The center of mass of a 0.3 kg (non-uniform) meter stick is located at its 46-cm mark. what is the magnitude of the torque (in nm) due to gravity if it is supported at the 25-cm mark? (use g = 9.79 m/s2)

suppose that a meter stick is balanced at its center(50 cm mark). a 0.27 kg mass is then positioned at the 20 cm mark. at what cm mark must a 0.30 kg mass be placed to balance the 0.27 kg mass?

The membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space. assume that the membrane acts like a parallel plate capacitor in which the effective charge density on the inner and outer walls has a magnitude of 7.0 × 10-6 c/m2. (a) what is the magnitude of the electric field within the cell membrane? (b) find the magnitude of the electric force that would be exerted on a potassium ion (k+; charge = +e) placed inside the membrane.

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Astone is dropped from the upper observation deck of a tower, 250 m above the ground. (assume g = 9.8 m/s2.) (a) find the distance (in meters) of the stone above ground level at time t. h(t) = (b) how long does it take the stone to reach the ground? (round your answer to two decimal places.) s (c) with what velocity does it strike the ground? (round your answer to one decimal place.) m/s (d) if the stone is thrown downward with a speed of 2 m/s, how long does it take to reach the ground? (round your answer to two decimal places.) s