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When a light bulb is connected across the terminals of a battery, the battery delivers 20 W ofpower to the bulb. A voltage of 12.8 Vexists between the terminals of the battery, which has an internalresistance of 0.14 Ω. What is the emf of the battery?
A projectile is launched at ground level with an initial speed of 50.0 m/s at an angle of 30.0º above the horizontal. It strikes a target above the ground 3.00 seconds later. What are the x and y distances from where the projectile was launched to..
Only two forces act on an object (mass = 3.30 kg), as in the drawing. (F = 79.0 N.) Find the magnitude and direction (relative to the x axis) of the acceleration of the object
Explain why the color temperatures of the sun in bright sunlight and in the shade are different, even though the sun did not change temperature. What are the physical causes of this difference, and which is a better estimate for the sun's temperature..
As you eat your way through a bag of chocolate chip cookies, you observe that each cookie is a circular disk of diameter of 5.70 ± 0.02 cm, Find the average volume of a cookie
An initially uncharged electroscope is polarized by bringing a negatively charged rubber rod near the bulb. If the bulb end of the electroscope acquires a net charge of +2.60pC , how many electrons are on the leaf end
a VW bug hits a huge truck head on. each vehicle was initially going 50 MPH. which vehicle experience the greater force
Two in-phase loudspeakers are some distance apart. They emit sound with a frequency of 1 kHz. What beat frequency do you observe
A space traveller weighs herself on Earth, at a location where the acceleration due to gravity is 9.81 m/s2, and finds a value of 543 N. What is her mass
The specific heat of water is 4186 J/(kg-degree Celsius) and the specific heat of copper is 387 J/(kg-degree Celsius). What is the mass of water
The pendulum pictured above has a length of 15.0 cm when it is displaced to the right of the peg, Determine the period for this pendulum close to the surface of the Earth
An arrow is shot at an angle of θ=45° above the horizontal.
A light spring with a force constant of 12 is connected to a wall and to a 1.9 toy bulldozer, What is the numerical value of this coefficient of friction
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