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An 8 Ohm speaker is connected across the output terminals of a power amplifier that delivers 72 W. What is the current supplied to the speaker (in A)?
A baseball with a mass of 0.14 kg is moving at +35 m/s. Calculate the momentum of the baseball
The sun radiates energy at the rate of approximately 3.80 x 1026 W. Calculate the sun's loss of mass per day
Suppose that an ion source in a mass spectrometer produces doubly ionized gold ions (Au2+), each with a mass of 3.27 × 10-25 kg. evaluate the radius of the path
two identical charges are fixed to diagonally opposite corners of a square 0.5m on the side. each charge is 3x10-9c how
A 4.0-kg object has a velocity of 4.0 m/s headed east. An explosion causes it to break up into two smaller 2.0-kg objects. what is the velocity of the other object after the explosion
A 1600 kg car traveling eastward at 32 m/s collides at an intersection with a 700 kg motorcycle traveling northward at 45 m/s. What is the direction of the car's velocity after the collision
A sealed cubical container 22.0 cm on a side contains three times Avogadro's number of molecules at a temperature of 20.0°C
A 50 kg ballet dancer stands on her toes during a performance with four square inches (26.0 cm2) in contact with the floor. What is the pressure exerted by the floor over the area of contact (a) if the dancer is stationary and (b) if dancer is lea..
a large point charge of q 50 microc creates an electric field and an electric potential all around it. a styrofoam
a battleship simultaneously fires two shells toward two identical enemy ships. one shell hits ship a which is close by
what are possible sources of error when doing and experiment to calculate shear force? basically in each trial a point
A car is driving directly north on the freeway at a speed of 114 km/h and a truck is leaving the freeway driving 92 km/h in a direction that is 30° west of north
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