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 12:10
Ablock having mass m slides down an inclined plane. the force of friction between the block and the inclined plane is f, the block's weight is m g, and the normal force is n. (a) draw a free – body force diagram showing the forces acting on the block. (b) write down all relevant newton’s equations for a given situation.
Answers: 1
Physics, 22.06.2019 17:30
Aball thrown by ginger is moving upward through the air. diagram a shows a box with a downward arrow. diagram b shows a box with an upward arrow. diagram c shows a box with a downward and upward arrow equal in size. diagram d shows a box with a downward and upward arrow with the downward arrow larger in size. which force diagram represents the forces on the ball? you may neglect the effects of air resistance.
Answers: 3
Physics, 22.06.2019 23:50
An alpha particle with kinetic energy 12.5 mev makes a collision with lead nucleus, but it is not "aimed" at the center of the lead nucleus, and has an initial nonzero angular momentum (with respect to the stationary lead nucleus) of magnitude l = p0 b, where p0 is the magnitude of the initial momentum of the alpha particle and b=1.40×10−12 m. (assume that the lead nucleus remains stationary and that it may be treated as a point charge. the atomic number of lead is 82. the alpha particle is a helium nucleus, with atomic number 2.) what is the distance of closest approach?
Answers: 2
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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