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A weather balloon has a volume 1.2 m^3 at sea level where the pressure is 101 kPa and the temperature is 20 C. When the balloon rises to an altitude of 11 km, the pressure is down to 50.5 kPa and the temperature is about -55 C. What is the volume of the balloon then?
A satellite is in a circular orbit very close to the surface of a spherical planet. The period of the orbit is 2.54 hours. What is density of the planet
A poor artist might approximate a flower as a series of radial lines and circular arcs. What is the direction of the magnetic field
he resolving power of a microscope depends on the wavelength used. what minimum kinetic energy is required for the electrons
A person holds a ladder horizontally at its center. Treating ladder as a uniform rod of length 3.30 m and mass 7.43 kg, find out the torque the person must exert on the ladder to give it an angular acceleration of 0.405 rad/s2.
A very long, straight solenoid with a cross-sectional area of 2.30cm2 is wound with 93.4turns of wire per centimeter. What is the magnitude of the emf induced in the secondary winding at the instant that the current in the solenoid is 3.2
Due to a temperature difference ?T, heat is conducted through a brass plate that is 0.027 m thick. How thick should the steel plate be so that the same amount of heat per second is conducted through it
Electricity and process heat requirements of a manufacturing facility are to be met by a cogeneration plant consisting of a gas turbine and a heat exchanger for steam production.
A vibrating string has a fundamental frequency of 225 Hz. What is the new value of the fundamental frequency
A spherical capacitor with a 1.60 gap between the spheres has a capacitance of 80.0. What are the diameters of the the two spheres
A sound source emits sounds of frequency 215 Hz that travel through still air at 340 m/s. Find the frequency heard by the listener
An air traffic controller has two aircraft on radar. The first is at an altitude of 0.5 km, a horizontal distance of 3 km measured along the ground to the point directly underneath the plane, and a bearing of 115° west of north.
The magnetic field of an electromagnetic wave has a peak value of 5.0 × 10-10 T. What is the intensity of the wave? (c = 3.0 x 108 m/s, c = 3.00 × 108 m/s, ?0 = 4? × 10-7 T ? m/A, u0 = 8.85 × 10-12 C2/N ? m2)
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