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One way to administer an inoculation is with a "gun" that shoots the vaccine through a narrow opening. No needle in necessary, for the vaccine emerges with sufficient speed to pass directly into the tissue beneath the skin. The speed is high, because the vaccine (? = 1170 kg/m^3) is held in a reservoir where a high pressure pushes it out. The pressure on the surface of the vaccine in one gun is 4200000 Pa above the atmospheric pressure outside the narrow opening. The dosage is small enough that the vaccine's surface in the reservoir is nearly stationary during an inoculation. The vertical height between the vaccine's surface in the reservoir and the opening can be ignored. Find the speed at which the vaccine emerges.
A child slides down a slide with the 29 degree incline, and at the bottom her speed is precisely half of what it would have been if the slide had been frictionless. Compute the coefficient of sliding between the child and the slide.
question a 10 ohm resistor a 12.0 microfarad capacitor and a 17.0 mh inductor are connected in series with a 155 v
Insects do not have lungs as we do, nor do they breathe through their mouths. Instead, they have a system of tiny tubes, called tracheae, find the oxygen concentration at the interior end of the tube
The image produced by a concave mirror is located 38 cm in front of the mirror. How far in front of the mirror is the object located
A car is at the top of a 100 meter high hill, the car is coastingat 20 meters/sec., the car rolls down the hill. How fast is the car traveling when it reaches the bottom
Your car's wheels are 69 cm in diameter and the wheels are spinning at an angular velocity of 105 rad/s. How fast is your car moving in kilometers per hour
A coil of 5 turns and area 20 cm2, carries a current of 8.0A. If the coil is in a uniform external field of magnitude of 0.5T. what is the maximum torque on the coil
Intense white light is incident on a diffraction grating that has 625 lines/mm. What is the angular separation between the violet edge (400 nm) and the red edge (700 nm) of the first order spectrum produced by the grating
On a day when the wind is blowing toward the south at 1.2 m/s a runner jogs west at 1.6 m/s. What is the velocity (speed and direction) of the air relative to the runner
A hockey player is standing on his skates on a frozen pond when an opposing player, moving with a uniform speed of 4.0 m/s, How long does it take him to catch his opponent
A certain substance has a mass per mole of 42 g/mol. When 313 Jis added as heat to a 25.0 g sample ofthis material, How many moles of the substance are present
How did Pavlov and Watson's focus on scientific inquiry of behaviours differ from earlier viewpoints of structuralisms, psychoanalysts, and functionalists.
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