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A 1.40 kg block slides with a speed of 0.950 m/s on a frictionless horizontal surface until it encounters a spring with a force constant of 734N/m. The block comes to rest after compressing the spring 4.15 cm. Find the spring potential energy, U, the kinetic energy, K and the total mechanical energy of the system, E, for compressions of (a) 0cm (b) 1.00 cm (c) 2.00 cm (d) 3.00 cm (e) 4.00 cm
an iron boiler of mass 230 kg contains 900 kg of water at 23degc. a heater supplies energy at the rate of 51500 kjh.how
A cord of length 1.5 m is fixed at both ends. Its mass per unit length is 1.2 g/m and the tension is 12 N. Calculate the frequency of the fundamental oscillation
a uniform rod of mass 100 g and length 50.0 cm rotates in a horizontal plane about a fixed vertical frictionless pin
A vertical electric field of magnitude 2.45 104 N/C exists above the Earth's surface on a day when a thunderstorm is brewing. Determine the electric flux through the bottom of the car
When a liquid and its vapor are in equilibrium, the rates of evaporation of the liquid and condensation of the vapor are equal. Compute the rate of evaporation of mercury into a vacuum
an object 9mm tall is placed 12cm to the left of the vertex of a convex spherical mirror whose radius of curvature has
A 3.00 mass on a spring has displacement as a function of time given by the equation. Find the maximum magnitude of force on the mass
A gas mixture contains 2.50 mol of O2 and 3.00 mol of Ar. What is the molar specific heat at constant pressure for this mixture
a parallel-plate capacitor has an area of 4.00 cm2 and the plates are separated by 1.00 mm with air between them. the
The wing of an airplane has an average cross-sectional area of 13 m2 and experiences a lift force of 91,000 N. What is the average difference in the air pressure
A 21 kg suitcase is being pulled with constant speed by a handle that is at an angle of 30 degrees above the horizontal. What was the mass of the dog food
A 2.5hp electric motor on a water well pumps water from 10m below the surface. The density of water is 1.0 kg per liter. How many liters of water does the motor pump in 2.0hr
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