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3 years ago

Which statement correctly describes the relationship between thermal energy and particle movement?

1 answer:

5 0

As thermal energy increases, there is more particle movement. As thermal energy increases, there is more particle movement. As thermal energy increases, there is less particle movement.

Sure hope this helps you

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a coin press creates a pressure of 3.20*10^8 Pa on a nickel of radius 0.0106 m. how much force does the press exert on the coin?

Naya [18.7K]

Answer:

1.13 x 10⁵N

Explanation:

Given parameters:

Pressure of the coin press = 3.2 x 10⁸ Pa

radius of the nickel coin = 0.0106m

Unknown:

Force of the press on coil = ?

Solution:

Our knowledge of pressure will help us solve this problem.

Pressure is defined as the force applied per unit area on a body.

Pressure = $\frac{force}{area}$

Force = Pressure x Area

Since the pressure is known;

Area of the coin = Area of a circle = π r²

where r is the radius of the coin;

Area of the coin = π x 0.0106² = 3.53 x 10⁻⁴m²

Force = 3.2 x 10⁸ x 3.53 x 10⁻⁴ = 1.13 x 10⁵N

3 0

3 years ago

A small 12.00 g plastic ball is suspended by a string in a uniform, horizontal electric field. If the ball is in equilibrium whe

notsponge [240]

Answer:

$Q = \frac{0.068}{E}$

where E = electric field intensity

Explanation:

As we know that plastic ball is suspended by a string which makes 30 degree angle with the vertical

So here force due to electrostatic force on the charged ball is in horizontal direction along the direction of electric field

while weight of the ball is vertically downwards

so here we have

$QE = F_x$

$mg = F_y$

since string makes 30 degree angle with the vertical so we will have

$tan\theta = \frac{F_x}{F_y}$

$tan30 = \frac{QE}{mg}$

$Q = \frac{mg}{E}tan30$

$Q = \frac{0.012\times 9.81}{E} tan30$

$Q = \frac{0.068}{E}$

where E = electric field intensity

5 0

3 years ago

A car whose initial speed is 30 m/s slows uniformly to 10 m/s in 5 seconds. Determine the acceleration of the car. Sketch a gra

Anton [14]

Initial velocity=u=30m/s
Final velocity=v=10m/s
Time=5s

$\\ \sf\longmapsto Acceleration=\dfrac{v-u}{t}$

$\\ \sf\longmapsto Acceleration=\dfrac{10-30}{5}$

$\\ \sf\longmapsto Acceleration=\dfrac{-20}{5}$

$\\ \sf\longmapsto Acceleration=-4m/s^2$

Now

For the second question

Time=3s

Using 2nd equation of motion

$\\ \sf\longmapsto s=ut+\dfrac{1}{2}at^2$

$\\ \sf\longmapsto s=30(3)+\dfrac{1}{2}(-4)(3)^2$

$\\ \sf\longmapsto s=90-2(9)$

$\\ \sf\longmapsto s=90-18$

$\\ \sf\longmapsto s=72m$

5 0

3 years ago

What is the distance of earths surface from the surface of sun

storchak [24]

Max: 152 million km
min 146 million km

4 0

3 years ago

Read 2 more answers

URGENT!!

Stolb23 [73]

Next to south america plate and cocos plate

Hope this helps :)

6 0

4 years ago

Read 2 more answers