1) Refer to the Newsela article "A Step-by-Step Guide to the Scientific Method."

Part A

Which statement is a central idea of the text?

The scientific method is based on observations.

The scientific method is based on reading scientific journals.

Scientists generate guesses in the scientific method.

Variables are sometimes used in the scientific method.

Question 2
Part B

Which detail from the text best supports the answer in Part A?

Hypotheses are ideas about what might happen.

Scientists share their results in journals and papers.

Experiments produce evidence for scientific ideas.

Conditions change in different experiments.


2)
Refer to the Newsela article "How You Can Make a Solar Oven To Cook with a Pizza Box."

What is the author's purpose in mentioning variables in designing the solar oven?

to show the author did not think too hard about the design

to show how easy it is to produce solar energy

to explain how wasteful solar energy production can be

to encourage readers to vary the design


3)
Refer to the Newsela article "How You Can Make a Solar Oven To Cook with a Pizza Box."

How does the text make a connection between the solar oven and a barbecue?

A solar oven is categorized as a barbecue.

The solar oven and a barbecue have the same design.

The author contrasts the solar oven with a barbecue.

A solar oven is used outdoors just like a barbecue.

(10 points for each question, pls help meh {NnN})

1. read the following excerpt from franklin d. roosevelt's "fireside chat 19":

on the other side of the picture, we must learn also to know that guerilla warfare against the germans in, let us say serbia or norway, us; that a successful russian offensive against the germans us; and that british successes on land or sea in any part of the world strengthen our hands.

remember always that germany and italy, regardless of any formal declaration of war, consider themselves at war with the united states at this moment just as much as they consider themselves at war with britain or russia. and germany puts all the other republics of the americas into the same category of enemies. the people of our sister republics of this hemisphere can be honored by that fact.  

the true goal we seek is far above and beyond the ugly field of battle. when we resort to force, as now we must, we are determined that this force shall be directed toward ultimate good as well as against immediate evil. we americans are not destroyers — we are builders.

analyze the effectiveness of this excerpt. how does it function within the speech as a whole? how does the structure of the excerpt to convey the speech's purpose and key points? support your argument with evidence from the speech. (10 points)

i think it's either 'to expose the corruption of the communists in russia', or 'to criticize animal brutality by communists in russia.'  

hope this ! : )

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation:

c) eager anticipation.