Physics, 28.09.2019 09:50 ronni386re
Which of the following is true about the mass of the reactants in a chemical reaction? a. the total mass of the reactants in a chemical reaction will be significantly more than the total mass of the products. b. the total mass of the reactants in a chemical reaction will never be equal to the total mass of the products. c. the total mass of the reactants in a chemical reaction will be significantly less than the total mass of the products. d. the total mass of the reactants in a chemical reaction is conserved and will be equal to the total original mass of the products.
Answers: 1
Physics, 21.06.2019 19:10
Athin, square metal plate measures 14 cm on each side and has emissivity of 0.60. the plate is heated to a temperature of 745°c. what is the rate at which the plate radiates energy ? the stefan-boltzmann constant is 5.67 × 10-8 w/(m2 ? k4). remember that the plate will radiate energy from both its top and bottom surfaces.
Answers: 1
Physics, 22.06.2019 13:30
The two stars in a certain binary star system move in circular orbits. the first star, alpha, has an orbital speed of 36 km/s. the second star, beta, has an orbital speed of 12 km/s. the orbital period is 137 d. a) what is the mass of the star alpha? b) what is the mass of the star beta?
Answers: 1
Physics, 22.06.2019 19:40
Which of the following is a characteristic shared by both electron and light microscopes? a. they both employ the use of objective lenses. b. both microscopes require an internal camera to visualize the specimen. c. both microscopes have a resolving power of 0.01 nm. d. they both utilize white light to magnify the specimen.
Answers: 2
Physics, 23.06.2019 08:00
Which of these are physical changes in matter? check all that apply. boiling water a pencil being sharpened exploding dynamite freezing water rotting cheese
Answers: 2
Which of the following is true about the mass of the reactants in a chemical reaction? a. the total...
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