Physics, 31.05.2020 16:57 tiffanibell71

During last year’s diving competition, the divers always pull their
limbs in and curl up their bodies when they do flips. Just before
entering the water, they fully extend their limbs to enter straight down
as shown.
Explain the effect of both actions on their angular velocities and
kinetic energy (support your answer with working). Also explain the
effect on their angular momentum.

Answers: 1

Show answers

Another question on Physics

Physics, 22.06.2019 14:30

Exercise 2. find the wavelength of a photon emitted when an electron jumps from the n = 3 energy level down to the n = 2 energy level. where is this photon in the electromagnetic spectrum?

Answers: 3

Answer

Physics, 22.06.2019 23:40

Certain bacteria (such as aquaspirillum magnetotacticum) tend to swim toward the earth’s geographic north pole because they contain tiny particles, called magnetosomes, that are sensitive to a magnetic field. if a transmission line carrying 100 a is laid underwater, at what range of distances would the magnetic field from this line be great enough to interfere with the migration of these bacteria? (assume that a field less than 5% of the earth’s field would have little effect on the bacteria. take the earth’s field to be 5.0 * 10-5 t, and ignore the effects of the seawater.)

Answers: 1

Answer

Physics, 23.06.2019 00:10

An electromagnetic wave with frequency 65.0 hz travels in aninsulating magnetic material that has dielectric constant 3.64 andrelative permeability 5.18 at this frequency. the electric fieldhas amplitude 7.20 \times 10^{ - 3} {\rm v}/{\rm m}. a. what is the speed of propagation of the wave? b.what is the wavelength of the wave? c.what is the amplitude of the magnetic field? d.what is the intensity of the wave?

Answers: 3

Answer

Physics, 23.06.2019 01:30

Acyclotron is used to produce a beam of high-energy deuterons that then collide with a target to produce radioactive isotopes for a medical procedure. deuterons are nuclei of deuterium, an isotope of hydrogen, consisting of one neutron and one proton, with total mass 3.34×10−27kg. the deuterons exit the cyclotron with a kinetic energy of 6.40 mev .a-what is the speed of the deuterons when they exit? b-if the magnetic field inside the cyclotron is 1.25 t, what is the diameter of the deuterons' largest orbit, just before they exit? c-if the beam current is 350 μa how many deuterons strike the target each second?

Answers: 3

Answer

You know the right answer?

During last year’s diving competition, the divers always pull their
limbs in and curl up thei...

Questions