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Q1. Throughout liftoff a hot air balloon accelerates upward at a rate of 2.7 ms^2. The balloonist drops an object over the side of the gondola when speed is 14 m/s^2.
- What is the magnitude of objects acceleration after it is released (relative to the ground).
- How long does the object take to hit ground?
Q2. A child's water pistol shoots water through a 1.8 mm-diameter hole. If the pistol is fired horizontally 78 cm above the ground, the squirt hits the ground 1.8 m away. What is the volume flow rate through the squirt? Ignore air resistance.
Two linear waves have the same amplitude and speed, and otherwise are identical except one has half the wavelength of the other, Which transmits more energy
A pipe open only at one end has a fundamental frequency of 282Hz. A second pipe, initially identical to first pipe, is shortened by cutting off a portion of the open end.
A person ca throw a 1.00 Kg stone at a speed of 15.0 m/s. He moves his hand forward 0.75 m while doing so. How much work does the person do on the rock
A thyroid cancer patioent is given a dosage of 131I, What faction of the dosage will still be in the patient's thyroid
The semiconducting compound InAs is widely used for infrared light emitting diodes (LED's). What is the frequency of light emitted by a InAs LED
A 0.70 kg ball is moving horizontally with a speed of 7.7 m/s when it strikes a vertical wall. What is the magnitude of the impulse of the ball
An object placed 2.6 meters in front of a mirror produces an inverted image of one half the size. find Is it convex or concave
A rocket ship at rest in space gives a short blast of its engine, firing 90 kg of exhaust gas out the back end with an average velocity of 700 m/s.
What least horsepower must a motor have to be able to drag a 320 box along a level floor at a speed of 1.10 if the coefficient of friction is 0.50.
An Ar+ laser emits radiation at a wavelength of 515 nm, and a power of 7 W. Determine how many argon ions
To examine a particular blood sample in biology lab, a student uses a compound microscope set to have a magnification of -4530. What is the distance between the blood sample and the objective lens
Calculate the moment of inertia of a skater given the following information. THe 65 kg skater is approximated as a cylinder that has a .110 m radius
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