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An object with an average density of 920 kg/m3 floats in a pan containing 500 cm3 of water. Ethanol is added to the water until the object is just on the verge of sinking. Find what volume of ethanol has been added? (Disregard the loss of volume caused by mixing.) cm3
Three resistors, 27, 49, and 79 ?, are connected in series, and a 0.51-A current passes through them. What is the potential difference across the three resistors
what will a spring scale read for the weight of a 54- woman in an elevator that moves upward with constant speed 5.0 ?
A wave of amplitude 0.40 m interferes with a second wave of amplitude 0.3 m traveling in the same direction. (a) What is the largest resultant amplitude that can arise.
Two balls are released simultaneously from the top of a tall building. Ball A simply dropped with no initial velocity, and Ball B is thrown downward with and initial velocity of 12 m/s. How far has each ball dropped
An electron is confined to a region of space of the size of an atom (0.1 nm). What is the uncertainty in the momentum of the electron? What is the kinetic energy of an electron with a momentum equal to deltaP ?
one component of a magnetic field has a magnitude of 0.0262 t and points along the x axis while the other component has
A tank having a volume of 0.100 m3 contains helium gas at 135 atm. How many balloons can the tank blow up
A non-ideal battery has an EMF of 24.0V when no current is drawn and a terminal voltage of 22V when a 10.0? resistors is put in series with the battery. What is the internal resistance of the battery?
a load of 100lbs is applied to the lower end of a steel rod 3 ftlong and .20in in diameter. how much will the rod stretch
q1. a uniform solid ball rolls smoothly along a floor then up a ramp inclined at 20.4o. it momentarily stops while it
An electrically neutral thin, square metal slab, measuring 6.00cm on a side is placed in a uniform external field that is perpendicular to its square area. What is the total charge on the negative side of the slab
Two objects of masses m1=0.56 kg and m2=0.88 kg are placed on a horizontal frictionless surface and a compressed spring of spring constant k=280 N/m is placed between them. find the final velocity of each object
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