8. O gráfico abaixo é a curva de aquecimento de 10g de uma substância. Analise as
seguintes afirmações:
40(°C)
120+
80-
100
300
0
--20
500
800 900
Q(cal)
-50
I.
II.
A substância em questão é a água.
O ponto de ebulição desta substância é
80° C
o calor latente de fusão desta
substância é 20cal/g.
III.
Das afirmações acima,
(A) Todas estão corretas.
(B) Todas estão erradas.
(C) Somente le ll estão corretas.
(D) Somente ll e lll estão corretas.
(E) Somente I está correta.

Athin plate moves between two parallel, horizontal, stationary flat surfaces at a constant velocity of v = 7.5 m/s. the two stationary surfaces are spaced 4 cm apart, and the medium between them is filled with oil whose viscosity is 0.9 n·s/m2. the part of the plate immersed in oil at any given time is 2 m long and 0.5 m wide. if the plate moves through the mid-plane between the surfaces, determine the force required to maintain this motion. what would your response be if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top surface (h1)? if the plate moves through the mid-plane between the surfaces, the force required to maintain the motion will be n. if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top (h1) surface, the force required to maintain the motion would be n.

Abike rider starts from rest and accelerates 28.0 meters down a slope in 5.00 seconds. what is her acceleration? select one: a. 3.21 m/sec2 b. 1.75 m/sec2 c. 9.80 m/sec2 d. 2.24 m/sec2

Each neuron shown in this figure innervates a group of muscle fibers. what is the term for a group of muscle fibers innervated by a single neuron?