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If a heater supplies 1.8×106 J/h to a room5.0 m × 5.2m×3.0 m containing air at 20°C and 1.0 atm, by how much will the temperature rise in one hour, assuming no losses of heat or air mass to the outside?
a lens with focal length 50 mm and a maximum aperture f2 forms an image of an object 9.0 m away.a. what is the
The ground state for a single valence electron of a rubidium atom (Z=37) is 5s and its energy is –4.18 eV. The valence electron is excited into the 5g state. We want to determine the energy of this 5g electron. Assume that the wave function for th..
A silver medallion is sealed within a transparent block of plastic. How far below the top surface would the medallion appear if the observer (not wearing goggles) and the block were under water
In a Young's double slit experiment, the slit separation is made to be exactly 4?. At what angle will the third bright fringe to the side of the central fringe occur? Caution: the angles involved are such that the approximation sin? is not valid.
The figure shows a lower leg being exercised. It has a 49-Nweight attached to the foot and is extended at an angle with respect to the vertical. Consider a rotational axis at the knee, as indicated.
A subatomic particle called a muon has a mass 207 times that of an electron and a charge equal to an electron charge. how long will the muon survive before decaying
q. 1. what physical quantities can be represented by vectors? why? how do you determine the resultant force of the
Which of the following statements is NOT a correct assumption of the classical model of an ideal gas? In each cycle of a Carnot engine, 100 joules of heat isabsorbed from the high temperature reservoir and 60 joules isexhausted to the low temperatu..
When a guitar string is sounded along with a 434Hz tuning fork, a beat frequency of 1.00Hz is heard. When the same string is sounded along with a 426Hz tuning fork, the beat frequency is 9.00Hz. What is the frequency of the string?
a car is traveling at 30.0 ms when the driver suddenly applies the brakes giving the car a constant deceleration. the
A 18.60 kg piece of zinc at 75 degrees Celsius is placed in a container of water. The water has a mass of 20 kg and has a temperature of 10.10 degrees Celsius before the zinc is added. What is the final temperature of water and zinc.
question an aqueous solution containing barium iodide bai2 is electrolyzed in a cell containing inert electrodes. the
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