What force is required to stretch a spring of spring constant 450 N/m by 0.25?

As , plants meet their needs for making food from air, soil, water, and the sun's energy in a process called there are plants called grow high in trees without here are words to put in the blanks. 1.) producers 2.) consumers 3.) chloroplasts 4.) epiphytes

Which type of wave can travel without a medium

1.what is where an object is located 2. what is how fast an objects speed is changing 3. what is how fast an object is moving