Which statement indicates that motion has occurred? A. The reference point has changed.

B. The position of the object has changed.

C. The object has not changed.

D. The object being described has changed

The charge on an electron is 1.60218 × 10−19 c and its mass is 9.10939 × 10−31 kg. how strong a magnetic field must be experienced by the electron if its path is a circle of radius 5.5 cm? answer in units of t.

By what factor does the drag force on a car increase as it goes from 65 to 110 km/h?

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