2010 by bharati*

**physics**

what are some examples of sources of energy?
*February 11, 2010 by Natalia*

**science **

what is the flow of matter and energy is it waves
*April 16, 2010 by mary*

**science**

If water boils does it transmit energy
*April 20, 2010 by Anonymous*

**Physics**

What is the energy of a hydrogen atom with a 1.70 nm diameter?
*April 25, 2010 by MK*

**biology**

How does energy flow through the biosphere?
*May 19, 2010 by Olivia*

**science**

3 types of energy collected by telescopes
*August 25, 2010 by reagan*

**science **

definition of energy calculations of force
*October 10, 2010 by tuks*

**science**

should we use geothermal energy ?
*November 3, 2010 by hailey *

**6th grade**

how does geothermal energy work ?
*November 3, 2010 by hailey *

**chemistry**

calculate the energy of a wave that has a frequency of 3.5*10^8 m/s
*November 22, 2010 by linda*

**Chemistry**

what is the outer energy level for beryllium?
*November 30, 2010 by Sandy*

**chemistry**

what is the energy of a photon with the frequency of 3.5 x 10 delta 24 hz?
*December 17, 2010 by zahra*

**Chemistry**

How much energy does 3.52 * 10^-7m of light have?
*January 20, 2011 by Jennifer*

**chemistry**

what is activation energy for combustion of sawdust
*March 30, 2011 by christabel*

**chem**

what is a potential energy curve and how do you know where to label Ea, and ΄H??
*May 15, 2011 by Sara*

**physics**

if m is in kg, ag in m/s2, and h in metre, what is the unit of potential energy?
*August 23, 2011 by ivie*

**science**

What is the difference in Thermal Energy and Heat.
*October 24, 2011 by Anna*

**Science**

What is the source of energy in fossil fuels?
*November 2, 2011 by Bob*

**Science**

What are they asking in this question? Which is an alternative source of energy?
*November 8, 2011 by Bob*

**physics**

the differences between work and energy??
*November 27, 2011 by west*

**chemistry **

what is the energy in joules of one quantum of 55.4 nm
*February 4, 2012 by Anonymous*

**SCIENCE**

FOOD & HEALTH SOURCE & ENERGY
*May 25, 2012 by SS*

**PHSC**

Which part of a wave relates to its energy ?
*July 5, 2012 by brandy*

**physics**

Which part of a wave relates to its energy ?
*July 5, 2012 by brandy*

**chemistry**

What is the wavelength of a photon that has an energy of E = 4.01Χ10^-19J ?
*July 7, 2012 by Larry*

**science**

heat energy is measured in unites of
*August 25, 2012 by diane*

**Science **

What's a benefit and risk of nuclear energy?
*January 16, 2013 by Cassidy*

**chemistry**

Calculate the wavelength of a photon with energy 2.45 eV.
*February 25, 2013 by adex*

**chemistry**

Calculate the wavelength of a proton with energy 2.45 eV.
*February 25, 2013 by adex*

**science**

what are the changes of statein which energy is increased
*April 28, 2013 by jj*

**social studies**

What is the responsibility's of the department of energy
*May 28, 2013 by Hannah*

**Chemistry**

Calculate the wavelength of a proton with energy 2.45 eV.
*September 15, 2013 by Anon*

**physics**

what are imp. l/q of unit 6 (work and energy)
*September 24, 2013 by hamza*

**Science**

What equipment is necessary for wind energy?
*January 9, 2014 by Anonymous*

**physics**

what forms of energy does pendulm have/
*February 16, 2014 by uk girl*

**physics**

An object of mass M = 4 kg slides from rest a distance d = 2 m down a frictionless inclined plane where it encounters a spring. It compresses the spring a distance D = 1.2 m before stopping. The inclined plane makes an angle q = 20° with the horizontal. a) When the block just ...
*March 11, 2012 by Mel*

**Science**

5. Which of the following types of pollution cannot be attributed to car and truck emissions? A. acid rain B. sedimentation C. ozone D. photochemical smog 6. Which of the following is a source of photochemical smog? A. fossil fuels B. wind energy C. biomass fuels D. nuclear ...
*March 20, 2014 by Anonymous*

**Desperate need of Help for Physics.**

Moment of inertia of a flywheel disk question: Do you think the calculated moment of inertia is larger or smaller than the "true" moment of inertial of the actual disk? question: calculate the percent difference between the static and the dynamic moment. I got .0195kgm^2 for ...
*November 15, 2006 by Teesha*

**Physics**

Suppose the skin temperature of a naked person is 34°C when the person is standing inside a room whose temperature is 25°C. The skin area of the individual is 2.0 m2 a) Assuming the emissivity is 0.80, find the net loss of radiant power from the body b) Determine the number of...
*April 18, 2007 by papito Urgent help needed*

**math**

PLEASE!!!!i need help on these 4: *4y=15-3x 2y=3x+21 *4x=5y-14 y=-6x-9 *5x=4y-30 2x=3y=-12 *2/3y=10+4x 5x=1/3y-8 use linear combinations to solve the system of linear equations thank you!!!
*January 24, 2011 by HELP me please asap!!*

**math**

PLEASE!!!!i need help on these 4: *4y=15-3x 2y=3x+21 *4x=5y-14 y=-6x-9 *5x=4y-30 2x=3y=-12 *2/3y=10+4x 5x=1/3y-8 use linear combinations to solve the system of linear equations thank you!!!
*January 24, 2011 by HELP me please asap!!*

**linear equation**

For the following linear inequalities draw the feasibile region i: x _>1 ii: x+y _<2 iii: x-axis
*February 27, 2011 by winning*

**physics**

two crates, of mass 75 kg and 113 kg, are in contact and at rest on a horizontal surface. A 727 N force is exerted on the 75 kg crate. If the coefficient of kinetic friction is 0.15, calculate the following: a)the acceleration of the system b) the force that each crate exerts ...
*November 22, 2010 by Haley*

**physics**

Two boxes of fruit on a frictionless horizontal surface are connected by a light string as in the figures below, where m1 = 10 kg and m2 = 19 kg. A force of 46 N is applied to the 19 kg box. Repeat the problem for the case where the coefficient of kinetic friction between each...
*October 4, 2012 by Anonymous*

**chemistry**

Use the kinetic molecular theory of gases to explain each of the following: a. a container of nonstick cooking spray explodes when thrown into a fire. b. the air in a hot-air balloon is heated to make the balloon rise.
*November 10, 2012 by Boo Boo*

**physics**

a truck of mass 8500Kg is pulling a trailer of mass 27 000Kg on a level road.The coefficient of kinetic friction is 0,20.A horizontal force of 75 000N moves the truck forward.question:calculate the magnitude of the acceleration of the system
*March 3, 2014 by Bheki*

**physics**

The three objects in the drawing are connected by strings that pass over massless and friction-free pulleys. The objects move, and the coefficient of kinetic friction between the middle object and the surface of the table is 0.100. (Assume m1 = 12.2 kg and m2 = 26.0 kg.)
*May 27, 2014 by twill*

**Math**

What similarities and differences do you see between functions and linear equations studied in Ch. 3? Are all linear equations functions? Is there an instance in which a linear equation is not a function? Support your answer. Create an equation of a nonlinear function and ...
*September 28, 2009 by Toni*

**math**

What similarities and differences do you see between functions and linear equations studied in Ch. 3? Are all linear equations functions? Is there an instance in which a linear equation is not a function? Support your answer. Create an equation of a nonlinear function and ...
*October 27, 2009 by tye*

**math**

What similarities and differences do you see between functions and linear equations studied in Ch. 3? Are all linear equations functions? Is there an instance when a linear equation is not a function? Support your answer. Create an equation of a nonlinear function and provide ...
*October 5, 2010 by afrika*

**Physics**

A ball is falling through the air. It has just two forces acting on it, its weight and air resistance. Which of the following statements is true? a. There are only conservative forces acting on the ball. b. There are only nonconservative forces acting on the ball. c. There are...
*December 12, 2011 by Sarah*

**physics**

A revolutionary new diet advertises that one can lose weight simply by eating ice. When one eats ice,chemical energy in the body is used to melt the ice and then raise the temperature of the melted ice to the temperature of the body, 37 degrees Celsius.Past scientific studies ...
*January 22, 2011 by jenny*

**physicis**

A 8.30 kg object with a speed of 34.0 m/s strikes a steel plate at an angle of 45.0 degrees with the normal to the plate, and rebounds at the same speed and angle on the other side of the normal. What is the change (in magnitude only) of the linear momentum of the object (in ...
*April 23, 2013 by PCm*

**physics**

A 8.30 kg object with a speed of 34.0 m/s strikes a steel plate at an angle of 45.0 degrees with the normal to the plate, and rebounds at the same speed and angle on the other side of the normal. What is the change (in magnitude only) of the linear momentum of the object (in ...
*April 24, 2013 by Help!!!*

**physics**

A 4.8 kg block is pushed along the ceiling with a constant applied force of 87 N that acts at an angle of 55.0° with the horizontal, as in Figure 4-33. The block accelerates to the right at 6.00 m/s2. Determine the coefficient of kinetic friction between the block and the ...
*December 5, 2010 by Corey*

**physics**

What is the minimum downward force on the box ( m=30 kg)that will keep it from slipping? The coefficients of static and kinetic friction between the box and the floor are 0.40 and 0.30, respectively.One person is pulling the box forward with a force of 125 N.
*December 7, 2010 by vinu*

**physics**

a 160g hockey puck slides horizontally along the ice, and the coefficient of kinetic friction between puck and ice is 0.15. if the puck starts sliding at 3 m/s before it comes to a stop it travels 3.6m how do you get to this answer?
*October 28, 2011 by annie*

**Physics**

A 4.4 kg block is pushed along the ceiling with a constant applied force of 89 N that acts at an angle of 55.0° with the horizontal, as in Figure 4-33. The block accelerates to the right at 6.00 m/s2. Determine the coefficient of kinetic friction between the block and the ...
*December 2, 2011 by Kashawn*

**graphics**

other than speed of production, what are two advantages of CAG (computer aided graphics) over manual methods? Thank you for using the Jiskha Homework Help Forum. Because it is faster, it is more energy conscious and leads to more profitability. In addition, computer graphics ...
*March 13, 2007 by chelsea*

**physics**

Object A has a gravitational potential energy of 24 joules when it rests on a shelf 5 m above the ground. Object B has a mass that is three times the mass of Object A. What would be the gravitational potential energy of object B when it rests on a shelf 10 m above the ground...
*October 22, 2009 by roxy*

**physics**

A 1.8 kg object is pulled along the floor with a force of 7.0 N acting horizontally. If the object accelerates at 2.4m/s^2, how much kinetic friction is acting? how do i do this? could you please explain step by step
*December 3, 2009 by kerri*

**physics**

The coefficient of kinetic friction between a refrigerator (mass 93 kg) and the floor is 0.12, and the coefficient of static friction is 0.35. If you apply the minimum force needed to get the refrigerator to move, what will the acceleration then be?
*September 29, 2010 by jerr *******

**Physics**

A pure copper penny is slid along a steel counter top. If the coefficient of kinetic friction between the copper and the steel is 0.36, what is the magnitude of the penny's acceleration?
*October 19, 2011 by Sammy*

**physics**

A 1.5-kg cart is pulled with a force of 7.3 N at an angle of 40° above the horizontal. If a kinetic friction force of 3.2 N acts against the motion, the carts acceleration along the horizontal surface will be
*November 12, 2011 by joe*

**physics**

A box slides down a 33.3 ◦ ramp with an acceleration of 1.07 m/s 2 . The acceleration of gravity is 9.8 m/s 2 . Determine the coeﬃcient of kinetic friction between the box and the ramp.
*December 6, 2012 by Anonymous*

**PHYSICS**

A 7 kilogram bowling ball is dropped from a fourth story window. If each story is 3 meters high, use energy conservation (not the equations of motion) to find the ball's velocity when it strikes the ground. Ignore air resistance. Thank you
*February 23, 2012 by GRISSELL*

**PHYSICS**

A 7 kilogram bowling ball is dropped from a fourth story window. If each story is 3 meters high, use energy conservation (not the equations of motion) to find the ball's velocity when it strikes the ground. Ignore air resistance.
*February 26, 2012 by TRACY*

**Physics**

A weight lifter manages to lift a 147 kg weight a distance of 1.1 m. Treat her as a thermodynamic system and find how much heat (in kcal) she must put out if her internal energy decreases by 3620 J during the lift.
*January 31, 2014 by Riley *

**Math 116**

What similarities and differances do you see between functions and linear equations studied in Ch.3? are all linear equations functions? is there an instance when a linear equation is not a function? support your answer. create an equation of a nonlinear function and provide ...
*July 18, 2008 by Sam*

**mechanics**

A wad of sticky clay of massmand velocity vi is fired at a solid cylinder of massM and radius R. The cylinder is initially at rest and is mounted on a fixed horizontal axle that runs through the center of mass. The line of motion of the projectile is perpendicular to the axle ...
*December 9, 2010 by sana*

**Algebra HELP**

USE LINEAR COMBINATIONS TO SOLVE THE SYSTEM OF LINEAR EQUATIONS (please show steps) 1) -X+8Y=16 2) 4X+5Y=-2 3)4Y=15-3X 3X+4Y=36 5X-4Y=-23 2Y=3X+21
*December 13, 2007 by electra*

**Math**

What are some key words when choosing whether to use a linear equation or a linear inequality?
*August 24, 2009 by Terilee*

**algebra**

what similarities and differences are there between functions and linear equations? Is there an instance when a linear equation is not a function?
*April 12, 2010 by nala*

**maths**

use the substitution method to solve the linear system. 1. 3x=9 -x+2y=9 3x/3 = 9/3 x = 3 -x(3)+2y = 9 -3+2y = 9 2y = 12 y = 6 is (3,6) correct? =========== also, can you please tell me how to solve these? use the linear combinations to solve the linear system: 2.x+y=3 x+2y=6 3...
*November 17, 2009 by jenn*

**Algebra**

linear equations is it a linear equation? 3x=5y i got yes since 0=5y-3x
*October 2, 2008 by Alejandro*

**linear equations**

What is the solution to the linear system 4x + 2y = 56 and 3x 6y = 33?Question 3 options: (9, 10) (9, 10) (9, 10) (9, 10)
*January 5, 2011 by alli*

**Math**

Express the non linear equation in its linear form; y=nx^(1/2)+kx
*February 17, 2013 by azmeerahim*

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