In order for organisms to stay alive and continue their species, they must overcome many challenges. Which of these is NOT one of the three challenges of life?

Question 1 options:

getting energy

reproducing

regenerating

staying healthy

Which statement best defines open system. a) Open systems allows nothing to go in or out of the system. b) Open systems allows something to go in and out of the system. c) Open systems cannot give or take at all with another system

What happens when a sound wave passes from water into air

An electron moves at some arbitrary angle to the magnetic field direction (B is in + zˆ direction). The trajectory is a helix with some pitch d. Considering the velocity of an electron in XY plane v and in + z direction vz find d.

do you think companies should be required to disclose ingredients in their chemicals if there are environmental concerns? Explain why or why not? Use at least 3 pieces of evidence

Wood has 4 times the heat capacity as steel. If I add the same amount of heat to the same amount of steel and wood, I find the temperature of the steel increases to 40°C. What is the temperature of the wood?

An elevator weighing 15000 newtons s raised in 50 seconds. If the distance between stories is 3.0 meters how much power is required of the motor?

Given the diamond shape of a baseball field and the speed with which baseballs are hit, why is it harder for a hitter to hit a homerun to center field than to right or left field? (Consider the effect of air drag on fast moving projectiles.)

What is the arrangement of the forms of electromagnetic radiation according to their wavelengths?

A helium atom consists of two protons, two electrons, and two neutrons. In the helium atom, the strong force is a fundamental interaction between the (1) electrons, only (2) electrons and protons (3) neutrons and electrons (4) neutrons and protons

What is the term for water droplets that have accumulated in the air until they have become so heavy they have fallen back to earth?