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3 years ago

What is the unit of work? * A. Joule B. Newton/meter C. Watt D. All of the above

Physics

2 answers:

djyliett [7]3 years ago

3 0

Answer:

A! I already went through this unit. Joule.

Explanation:

Ksju [112]3 years ago

3 0

Answer:

A is the answer thank me later

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3 kg of wet clothes are hung on the middle of a clothesline with posts 6 ft apart. The clothesline sags down by 3 feet. What is

miskamm [114]

Answer:

Tension in string equals 14.715 Newtons

Explanation:

The situation is represented in the figure attached below:

For equilibrium of the clothes along y- axis we have

$\sum F_{v}=0\\\\\Rightarrow 2Tcos(\theta )=W\\\\\therefore T=\frac{W}{2cos(\theta )}$

Applying values we get

$\sum F_{v}=0\\\\\Rightarrow 2Tcos(\theta )=W\\\\\therefore T=\frac{3\times 9.81}{2\times 1}=14.715N(\because cos(\theta )=\frac{3}{3}=1)$

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Which statement most accurately compares earth crust and earth mantle

Aliun [14]

Answer:

Earth crust is thinner and less dense than the mantle.

Earth crust is thinner and less dense than the mantle.

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3 years ago

when a 0.622kg basketbll hits the floor its velocit changes from 4.23m/s down to 3.85m/s up. if the averge force was 72.9N how m

scoray [572]

Answer:

Time, t = 3.2 ms

Explanation:

It is given that,

Mass of basketball, m = 0.622 kg

Initial velocity, u = 4.23 m/s

Final velocity, v = 3.85 m/s

Average force acting on the ball, F = 72.9 N

We need to find the time of contact of the ball with the floor. Let t is the time of contact. So,

$F=ma\\\\F=\dfrac{m(v-u)}{t}\\\\t=\dfrac{m(v-u)}{F}\\\\t=\dfrac{0.622\times (3.85-4.23)}{72.9}\\\\t=0.0032\ s\\\\\text{or}\\\\t=3.2\ ms$

So, the ball is in contact with the floor for 3.2 ms.

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4 years ago

What was the "Plum Pudding" model of the atom and it's electrons?

MrMuchimi

The 'plum pudding' model of the atom was proposed by JJ Thomson, who had also discovered the electron. It was put forth before the discovery of the nucleus. According to this model, the atom is a sphere of positive charge, and negatively charged electrons are embedded in it to balance the total positive charge.

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Which of the following was NOT a department in Washington's first cabinet?

Bingel [31]

Answer:

I believe its C: Secretary of War. I hope this helped :)

Explanation:

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