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ehidna [41]
3 years ago
7

An object stays at rest until what happens to it?

Physics
1 answer:
bixtya [17]3 years ago
4 0
D. an outside or unbalanced force acts upon the object.
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A 100 Newton force applied to a machine lifts a 400 N object. What is the actual mechanical advantage of
uranmaximum [27]

Answer:

m = 4

Explanation:

It is given that,

A 100 Newton force applied to a machine lifts a 400 N object.  

We need to find the mechanical advantage of  this machine.

The mechanical advantage of a machine is given by the ratio of output force to the input force.

Here, output force is 400 N and input force is 100 N

So, mechanical advantage becomes :

m=\dfrac{400}{100}\\\\m=4

So, the mechanical advantage of this machine is 4.

7 0
3 years ago
The electric field in the region between the plates of a parallel plate capacitor has a magnitude of 6.3 105 V/m. If the plate s
xz_007 [3.2K]

Answer:

3.528×10² V.

Explanation:

potential difference: This is the work done when one coulomb of charge moves from one point to another in an electric field. The S.I unit of potential difference is volt. The formula of potential difference is given as,

V = kq/r..................... Equation 1

And

E = kq/r² .................. Equation 2

Comparing equation 1 and equation 2,

V = E×r............................. Equation 3

Where V = potential difference, E = Electric field between the plate of the capacitor, r = distance between the plate.

Given: E = 6.3×10⁵ V/m, r = 0.56 mm = 0.00056 m.

Substitute into equation 3,

V = 6.3×10⁵×0.00056

V = 3.528×10² V.

Hence the potential difference of the plate = 3.528×10² V.

4 0
3 years ago
What is the energy transformation taking place from right before the toy car is released until the toy car reaches the bottom of
konstantin123 [22]

It goes from Kinetic when it is at rest to potential on its way to the bottom.  There is also friction but very few people care about that.

6 0
3 years ago
MARKING BRAINLIEST! The velocity of sound waves in air is 343 m/s, 1,007 m/s in helium and 267 m/s in carbon dioxide. Which one
FromTheMoon [43]

Answer:

In helium

Explanation:

Since the units are the same, the value should only be considered.

6 0
3 years ago
Read 2 more answers
New theories usually don’t start “from scratch.” For example, the modern model of the atom is the result of new information adde
Evgen [1.6K]

Answer:

d

Explanation:

7 0
3 years ago
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