an astronaut is said to be weightless when he/she travels in a satellite. does it mean that the earth does not attract him/her?

Aturntable a is built into a stage for use in a theatrical production. it is observed during a rehearsal that a trunk b starts to slide on the turntable 10 s after the turntable begins to rotate. knowing that the trunk undergoes a constant tangential acceleration of 0.31 m/s2, determine the coefficient of static friction between the trunk and the turntable.

Why should the wavelength scale of spectroscope be calibrated

Which planets are visible without a telescope