Physics, 08.05.2021 23:20 jaylaa04

AUTOEVALUACIÓN Escribe lo que falta en los espacios en blanco:
Una es un conjunto de elementos móviles y fijos cuyo funcionamiento posibilita
aprovechar, dirigir, regular o transformar o realizar un con un fin
determinado.
Las son ingenios que utilizan los seres humanos para realizar trabajos
con un menor esfuerzo. Desde la antigüedad se considera que son cinco las grandes máquinas simples:
el plano , el , la rueda, la y la polea.
Los son elementos destinados a y/o fuerzas
y/o desde un elemento motriz ( ) a un elemento conducido
( ), con la misión de permitir al ser humano realizar determinados trabajos con mayor
comodidad y menor .
Un sistema mecánico sería una combinación de mecanismos que transforma velocidades, trayectorias,
fuerzas o energías mediante una serie de pasos intermedios

Answers: 2

Show answers

Another question on Physics

Physics, 22.06.2019 02:30

Agas contained within a piston-cylinder assembly undergoes three processes in series: process 12: compression with pv= constant from 1 bar and 1 liter to 4 bar. process 23: constant pressure expansion to 1 liter. process 31: constant volume calculate the pressure and volume at each state, and sketch the processes on a p-vdiagram labeled with pressure and volume values at each numbered stat

Answers: 2

Answer

Physics, 22.06.2019 10:50

Asheet of steel 1.5 mm thick has nitrogen atmospheres on both sides at 1200oc and is permitted to achieve a steady-state diffusion condition. the diffusion coefficient for nitrogen in steel at this temperature is 6 x 10- 11 m2 /s, and the diffusion flux is found to be 1.2 x 10-7 kg/m2 -s. also, it is known that the concentration of nitrogen in the steel at the high-pressure surface is 4 kg/m3 . how far into the sheet from this high-pressure side will the concentration be 2.0 kg/m3 ? assume a linear concentration profile.

Answers: 3

Answer

Physics, 22.06.2019 11:20

If a rock is thrown upward on the planet mars with a velocity of 12 m/s, its height (in meters) after t seconds is given by h = 12t − 1.86t2. (a) find the velocity of the rock after two seconds. m/s (b) find the velocity of the rock when t = a. 12−3.72a m/s (c) when will the rock hit the surface? (round your answer to one decimal place.) t = s (d) with what velocity will the rock hit the surface? m/s

Answers: 1

Answer

Physics, 22.06.2019 18:00

Cells in the nervous system have a potential difference of 70 mv across the cell membrane separating the interior of the cell from the extracellular fluid. this potential difference is maintained by ion pumps that move charged ions across the membrane. is this an emf? select the correct answer and explanation. 1)no. the ion pumps cannot separate charges; thus, they cannot create a potential difference. 2)yes. the ion pumps cannot separate charges, but they still can create a potential difference. 3)yes. the ion pumps can actively separate charge; thus, they can create a potential difference. 4)no. the ion pumps can separate charges, but they cannot create a potential difference.

Answers: 1

Answer

You know the right answer?

AUTOEVALUACIÓN Escribe lo que falta en los espacios en blanco:
Una es un conjunto de element...

Questions