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A copper cup of mass 0.300 kg contains 1.00 kg of water at 315 K. It is cooled so that the temperature decreases by 2.50 K each minute. What is the rate of removal of thermal energy in watts? The specific heat of water is 4186 J/kgC and the specific heat of copper is 387 J/kgC?
A 2.30-g bullet embeds itself in a 1.40-kg block, which is attached to a spring of force constant 780N/m, Find the time for the bullet-block system to come to rest
A horizontal spring-mass system oscillates on a frictionless table. If the mass is 3.8 kg, the spring constant is 100 N/m, find the maximum extension of the spring
A 69.00 kg skier is going down a slope oriented 33° above the horizontal. The area of each ski in contact with the snow is 0.13 m2. Determine the pressure that each ski exerts on the snow.
Compute the average acceleration of car and lizard and the final velocity of a Ferrari.
A screen is placed 1.20m behind a single slit. The central maximum in the resulting diffraction pattern on the screen is 1.40cm wide-that is, find the distance between the two second-order minima
A cylindrical air capacitor with a length of 15.6m stores an amount of energy equal to 3.30×10?9J, Calculate the ratio of the radii of the inner and outer conductors
An electric water heater operates at 66 A and 16 kilowatts, Calculate N (the total number of resistors) and the cost of manufacturing the heating element if in a pack of 100 resistors cost $0.50
Estimate the area of the plates needed to achieve a capacitance of 1 F, given the same air gap, What is the electric field between the plates
A 8.00-cm-long wire is pulled along a U-shaped conducting rail in a perpendicular magnetic field. How big is the pulling force
A man throws a baseball straight up in the air at 19.6 m/s. How many seconds does it take to reach the top
A cart is moving horizontally along a straight line with constant speed of 30 m/s. At what speed(relative to the cart), and angle must the projectile be fired
In order to decrease the intensity of a beam of unpolarized light to 10% of its original intensity using two polarizers, find the angle between the transmission axes of the two polarizers
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