Which of the observations indicates that a chemical change has occurred?
A
A tray of water e...
Physics, 17.12.2020 22:40 shaheedbrown06
Which of the observations indicates that a chemical change has occurred?
A
A tray of water evaporates while sitting on a window sill.
B
A flashlight feels warm after it has been on for a long time.
C
A gas is generated when two liquids are mixed together.
D
Paint dries after it is applied to a wall.
Answers: 1
Physics, 22.06.2019 12:30, mikurrjurdan
Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.
Answers: 1
Physics, 22.06.2019 15:30, jjjjjj4999
Match each scenario to the form of energy it represents
Answers: 2
Physics, 22.06.2019 21:20, dee0828
16. a brave but inadequate rugby player is being pushed backward by an opposing player who is exerting a force of 800 n on him. the mass of the losing player plus equipment is 90.0 kg, and he is accelerating at 1.20m/s2 size 12{1 "." "20"" m/s" rsup { size 8{2} } } {} backward. (a) what is the force of friction between the losing player’s feet and the grass? (b) what force does the winning player exert on the ground to move forward if his mass plus equipment is 110 kg? (c) draw a sketch of the situation showing the system of interest used to solve each part. for this situation, draw a free-body diagram and write the net force equation.
Answers: 2
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