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A gun is fired with angle of elevation 30 degrees. The max height of the shell is 300 meters. What was the muzzle speed?
_______ m/s
salt water has a greater density than freshwater. a boat floats in both freshwater and saltwater. the buoyant force on the boat in salt water is __________ than in freshwater
A positive charge of magnitude Q1 = 6.5 nC is located at the origin. A negative charge Q2 = -6.5 nC is located on the positive x-axis, Calculate the angle in degrees of the electric field at point P relative to the positive x-axis
An object weighing 305 N in air is immersed in water after beingtied to a string connected to a balance. The scale now reads 271 N.Immersed in oil, the object appears to weigh 278 N . The density ofthe object is 8970.588 kg/m^3. Find the density of t..
Suppose that 2.8 moles of an ideal diatomic gas has a temperature of 1003 K, and that each molecule has a mass 2.32 Ã* 10^-26 kg, What is the internal energy of the gas
kilograms of water are changed from ice at 0?C into liquid water at 0?C, determine the change in mass of the water
A hypodermic syringe has a piston area of 0.5 cm^2 and a needle with circular opening of diameter 0.2 mm. What is the gauge pressure in the syringe while pushing the piston with 1 N of force
how does the use of h ii regions to find a galaxys distance differ from the use of cepheid variables? in question 4
A 4 kg uniform cylinder is released at the top of a 1.54 m 24° incline. What is its velocity when it reaches the bottom
A three-way lightbulb can produce 50W, 100W or 150W at120V. Such a bulb contains two filaments that can beconnected to the 120V individually or in parallel. What must be the resistance of each filament
Suppose the temperature of 4.63 L of ideal gas drops from 353 K to 275 K. (a) If the volume remains constant and the initial pressure is atmospheric pressure, find the final pressure. Pa (b) Find the number of moles of gas. mol
At 20.0°C, a mainly silicon resistor has a resistance of 275 ?, and a tungsten resistor has a resistance of 752 ?. At what temperature will their resistances be equal
A grinder consists of a solid 15 kg disk with a diameter of 57 cm. A when active, the disk rotates at a rate of 83 rad/sec. find the rate of angular acceleration of the disk
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