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7 days ago

A distância entre duas retas reversas é a medida de um segmento orientado que *?

1 answer:

8 0

Fatec – SP) Let A be a point on line r, which is contained within plane α. It holds true that: a) there is exactly one line that is perpendicular to line r at point A. b) there exists one unique line, not lying in plane α, that is parallel to line r. c) there are infinitely many distinct planes that are parallel to plane α and contain line r. d) there are infinitely many distinct planes that are perpendicular to plane α and contain line r. e) there are countless distinct lines contained within plane α that are parallel to line r.

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You are working in a lab where RC circuits are used to delay the initiation of a process. One particular experiment involves an

pantera1 [306]

Answer:

$t'_{1\2} = 6.6 sec$

Explanation:

The half-life for the specified RC circuit can be expressed as

$t_{1\2} =\tau ln2$

where [/tex]\tau = RC[/tex]

$t_{1\2} = RCln2$

Given $t_{1\2} = 3 sec$

The circuit has a resistance of 40 ohms, and by adding a new resistor of 48 ohms, the total resistance becomes 40 + 48 = 88 ohms.

Thus, the new half-life is

$t'_{1\2} =R'Cln2$

Now, divide equation 2 by 1

$\frac{t'_{1\2}}{t_{1\2}} = \frac{R'Cln2}{RCln2} = \frac{R'}{R}$

$t'_{1\2} = t'_{1\2}\frac{R'}{R}$

After substituting all values, we can calculate the revised half-life

$t'_{1\2} = 3 * \frac{88}{40} = 6.6 sec$

$t'_{1\2} = 6.6 sec$

7 0

1 month ago

What is the magnitude of the maximum stress that exists at the tip of an internal crack having a radius of curvature of 3 × 10-4

Kisachek [356]

The maximum stress at the tip of the internal crack is calculated as 2872.28 MPa. Explanation: Details provided include the curvature radius of 3 × 10^-4 mm, a crack length of 5.5 × 10^-2 mm, and an applied tensile stress of 150 MPa. The equation used determines maximum stress based on these inputs.

8 0

19 days ago

3/63 A 2‐kg sphere S is being moved in a vertical plane by a robotic arm. When the angle θ is 30°, the angular velocity of the a

Kisachek [356]

Answer:

Ps=19.62N

Explanation:

A thorough explanation of the answer can be found in the attached files.

5 0

1 month ago

In an air standard diesel cycle compression starts at 100kpa and 300k. the compression ratio is 16 to 1. The maximum cycle tempe

Daniel [329]

The value obtained is 0.60. From the given conditions, we take k = 1.4 for air and r = 16. We know that for calculations involving diesel engine efficiency, we arrive at 0.60.

7 0

19 days ago

___________ is NOT a common injury that an automotive tech may experience at work.

Viktor [391]

Answer: The most frequently occurring injuries were sprains/strains, accounting for 39% of the total; lacerations comprised 22%, and contusions represented 15%. Almost half (49%) of the injuries led to one or more days of lost or restricted work; 25% resulted in 7 or more days lost or restricted.

Explanation:

Sprains/strains were the predominant injuries happening, making up 39% of all cases, while lacerations followed at 22% and contusions at 15%. Of these injuries, 49% caused employees to miss or face restricted workdays, with 25% leading to a minimum of 7 days lost or restricted.

7 0

1 month ago