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A firecracker, initially at rest, explodes into two fragments. The first, of mass 14 gram, moves in the positive x-direction at 48m/s. The second moves at 32m/s. Calculate the mass and direction of its motion.
A +20 nC point charge is placed on the x axis at x =2.0 m, What is the direction of the electric field at the origin
The ammonia molecule NH3 has a permanent electric dipole moment equal to 1.47 D, where 1 D = 1 debye unit = 3.34 x 10-30 C-m. Calculate the electric potential in volts due to an ammonia molecule at a point 65.0 nm away along the axis of the dipole. (..
The intensity of sunlight hitting the Earth is about 1300 W/m^2. How much pressure (per square meter) does it exert
Two students are on a balcony 18.30 m above the street. One student throws a ball, b1, vertically downward at 16.80 m/s. At the same instant, the other student throws a ball, b2, vertically upward at the same speed.
What is magnitude of the speed of the boat relative to a stationary shore observer. A person stands at a point that is 4 m from one of the speakers and 4.4 m from the other. Does the person hear the tone? Explain.
a driver involved in an accident claims he was going only 42 mph. when police tested his car they found that when his
Calculate the mass flow rate (in grams per second) of blood (? = 1.0 g/cm3) in an aorta with a cross-sectional area of 2.0 cm2 if the flow speed is 30 cm/s
n object of mass "m" specific heat "Cp" & surface area "As" is initially at a temperature "To". Rate of Heat gained by Object = Rate of Heat Lost by Gas m, Cp, h, A & Tg are all constants.
a tube open at only one end is cut into two shorter nonequal lengths. the piece that is open at both ends has a
When connected to a 120 V source, an electric heater is rated at 1200 W and a toaster at 6.0 102 W. what total current is delivered by an external source
A .500kg football is thrown toward the eastwith a speed of 15m/s. A stationary reciever catches the ball andbings it to rest in .020s. What is the average force exerted on the reciever
The nucleus of a helium atom contains two protons. In a simple model of this nucleus, What is the electric potential energy of the two protons
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