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Lead pellets, mass of each is 0.80 gram is heated to 200°C. Find how many pellets must be added to 480 gram of water that is initially at 20°C to make the equilibrium temperature 25°C? Ignore any energy transfer to or from the container.
________pellets
The electric potential is given by (50 V/m7)(xz6 + x3y4) in the region of space that includes the point (x,y,z) = (-2,7,-3) m
protons are projected with an initial velocity v0 = 10410m/s into a region where a uniform electric field E = 710 N/C is present. The protons are to hit the target that lies a horizontal distance of 1.27mm from the point where protons are launched..
A highway has an unbanked curve with a radius of 100m. An engineer suggest banking the curve so that it is safer in icy weather. How does banking the curve make it safer
Rank the voltage across each cylinder. A baseball is seen to pass upward by a window 15 m above the street with a vertical speed of 18 m/s. imagine the ball was thrown from the street. What was it's initial speed.
find frequencies of vibration of the piano wire. Car 1 has 3 times the mass of car 2, but only 0.5 as much kinetic energy. What is the ratio between the speeds of the two cars (v1/v2)? You must type your answer as a numerical value.
a point charge q is held at a distance of 2a from the center of an isolated and the conducting sphere of radius a. what is the potential of the sphere
The electron beam inside a television picture tube is 0.40mm in diameter and carries a current of 50uA. How many electrons strike the screen each second
A certain string just breaks while it is under 25 N of tension. A boy uses this string to whirl a 0.75-kg stone in a horizontal circle of radius 2.00 m. The boy continuously increases the speed of the stone. At around what speed would the string b..
Some gliders are launched from the ground by means of a winch, which rapidly reels in a towing cable attached to the glider. Find what average power must the winch supply
A high-voltage power line carries a current of 120A at a location where the Earth's magnetic field has a magnitude of 0.59 G and points to the north, 63 degrees below the horizontal. Find the magnitude of the magnetic force exerted on a 290m length..
Two cylindrical glass beads each of mass m = 44 mg are set on their flat ends on a horizontal insulating surface separated by a distance d = 3 cm. The coefficient of static friction between the beads and the surface is ?s = 0.2. The beads are then gi..
A 7.9-m long string is moved up and down with simple harmonic motion with a frequency of 91 Hz. Determine the velocity of the wave on the sting
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