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Is heat energy transformation takes place in the case of a Hot air balloon? What are the differences between transverse and longitudinal waves and how do they interact in a medium? Object B has a length of 10 cm a width of 5 cm and a height 2 cm. Its mass is 300g. Find the density of object B.? What force is responsible for friction? Which color is visible with the wave length of 380 nanometers? Monochromatic light passes through 2 parallel slits forms an interference pattern on screen As the distance between the 2 slits is decreased the distance between light bands in the pattern? What is environmental communication interference? If sound waves travel away from there source there what decreases? What do absolute values and temperatures on the kelvin scale have in common? What is the sound of a falling rain? If a force of 15N is applied to a disk with a radius of 0.5m. What is the torque? Do reactions create energy? How can you derive the unit of frequency from basic units? What is the acceleration of a 30.0-kg go kart if the thrust of its engine is 300.0 N? Why is is that is impossible to have a 100 percent efficiency? Why current cannot pass through a insulator? What is the mechanical efficiency of a machine that produces 400 joules or work output from a work input of 500 joules? Which waves would have a longer wavelength 56 Hz frequency or 2 MHz frequency? How does a vacuum between the inner and outer walls of a thermos bottle limits heat loss through conduction and convection? What is the number of waves that pass in a given amount of time known as?