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A 0.61 kg block is hung from and stretches a spring that is attached to the ceiling. A second block is attached to the first one, and the amount that the spring stretches from its unstrained length triples. What is the mass of the second block?
A metal guitar string has a linear mass density of ? = 3.20 g/m. What is the speed of transverse waves on this string when its tension is 80.0 N
In our electrostatics lab, we charge a metal sphere to 1000 V. What is the electric potential due to the charged sphere at a point 1.00 cm from its surface
Vectors A and B have scalar product -3.00 and their vector product has magnitude 5.00. What is the angle between these two vectors
a sodium atom emits a photon with wavelength 818 nm shortly after being struck by an electron
on turning a corner ,a motorist rushing at 44m/s find a child on road 100m away. he applies the brakes so as to stop the motorcar within 1m of child. calculate the time required to stop.
The current through a 686 ? resistor is 190 mA. To the nearest volt, what is the potential difference across the resistor
A woman can read the large print in a newspaper only when it is at a distance of 55 cm or more from her eyes. What should be the refractive power (in diopters) of her glasses
A box weighing 900 N rests on a surface. A force of 500 N is pushing on the side of the box. find The magnitude of static friction acting on the box
A solenoid 300 turns having a length of 25.0 cm and a diameter of 10.0 cm has a current of 0.290 A.
A pot containing 1.01 liter of water, initially at 19°C, is placed on a 1051 W electric heating element. How much heat is necessary to boil all the water away
A spring of spring constant k=12.50 N/m is hung vertically. A 0.5000 kg mass is then suspended from the spring. What is the displacement of the end of the spring
Daisy throws a rock horizontally with a speed of 12 m/s from a bridge. It falls 2.28 s before reaching the water below. When the rock hits the water it is traveling with what horizontal component of the velocity.
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