Phát biểu nào sau đây là đúng? A. Lực và phản lực có chung điểm đặt.
B. Cặp lực trực đối thì triệt tiêu nhau.
C. Cặp lực trực đối thì luôn ngược hướng.
D. Lực pháp tuyến và trọng lực là hai lực trực đối của nhau

Which changes would result in a decrease in the gravitational force btween two objects? check all that apply

The second largest public utility in the nation is the sole provider of electricity in 32 counties of southern florida. to meet the monthly demand for electricity in these counties, which is given by the inverse demand function p = 1,200 – 4q, the utility company has set up two electric generating facilities: q1 kilowatts are produced at facility 1, and q2 kilowatts are produced at facility 2 (so q = q1 + q2). the costs of producing electricity at each facility are given by c1(q1) = 8,000 + 6q12 and c2(q2) = 6,000 + 3q22, respectively. determine the profit-maximizing amounts of electricity to produce at the two facilities, the optimal price, and the utility company’s profit

Which of the following is a direct benefit of the use of assembly lines in production a. laws against theft fraud and coercion are needed to protect free choice. b. the government needs to plan efficient outcomes. c. competition among producers by itself cannot ensure a wide range of consumer choices. d. works pressure the government to guarantee minimum wages