How long do you think it takes for rocks to form?

A 5.0 g coin is placed 15 cm from the center of a turntable. The coin has static and kinetic coefficients of friction with the t

Alexandra [31]

Answer:

the coin does not slide off

Explanation:

mass (m) = 5 g = 0.005 kg

distance (r) = 15 cm = 0.15 m

static coefficient of friction (μs) = 0.8

kinetic coefficient of friction (μk) = 0.5

speed (f) = 60 rpm

acceleration due to gravity (g) = 9.8 m/s^{2}

lets first find the angular speed of the table

ω = 2πf

ω = 2 x π x 60 x $\frac{1}{60}$

ω = 6.3 s^{-1]

Now lets find the maximum static force between the coin and the table so we can get the maximum velocity the coin can handle without sliding

static force (Fs) = ma

static force (Fs) = μs x Fn = μs x m x g

Fs = 0.8 x 0.005 x 9.8 = 0.0392 N

Fs = ma

0.0392 = 0.005 x a

a = 7.84 m/s^{2}

$(Vmax)^{2}$ = a x r

$(Vmax)^{2}$ = 7.84 x 0.15

Vmax = 1.08 m/s

ωmax = $\frac{Vmax}{r}$

ωmax = $\frac{1.08}{0.15}$ = 7.2 s^{-1}

now that we have the maximum angular acceleration of the table, we can calculate its maximum speed in rpm

Fmax = $\frac{ωmax}{2π}$

Fmax = $\frac{7.2}{2 x π}$ = 68.7 rpm

since the table is rotating at a speed less than the maximum speed that the static friction can hold coin on the table with, the coin would not slide off.

4 0

4 years ago

Suppose you wish to whirl a pail full of water in a vertical circle at a constant speed without spilling any of its contents (ev

Yanka [14]

Answer:

V = 2.87 m/s

Explanation:

The minimum speed required would be that at which the acceleration due to gravity is negated by the centrifugal force on the water.

Thus, we simply need to set the centripetal acceleration equal to gravity and solve for the speed V using the following equation:

Centripetal acceleration = V^2 / r

where r is the distance of water from the pivot or shoulder.

For our case, r will be 0.65 + 0.19 = 0.84 m

and solving the above equation we get:

9.81 = V^2 / 0.84

V^2 = 8.2404

V = 2.87 m/s

6 0

3 years ago

Resolve the weight of the box to find the component of the weight acting parallel to the slope.

tekilochka [14]

Answer:

here's your answer below

Explanation:

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4 0

3 years ago

The maximum acceleration a pilot can stand without blacking out is about 7.0 g. In an endurance test for a jet plane's pilot, wh

steposvetlana [31]

Answer:

$v=54.00m/s$

Explanation:

7.0g is $7\times$ the acceleration due to gravity.

Given that $g=7\times9.8m/s^2$ , acceleration can be calculated as:

$a=7\times9.8m/s^2\\a=68.6m/s^2$

Since circular motion is involved and our radius of curvature is given as, $r=\frac{85}{2}m$ , <em>centripetal acceleration </em>is given by the formula: $a=v^2/r$ .

Make $v^2$ subject of the formula to find $v$ :

$a=v^2/r\\v^2=ar=68.6\times(85/2)\\v^2=2915.5\\v=\sqrt{2915.5}\\v=54.00m/s$

The maximum speed of the pilot is $54m/s$

7 0

4 years ago

Gina is burning different fuels label the diagram

Anna35 [415]

The answer for the missing labeling as (i) and (ii) will be (i)thermometer and (ii)condenser.

<h3>What is a burner?</h3>

A burner is a device intended to guarantee that the flame is stabilized.

By creating a proper flow field to cause the initial temperature rise, a The fuel/air combination is heated from within the flame to the ignition temperature.

When the flame or heat is created in fuel-burning or heat-generating equipment.

Wood, coal, kerosene, LPG, petrol, and diesel are a few of the often utilized fuels. In order to cook, heat, power vehicles, and create electricity, we utilize fuels.

The barrel, collar, air holes, gas intake, gas valve, and base are the different pieces of a Bunsen burner. Each component is essential to the process of creating a flame.

Hence, the answers for the missing labeling will be (i) thermometer and (ii) condenser.

To learn more about the burner refer;

brainly.com/question/1477483

#SPJ1

7 0

2 years ago