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Determine the energy needed to change a 0.85 kg block of ice at 0 °C into water at 20°C. The heat of fusion for water at 0 °C is Lf = 3.35E5 J/kg. The specific heat of water is c = 4180 J/kg⋅°C.
Express your answer to two significant figures and include the appropriate units.
A dog with a mass of 20 kg is sitting on a board with a mass of 5 kg. The board is on ice and is free to slide without friction. What is the resultant velocity of the board
In designing a transformer, an engineer knows she needs 240 V to come out of the secondary circuit. what is the ratio of primary voltage to primary turns
A government agency estimated that air bags have saved over 14,000 lives as of April 2004 in the United States. What is the magnitude of the person's impulse
A small piece of dust of mass m = 1.3 mu or micro g travels horizontally through an electric air cleaner in which the electric field is 485 N/C. What is the charge on the dust particle
how do the phase angle and current change as the resistance changes in a circuit where the frequency stays constant?
q1. a pet-store supply truck moves at 25ms north along a highway. inside a dog moves at 1.85ms at an angle of 35deg
A 0.35 kilogram pinecone falls 14.7 meter to the ground, where it lands with a speed of 11 m/s. Find with what speed would the pinecone have landed
In the Bohr model of the hydrogen atom, an electron (mass m=9.1×10^?31kg) orbits a proton at a distance of 5.3×10^?11m. How many revolutions per second does the electron make
Question: Field and force with three charges? What is the electric field at the location of Q1, due to Q 2 ?
Then, placed a 58.4 g mass (including the hanger mass) on the right side of the fulcrum and adjusted the position until balance is achieved.
Find the Norton equivalent seen by RL in given Figure.- Select the value of RL so that 3 V is delivered to the load.- 300 mA is delivered to the load.
When a driver brakes an automobile, the friction among brake drums and brake shoes converts the car’s kinetic energy to heat. If a 1481 kg automobile traveling at 31 m/s comes to a halt, how much does the temperature rise in all of the four 3.8 kg ir..
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