Physics, 22.07.2021 06:30 Thejollyhellhound20
Nhiệt lượng tỏa ra từ một vật có khối lượng 300g khi nó được làm lạnh trong 300g nước làm cho nhiệt độ của khối nước này tăng từ 30°C đếb 40°C. Biết nhiệt độ ban đầu của vật là 50°C. Nhiệt dung riêng của vật là bao nhiêu? (cal/g.°C)
Answers: 1
Physics, 21.06.2019 16:30, ericuh
Which statement best describes resistance? resistance is a. how well a current will flow in a material and is measured in volts. b. how well a material conducts an electrical charge and is measured in ohms. c. the ability of a material to attract a positive charge to create a current. d. the ability of a material to repel neutral charges and is measured in ohms.
Answers: 3
Physics, 22.06.2019 01:30, LarryJoeseph
Question 7 [2 marks] in the circuit below, the electromotive force generated by the battery is e = 6.0 v, and the resistances are r1 = r4 = 1.0 q, r2 = r3 =2.0 q. r. the power delivered by the battery to the circuit is closest to a. 6 w в. 12 w с. 15 w d. 18 w e. 20 w final exam autumn 2014 page 5 of 9 68037 physical modelling faculty of science [2 mark] question 8 with reference to question 7, the current through resistor r2 is closest to a. 1 a в. 2 а c. 3 a d. 4 a e. 6 a
Answers: 2
Physics, 22.06.2019 05:00, eshaesmot12345
Which car has the most kinetic energy? a. a car of mass 1000 kg with a speed of 3 m/s b. a car of mass 2000 kg with speed 7 m/s c. a car of mass 1000 kg with speed 7 m/s d. a car of mass 2000 kg with speed 3 m/s
Answers: 1
Nhiệt lượng tỏa ra từ một vật có khối lượng 300g khi nó được làm lạnh trong 300g nước làm cho nhiệt...
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