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A 190 g sampleof a substance is heated to 324°C and then plunged into a 100 galuminum calorimeter cup containing 175 g of water and a 17 g glassthermometer at 12.3°C. The final temperature is 34.8°C. What is the specific heat of the substance?
In a television picture tube, electrons strike the screen after being accelerated from rest through a potential difference of 32000 V. find the electron speed just before the electron strikes the screen
A camera's flash uses the energy stored in a 270 microF (uF) capacitor charged to 190 V. The current in the charging circuit is not to exceed 25 mA. What's the resistance in the charging circuit
A constant force of magnitude 30 N makes an angle of 150° (measured counterclockwise) with the direction of increasing x as the force acts on a 2 kg object. How much work is done on the object by the force
At 18°C, a brass cube has an edge length of 32 cm. What is the increase (in square cm) in the cube's surface area
Imagine that the only visible photons that an electron in a box of unknown length emits have wavelengths of 689nm and 413nm, Identify the transitions and find the length of the box
Find the position of the object to acquire real, magnified image, inverted, and virtual, upright image.
A 1.5-cm tall object is placed 0.50 m to the left of a diverging lens with a focal length of 0.20 m. What is the location of the final image with respect to the object
What is the angle between a wire carrying 8.30 A and the 1.20 T field it is in, What is the force on the wire if it is rotated to make a 90° angle with the field
In a certain experiment, the pressure of a gas depends on the volume by P=aV^2+b, where a=5.0 atm/m and b = 8.5 atm. What is the work done on the gas
Veronique is nearsighted; she cannot see clearly anything more than 6.39 m away without her contacts. What is the greatest distance an object can be placed so that she can see it clearly with these glasses
a red car and a green car move toward each other in adjacent lanes and parallel to an x axis. At time t = 0, the red car is at xr = 0 and the green car is at xg = 211 m, What are the acceleration of the green car
A marble is projected up along a 11 ° incline track at an initial speed of 2.2m/s and then coasts without friction. How far did the marble travel before it comes to its momentary rest point
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