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1. Work of at least 2000J is required to push a crate up a frictionless incline. If the crate is pushed 20m on the incline and the crate is 20 kg then what is the slope of the incline?
A) 45° B) 90° C) 60° D)30°
2. The kinetic energy of a spring is 100J when compressed by 10cm. What is its spring constant?
A) 10N/cm B) 20 J/cm C) 20000 N/m D) 2000 N/m
3. A plastic cylinder has 20 cm of 750 kg/m 3 oil on top of30 cm of water. Assuming the mass of the plastic cylinder is in important, how high is the center of mass of this container of fluid.
A) 16.66 cm B) 23.33cm C) 30 cm D) 31.67cm
what is the strength of the electric field 4.0cm from a small glass bead that has been charged to positive 4.0cm?
The magnetic flux through a 50-cm-long solenoid that has 500 turns of radius 3.0 cm is 3.0 × 10-2 Wb. Calculate the current through the solenoid
Two charges, -3.5?C and -4.4?C , are located at (-0.70m , 0) and (0.70m , 0), respectively. find the location of the point where the electric field is zero
A crane which is effectively fixed to ground lifts a box of mass m with constant speed. The arm of the crane is supported at its base by a friction-free pivot. Determine the tension in the supporting cable
A 3.0 kg block of silver is completely immersed in water. calculate the mass of water displaced by the silver block
The artificial element seaborgium, atomic number Z = 106, has a highly unstable isotope 263Sg106, which has atomic mass (mass of the neutral atom, including the electrons) 263.1186 u. Discover the binding energy per nucleon (BE/A) of its nucleus.
What is an average velocity of the rock
A transformer with a turns ratio (secondary:primary) of 1:81 is used to step down the voltage from a 120-V wall socket to be used in a battery recharging unit. What is the voltage supplied to the recharger? V
One of the dangers of tornados and hurricanes is the rapid drop in air pressure that is associated with such storms. Assume that the air pressure inside of a sealed house is when a hurricane hits.
an automatic external defibrillator delivers 125j of energy at a voltage of 1050v. what is the capacitance of this
A horizontal aluminum rod 4cm in diameter projects 5.2 cm froma wall. A 1700kg object is suspended from the end of the rod. Find the vertical deflection on the end of the rod
You have been playing baseball in the middle of the summer and you have 0.25 kg of Gatorade in an insulated container sitting on the dugout bench, what would be the final temperature of the gatorade
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