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A woman started a new job as an assistant to a jeweler. Her boss just received a very heavy necklace whose owner claims it is made of pure gold, so the boss asks the woman to determine whether the necklace owner's claims are true. The only tool the woman has at her disposal is a spring scale. Using the spring scale, she determines the weight of the necklace as 5.0 N in the air and 4.0 N in water. Knowing that the density of water is 1000 kg/m^3 she determines the density of the material of the necklace. Then she looks in her textbook to compare her answer to the density of gold which is given as 19300 kg/m^3. What did she likely tell her boss regarding if the necklace was made of pure gold? Support your answer with calculations. In all calculations take gravitational acceleration as g = 10 m/s^2.
a crate is pulled by a hoist a distance of 3.4m across the flat truck bed in 8 seconds. determine the work done in
A solenoid 1.30m long and 2.60cm indiameter carries a current of 18.0A. The magnetic field inside thesolenoid is 23.0mT. What is the length of the wire forming the solenoid
a thin gold ring of radius 1.02 cm carries a uniform charge per unit length of 1.02e-14 cm. find the electric field on
a 3.59-f and a 5.68-f capacitor are connected in series across a 30.0-v battery. a 6.41-f capacitor is then connected
you are practicing throwing darts in your dorm. you stand 3.33 m from the wall on which the board hangs. the dart
A turntable that spins at a constant 80 rpm takes 3.70s to reach this angular speed after it is turned on. Find its angular acceleration (in rad/s^{2}), suppose it to be constant, and the number of degrees it turns through while speeding up.
A person walks first at a constant speed of 4.60 m/s along a straight line from point Ato point B and then back along the line from B toA at a constant speed of 2.90m/s. What is her average speed over the entiretrip?
how far from a -7.20 ucpoint charge must a2.30 ucpoint charge be placed for the electric potential energy of the pair
A 5.00 x 10^4 kg space probe is travelling at a speed of 14000 m/s through deep space. Retrorockets are fired along the line of motion to decrease the probe's speed. The retrorockets generate a force of 4.00 x 10^5 N over a distance of 2600 km. What ..
Big yellow fish swimming at 2.0m/s swallows little green fish at rest. Big yellow fish is 3 times as massive as little green fish. What fraction of big yellow fish's initial kinetic energy was lost in this collision
Two charges are separated by a distance d and exert mutual attractive forces F on each other. If the charges are separated by a distance of d/3, what are the new mutual forces? q1 = +2C and q2 = -2C
What fraction of the initial kinetic energy was transferred
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