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An object is placed in front of a concave mirror of focal length f = 30 cm, such that the object-to-image distance is 7 cm. The image is virtual.
Find the magnification.
A viewing window on the side of a large tank at a public aquarium measures 32 in. by 37 in. The average gauge pressure from the water is 6 psi
A parallel circuit has a 15 ohm and 24 ohm bulb in each parallel branch and a 15 ohm resistor and 293 volt battery in series with the parallel bulbs. What is the current in the 15 ohm bulb, 24 ohm bulb, and 15 ohm resistor
two coils are wound around the same cylindrical form when the current in the first coils is decreasing at a rate of
A 4kg cart is initially moving at 3m/s on a frictionless track. It then hits an incline and stops 2m later. what is the net work done on the cart
A cannon ball (m=.7 kg) traveling at 200m/s hits and is impeded into a 400 kg car. If the car was initially at rest, what will be its velocity after the impact
An aerosol can is pressured at 440kPa when it's refrigerated at 3 degree Celsius. What is the maximum safe pressure for the can
The polarizability of large atoms can be estimated by using the formula for the polarizability of a metal sphere, \(\alpha = 4\pi\epsilon a^{3}\), Estimate the induced dipole moment of an oxygen atom
A charged belt, 75 cm wide, travels at 25 m/sbetween a source of charge and a sphere. The belt carries chargeinto the sphere at a rate corresponding to 100 µA. Compute the surface charge density on the belt.
A screw thread is cold rolled on a 1015 low-carbon steel bolt of 6.25 mm diameter. Observation shows that the length of the contact zone between die and screw blank is L = 1.25 mm. The average strain hardening during rolling corresponds to a strain o..
Anna walks 37 m due north, 90 m due east, and then 57 m due south. What is the direction (angle in degrees) of her net displacement as measured from the x axis
A cylindrical tank of 1.6 m in radius rests atop a platform 6.0 m high. Initially the tank is full with water to a depth of 3.0 m. A plug whose area is 6.3 cm2 is removed from the orifice in the side of the tank at the bottom, How far in the horizont..
An ideal gas in a piston is placed in a refrigerator, which removes 525 J of energy from the gas via cooling. The plunger on the piston is pushed down, which does 121 J of work on the gas. What is the net change in the internal energy of the gas in..
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