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Evgesh-ka [11]
2 years ago
12

A. Describe something that you do on a regular basis where friction slows you down (Use a different example than the ones in the

lesson).
b. Describe two examples (different from the ones in the lesson) in which you have noticed friction creating thermal energy.

100 points!


c. Describe two examples of activities that you do where you depend on friction, and would not be able to do them without friction. Please use different examples than the lesson.
Physics
2 answers:
Kitty [74]2 years ago
8 0
The answer is indeed B according to my calculations
Scrat [10]2 years ago
3 0

Answer:

i get good unlike you

Explanation:

its pretty simple to be honest

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What is the rate of heat transfer by radiation, with an unclothed person standing in a dark room whose ambient temperature is 22
SIZIF [17.4K]

Answer:

5.45\times 10^{-4} W

Explanation:

T_{r} = Temperature of the room = 22.0 °C = 22 + 273 = 295 K

T_{s} = Temperature of the skin = 33.0 °C = 33 + 273 = 306 K

A = Surface area = 1.50 m²

\epsilon = emissivity = 0.97

\sigma = Stefan's constant = 5.67 x 10⁻⁸ Wm⁻² K⁻⁴

Rate of heat transfer is given as

R = \epsilon \sigma A (T_{s}^{2} - T_{r}^{2})

R = (0.97)(5.67\times 10^{-8}) (1.50) ((306)^{2} - (295)^{2})

R = 5.45\times 10^{-4} W

3 0
3 years ago
In addition to stand-alone discussion boards, all of these sites include discussion boards as part of their features except: ​
adell [148]

Answer:

A. Linkedln

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In addition to stand-alone discussion boards, all of these sites include discussion boards as part of their features except: ​

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3 years ago
How to calculate wavelength in m when you know the frequency?
NNADVOKAT [17]
It's c/f, in which c is the speed of light (300000 m/s)
6 0
3 years ago
A cat chases a mouse across a 1.2 m high table. The mouse steps out of the way, and the cat slides off the table and strikes the
Drupady [299]
The cat has two directions of motions:
The horizontal motion = Dx = 2.2 m
The vertical motion = Dy = -1.3 m (negative sign indicates that the cat is falling)
a = 9.8 m/sec^2
Vy = zero (since you are not moving up)

From the laws of motion:
<span>Dy = Vyt + 0.5ayt^2 
</span>-1.3 = 0(t) + 0.5(-9.8)t^2
<span>t = 0.52s
</span>
Then, again using the laws of motion (but for the horizontal direction this time)
Dx = Vxt 
<span>2.2 = Vx0.52 </span>
<span>Vx = 2.2/0.52 </span>
<span>= 4.23 m/s 
</span>
<span>Therefore the cat's speed when it slid off the table is 4.23 m/s horizontally.</span>



7 0
3 years ago
3. When the procedure is repeated with a third line how will it distinguish whether the location of the center of gravity is acc
Law Incorporation [45]
Well this is question is easy. I mean i’m the one to say the least, The answer is.. SIKE L bozo imagine not knowing the answer
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3 years ago
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