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A house painter stands 3 meter above the ground on a 5.0 meter long ladder that leans against the wall at a point 4.7 meter above the ground. The painter weighs 605 Newton and the ladder weighs 130 Newton. Assuming no friction between the house and the upper end of the ladder, obtain the force of friction that the driveway exerts on the bottom of the ladder.
A freshly prepared sample of a certain radioactive isotope has an activity of 10.0 mCi. After 4.50 h, the activity is 7.80 mCi. Find the decay constant and half-life of the isotope
What is the magnitude of the electric field. A 50-gram super ball traveling at 25m/s is bounced off a brick wall and rebounds at 22 m/s. A high speed camera records this event. If the ball is in contact with wall for 3.5 ms, what is the average acc..
A certain brand of hotdog cooker works by applying a potential difference of 142 V across opposite ends of a hot dog and allowing it to cook by means of the thermal energy produced.How much electrical energy is transferred to thermal energy.
A battery has an emf of 7.5 V and 16 A of current flows through it. What power is this battery supplying
In particular, if a 2.000Å (.2nm) photon interacts with the bound electron in an hydrogen atom (binding energy 13.6 eV) with a Compton collision. What is the energy of the scattered photon
A small plastic sphere with a charge of -5.0 nC is near another small plastic sphere with a charge of -15 nC, what is the distance between the spheres
If a 200 g ball is dropped from 100 meters what is its velocity just before it hits the ground? What is its velocity after it has fallen halfway to the ground (50m)? (neglect air resistance).
A submarine is 308 m horizontally out from the shore and 141 m beneath the surface of the water. find the height of the building
question1a diffraction grating has 3816 linescm. light that contains all wavelengths between 464 and 636 nm shines on
the hammer throw is a track-and-field event in which a 7.8-kg ball the hammer starting from rest is whirled around in a
A series RCL circuit has a resonant frequency of 2200 Hz. When operating at a frequency other than 2200 Hz, the circuit has acapacitive reactance of 5.50 ohms and an inductive reactanceof 35.0 ohms.
Long Straight Wire A long straight wire has fixed negative charge with a linear charge density of -3.1 nC/m. The wire is to be enclosed by a thin,nonconducting cylinder of outside radius 1.6 cm, coaxial with the wire.
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