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A weather balloon is designed to expand to a maximum radius of 24 m at its working altitude, where the air pressure is 0.030 atm and the temperature is 200 K. If the balloon is filled at atmospheric pressure and 259 K, what is its radius at liftoff?
A centripetal force of 235 N is experienced by a mass of 12.3 g as it is spun in a circular path with a radius of 2.50 meters. What is the period of the object
It is currently popular for automobiles to use 10% ethanol / 90%gasoline mixtures (‘gasohol’) as fuel. According topopular consensus the main benefit of gasohol use is that it“reduces our dependence upon foreign oil.” Test thisassertion by making ..
A baseball (0.15 kg) and an electron both have a speed of 75 m/s. Find the uncertainty in position of each of these objects
A centripetal force of 258 N is experienced by a 0.625 gram object as it is spun in a circular path with a radius of 3.50 meters. What is the frequency of the object in RPM
A strong lightning bolt transfers about 26 C to Earth. How many electrons are transferred? The elementary charge is 1.60218 × 10?19 C
A hypodermic syringe contains a medicine with the density of water (see figure below). The barrel of the syringe has a cross-sectional area of 2.50 x 10^-5 m2. In the absence of a force on the plunger, the pressure everywhere is 1.00 atm.
A 0.50kg object is attached to an ideal massless spring of spring constant 20N/m along a horizontal, frictionless surface. What is the amplitude of vibration
A toy rocket engine lifts a mass of 4.5 kg to a height of 15.0 meters. At this height, the rocket is moving at 26.7 m/s. How much work was done by the rocket engine
Earth's Atmosphere It is found experimentally that the electric field in a certain region of Earth's atmosphere is directed vertically down. At an altitude of 270 m the field has magnitude 60.0 N/C; at an altitudeof 170 m, the magnitude is 100 N/C..
Calculate the electric force between these two electrons. The value of the Coulomb constant 9 × 109 N · m2/C2 and the elemental charge is 1.6 × 10?19 C
A small object is placed to the left of a convex lens and on the optical axis. What is the position of the image formed by the lens
In a Young's double-slit experiment, the wavelength of the light used is 535 nm (in vacuum), Determine the angle in degrees that locates the second dark fringe
A lamp (R = 146 omegacap.gif), an electric heater (R = 25 omegacap.gif), and a fan (R = 51 omegacap.gif) are connected in parallel across a 115 V line. What power is expended in the heater
A dedicated sports car enthusiast polishes the inside and outside surfaces of a hubcap that is a thin section of a sphere. How far is her face from the hubcap
A disk with mass m = 8.5 kg and radius R = 0.35 m begins at rest and accelerates uniformly for t = 18.8 s, to a final angular speed of ? = 28 rad/s. What is the moment of inertia of the disk?
If a second point charge of ?3.0 nC is placed at the location where you calculated the electric field in part (a), what will be the magnitude of the force on this second charge due to the field of the first
If the hydrogen atoms undergoes a transition between these states, it emits a photon with a characteristic wavelength of 21 cm. What is the energy difference between the 2 states
A quarterback claims that he can throw the football a horizontal distance of 183 m (200 yd). Furthermore, he claims he can do this by launching the ball at the relatively low angle of 30.0 degrees above the horizontal.
A point source of light is 40.0 cm below the surface of a swimming pool (for water, n=1.333). Find the diameter of the largest circle
A metal ball with a mass of 3.81·10-6 kg and a charge of +5.21 mC has a kinetic energy of 4.77·108 J. how close will it come to the plane before stopping
A solid sphere of mass 0.524 kg rolls without slipping along a horizontal surface with a translational speed of 5.33 m/s. It comes to an incline that makes an angle of 31.7° with the horizontal surface. Ignoring energy losses due to friction, to what..
From what height did the student fall? Assume that the only force acting on him throughout the collision is that as a result of the ground.
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