Physics, 10.10.2021 15:30 nehamaan503
Câu 19: Hai điện tích điểm có điện tích lần lượt là q1 = –4 (μC) và q2 = 1 (μC). Cho hai điện tích điểm tiếp xúc nhau. Sau đó tách hai điện tích điểm ra xa. Điện tích của hai điện tích điểm lúc sau là
A. q'1 = –3 (μC) và q'2 = –3 (μC). B. q'1 = –1,5 (μC) và q'2 = –1,5 (μC).
C. q'1 = 1 (μC) và q'2 = –4 (μC). D. q'1 = –4 (μC) và q'2 = 1 (μC)
Answers: 2
Physics, 21.06.2019 18:00
Abaseball has a mass of 0.145 kg and approaches a bat at 40.0 m/s. after it is hit, the ball leaves the bat at 50.0 m/s directly back. find the impulse of the bat on the ball. 7.25 kg*m/s 13.1 kg*m/s 5.80 kg*m/s 1.45 kg*m/s
Answers: 2
Physics, 21.06.2019 23:20
According to newton's second law, when the same force is applied to two objects of different masses, a the object with greater mass will experience a great acceleration, and the object with less mass will experience an even greater acceleration, b. the object with greater mass will experience a smaller acceleration, and the object with less mass will experience a greater acceleration, c. the object with greater mass will experience a greater acceleration, and the object with less mass will experience a smaller acceleration, d. the object with greater mass will experience a small acceleration, and the object with less mass will experience an even smaller acceleration.
Answers: 1
Physics, 22.06.2019 14:40
What is the orbital period of a spacecraft in a low orbit near the surface of mars? the radius of mars is 3.4×106m.
Answers: 2
Physics, 22.06.2019 18:30
Abaseball is thrown from the outfield toward the catcher. when the ball reaches its highest point, which statement is true? (a)its velocity is not zero, but its acceleration is zero. (b) its velocity and its acceleration are both zero. (c) its velocity is perpendicular to its acceleration. (d) its acceleration depends on the angle at which the ball was thrown. (e) none of the above statements are true.
Answers: 1
Câu 19: Hai điện tích điểm có điện tích lần lượt là q1 = –4 (μC) và q2 = 1 (μC). Cho hai điện tích đ...
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