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In the static equilibrium experiment, a student placed the 109.8 g mass (including the hanger mass) at position of 12.3 cm from the fulcrum (on the left side). Then, placed a 58.4 g mass (including the hanger mass) on the right side of the fulcrum and adjusted the position until balance is achieved. Calculate the torque caused by the 58.4 g mass. Include the sign.
After the collision, the velocity of the ball which was originally at rest is + 2.38 m/s. What is the velocity of the 0.250 kg ball?
The heaviest and lightest strings on a certain violin have linear densities of 3.7 and 0.28 g/m. What is the ratio of the diameter of the heaviest string to that of the lightest string, assuming that the strings are of the same material?
A battery with potential of 1.50 V is in a circuit with 9.7 milliamps flowing. What is the power output of the battery?
As part of a class project you are given 0.900 g of copper and asked to fabricate a wire with uniform cross-section. What length of wire do you end up with
A small charged bead has a mass of 2.0g . It is held in a uniform electric field E? = (200,000 N/C, up). What is the charge on the bead
A test rocket is firedvertically upward from a well. A catapult gives it an initial speedof 79.8 m/s at ground level. Its engines then fire and itaccelerates upward at 4.10 m/s2 until it reaches an altitude of1060 m.
A single-DOF electrical system has its time-domain coordinate transformed into the Laplace domain as X(s) = (3s2+ 7s + 3)/[s2 (s2 + 2s + 0.006)].
An experimentalist wishes to probe the nucleus which can be approximated as a hard sphere having a radius of 10^-13 cm. How large must the probe beam intesity be if the target consists of 10^10 nuclei
A parallel-plate capacitor with circular plates of radius R is being charged. The change of electric field is given by dE/dt=1.5E12 V/(mS). The field magnitude B for r=5R is 1E-7 T.
Now, a second resistor R2 of 3.2x10^5 ? is connected in parallel to the existing resistor in the circuit, What will be the new time constant
A child holds a candy bar 10.0 cm in front of a convex mirrorand notices that the image is only one-half the size of the candybar. What is the radius of curvature of the mirror?
A 0.75 kg cart has been attached to a spring. The cart is moved to the right by 2.0 cm. What is the elastic potential energy stored in the spring
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