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The pendulum in a grandfather clock is made of brass and keeps perfect time at 20?C.
Does the clock go faster or slower if they is kept at 28?C? (Assume the frequency dependence on length for a simple pendulum applies.)
How much time is lost in a year?
A thin, horizontal copper rod is 1.20 m long, What is the minimum current in the rod that can cause it to float in a horizontal magnetic field of 2.45 T
A small 0.300-kg object moves on a frictionless horizontal table in a circular path of radius 2.40 m. what is the radius of the smallest possible circle on which the object can move
Your projectile launching system is partially jammed. It can only launch objects with an initial vertical velocity of 42.0 m/s, What horizontal velocity do you need to program into the system
How much charge passes through the hair dryer. Find the magnitude of the magnetic field at the center of the square.
Radioactive isotopes frequently occur together in mixtures. Assume a 400g sample contains, with a half-life of 12 days, and, with a half-life of 4.5 days. If there are firstly twice as many calcium atoms as there are barium atoms, what will be the ra..
A diver releases an air bubble of volume 2.2 cm3 from the depth of 10 m below the surface of a lake, where the temperature is 7°C. What is the volume of bubble when it reaches just below the surface of the lake, where temperature is 25°C.
Imagine two 5.0 g bags of protons, one at the earth's north pole and the other at the south pole. Calculate the electrical repulsion that each bag exerts on the other.
The dipole is held perpendicular to a uniform electric field with field strength 980V/m , then released. What is the dipole's angular velocity at the instant it is aligned with the electric field?
A 4 kg ball is raised a vertical distance of 2 meters. Using the conservation of energy principle calculate the final speed of the ball right before it hits the ground
two parallel plates are separated by a distance of 25mm. the potential difference across the plates is 500v, what is the change in kinetic energy of the electron in electron volts
The electron's magnetic moment is known as the "Bohr Magnetron" and has a theoretical value of ?B?eh4?m, where "h" is Planck's constant (h=6.63×10?34 J?s), Calculate the magnetic moment value of the Bohr Magnetron
Two charged pith balls are suspended on very light 10.7 cm strings. Each has a mass 11.0 g. In stability, the total angle between the strings is 37 degrees. Draw the free body diagram for one of the pith balls and clearly label all forces with magnit..
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