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Two positively charged skaters, Stacy and Bob, are traveling straight towards each other on frictionless ice. Consider them to be point charges. When they are 5.0 m apart, Stacy feels an attractive electric force of 2.2 N towards Bob. (a) What is the magnitude of the attractive force that Bob feels from Stacy? (b) The magnitude of Stacy's charge is twice as much as Bob's. What is the magnitude of Bob's charge? (c) Bob has twice the mass that Stacy does. At the instant that they are 5.0 m apart, from Bob's reference frame, Stacy appears to be moving towards him with an acceleration of 7.3×10-2 m/s2. Find Stacy's mass.
A penny slides off a table 30in high and falls straight to the floor. How long does it take for the penny to fall
A grating is made of five similar, uniformly spaced, narrow slits. For light of wavelength ? = 675 nm perpendicularly incident on the slits, What is the angular position of the first principal order when the first and fifth slits are covered
Two steel guitar strings have the samelength. String A has a diameter of 0.50mm and is under 440.0 N oftension. Find the ratio of the wave speeds, Va/Vb, in these twostrings
Two boxes (m1 = 46.0kg and m2 = 29.0kg ) are connected by a light string that passes over a light, frictionless pulley. Find the acceleration of each box
The owner of a van installs a rear-window lens that has a focal length of -0.299 m. When the owner looks out through the lens at a person standing directly behind the van, How tall is the person
A neon sign in a shop operates at around 12 kV (rms). A transformer is to step-up the 120 V (rms) line voltage to that value. How many turns must be placed into the primary coil
A cook puts 8.20 g of water in a 2.00-L pressure cooker that is then warmed to 470°C. What is the pressure inside the container
a 184x astronomical telescope is adjusted for a relaxed eye when the two lenses are 1.20 m apart. what is the focal length of the objective
When monochromatic light shines perpendicularly on a soap film (n = 1.33) with air on each side, What is the vacuum wavelength of the light in nm
An object with mass 3.2kg is executing simple harmonic motion, attached to a spring with spring constant 260N/m, Calculate the maximum speed attained by the object
In an LC circuit in which C = 4.0?F the maximum potential difference across tha capacitor during the oscillations is 1.5V and the maximum current through the inductor is 50 mA.
A vertical solid-steel post 26.0 cm in diameter and 2.53 m long is required to support a load of 8200 kg. What is the strain in the post and the change in the posts' length when the load is applied
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