Need Help Decades later another astronaut repeats the same experiment on Mars, dropping a hammer
and a feather simultaneously from a height of 1.00 m. Mars does have an atmosphere but it is
so thin we can neglect it for this calculation so both the hammer and feather hit the ground at
the same time. The acceleration of gravity on Mars is 38% that of the Earth.
a) How long do they take to hit the ground?
b) What is their velocity just before they hit the ground?

An ambulance emits a frequency of 450 hz from its siren. what frequency is heard by a man as the ambulance moves toward him? less than 450 hz more than 450 hz 450 hz 0 hz

1. how to locate the image in converging(concave) mirror and diverging (convex) mirror with salt. 2. how to locate the image in a converging (convex) lens and diverging (concave) lens with salt.

During the experiment if you could triple the breakaway magnetic force with all other quantities left unchanged, what is the new value for the critical velocity if it was v0 (initial velocity), initially? (b) now if you halved the radius with all other quantities left unchanged, what is the new critical velocity if it was v0 (initial velocity), initially? (c) if during the experiment, critical velocity quadrupled with all other quantities left unchanged, what is the new breakaway force if its magnitude was initially f0,?