Ba điện tích điểm Q1 = 6 , Q2 = –4 và Q3 = 8 đặt tại A, B, C theo thứ tự đó trên một đường thẳng trong không khí. Biết AB = 20cm, BC = 30cm. Tính thông lượng điện trường do hệ ba điện tích trên gửi qua mặt cầu tâm B bán kính 10cm.

25pts the diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

An engineer designs a roller coaster so that a car travels horizontally for 152 ft, then climbs 137 ft at an angle of 34.0° above the horizontal. it then moves 137 ft at an angle of 48.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

Jasmine is diving off a 3-meter springboard. her height in meters above the water when she is x meters horizontally from the end of the board is approximated by the equation h=-x^2+3x+3. what is the maximum height jasmine will reach on her dive?