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4 years ago

In most cases a structure can have only one service true or false

Physics

1 answer:

Arte-miy333 [17]4 years ago

4 0

False.

Cause You Can Repurpose Any Building

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Why is a steam burn more damaging than a burn from boiling water at the same temperature?

maksim [4K]

The phase change (from gas to liquid) that the steam undergoes right when it touches your skin releases a lot of energy right onto your skin so it burns a ton. The boiling water would just burn you until it reaches the same temperature as your skin.

4 0

3 years ago

Mercury has two satellites. True False (I NEED THE ANSWER ASAP!

anastassius [24]

Answer:

False

Explanation:

Mercury has 0 natural satellites.

8 0

4 years ago

A civil engineer wishes to redesign the curved roadway in the example What is the Maximum Speed of the Car? in such a way that a

vlabodo [156]

Answer:

24.3 degrees

Explanation:

A car traveling in circular motion at linear speed v = 12.8 m/s around a circle of radius r = 37 m is subjected to a centripetal acceleration:

$a_c = \frac{v^2}{r} = \frac{12.8^2}{37} = 4.43 m/s^2$

Let α be the banked angle, as α > 0, the outward centripetal acceleration vector is split into 2 components, 1 parallel and the other perpendicular to the road. The one that is parallel has a magnitude of 4.43cosα and is the one that would make the car slip.

Similarly, gravitational acceleration g is split into 2 component, one parallel and the other perpendicular to the road surface. The one that is parallel has a magnitude of gsinα and is the one that keeps the car from slipping outward.

So $gsin\alpha = 4.43cos\alpha$

$\frac{sin\alpha}{cos\alpha} = \frac{4.43}{g} = \frac{4.43}{9.81} = 0.451$

$tan\alpha = 0.451$

$\alpha = tan^{-1}0.451 = 0.424 rad = 0.424*180/\pi \approx 24.3^0$

3 0

4 years ago

A metal ball of specific heat capacity 400 joule per kgper celsius is allowed to fall from a height of 100 metre .If the ball on

ExtremeBDS [4]

First we'll calculate the energy it posesses

G.P.E = mgh = 0.2 * 10 * 100 = 200 J

Now we'll calculate the temperature rise

Q = m * c * (t2 - t1)
Q/(m * c) = t2-t1
t2 = Q/(m * c) + t1 = 200/(0.2 * 400) + 0 = <span>2.5 C</span>

7 0

3 years ago

16. Through which of the following mediums is the velocity of a sound wave the greatest?

Anna007 [38]

A.) Steel.

steel travels 5,060 meters per second,

lead travels 1,402 meters per second,

water travels 1,439 meters per second,

and air depends on temperature.

8 0

3 years ago