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3 years ago

8

As a tractor pulls a plow across a field, it exerts a force on the plow in the forward direction. What is the "equal and opposit

e force" in this interaction, according to Newton's third law?

1 answer:

Karolina [17]3 years ago

7 0

Answer:

the force of the plow pulling backward on the tractor

Explanation:

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Use this excerpt from the text to answer the question. "Some people insist the United States is more properly called a republic

Bond [772]

Political power is utilized in a roundabout way by chose authorities, not straightforwardly by the natives themselves. Oftentimes, legislators and numerous standard Americans allude to the United States as a majority rules system. Others locate this disturbing in light of the fact that, not at all like in a vote based system where nationals vote specifically on laws, in the United States, chose agents do – and, thusly, the U.S. is a republic.

4 0

3 years ago

A 0.260 m radius, 525 turn coil is rotated one-fourth of a revolution in 4.17 ms, originally having its plane perpendicular to a

Sophie [7]

Answer:

B = 0.37T

Explanation:

In order to calculate the needed magnitude of the magnetic force you use the following formula, which calculate the induced emf of the solenoid when there is a change in the magnetic flux:

$emf=-N\frac{\Delta \Phi_B}{\Delta t}=-N\frac{\Delta (BAcos\theta)}{\Delta t}$ (1)

emf: induced voltage in the solenoid = 10,000V

N: turns of the solenoid = 525

ФB: magnetic flux

B: magnitude of the magnetic field = ?

A: cross-sectional area of the solenoid = π*r^2

r: radius of the cross-sectional area = 0.260m

Δt: interval time of the change of the magnetic flux = 4.17ms = 4.17*10^-3s

First, you have the magnetic field direction perpendicular to the plane of the solenoid, after, the angle between them is 90° (quarter of a revolution)

In the equation (1) the only parameter that changes on time is the angle, then, you can solve for B from the equation (1):

$emf=-NBA\frac{cos(90\°)-cos(0\°)}{\Delta t}=\frac{NBA}{\Delta t}\\\\B=\frac{(\Delta t)(emf)}{NA}=\frac{(\Delta t)(emf)}{N(\pi r^2)}\\\\$

Finally, you replace the values of the parameters to calculate B:

$B=\frac{(4.17*10^{-3}s)(10000V)}{(525)(\pi(0.260m)^2)}=0.37T$

The strength of the magnetic field is 0.37T

7 0

3 years ago

Increase 90 in the ratio 6 : 5

Jobisdone [24]

Answer:

<em>108</em>

Explanation:

<u>Proportions </u>

Two quantities are proportional when one of them can be obtained by multiplying or dividing the other by a constant value. For example, knowing the price of one pencil as p, we can know the cost of purchasing X pencils as C=p.X

We are required to increase 90 by the ratio 6:5. The new value will be proportional to the original because we'll compute the product of

$\displaystyle 90\ \frac{6}{5}=108$

So the new value is 108

3 0

3 years ago

As of 2016, Nevada has a current minimum wage of $8.25 an hour ($/hr). If someone was really picky about how much they owed, how

xz_007 [3.2K]

Once again, you'd need to know that there are 60 seconds in a minute, and 60 minutes in an hour :)

I'd say converting the minimum wage into cents rather than dollars would make this problem a lot easier. $8.25 = 825 ¢.

So if this person is earning 825 ¢ in an hour, we should divide 825 by 60 to find out how much they're making in a minute:

825 ÷ 60 = 13.75 ¢

Now, we just need to divide by 60 again to work out how much that is in seconds:

13.75 ÷ 60 = 0.229 ¢

So to answer your question, this person would make 0.229 ¢ a second (¢/s) on the job with minimum wage. Converting this value to dollars wouldn't be viable (as it'd just be $0.00, so it's best to leave the answer in cents!)

6 0

3 years ago

Read 2 more answers

A concentrated vertical laod of 6000 lbf is applied at the ground suface most nearly what is the increase in the vertical pressu

drek231 [11]

Answer:

the correct answer is option A

Explanation:

given,

Load = 6000 lbf

depth = 3.5 ft

distance from the load = 4 ft

vertical stress = $\dfrac{3Pz^3}{2\pi (r^2+z^2)^{\frac{5}{2}}}$

= $\dfrac{3\times 6000\times 3.5^3}{2\pi (4^2+3.5^2)^{\frac{5}{2}}}$

= 28.96 lbf/ft²

= 29 lbf/ft²

hence, the correct answer is option A

5 0

3 years ago