Total # Posts: 53
Summation of Q = 0 Qsilver + Qice = 0 Qsilver = (mass of silver)(Csilver)(final temp - initial temp) Use Latent heat because ice transformed phase to water Qice = (mass of ice)(heat fusion of water) mass of silver * Csilver * (0-75) + mass of ice * heat fusion of water Isolate...
November 28, 2015
While flying at an altitude of 7.25 km, you look out the window at various objects on the ground. If your ability to distinguish two objects is limited only by diffraction, find the smallest separation between two objects on the ground that you can resolve as distinguishable. ...
October 15, 2015
triangle abc has sides that are 20 centimeters 38 centimeters and 50 centimeters in length . it is related to triangle cde by a scale factor of 0.5 what are the lengths of the sides of triangle CDE. I need help to figure this out. Thanks
May 25, 2015
Suppose that the weight (in pounds) of an airplane is a linear function of the total amount of fuel (in gallons) in its tank. When graphed, the function gives a line with a slope of 6.2. With 52 gallons of fuel in its tank, the airplane has a weight of 2222.4 pounds. What is ...
April 2, 2014
A satellite, LangSat, moves in circular orbit around the Earth at a speed of 4.95kms-1. (i) What is the altitude of the satellite (ii) Determine the period of the satellites orbit (iii) What is the value of the gravity, g, at the satellite. (iv) If another satellite, ...
September 2, 2013
A 20-g bullet is fired horizontally into a 980 g block of wood suspended by a long cord. The bullet sticks in the block and causes the block to swing 15 cm above its initial level. a) What is the momentum of the bullet before it hit the block? b) Determine the velocity of the ...
September 1, 2013
A student on a stool rotates freely at 180 rounds per minute. The student holds a 1.00 kg mass in each outstretched arm, 0.8 m from the axis of rotation. The combined moment of inertia of the student and the stool is 6.00 kgm2 which remains constant. How far should the student...
August 30, 2013
a) What do you understand by Simple Harmonic Motion? b) A simple harmonic motions is characterized by the equation x = (10 cm) sin (0.1t + ) where, x is in cm and t is in seconds Determine the i. amplitude and angular frequency. ii. linear frequency and period. iii. ...
August 27, 2013
Janet has been attending Killian High School for three years. At the beginning of her senior year, she enrolled in Ms. Brosham's English class. She heard from her two older siblings that Ms. Brosham was a hard-nosed, crusty teacher who did not tolerate uncertainty. After a...
November 20, 2012
Correct this passage,place all corrections in bold print and parthese. Why are great numbers of students choosing to pursue their college degrees using their home computers. Benjamin Franklin said; A penny saved is a penny earned. This principle applies to the American ...
November 7, 2010
I thank you for response. I do have some key points w/the information that I have. Just need to figure out the timeline from 1940's to 1950's. The reading that I have has the time line out of order. I just needed to know how to begin...Thanks
July 12, 2010
I need to do a power point on both questions that was previous posted. I don't know how to strat it off. can I start by saying how important it is to know history...Imma little lost
July 12, 2010
A beaker of mass mb containing oil of mass m1 and density ρ1 rests on a scale. A block of iron of mass m2 and density ρ2 is suspended from a spring scale and completely submerged in the oil. Determine the equilibrium readings of both scales. (Use rho_1 for ρ1, ...
November 16, 2009
gravitational, electromagnetic, and nuclear forces. 1. Why are these forces often called fundamental or basic forces? 2. Where are these forces found? 3. How are other forces related to them?
October 2, 2008
How much force is needed to accelerate a 50-kg rider and her 250-kg motorcycle at 5 m/s2? This is really a physics question. The equation that you use is Newton's second law, Force = Mass x Acceleration. In this case, the total mass being accelerated is 300 kg. Multiply ...
June 12, 2007