Astronomers believe there are something like 100 million neutron stars in the galaxy, yet we have only found about 2000 pulsars in the milky way. give several reasons these numbers are so different. explain each reason.

What is meant by the statement" the melting poin of glycerine is 13 degree celsius

An engineer designs a roller coaster so that a car travels horizontally for 152 ft, then climbs 137 ft at an angle of 34.0° above the horizontal. it then moves 137 ft at an angle of 48.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

If a balloon is taken outside on a very cold day, what will occur?