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A 5.0mL syringe has an inner diameter of 4.5mm , a needle inner diameter of 0.29mm , and a plunger pad diameter (where you place your finger) of 1.2 cm. A nurse uses the syringe to inject medicine into a patient whose blood pressure is 140/100. Assume the liquid is an ideal fluid.
Part A What is the minimum force the nurse needs to apply to the syringe?
Part B The nurse empties the syringe in 4.9s . What is the flow speed of the medicine through the needle?
A 2.0 kg ball moving with a speed of 3.0 m/s hits, elastically, an identical stationary ball as shown. If the first ball moves away with angle 30° to the original path
A hydrogen atom has a radius of about 0.05 nm. estimate the electron's kinetic energy in three dimensions.
A 2.78-kg steel ball strikes a massive wall at 10.0 m/s at an angle of ? = 60.0° with the plane of the wall, what is the average force exerted by the wall on the ball
Speakers A and B are vibrating in phase. They are directly facing each other, are 8.0 m apart, and are each playing a 76.0-Hz tone. The speed of sound is 343 m/s. On the line between the speakers there are three points where constructive interfere..
A rock is thrown vertically upward with a speed of 19.0m/s from the roof of a building that is 70.0m above the ground. Assume free fall. What is the speed of the rock just before it strikes the ground?
Determine the mass of a 4.6 meter beam, if it is balanced on a fulcrum 2.16 meters from the left end. A 820 N man stands on the very left end, and a 360 N girl stands on the right end. (in kg)
Light has a wavelength of 299.3 nm and a frequency of 7.403 × 1014 Hz when traveling through a certain substance. What is the refraction index of this medium
Suppose an object is set sliding, with a speed less than escape velocity, on an infinite frictionless plane in contact with the surface of the Earth. Describe its motion.
A 1590 kg satellite orbits the Earth at an altitude of 50.4 km. It is desired to increase the altitude of the orbit to 298 km, How much energy must be added to the system to effect this change in alti- tude
A 0.69 cm high object generates an image that is 0.8 cm high. The lens has a focal length of 7 cm, Find the image and object distances
What is the greatest mass that can be accelerated upwards at 2.9 m/s2 if the stress in the cable is not to exceed the elastic limit of the cable, that is 2.2 108 Pa.
Compare the kinetic energy of car travelling. Compare the kinetic energy of an 900 kg car travelling at 30 m/s, and a 1,800 kg car at the same speed.
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