Recent activity by Thomas Kirchhoff

Recent activity by Thomas Kirchhoff

The diffusion coefficients for species A in metal B are given at two temperatures: At 1030°C, D = 6.69 × 10⁻¹⁷ m²/s. At 1290°C, D = 6.56 × 10⁻¹⁶ m²/s. (a) Determine the value of the activation energy,

asked Dec 18, 2024

1 answer 31.7k views

What percent is equivalent to two-thirds? a) 66 and one-third percent b) 66 and three-fifths percent c) 66 and two-thirds percent d) 66 and 7/10 percent

answered Dec 13, 2024

1 answer 141k views

true and false:An individual can determine their level of cardiovascular fitness and determine the level of perfomance necessary to make improvements.

asked Dec 4, 2024

1 answer 167k views

Look at the following Python code: word1 = ball word2 = park .Which of the following shows the concatenation of the two strings? a) word3 (ballpark) b) word3 (ball + park) c) word3 (word1 + word2) d) word3

answered Dec 1, 2024

1 answer 37.5k views

I NEED HELP WITH GEOMETRY WORK!!! Please explain answer

answered Oct 19, 2024

1 answer 3.2k views

Analyze key events and character reactions in "The Devil and Tom Walker."

answered Oct 12, 2024

1 answer 99.5k views

Which of the following is NOT a sign or symptom of acute renal failure?

answered Sep 29, 2024

1 answer 1.2k views

Keeping open space around your vehicle on the expressway is important. When is it difficult to do this on expressways? 1) During heavy traffic 2) During bad weather conditions 3) During construction zones

asked Sep 19, 2024

1 answer 103k views

Why do trainers use target training for zoo animals?

answered Sep 8, 2024

1 answer 27.3k views

Catalog item can appear only in one category. A. True B. False

answered Jul 12, 2024

1 answer 2.1k views

How many pi bonds are there in a molecule of fumaric acid? a. 1 b. 2 c. 3 d. 4

answered May 14, 2024

1 answer 7.2k views

Which information is needed to determine the speed of an object? OA. the weight of the object and the distance it travels OB. the pull of gravity on the object and the amount of time it travels OC. the

answered Apr 28, 2024

1 answer 98.4k views

Zendaya has $540 to spend at a bicycle store for some new gear and biking outfits. Assume all prices listed include tax. She buys a new bicycle for $269.88. She buys 4 bicycle reflectors for $10.57 each

answered Apr 1, 2024

1 answer 81.5k views

"23) At any given time, the yield curve is affected by I. lender preferences. II. inflationary expectations. III. liquidity preferences. IV. short- and long-term supply and demand conditions. A) I and

answered Mar 21, 2024

1 answer 189k views

PLEASE HELPPPP!!!!! What's the answer?

asked Mar 4, 2024

2 answers 95.5k views

Visceral pain is poorly localized and can be perceived to originate from a region of the body that is different from it's actual location; this is called A. analgesia. B. adaptation. C. referred pain.

asked Jan 24, 2024

1 answer 76.3k views

Can you tell which 3-D shape this would make?A. rectangular pyramidB. triangular prismC. doesn't fold to make a 3-D shapeD. rectangular prism

asked Oct 19, 2023

1 answer 17.0k views

QuFind the term a23 for the arithmetic sequence with first term, ay = 5, and common difference, d = 7.a 23 =

asked Oct 4, 2023

1 answer 82.1k views

A car travels at a speed of 35 miles per hour. How far does the car travel in 2.6 hours (round your answer to the nearest mile)?

answered Aug 23, 2023

1 answer 207k views

Can anyone help me solve this problem?

asked Jul 1, 2023

2 answers 154k views

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