Physics, 24.11.2021 14:00 shaylarreyes
Mắc bóng đèn nối tiếp với một điện trở R=12 ôm vào hiệu điện thế 18V. Một ampe kế đo cường độ dòng điện mạch chính
-vẽ sơ đồ mạch điện
-tính điện trở tương đương của đoạn mạch
-tính số chỉ ampe kế
-đèn có sáng bình thường không ?vì sao
Answers: 1
Physics, 22.06.2019 11:30
Madison pushes with a 210-n horizontal force on a 24-kg crate of coffee resting on a warehouse floor. the force of friction on the crate is 74 n. what is the acceleration?
Answers: 1
Physics, 22.06.2019 16:00
What is the measure of how much matter is in an object and that can be measured using a balance? a. height b. volume c. weight d. mass
Answers: 1
Physics, 22.06.2019 16:30
An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. but she does have devices to measure distance and time accurately. she knows her own mass is 77.4 kg , but she is unsure of the mass of a large gas canister in the airless rocket. when this canister is approaching her at 3.50 m/s , she pushes against it, which slows it down to 1.30 m/s (but does not reverse it) and gives her a speed of 2.60 m/s . what is the mass of the canister?
Answers: 1
Physics, 22.06.2019 16:50
Aresistor with an unknown resistance is connected in parallel to a 9 ω resistor. when both resistors are connected in parallel to an emf source of 21 v, the current through the unknown resistor is measured with an ammeter to be 4 a. what is the resistance of the unknown resistor? answer in units of ω.
Answers: 3
Mắc bóng đèn nối tiếp với một điện trở R=12 ôm vào hiệu điện thế 18V. Một ampe kế đo cường độ dòng đ...
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