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E, N After ripping the padding off a chair you are refurbishing, you notice that there are six springs beneath, which are intended to contribute equally in supporting your weight when you sit. You find a tag that indicates that the springs are identical and that each has a spring constant of 1.5 X 103 N/m. What would be the elastic potential energy stored in the six-spring system if you were to sit on the chair?
A 500? resistor and a 240mH inductor are connected in series with an ac generator with an rms voltage of 17.0V, compute the rms current in this circuit
A 0.70 Kg block is hung from and stretches a spring that is attached to the ceiling. A second block is attached to the first one, and the amount that the spring stretches from its unstrained lenght triples. What is the mass of the second block?
A 89.1-kN car is travelling at 73.1 mph when the driver decides to exit the freeway by going up a ramp. What is the magnitude of the average drag force exerted on the car
A 33.0 g bullet moving at 434 m/s strikes a 5.0 kg bag of flour that is on ice, at rest. The bullet passes through the bag, leaving at 295 m/s. How fast is the bag moving while the bullet exits.
a car is moving down a street at 55 kmh. a child suddenly runs into the street. if it takes the driver 0.75 s to react
An asteroid is seen in opposition from Earth once every 1000 days. What is the sidereal orbital period of the asteroid? What is the length of the semi major axis of the asteroids orbit?
A particle attached to a spring with k = 51 N/m is undergoing simple harmonic motion, and its position is described by the equation x = (6.0 m)cos(8.1t), Estimate what is the maximum speed of the particle
The objective of a telescope has a focal length of 50 cm and thefocal length of the ocular is 2 cm. What is the angular magnification of the telescope
an ideal monatomic gas is the working substance of a carnot engine. during the isothermal expansion the volume doubles.
Determine the magnitude of the force between two point charges, Q1 = -2e located at (-3.60 cm, +4.10 cm) and Q2 = -8e located at (-0.60 cm, -8.60 cm).
In the javelin throw at a track-and-field event, the javelin is launched at a speed of 28 m/s at anangle of 32° above the horizontal. As the javelin travels upward, its velocity points above the horizontal at an angle that decreases as time passes
A concave spherical mirror has a radius of 20 cm. A real object is placedon the optical axis 15 cm from the mirror. Compute where the image is and describe i
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