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Luden [163]
3 years ago
11

A waitperson carrying a tray with a platter on it tips the tray at an angle of 12 degrees below the horizontal. If the gravitati

onal force on the platter is 5.0 N, what is the magnitude of the force parallel to the tray that tends to cause the platter to slide down the tray? (Disregard friction.)

Physics
1 answer:
kirill115 [55]3 years ago
5 0

Answer:1.039 N

Explanation:

Given

inclination of tray=12^{\circ}

gravitational Force=5 N

Now this gravitational force has two component i.e.

5\sin \theta is parallel to the tray =1.039 N

5\cos \theta is perpendicular to the tray =4.890 N

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A wind turbine is a machine that spins when the wind blows. The turbine blades are attached to a
Hunter-Best [27]

Answer: B, increase the rate at which he turns the crank

Explanation: i got it right

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1 year ago
Someone please help. Describe how electric potential energy, kinetic energy, and work change when two charges of opposite sign a
erik [133]

Answer:

The answer is based on the conservation of energy law; something you should really understand by now.  

For convenience we can hold one of the two charges still; it becomes the frame of reference. And everything we say is in reference to the designated static charge, call it Q.  

So the moving charge, call it q, has total energy TE = PE. It's all potential energy as we start with q not moving.  

It has potential energy because in order to separate q from Q, we had to do work, add energy, on q. And from the COE law, that work added is converted into PE.  

It's a bit like lifting something off the ground. That's work and it becomes GPE. So there's some work, in separating the two charges in the first place.  

But there's more.  

Now we let q go. As opposites attract, q is pulled to Q. And that force from Q is working on q, force over distance. Which means the potential energy q started with is being converted into kinetic energy. q is accelerating and picking up speed.  

And there's more work, done by the EMF on charge q. That converts the PE into KE and the q charge smashes into Q with some kinetic energy.

5 0
3 years ago
an airplanes propeller completes one revolution in 65ms. a)what is the angular speed in rpm? in rad/s?
miss Akunina [59]

-- We already know the rate of revolutions per time ...
it's 1 revolution per 0.065 sec.  We just have to
unit-convert that to 'per minute'.

(1 rev / 0.065 sec) x (60 sec / min) = (1 x 60) / (0.065) = <em>923 RPM</em>  (rounded)
_______________________________

-- 1 revolution = 2π radians

  (2π rad) / (0.065 sec) = (2π / 0.065) = <em>96.66 rad/sec</em>  (rounded)


7 0
3 years ago
During one cycle, a refrigerator removes 500 J from a cold reservoir and discharges 800 J to its hot reservoir. (a) What is its
Paraphin [41]

Answer:

a)COP = 1.67

b) W = 300 J

Explanation:

given,

refrigerator removes = 500 J from a cold reservoir

discharge = 800 J to its hot reservoir

a) COP = \dfrac{Q}{w}      

   COP = \dfrac{500}{800-500}

   COP = 1.67                        

b) heat per cycle exhausted to the

     W + 500 = 800                        

     W = 800- 500                        

      W = 300 J                                  

5 0
3 years ago
A box of mass m is suspended by two ropes from a ceiling. if the ropes make the same angle with the vertical, what is the tensio
lilavasa [31]

The tension, T, in each rope is T= mg/2Sinθ

<h3>What is tension force?</h3>

Tension refers to the pulling force in a string which acts in an opposite direction to the force pulling on it.

The tension in each of the ropes are equal since they both make the same angle with the vertical.

Assume the angle the ropes make with the vertical are both θ.

Let the tension in each be T₁ and T₂

Also, T₁ = T₂ = T

T₁Sinθ + T₂Sinθ = mg

2TSinθ = mg

T = mg/2Sinθ

Therefore, the tension, T, in each rope is T = mg/2Sinθ

Learn more about tension at: brainly.com/question/14336853

#SPJ4

7 0
1 year ago
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