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Answers by Knack

Answers by Knack
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A heater in a hot water tank gives off 20,000 KJ per hour. The initial temperature of 450 kg of water in the tank is 8.0 degrees * C the tank is heated for 90 minutes , determine the final temperature
answered Jun 14, 2021
2 votes
185k views
Q4. The student started with 16.0 grams of NaCl, show the calculation for the percent error that represents the amount of salt lost during the separation of the mixture.
answered Feb 24, 2021
2 votes
215k views
X(y + 2z) - z(x + y)
answered Jan 16, 2021
3 votes
7.5k views
What is the equation of a horizontal line passing through (4,-3)
answered Dec 11, 2020
5 votes
198k views
"Did you know that a white dwarf star is the weight of the sun, but has only the diameter of the earth. A cupful of white dwarf material weighs 22 tons!" Then he went on to develop his credibility and
answered Dec 9, 2020
3 votes
226k views
What is the simplified product
answered Dec 8, 2020
6 votes
135k views
Kevin is a graduate student in psychology and is fascinated by the topic of psychological disorders. He wants to study why they occur and how he, as a future therapist, can help restore healthy psychological
answered Nov 22, 2020
5 votes
80.5k views
Simplify the expression 12(8b-5)
answered Jun 24, 2020
2 votes
215k views
Ding three consecutive even integers such that the sum of twice the smallest and three times the largest is 42
answered Sep 17, 2019
6 votes
217k views
Why does Mark Antony describe Brutus as “the noblest Roman of them all” (5.5)?
answered Aug 20, 2019
3 votes
176k views
Colby and Jaquan are growing bacteria in an experiment in a laboratory. Colby starts with 50 bacteria in his culture and the number of bacteria doubles every 2 hours. Jaquan has a different type of bacteria
answered Jul 11, 2019
2 votes
134k views
Why did the Native Americans of New Mexico rebel against the Spanish?
answered May 13, 2019
2 votes
157k views
What is the main idea of "Bike Safety"? Bike hand signals should be used consistently and properly. Bikers need to be aware of bicyle laws in their hometowns. Biking is fun and safe if precautions are
answered May 9, 2019
5 votes
140k views
In order to give a souvenir table tennis ball to each participant in a youth table tennis tournament, a city recreation department needs to buy 48 white and 27 orange table tennis balls. Each box of table
answered Feb 14, 2019
3 votes
17.3k views
The principle of popular sovereignty in the Constitution is signified by the words?
answered May 11, 2018
7 votes
154k views
Congressman Smith opposes military action because he is weak and cowardly. Which logical fallacy does this example contain? A. Ad Hominem B. False Causality C. Straw Man D. Begging the question
answered Apr 29, 2018
2 votes
42.6k views
Methane gives which planets their blue-green color
answered Apr 1, 2018
6 votes
178k views
The water molecule H2O is polar because it contains two polar single bonds and A. its molecule has a linear shape. B. molecules that contain polar bonds are always polar. C. its molecule has a bent shape.
answered Mar 16, 2018
1 vote
210k views
HELP ASAP PLEASE!!!!!! Eva opened a bank account. She deposited $68.40 into her account every month for 20 months. She used $42.40 every month to pay for craft classes. After 20 months, she used 1 over
answered Feb 26, 2018
1 vote
229k views
Horses and tapirs have a common ancestor, but they now look very different from one another. Horses are now grassland animals adapted for grazing on grass and shrubs. Tapirs are jungle animals that live
answered Dec 22, 2017
3 votes
193k views
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