Me plz 30 point and a mark how do humans and animals obtain the nitrogen their bodies need to make proteins and nucleic acids? question 1 options: by breathing the nitrogen present in the atmosphere by consuming plants or other animals by absorbing nitrogen found in the soil by absorbing ammonia from bacteria growing in the roots of plants how do decomposers affect the carbon cycle? question 3 options: they release the carbon that remains in the bodies of dead organisms. they change carbon dioxide into a form that organisms can use. they absorb carbon from carbon dioxide in the atmosphere. they prevent carbon from escaping into the atmosphere. hich of the following processes does not produce carbon dioxide? question 4 options: decomposition photosynthesis burning fossil fuels cellular respiration how does the carbon in grass become part of a lion? question 5 options: the lion eats an herbivore that ate the grass. the lion eats the grass. carbon from grass doesn't end up in a lion. the lion breathes in carbon that was released by the grass.

Amass m = 74 kg slides on a frictionless track that has a drop, followed by a loop-the-loop with radius r = 18.4 m and finally a flat straight section at the same height as the center of the loop (18.4 m off the ground). since the mass would not make it around the loop if released from the height of the top of the loop (do you know why? ) it must be released above the top of the loop-the-loop height. (assume the mass never leaves the smooth track at any point on its path.) 1. what is the minimum speed the block must have at the top of the loop to make it around the loop-the-loop without leaving the track? 2. what height above the ground must the mass begin to make it around the loop-the-loop? 3. if the mass has just enough speed to make it around the loop without leaving the track, what will its speed be at the bottom of the loop? 4. if the mass has just enough speed to make it around the loop without leaving the track, what is its speed at the final flat level (18.4 m off the ground)? 5. now a spring with spring constant k = 15600 n/m is used on the final flat surface to stop the mass. how far does the spring compress?