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4.40×10^23 nitrogen molecules collide with a 14.0cm^2 wall each second. Assume that the molecules all travel with a speed of 360m/s and strike the wall head on. What is the pressure on the wall?
A vibrating guitar string emits a tone simultaneously with one from a 500-Hz tuning fork. If a beat frequency of 5 Hz results, what is the frequency of vibration of the string
You are arguing over a cell phone while trailing an unmarked police car by 26.0 m; both your car and the police car aretraveling at 110 km/h. Your argument diverts your attention fromthe police car for 2.0 s (long enough for you to look at the pho..
You travel to an alien planet. The local population tries very hard to tell you what gravity is on the surface. You cannot understand them, and do not have a tool to calculate gravity directly. You also ran out of water. They offer a liquid to you, o..
A radioactive isotope has an activity of 9.32×104 Bq initially. After 3.55 hours the activity is 6.71×104 Bq. What is the half-life of the isotope?
a block mass 15.92kg supported by a vertical massless cable is initially at rest. The block is then pulled upward with a constant acceleration of 2.11m/s^2. what is the net force acting on the mass
A train at a constant 75 km/h moves east for 48 min, then in a direction 61.0° east of due north for 11min, and then west for 67 min.
An uncharged spherical conducting shell surrounds a point charge - q at its centre. Then a charge +3q is placed on the outside surface of shell.
A pendulum hangs from an inclined wall. Suppose that this pendulum is released at an initial angle of 10 degrees and it bounces off the wall elastically when it reaches an angle of -5 degrees
Determine the enthalpy change and internal energy change of ammonia in J/mole, as it is heated from 350 K to 600 K, using the ideal gas heat capacity given by the Shomate Equation.
You put a diode in a microelectronic circuit to protect the system in case an untrained person installs the battery backward. what would be the magnitude of the current in the diode
A photon of wavelength 0.45000nm strikes a free electron that is initially at rest, What is the speed of the recoil electron after the collision
A 2.9-kg block slides with a speed of 1.6m/s on a frictionless horizontal surface until it encounters a spring.(a)if the block compreses the spring 4.8cm before coming to rest,what is the force constant of the spring?(b)What initial speed should the..
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