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On its highest setting, a heating element on an electric stove is associated to an ac voltage of 240 V. This element has a resistance of 29 ohm. (a) Discover the power dissipated in the element. (b) Assuming that three-fourths of the heat produced with the element is used to heat a pot of water (the rest being wasted), discover the time required to bring 1.9kg (half a gallon) of water at 1.5 C to boil.
A public transportation bus makes the position-time graph over a 5.00 hour interval shown below. What is the average velocity (magnitude and direction) of the bus
a randomized trial is conducted to evaluate the efficacy of a new cholesterol lowering medication. the primary
a ball is thrown vertically upwards into the air. it rises a vertical distance of 3.1 m before falling to the ground.
A narrow tube open at one end has varibale length. When a vibrating tuning fork is held near one end, What is a possible frequency of the tuning fork
Two identical carts travel at 1m/s in opposite directions on a common horizontal surface. They collide head-on and are reported to rebound, each with the speed of 2m/s.
A mass m = 8.0 kg is attached to a spring and allowed tohang in the Earth's gravitational field. what would be its frequency
A small space telescope at the end of a teather line of length "L" moves at liner speed "v" about a central space station, what will be the linear speed of the telescope if the length of the line is reduced to 0.33L
The eyepiece of a compound microscope has a focal length of 2.60 cm , and the objective lens has = 0.760 cm. calculate the distance between the lenses when the microscope is adjusted for a relaxed eye
A 3.1-cm-tall object is 47 cm in front of a converging lens that has a 11.8 cm focal length. Calculate the image position and height
The work function for a metal surface is 5.22 eV. What is the largest wavelength of light in nm that will produce photoelectrons from this surface
A nearsighted patient's far point is 0.723 m from her eyes. What is the distance between her eyes and the glasses
To verify her suspicion that a rock specimen is hollow, a geologist weighs the specimen in air and in water. What fraction of the specimen's apparent volume is solid
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