The mass of the box is 5kg (the mass center is located in the middle of the box), the mass of a lower arm plus a hand is 1.5 kg (the mass center is located in the middle of the segment), an upper arm weighs 2 kg (the mass center is located in the middle of this segment), and the total mass of the head and torso is 27 kg. Assuming g=10N/kg and 1 iinch=2.54 cm, how large is the force exerted by the back extensor muscles at the L5/S1 in Newtons? How large is the compression force at the L5/S1? How large is the shear force at the L5/S1?

Imagine us is a startup that offers high definition 3d prenatal ultrasounds for high-end customers. the service process includes four activities that are conducted in the sequence described below. (the time required for each activity is shown in parentheses): activity 1: welcome a patient and explain the procedure. (20 minutes)activity 2: prep the patient (e. g., show them to the room, apply ultrasound gel). (17 minutes) (*your id number represents the amount of time needed to complete this task)activity 3: take images. (5 minutes)activity 4: discuss diagnostic with patient. (20 minutes)at each location there are employees (servers) s1, s2, and s3. the assignment of tasks to servers is the following: s1 does activities 1 and 2.s2 does activity 3.s3 does activity 4.a. what is the capacity of this process (in customers per hour)? b. suppose 3 patients arrive every hour on average. ignoring any “start of day” or “end of day” effects, what are the utilizations of all three servers (%)? c. suppose each activity can be done by any server and any server can do any set of activities. however, each activity is done by only one server. for example, a possible assignment includes: s1 does activity 1, s2 does activity 2, and s3 does activities 3 and 4. of course, the original assignment of servers to activities is also feasible. what is the maximum capacity of the process (in customers per hour)? d. now consider the capacity measures in (c) and (a), what is the percentage change? why can you improve capacity without using additional resources? (there is no free lunch, right? )note: for all hw assignments, show your process of getting the results. only providing the final answers is not acceptable and will get 0%. if necessary, use a separate sheet of paper to show your work.

Which of the following describes a situation of scarcity? a. someone offers free advice about getting into college. b. someone distributes free bottles of water at the beach. c. a child charges friends for a ride on his new bike. d. a person lets the kids in the neighborhood use his pool.

Marque a alternativa que apresenta somente as opções de financiamento com recursos internos: a) lucros, venda de ativos e recursos próprios. b) lucros, venda de ativos e redução no capital de giro. c) lucros, venda de ativos e recursos de familiares. d) lucros, venda de ativos e prorrogação nos prazos para receber os pagamentos dos clientes. e) lucros, venda de ativos e aumento do estoque de mercadorias.