Recent activity by Hartmut Pfitzinger

Recent activity by Hartmut Pfitzinger

Acetylene torches are used for welding but the thermite reaction can be useful in situations in which acetylene torches are inappropriate. The thermite reaction is Fe2O3 + 2Al yields Al2O3 + 2Fe A welder

answered Dec 9, 2024

1 answer 101k views

According to dr. de salvo, what is public health 3.0?

asked Jul 4, 2024

1 answer 220k views

The investors of Smith Autos have put up $500,000 to construct a building and purchase all equipment required to wash cars. The investors expect to earn a minimum return of 10% on their investment. If

answered May 27, 2024

1 answer 16.3k views

What is the value of cos-1(1/2)

asked Apr 21, 2024

1 answer 98.9k views

I would like to test the null hypothesis that the population mean is 50 versus the alternative that it is not 50. My sample size is 6, and the sample mean is 38 with a sample standard deviation of 16.

asked Jan 18, 2024

1 answer 170k views

What is the solution to the equation (√(2x+5) = 5) ?

asked Jan 17, 2024

1 answer 198k views

Pls help ASAP I need a good grade on this

answered Nov 23, 2023

2 answers 44.5k views

Write the equation of the line that passes through the points (-5, -2) and(-7, -2). Put your answer in fully reduced point-slope form, unless it is a vertical orhorizontal line.

answered Oct 17, 2023

1 answer 29.7k views

Difference between sorting and filtering

answered Oct 5, 2023

2 answers 131k views

What is a good theme for chapter eight from we beat the street

asked Sep 27, 2023

1 answer 116k views

Please helpppp ASAP pleaseeees

asked Aug 24, 2023

1 answer 162k views

Which point in the coordinate plane? HELP!!

answered Aug 13, 2023

2 answers 170k views

find the total area of cardboard used in making a matchbox, complete with the sliding portion, 4cm long, 2.5cm wide, and 1.2cm deep (ignore the thickness of the cardboard)

asked Jul 18, 2023

1 answer 80.0k views

Where did Jefferson’s inauguration take place?

asked Jul 2, 2023

2 answers 116k views

4. One of the following regions did not experience a bloody encounter with the conquering army of Menelik II. a) Wallaga b) Kaffa (c) Arsi d) Wollayita

answered Apr 9, 2023

1 answer 70.7k views

Strontium-90, a radioactive isotope with applications in medicine, has a half-life of approximately 30 years. Out of a 100-gram sample, approximately how much remains after 170 years? 2 grams 8 grams 17

answered Nov 22, 2022

1 answer 47.1k views

A car travels 100 kilometers in 30 minutes. which statements about the motion of the car are true? Choose all the apply A) The car has an average speed of 25 km/h. B) the car’s speed cannot be known. C)

answered Nov 8, 2022

2 answers 30.6k views

HELP I DONT UNDERTAND THIS!

asked Nov 7, 2022

2 answers 202k views

What is the difference between a rectangular prism and a rectangular pyramid

asked Sep 25, 2022

2 answers 228k views

Which of the following is a solution to the equation: y = 7x + -59? Choose all that apply. Select all that apply: O (8,-3) O (9,8) O (7,-3) 0 (10,5)

asked Aug 7, 2022

1 answer 95.0k views

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