A positively charged object is brought near but not in contact with the top of an uncharged gold leaf electroscope. The experimenter then briefly touches the electroscope with a finger. The finger...

A positively charged object is brought near but not in contact with the top of an uncharged gold leaf electroscope. The experimenter then briefly touches the electroscope with a finger. The finger...

What volume of iron (density 7.87 g/cm3) would be required to balance a 1.00 cm3 sample of lead (density 11.4 g/cm3) on a two-pan laboratory balance?

Find the electric field vector at the origin due to an infinitely long, straight line bearing a uniform linear charge density of 360 fC/m. The line charge is tilted at π/4 radians such that it runs...

A slab of nonconductive material is perpendicular to the z-axis, centered on the origin, has a total thickness of 40 mm, and is infinite along the other two axes. It has a uniform volumetric charge...

An infinite number of identical charged rings of radius w and charge Q are arranged coaxially along the z- axis such that each adjacent pair is a distance w apart and one lies with the origin in its...

Derive a symbolic expression for the speed v at which a particle of charge -Q and mass m must move to hold itself in a circular orbit of radius r centered on a massless particle of charge 4Q that...

I'm editing this problem because I was able to get a couple of the answers, but I still need help on the rest. An electromagnatic wave is traveling in vacuum with frequency 7 x 1014 Hz. The wave has...

C1 and C2 are capacitors in parallel. C3 is in series with C12. C1=16.6 microF, C2=8.2 microF, C3=0.3 microF. A 1.52 V battery is connected in this combination. Find the charge stored...

A ball is thrown upward with an initial velocity of 19.6m/s.what is the max height the ball will reach before falling back down? Just want to check if my answer is correct, I ended...

If I wanted to build a 27ft jump how do i bu it and how fast do i hit it

A phonograph turntable driven by an electric motor accelerates at a constant rate (i.e., constant angular acceleration) from 0 to 33.33 revolutions per minute in 2 minutes. The turntable is a...

Object A emits most strongly at 400 nm, while object B emits most strongly at 800 nm. What can we say about their relative temperatures? A’s temperature is the same as B’s. Nothing. Temperature...

A spring requires a force of 25 N to produce an extension of 2 cm in it. What is the work done in further extending it by 3 cm.

A flagpole consists of a flexible, 4.79 m tall fiberglass pole planted in concrete. The bottom end of the flagpole is fixed in position, but the top end of the flagpole is free to move. The wave propagation...

a 5 kg box with a velocity of 10m/s will attach inelastically to a 5 kg box and then both boxes will attach to a 5kg box which has a velocity of 5m/s to the left. what is the end velocity

Calculate the rest energy and the kinetic energy of: a) A 100g ball travelling with the speed of 100m/s b) An electron travelling at a speed of 0.999c. Which one has greater...

1) Blood flows through an artery that is partially blocked. As the blood moves from the wider region into the narrow region, the blood speed: a) Alternately increases then decreases b)...

I need to find the air resistance. the helicopter was flying back from the fire

Two boxes of masses m1 and m2 are descending vertically at a constant acceleration a =g/11; they are attached by a string of negligible mass and the upper box is attached to a second string. What...

How can you manage to skip a flat stone over water? How can you increase the number of skips? Explain how this works and how it was used in WW2 in a squadron called the Dam Busters?