520/5000

State the hypotheses of the causes of why: of each of the following alternatives.

A) automobile (without gasoline and without brake) slows down and stops;
b) a book that slides on the table slows down and stops;
c) a falling chalk increases its speed until it hits the ground;
d) a ball rolling down a slope increases its speed until it reaches the lowest part;
e) The Moon moves around Earth and moves with approximately constant speed.

Part two:

Design an experiment where you check that the acceleration coincides with the direction of the resulting force.

CompTIA Linux+ Guide to Linux Certification (4th Edition)(Please do not do it in a mac and add pictures of the machine.)

Project 2-6 In this hands-on project, you properly shut down your Linux system.

1. Press CtrlþAltþF2 to switch to a command-line terminal (tty2), and then log in to the terminal using the user name of root and the password of LNXrocks!.

2. At the command prompt, type poweroff to shut down your Linux system immediately. Which commands from Table 2-9 can also be used to shut down your Linux system?

1. To which class do collagen fibers belong? ___________________________

2. What is the monomer for this class of organic molecules? _____________________

3. With what type of reaction breaks down a polymer of this class into monomers? _______________________________

4.Osteoclasts are able to produce the components of a substance that lowers the pH of the surrounding matrix and breaks down hydroxyapatite.

A. proteoglycan

B. sodium chloride

C. alkaline mucus

D. hydrochloric acid

5. list two substances that osteoblast cells should be able to produce:   ______________________________ and ____________________________.

6.Osteoclasts produce an enzyme that break down collagen fibers, what is the name?

Carlos and Shannon are sledding down a snow-covered slope that is angled at 12.0° below the horizontal. When sliding on snow, Carlos’s sled has a coefficient of friction μ_k = 0.100; Shannon has a “supersled” with μ_k = 0.0100. Carlos takes off down the slope starting from rest. When Carlos is 4.00 m from the starting point, Shannon starts down the slope from rest.

How far have they traveled when Shannon catches up to Carlos?

How fast is Shannon moving with respect to Carlos as she passes by?

Problem 2: In Multi-Effects Desalination (MED) system composed of 4 effects, and 3 feed preheaters and down condenser. List the following: a- The mass balance in the evaporator, feed preheater and down condenser b- The energy balance in the evaporator, feed preheater and down condenser c- The Material balance in the first effect d- The temperature profile of the feed if the intake temperature is 25ºC and temperature of last effect is 40ºC and the temperature of first effect is 60ºC e- What will happen to the transfer area of the evaporator if the motive steam temperature is increased to 100ºC where the rest is remaining constants.

In Multi-Effects Desalination (MED) system composed of 4 effects, and 3 feed
preheaters and down condenser. List the following:
a- The mass balance in the evaporator, feed preheater and down condenser
b- The energy balance in the evaporator, feed preheater and down condenser
c- The Material balance in the first effect
d- The temperature profile of the feed if the intake temperature is 25ºC and
temperature of last effect is 40ºC and the temperature of first effect is 60ºC
e- What will happen to the transfer area of the evaporator if the motive steam
temperature is increased to 100ºC where the rest is remaining constants.

Self-talk is what we tell ourselves in the privacy of our own thoughts. It can be a powerful way of uplifting yourself or a dangerous way of hurting yourself. It is important to give ourselves positive messages on a daily basis (positive affirmations). a) If you have a recurring negative thought about yourself, write it down and examine it closely. Write down why you think this about yourself. b) Write down real life examples of why the negative thoughts may be distorted. If you still think they are true, then write about something you feel really good about and explain why you feel good about this. Write down two different positive messages (affirmations) you can use with your breathing to give yourself a lift. Affirmations are usually short and to the point. Make sure they work for you and don’t make you feel worse.

Suppose data were collected on the number of customers that frequented a grocery stores on randomly selected days before and after the governor of the state declared a lock down due to COVID 19. A sample of 6 days before the lockdown were chosen as well as 6 days randomly chosen after the lock down was in place. The number of shoppers each day were as follows:

This is interval/ratio data because they are characteristics of the days.

1. Calculate accountable, unaccountable, and total variation. Show your work.
2. Eta square is accountable variation divided by total variation. Determine eta square. It is interpreted as the variation in the dependent variable that can be accounted for by the independent variable. Describe eta square in terms of this problem.

5. In math class, a student has written down a sequence of 16 numbers on the blackboard. Below each number, a second student writes down how many times that number occurs in the se‐ quence. This results in a second sequence of 16 numbers. Below each number of the second se‐ quence, a third student writes down how many times that number occurs in the second se‐ quence. This results in a third sequence of numbers. In the same way, a fourth, fifth, sixth, and seventh student each construct a sequence from the previous one. Afterward, it turns out that the first six sequences are all different. The seventh sequence, however, turns out to be equal to the sixth sequence.

   Give one sequence that could have been the sequence written down by the first student. Explain which solution strategy or algorithm you have used.

You and your friend go sledding. Out of curiosity, you measure the constant angle θ that the snow-covered slope makes with the horizontal. Next, you use the following method to determine the coefficient of friction µk between the snow and the sled. You give the sled a quick push up so that it will slide up the slope away from you. You wait for it to slide back down, timing the motion. It turns out that the sled takes four times as long to slide down as it does to reach the top point in the round trip. In terms of θ, what is the coefficient of friction? draw a free body diagram for the sled going up the slope and another for the sled coming down the slope, show all work and explain in 1 - 2 sentences why it takes longer for the sled to slide down the slope than to go up the slope