A sock stuck to the side of a clothes-dryer bar-
rel has a centripetal acceleration of 25 m/s2.
If the dryer barrel has a radius of 25 cm,
what is the tangential speed of the sock?
Answer in units of m/s.

please help
I am confused

When the magnetic domains in a material can be aligned, but eventually drift out of alignment, the material is

Ahot-air balloon takes off from the ground traveling vertically with a constant upward acceleration of magnitude g/4. after time interval δt, a crew member releases a ballast sandbag from the basket attached to the balloon. how many seconds does it take the sandbag to reach the ground? (express your answer in terms of δt)

Ascientist notices that an oil slick floating on water when viewed from above has many different colors reflecting off the surface, making it look rainbow-like (an effect known as iridescence). she aims a spectrometer at a particular spot and measures the wavelength to be 750 nm (in air). the index of refraction of water is 1.3