The restoring force a bow provides to an arrow as it is pulled back can be modeled as a spring force. The great archer Gila “nocks” an 18-g arrow by pulling it back a distance of 45 cm. Gila fires the arrow horizontally from a small cliff with a height of 15 m, and when the arrow reaches the bottom, it has a speed of 63 m/s. What is the effective spring constant of the bow as Gila nocks the arrow?

Hecelina drives her horse to pull her wagon up a long, shallow hill. The horse and wagon together have a mass of 1600 kg, and the horse provides a constant force of 1000 N directing the wagon up the hill. The hill rises a vertical distance of 8.0 m, and the hill is 85 m long along the slope. With what starting speed must Hecelina drive her horses so that they barely make it to the top of the hill before stopping? Neglect any drag forces.

Hecelina drives her horse to pull her wagon up a long, shallow hill. The horse and wagon system have a mass of 1600 kg, and the horse provides a constant force of 1000 N directing the wagon up the hill. The hill rises a vertical distance of 8.0 m, and the hill is 85 m long along the slope. With what starting speed must Hecelina drive her horses so that they barely make it to the top of the hill before stopping? Neglect any drag forces.

A team of six people work to lift a platform of cargo with a mass of 300 kg up a cliff with a single rope and pulley. If the cargo moves with a constant speed of 0.75 m/s, how much power must each person provide?

Deadeye Martin fires a 18-g arrow at a speed of 40 m/s at a 150-g apple tossed into the air by his friend Jaquette. If the arrow arrow travels straight through the apple at the peak of the apple’s trajectory, and the apple’s speed is 1.8 m/s after the collision, what is the speed of the arrow immediately after hitting the apple?

Bacteria that have flagella at both poles of the cell are described as amphitrichous.

As you know, biochemistry is essential for the process of life and can be found in all living cells, from microbe to human. Please list the four classes (families) of biomolecules. For each biomolecule (AKA Macromolecule), list its building block (monomer) and the type of chemical bond formed. Lastly, provide the major functions of each biomolecule in a typical living cell.

Robert Koch helped establish the germ theory of disease by discovering that anthrax was caused by a disease. After he isolated and purified the same bacteria from several diseased animals, what would be the next step in order to show that this bacteria caused anthrax?

Imagine that you are a research scientist and have recently discovered a method to engineer a bacteria from simple biomolecules that will change science forever. You are well on your way to receiving the Nobel Prize but you first must prove that it works. You want to design a pathogenic bacteria but are deciding whether to design it as a Gram-positive or Gram-negative bacteria. Which one would decide to make? Why? Fully justify your answer with what you have studied about Gram-positive versus Gram-negative bacteria.

What happens when you place a bacterial cell into a hypertonic solution?