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A consumer upset with the latest trend of postal rate increases has decided to try to send letters by balloon even though they may not reach their intended destination. A 6.00 × 104 cm3 gas-filled balloon will provide enough lift for a 43.4 g package to be accelerated upward at a rate of 3.10 m/s2. For these circumstances, calculate the density of the gas the consumer fills the balloon with. The acceleration due to gravity is g = 9.81 m/s2 and the density of air is ?air = 1.16 kg/m3. Neglect the mass of the balloon material and the volume of the package. answer in kg/m^3
Illustratr what is the amplitude of the oscillations? What were the (b) position and (c) velocity of the block at t = 0 s?
An electron is released from rest at the negative plate of a parallel plate capacitor. The charge per unit area on each plate is = 2.6 x 10-7 C/m2, the plates are separated by a distance of 1.4 x 10-2 m. How fast is the electron moving just before..
Two charges, and are the distance apart. These two charges are free to move but do not because there is a third charge nearby what should be the magnitude of the third charge and its placement in sequence for the first two to be in equilibrium.
Three equal point charges, each with charge 1.95 , are placed at the vertices of an equilateral triangle whose sides are of length 0.400 . What is an electric potential energy of the system? (Take as zero the potential energy of the three charges ..
The ultrasonic transducer used in medical ultrasoundimaging, is a very thin disk ( m =0.10g) driven back and forth in SHM at 1.0 MHz by an electromagnetic coil.
Suppose a ping-pong ball and a bowling ball are rolling toward you with the same momentum, and you exert the same average force in stopping each of them.
A ball of mass 1.020 g and positive charge q =45.2 microC is suspended on a string of negligible mass in a uniform electric field. We view that the ball hangs at an angle of theta=15.0 from the vertical. What is the magnitude of the electric field.
A 105-kg water skier floating in a lake is pulled from rest to a speed of 14 m/s in a distance of 25m. What is the net force exerted on the skier, assuming his acceleration is steady.
From what height will you have to drop the rock on Earth so that the fall-time on both planets is the same.
when a dime (diameter 1.624 cm) is placed straight over it, bubble can be seen by looking down into the cube. What are upper and lower bounds of the range of the possible depths of the air bubble beneath surface.
A baseball leaves a pitcher's hand horizontally at a speed of 156km/h. The distance to the batter is 18.3 m. (overlook the effect of air resistance.) (a) How long does ball take to travel the first half of that distance? (b) The second half? (c) H..
The ball loses contact with the spring and leaves the gun when the spring is still compressed by 12 cm. Elucidate what is the speed of the ball when it hits the ground, 1.4 m below the spring gun?
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