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1) A rock is suspended form a scale reads 10.0 N. A beaker of water is raised up so the rock is totally submerged in the water. The scale now reads 6.25 N. What is the density of the rock? ((answer: 2.67 times the density of water))
2) A sewing machine needle moves up and down in simple harmonic motion with an amplitude of 1.27 cm and a frequency of 2.55 Hz. What is the maximum speed of the needle? ((answer: 20.3 cm/s))
A hockey puck is swung at the end of a very slight 30 cm long string in a horizontal circle. what is the tension force supplied by the string
A group of physics students are conducting an experiment in projectile motion. They want to launch a ball into a bucket that is 8 meter away from their spring loaded launcher. Find the time of flight for the ball in their experiment
An ac generator with a frequency of 1.54kHz and an rms voltage of 22.2V is connected in series with a 1.90k, What is the power factor for this circuit
A nonuniform electric field is directed along the x-axis at all points in space. This magnitude of the field varies with x , but not with respect to y or z. find the net electric flux passing through the cylindrical surface
A hockey puck has a mass of 0.113 kg and is at rest. A hockey player makes a shot, exerting a constant force of 28.0 N on the puck for 0.16 s. With what speed does it head toward the goal
At what frequency f do a 1.3 µF capacitor and a 1.3ÃŽ inductor have the same reactance, What is the value of the reactance at this frequency
A projectile is fired horizontally from a gun that is 41.0m above flat ground. The muzzle velocity is 260 m/s. What is its speed as it strikes the ground
A horizontal force of 280 Nis exerted on a 2.0 kg discus as it is rotated uniformly in ahorizontal circle (at arm's length) of radius 1.00 m. Calculate the speed of the discus
When you touch a friend after walking across a rug on a dry day, you typically draw a spark of about 2.01mm. Calculate the potential difference between you and your friendjust before the spark.
A standardized biological microscope has an 8.0--focal-length objective. What focal-length eyepiece should be used to achieve a total magnification of.
A person in the air above the water in a swimming pool looks straight down into the water (n = 1.33) at a diamond ring that lies on the bottom of the pool. what is the depth of the water
On a frozen pond, a 11.6 kg sled is given a kick that impartsto it an initial speed of vo = 2.15 m/s. find the distance the sled moves before coming to rest
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