# Posts by phys

Total # Posts: 26

physics

science physics
wrong 0.84

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...

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

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

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.

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

physics
can anyone give an example of imperfect inelastic collision and how is it different from perfect inelastic. My teacher and the book didn't mention anything about imperfect one

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 ...

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 ...

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 ...

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 ...

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

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

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

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 ...

chemistry(check my work)

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 ...

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 ...

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 ...

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...

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 ...

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)

Phys

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)

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?