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A student drops two metallic objects into a 120 g steel container holding 150 g of water at 25°C. One object is a 230 g cube of copper that is initially at 85°C, and the other is a chunk of aluminium that is initially at 5.0°C. To the surprise of the student, the water reaches a final temperature of 25°C, exactly where it started. What is the mass of the aluminium chunk?
the security alarm on a parked car goes off and produces a frequency of 1220 Hz. The speed of sound is 343 m/s. At what speed are you driving
question1consider an array of parallel wires with uniform spacing of 1.30 cm between centers. in air at 20.0degc
A wheel starts at rest and takes 3.00 s to rotate 37.0 revolutions at which point its angular velocity is 98.0 rad/s. What is the constant angular acceleration of the wheel
Explain why the VOLTS/DIV knob of an oscilloscope doesn't have to be calibrated and the TIME/DIV button must be calibrated when measuring time-constants
A handball of mass 0.10 kilogram, traveling horizontally at 30 m/s, strikes a wall and rebounds at 24 m/s. Find what is the change in the momentum of the ball
Velocity of an object is zero at the same instant the acceleration is zero. If an object is not accelerating, there are no forcesacting on it. It is possible for a particle moving at constantspeed to have constant acceleration.
Light of wavelength 5.30 102 nm passes through a slit of width 0.210 mm. Determine the width of the first-order bright fringe
One liter of oxygen combines with 1 L of hydrogen to form 1 L of hydrogen peroxide. how many atoms are in one molecule of hydrogen peroxide
A block of mass m = 2.00 kg is attached to a spring of force constant k = 4.65 102 N/m that lies on a horizontal frictionless surface, Find the speed the block has as it passes through equilibrium
An electron has a velocity of 6.0 ? 106 m/s in the positive x direction at a point where the magnetic field has the components Bx = 3.0 T, What is the magnitude of the acceleration of the electron
A glass coffee pot has a circular bottom with a 9.00cm diamteter in contact with a heating element that keeps the coffee warm with a continous heat transfer rate of 50.0w, what is the temperature of the bottom of the pot, if it is 3.00mm thick and..
A car is traveling at a speed of 38.0 m/s on an interstate highway where the speed limit is 75.0 mi/hr. Is the driver exceeding the speed limit
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