Which statements about fresh water and salt water are true? check all that apply.

a pond is a source of salt water.
fresh water is essential to all life on earth.
half of earth’s water is fresh water.
most of earth’s water is stored in the oceans.
oceans are the largest source of fresh water.

answers are b and d
fresh water is essential to all life on earth.
most of earth’s water is stored in the oceans.

Which feature of a heating curve indicates a change ofn state

Starting with only the balmer series light (visible light), how could we ensure that the solar panels generate a current that mark can use for his power station? a)by gradually increasing the brightness (amount) of light that we shine on it. b)by gradually increasing the frequency of the light we shine on it. c)by gradually increasing the wavelength of the light that we shine on it.

Amass attached to a spring is displaced from its equilibrium position by 5cm and released. the system then oscillates in simple harmonic motion with a period of 1s. if that same mass–spring system is displaced from equilibrium by 10cm instead, what will its period be in this case? a mass attached to a spring is displaced from its equilibrium position by and released. the system then oscillates in simple harmonic motion with a period of . if that same mass–spring system is displaced from equilibrium by instead, what will its period be in this case? a) 0.5sb) 2sc) 1sd) 1.4s