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Acording to a rule of thumb, every 5 secondes between a lighting flash and a following thunder, gives the distance to the flashind miles. Assuming that the flash of light arrives in essentially no time at all, estimate the speed of sound in m/s from this rule.
A sensitive gravimeter at a mountain observatory finds that the free-fall acceleration is 5.5×10?3m/s2 less than that at sea level
An ideal transformer shown in the ?gure below has a primary with 45 turns and secondary with 18 turns. What is the reading of the ammeter
A hydrogen atom undergoes a transition from a 2p state to the 1s ground state. In the absence of a magnetic field, the energy of the photon emitted is 122nm. The atom is then placed in a strong magnetic field in the z-direction.
A spherical blackbody radiator has a temperature of 159°C. Its radius is 0.253 m. what is the net rate of energy radiated from the sphere?
A 2500mL- flask is initially open to air at 24 celsius and 1 atm pressure. How many moles escape when the air is released
assume a long, straight wire carries a current of 6.5 .what would be the frequency of vibrations.
the pressure of a gas contained in a cylinder with a movable piston is 450 pa 450 nm2. the area of the piston is 0.2
q1. a 170 g block hangs from a spring with spring constant 9.0 nm. at t0 s the block is 24 cm below an equilibrium
in order to drink from your glass you need to lift it to your mouth. if your glass in now 0.18kg and accelerates to
A bicyclist is finishing his repair of a flat tire when a friend rides by with a constant speed of 3.6 m/s. How much time does it take until he catches his friend
An oil drop carries one excess electron and weighs 9.3 x10-15 N. What electric field strength is needed to suspend the drop so it is motionless.
Give examples of two objects that have different positions but undergo identical displacements. Please give another or a couple of examples other than a group of choreographed stage dancers.
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