Tuesday
September 2, 2014

Posts by phys


Total # Posts: 26

physics
answer this please
March 19, 2014

science physics
wrong 0.84
June 17, 2013

science physics
A chicken decides to cross a road. The road is perfectly straight, runs north-south, and is full of cars driving by from south to north. The cars have a log-normal distribution for the distance between each car. However, the cars all travel at 80 km/hr. The chicken stands next...
June 17, 2013

physics
in an adiabatic expansion, it says that temperature decreases but volume increases, but if we look at PV=nRT, if T decreases, then shouldnt V decreases
April 27, 2010

physics
if the piston is in thermal equilibrium but the it is pushed inward, can there be a change in temperature(increase) even if Q=o
April 22, 2010

physics
if the temperature is increased, how do we determine volume and pressure since T is proportional to V and P but V and P are indirectly proportional to each other.
April 22, 2010

physics
when an impulse is given to a particle, momentum is transferred from an external agent to that particle. What do they mean by external agent what is really an impulse beside saying that its a change in momentum
April 20, 2010

physics
can anyone give an example of imperfect inelastic collision and how is it different from perfect inelastic. My teacher and the book didnt mention anything about imperfect one
April 16, 2010

physics
A 16.0 m uniform ladder weighing 480 N rests against a frictionless wall. The ladder makes a 61.0° angle with the horizontal. (a) Find the horizontal and vertical forces the ground exerts on the base of the ladder when an 840 N firefighter is 4.20 m from the bottom. i got ...
April 12, 2010

physics(I'm taking a different way to solve)
In the 1968 Olympic Games, University of Oregon jumper Dick Fosbury introduced a new technique of high jumping called the "Fosbury flop." It contributed to raising the world record by about 30 cm and is presently used by nearly every world-class jumper. In this ...
April 10, 2010

physics
A student proposes to measure the gravitational constant G by suspending two spherical objects from the ceiling of a tall cathedral and measuring the deflection of the cables from the vertical. Draw a free-body diagram of one of the objects. (Do this on paper. Your instructor ...
April 8, 2010

chemistry
can you tell me what i did wrong on this problem Rigid rods of negligible mass lying along the y axis connect three particles. The system rotates about the x axis with an angular speed of 3.30 rad/s. 4kg,y=3.00m 2kg,y=-2.00m 3kg,y=-4.00m a)Find the total rotational kinetic ...
April 8, 2010

chemistry(check my answer)
how do resonance structure related to its real structure? resonance structure is just another way to write the lewis dot with different formal charges and bond order
April 8, 2010

chemistry
how do we calculate bond order of a molecule that has 3 different elements, like for example C-N-O
April 8, 2010

chemistry(please clarify my thoughts)
for MO between C-S, is the sigma bond higher in energy than pie bond since it is applied to C.So when we do MO for C-S,do we use that rule in this as well
April 8, 2010

physics(check my answer)
can you tell me what i did wrong on this problem Rigid rods of negligible mass lying along the y axis connect three particles. The system rotates about the x axis with an angular speed of 3.30 rad/s. 4kg,y=3.00m 2kg,y=-2.00m 3kg,y=-4.00m a)Find the total rotational kinetic ...
April 6, 2010

chemistry(check my work)
when you said that you dont like answer B any more does that mean you are unsure about this
April 6, 2010

physics(check my work)
A 60.0 kg person bends his knees and then jumps straight up. After his feet leave the floor, his motion is unaffected by air resistance and his center of mass rises by a maximum of 14.9 cm. Model the floor as completely solid and motionless. a)With what momentum does the ...
April 3, 2010

chemistry(check my answer)
sorry i forgot add the question The freezing point of a solution is A. lower than the freezing point of the solvent alone because higher temperature is required to accelerate solvent molecular motion enough to overcome obstructon by solute particles.. B. higher than the ...
April 2, 2010

physics(help me with the angle)
In the 1968 Olympic Games, University of Oregon jumper Dick Fosbury introduced a new technique of high jumping called the "Fosbury flop." It contributed to raising the world record by about 30 cm and is presently used by nearly every world-class jumper. In this ...
April 1, 2010

chemistry(check my answer)
A. lower than the freezing point of the solvent alone because higher temperature is required to accelerate solvent molecular motion enough to overcome obstructon by solute particles.. B. higher than the freezing point of the solvent alone because higher temperature is required...
April 1, 2010

physics(check my answer)
A 60.0 kg person bends his knees and then jumps straight up. After his feet leave the floor, his motion is unaffected by air resistance and his center of mass rises by a maximum of 14.9 cm. Model the floor as completely solid and motionless. (a) Does the floor impart impulse ...
March 31, 2010

Phys
A soda can (r=3cm) rolling at 2 m/s to the right is stopped in 1 m. What is its angular acceleration? (a is constant)
November 20, 2008

Phys
Is the answer 30 radians?
November 20, 2008

Phys
A top starting from rest is spun for 3 seconds achieving an angular speed of 20 rad/s. How many radians has it gone through in this time? (a is constant)
November 20, 2008

Phys
A stationary 50 kg circular object (r0=.25m) is on a 30 degree incline. The coefficient of rolling friction between the block and the incline is 0.05. If it moves for 3 seconds, what is the angular displacement of the object at this time?
November 20, 2008

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