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A spherical balloon is made from a material whose mass is 2.57 kg. The thickness of the material is negligible compared to the 1.22-m radius of the balloon. The balloon is filled with helium (He) at a temperature of 296 K and just floats in air, neither rising nor falling. The density of the surrounding air is 1.19 kg/m3. Find the absolute pressure of the helium gas.
A mass spectrometer is a device which consists of a velocity selector, with crossed electric and magnetic fields E = 950 V/m, B = 0.93 T. Calculate the radius for a singly ionized charged particle with a mass m = 2.18 × 10-26 kg
An amazing parent pushes their child's sled (total mass = 65kg) so that the sled is moving at 5 m/s at the top at the sledding hill which makes a 20 degree angle with the horizontal. calculate the speed of the sled
A cycle receives 500 Btu of heat at 1000°F and rejects 200 Btu of heat at 200°F. There is work input of 275 Btu and work output of 575 Btu. Compute the cycle efficiency
An 85 kg jogger is heading due east at a speed of 1.6 m/s. A 55 kg jogger is heading 34° north of east at a speed of 3.6 m/s. compute the direction of the sum of momenta of two joggers
A thin hemispherical shell of radius R has a uniform surface charge, Find the electric field at the center of the base of the hemispherical shell
In a crash test, a 1100 kg car slams into a concrete wall at 17.1 m/s and comes to rest in 0.275 s. a)Find out the magnitude of the impulse delivered to the car.b) Find the average stopping force.
three uniform objects: a rod, a right triangle, and a square. Their masses and their coordinates in meters are given. Determine the center of gravity for the three-object system
Imagine a very heavy cube of pure gold that is 1.23 m on a side. Approximate the atoms in this cube as little cubes, How far would the line stretch
four charges, given in multiples of 1.00×10-5 C form the corners of a square and four more charges lie at the midpoints of the sides of the square. find the direction of the electric field at the center of the square
Three masses ( 3kg 5kg 7kg) are located in the xy-plane at the origin, (2.3 m, 0), and (0, 1.5 m), respectively. Determine the center of mass of the system
A converging lens with a focal length of 12.4cm forms a virtual image 8.50mm tall, 17.6cm to the right of the lens. Determine the position of the object
a projectile is fired with an initial speed of 64.8m/s at an angle of 44.3 degrees above th horizontal on a long flat firing range. determine the direction of the projectile
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