Friday
October 31, 2014

Posts by Ame


Total # Posts: 16

Physics
A block of mass m = 2.00 kg is attached to a spring of force constant k = 5.15 102 N/m that lies on a horizontal frictionless surface as shown in the figure below. The block is pulled to a position xi = 5.75 cm to the right of equilibrium and released from rest. (a) Find the ...
December 6, 2012

Physics
A block of mass m = 2.00 kg is attached to a spring of force constant k = 5.15 102 N/m that lies on a horizontal frictionless surface as shown in the figure below. The block is pulled to a position xi = 5.75 cm to the right of equilibrium and released from rest. (a) Find the ...
December 6, 2012

Physics
The period of motion of an object-spring system is T = 0.474 s when an object of mass m = 296 g is attached to the spring. (a) Find the frequency of motion in hertz. _______Hz (b) Find the force constant of the spring. _______N/m (c) If the total energy of the oscillating ...
December 6, 2012

PHYSICS
A man enters a tall tower, needing to know its height. He notes that a long pendulum extends from the ceiling almost to the floor and that its period is 11.5 s. (a) How tall is the tower? _________ m (b) If this pendulum is taken to the Moon, where the free-fall acceleration ...
November 30, 2012

PHYSICS
Light waves are electromagnetic waves that travel at 3.00 108 m/s. The eye is most sensitive to light having a wavelength of 5.50 10-7 m. (a) Find the frequency of this light wave. __________ Hz (b) Find its period. _______________ s
November 30, 2012

PHYSICS
A bat can detect small objects, such as an insect, whose size is approximately equal to one wavelength of the sound the bat makes. If bats emit a chirp at a frequency of 8.31 104 Hz, and if the speed of sound in air is 343 m/s, what is the smallest insect a bat can detect? ...
November 30, 2012

PHYSICS
A spring is hung from a ceiling, and an object attached to its lower end stretches the spring by a distance d = 7.70 cm from its unstretched position when the system is in equilibrium as in the figure below. If the spring constant is 48.0 N/m, determine the mass of the object...
November 30, 2012

PHYSICS DUE SOON
Never mind I figured this one out. Thank you
November 29, 2012

PHYSICS DUE SOON
A 95.1-g ice cube is initially at 0.0°C. (b) What is the change in entropy of the environment in this process? ___________J/kg
November 29, 2012

PHYSICS DUE SOON
A Carnot engine operates between 170°C and 23°C. How much ice can the engine melt from its exhaust after it has done 4.5 104 J of work?
November 29, 2012

PHYSICS DUE SOON
In each cycle of its operation, a heat engine expels 6,100 J of energy and performs 1,300 J of mechanical work. (a) How much thermal energy must be added to the engine in each cycle?_____J (b) Find the thermal efficiency of the engine.____%
November 29, 2012

PHYSICS DUE SOON
(b) What is the change in its internal energy?
November 29, 2012

PHYSICS DUE SOON
A gas is compressed at a constant pressure of 0.800 atm from 6.00 L to 1.00 L. In the process, 380 J of energy leaves the gas by heat. ____J
November 29, 2012

PHYSICS DUE SOON
In a running event, a sprinter does 5.5 105 J of work and her internal energy decreases by 8.8 105 J. (a) Determine the heat transferred between her body and surroundings during this event. _____J
November 29, 2012

math
A weight attached to a spring is pulled down 4 inches below the equilibrium position. Assuming that the frequency of the system is 8/pi cycles per second, determine a trigonometric model that gives the position of the weight at time t seconds.
April 1, 2010

Chemistry Suspension Examples...
Haha, I was lookin for answers when I stumbled onto this. Thanks everyone for the help! Lol
June 15, 2005

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