Impact strips may be designed into a bumper cover.<br> True<br> False

A product (that has not been yet invented) that involves lighting up when something happens?

Zigmanuir [339]

Answer:

Maybe when there is a fire there can be fire drones that can take it out. and it can also resuce people who are stuck there.

Explanation:

5 0

3 years ago

A piston-cylinder device contains 1.329 kg of nitrogen gas at 120 kPa and 27 degree C. The gas is now compressed slowly in a pol

Shtirlitz [24]

Answer:-0.4199 J/k

Explanation:

Given data

mass of nitrogen(m)=1.329 Kg

Initial pressure $\left ( P_1\right )$ =120KPa

Initial temperature $\left ( T_1\right )=27\degree \approx$ 300k

Final volume is half of initial

R=particular gas constant

Therefore initial volume of gas is given by

PV=mRT

V=0.986\times 10^{-3}

Using $PV^{1.49}$ =constant

$P_{1}V^{1.49}$ = $P_2\left (\frac{V}{2}\right )$

$P_2$ =337.066KPa

$V_2$ = $0.493\times 10^{-3} m^{3}$

and entropy is given by

$\Delta s$ = $C_v \ln \left (\frac{P_2}{P_1}\right )$ + $C_p \ln \left (\frac{V_2}{V_1}\right )$

Where, $C_v$ = $\frac{R}{\gamma-1}$ =0.6059

$C_p$ = $\frac{\gamma R}{\gamma -1}$ =0.9027

Substituting values we get

$\Delta s$ = $0.6059\times\ln \left (\frac{337.066}{120}\right )$ + $0.9027 \ln \left (\frac{1}{2}\right )$

$\Delta s$ =-0.4199 J/k

4 0

3 years ago

If welding is being done in the vertical position, the torch should have a travel angle of?

siniylev [52]

Answer:

Between 35°– 45°

Explanation:

In the vertical position, Point the flame in the direction of travel. Keep the flame tip at the correct height above the base metal. An angle of 35°–45° should be maintained between the torch tip and the base metal. This angle may be varied up or down to heat or cool the weld pool if it is too narrow or too wide

4 0

2 years ago

Which of the following is true about silicosis?

user100 [1]

Answer:

D. The damage it causes is irreversible

Explanation:

Silicosis is a long term lung disease caused by crystalline silica dust inhalation. There is no cure, and once the damage is done it cannot be reversed.

------------------

Like stated above, the damage is irreversible. Option A is incorrect.

Construction workers are constantly moving to build whatever they're working on. The disease will make it hard to breathe and will have a heavy effect on their lungs, preventing them from properly doing their jobs. Additionally, it's possible to get the disease from this job since you're constantly inhaling dust particles.

Silicosis does major damage to the lungs. The dust particles are attacked by the immune system which causes inflammation and eventually leads to areas of hardened and scarred lung tissue.

Thus, the best option is D.

hope this helps :)

5 0

2 years ago

If you were to plot the voltage versus the current for a given circuit, what would you expect the slope of the line to be? If no

Brut [27]

Answer:

Part 1: It would be a straight line, current will be directly proportional to the voltage.

Part 2: The current would taper off and will have negligible increase after the voltage reaches a certain value. Graph attached.

Explanation:

For the first part, voltage and current have a linear relationship as dictated by the Ohm's law.

V=I*R

where V is the voltage, I is the current, and R is the resistance. As the Voltage increase, current is bound to increase too, given that the resistance remains constant.

In the second part, resistance is not constant. As an element heats up, it consumes more current because the free sea of electrons inside are moving more rapidly, disrupting the flow of charge. So, as the voltage increase, the current does increase, but so does the resistance. Leaving less room for the current to increase. This rise in temperature is shown in the graph attached, as current tapers.

7 0

4 years ago

Impact strips may be designed into a bumper cover. True False