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Please help physics problem? I'm really stumped. please help me please . PHYSICS!!

A huge wheel-spaced space station with a radius of 250 m. It spins about its center in order to simulate a sense of artificial gravity for people walking on its inside edge. People feel an apparent gr

What is the magnitude of electric field between +20 and +140V equipotential surfaces

--------------------------- +20V15cm --------------------------- +8015cm --------------------------- +140 The distance between the surfaces is 15cm. I just want the answers for this question.-(140-20

Kinetic friction problem

A 1.34-kg block slides across a rough surface such that it slows down with an acceleration of 1.19 m/s2. What is the coefficient of kinetic friction between the block and the surface? I used F= M x a

Please help me !! physics , it's killing me, please help!!! Physics!!

A stadium wave takes about 11 seconds to complete one cycle around the arena. The radius of the arena is 31 m. what is the angular speed of the wave? a) 0.57 rad/second b) 0.83 rad/second c) 1.1 ra

Which lens would you use

You have one of each of the following lenses, all large diameter: f= 50mm, f= 100mm, f= 200mm, f= 25mm, f= -50mm. Which of them would you use, and why (ignoring aberrations) if you were making: a. a

Can someone help me with physics

A turntable of mass 5.00 kg has a radius of 0.094 m and spins with a frequency of 0.532 rev/s. What is its antique momentum? Assume the turntable is a uniform disk. ______ kg m^2/s I got 0.012 but i

I have a physics question

A figure skater is spinning at a rate of 1.6 rev/s with her arms outstretched. She then draws her arms in to her chest, reducing her rotational inertia to 65% of its original value. What is her new ra

A block slides down a frictionless plane having an inclination of 15.6°. If the block starts from rest at t

A block slides down a frictionless plane having an inclination of 15.6°. A) If the block starts from rest at the top and the length of this incline is 2.30 m, find the acceleration of the block. B)

What is wrong with this k constant

I used two methods the find k constant from the SAME spring. I used f=k(y-yo) and for oscillation T=2pie*sqr.root mass/k. I got really OFF answers for the two k constants, what did I do wrong? First

What was the difference between Davisson and Germer's experiment with nickel crystals and Thomson's experiment

The experiments that were conducted in 1927 to verify de Broglies idea.... Both used beams of electrons fired into a crystal to find a diffraction pattern. My book emphasizes that Thomsons passed ele

Physics Help..................

A 17 cm long spring is attached to the ceiling. When a 1.8 kg mass is hung from it, the spring stretches to a length of 22 cm (a)What is the spring constant k? (b)How long is the spring when a 3.2 kg

A duck is floating on a lake with 25% of its volume beneath the water. What is the average density of the duck

Please show all steps! Thanks :)-the average density of the duck =d, volume =V average density of water = 1000 kg/m^3 weight of duck = dV * 9.81 = weight of water displaced = 0.25* V * 1000 * 9.81 dV

A duck is floating on a lake with 25% of its volume beneath the water. What is the average density of the duck

Please show all steps! Thanks :)-the average density of the duck =d, volume =V average density of water = 1000 kg/m^3 weight of duck = dV * 9.81 = weight of water displaced = 0.25* V * 1000 * 9.81 dV

(10 POlNTS) Multiple choice questions, PLEASE HELP

To lift a load of 100 N, the load arm is 50 cm and the input arm is 200 cm. How much force must be applied? A) 20 N B) 25 N C) 100 N D) 50 N To lift a load of 100 N, the load arm is 100 cm and the

Varying Vacuum Pressure

I understand a vacuum is void of any matter. But is it possible for a vacuum to have greater pressure buy removing even less matter from nothing? For example, say I have a metal container (hypothetica
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