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An object 3.28 cm high is placed 11.2 cm in front of a convex mirror with radius of curvature of 8.48 cm. Where is the image formed. Take a positive answer to be in front of the mirror, and a negative answer to be behind the mirror.
What is the mass in grams of 1L of helium gas as STP? (Find moles and then convert moles to grams; atomic mass =4.0grams/mol), Why do helium balloons float
a stone with a mass of 0.80 kg is attached to one end of a string 0.90 m long. Find the maximum speed the stone can attain without breaking the string
A point mass m starts from rest and slides down the surface of a frictionless solid sphere of radius r. Find the angle at which the mass flies off the sphere
You are standing 5 m from a tractor when the operator starts it ip the intensity is 3 x10^-5 W/m^2. How much did the sound level change
A bat hits a moving baseball. If the bat delivers a neteastward impulse of 1.3 N-s and the ball starts with an initialhorizontal velocity of 3.8 m/s to the west, what is the mass of the ball
A monatomic ideal gas ( = 1.67) is contained within a box whose volume and pressure are 3.1 m3, Find the speed of sound in the gas
A Carnot engine has an efficiency of 0.361, and the temperature of its cold reservoir is 406 K. (a) Determine the temperature of its hot reservoir. (b) If 5950 J of heat is rejected to the cold reservoir, what amount of heat is put into the engine..
An electric power station is producing 1.60 × 103 W of power that is to be sent to a small town located 13 km away, Find the power lost in heating the wires
A horizontal beam of electrons initially moving at 4.2 107 m/s is deflected vertically by the vertical electric field between oppositely charged parallel plates, What is the charge per unit area on the plates
A comet orbits the sun in a strongly elliptical orbit. The comet and star are far apart from other massive objects. what kind of energy does your system have
If the Earth were to suddenly stop revolving around the Sun the gravitational force that the Sun exerts on the Earth would cause the Earth to "fall" directly into the Sun
A grandfather clock has a brass pendulum with a period of 1 sec at 20C. in the summer, the temperature of your house rise by 5 C. By how much does the period of the pendulum change
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