3. While looking through a drawer a person touches a sharp object and quickly moves their hand away. Which body systems have worked
together to move the hand away from the sharp object? *
A-The immune system senses pathogens from the sharp object and sends a message
to the nervous system to move the hand away.
B-The nervous system senses pain from the sharp object and sends a message to the
skeletal system to move the hand away.
C-The nervous system senses pain from the sharp object and sends a message to the
muscular system to move the hand away.
D-The immune system senses pathogens from the sharp object and sends a message
to the muscular system to move the hand away.

Consider the motion of the balloon and its air contents in terms of momentum. in step 1 above, the total momentum of the balloon and its contents was zero. recall that momentum = mv. both the balloon and the air inside it had a velocity of zero and therefore the total momentum was zero. now think about what happened when the air escaped from the balloon. a certain mass of air accelerated in one direction. in order to keep the total momentum of the system zero, the balloon itself (which has mass) had to accelerate in the opposite direction. use this scenario to you explain why the soda can rotates when the water squirts out of the escape holes. what was your hypothesis concerning the water-filled can? according to your data, do you think your hypothesis was correct? (be sure to refer to your data when answering this question.) summarize any difficulties or problems you had in performing the experiment that might have affected the results. describe how you might change the procedure to avoid these problems. give at least one more example of newton's third law in everyday life.

Describe characteristics of a good respitory surface

Which statement describes how favorable traits in a population relate to natural selection? they are the only traits that ever exist in the population. they build in the population over time. they are rarely passed on to offspring. they are found only in a few individuals within the population.