Chemistry, 04.02.2021 01:10 rcmhargoux9546
Please help!
1. How much work is done when a person lifts a box up 136 cm with a force of 28.2N, round to the tenths place?
2. A person does 5415J of work in 4.5 minutes, how much power, expressed in watts, rounded to the tenths place, was generated?
3. Calculate the potential energy of an object whose mass is 56.90kg when dropped from a height of 2150.cm. Round your answer to the nearest tens place.
4. Calculate the kinetic energy of an object with a mass of 355g moving at a velocity of 7.73 m/s. Round your answer to the nearest tenths place.
5. What is the total energy of a system with KE = 1368 J and a PE = 5782J? Express your answer in kJ.
Answers: 3
Chemistry, 22.06.2019 14:50
Which of the following is most likely true about water in chemical systems? a) water dissolves nonpolar ionic compounds. b) water dissociates ionic compounds. c) water dissociates covalent molecules. d) water dissolves nonpolar covalent substances.
Answers: 1
Chemistry, 23.06.2019 04:10
Two solids are mixed in a flask and stirred. after a few minutes, the flask becomes cold. which of the following best describes this reaction? a. an exothermic reaction b. a combustion reaction c. an endothermic reaction d. a decomposition reaction
Answers: 1
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1. How much work is done when a person lifts a box up 136 cm with a force of 28.2N, ro...
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