PLEASE HELP/// <br> how many Croatian Music Awards has 2cello won

In a "Rotor-ride" at a carnival, people rotate in a vertical cylindrically walled "room." If the room radius is 5.5 m, and the r

Crank

Answer:

0.181

Explanation:

We can convert the 0.5 rps into standard angular velocity unit rad/s knowing that each revolution is 2π:

ω = 0.5 rps = 0.5*2π = 3.14 rad/s

From here we can calculate the centripetal acceleration

$a_c = \omega^2r = 3.14^2*5.5 = 54.3 m/s^2$

Using Newton 2nd law we can calculate the centripetal force that pressing on the rider, as well as the reactive normal force:

$F = N = a_cm = 54.3 m$

Also the friction force and friction acceleration

$F_f = N\mu = 54.3 m \mu N$

$a_f = F_f / m = 54.3 \mu$

For the rider to not slide down, friction acceleration must win over gravitational acceleration g = 9.81 m/s2:

$g = a_f = 54.3 \mu$

$9.81 = 54.3 \mu$

$\mu = 9.81 / 54.3 = 0.181$

6 0

2 years ago

What did Bohi's model of the dom inchide that Ruthextends model did not have

Aleksandr-060686 [28]

Answer:

Electrons revolves around the nucleus in a fixed orbits with fixed energy.

electron clouds.

Explanation:

Rutherford in his model of atom explained:

Maximum space inside the atom is empty.

Electron revolves around the the center called nucleus.

Nucleus contains the positive charge.

Bohr's in his model explained that:

Electrons revolves around the nucleus in a fixed orbit named as shells.

Each orbits or shells has fixed amount of energy and size.

6 0

2 years ago

A tungsten wire has resistance R at 20°C. A second tungsten wire at 20°C has twice the length and half the cross-sectional area

Colt1911 [192]

Answer:

Resistance will become 4 times of first wire resistance.

Explanation:

At the temperature of both the the tungsten wire is same so we can apply ohm's law

Let the length of first wire is $l_1$ and cross sectional area is $A_1$

Resistance of first wire $R=\frac{\rho l_1}{A_1}$ ......1

Now length of second wire is twice the length of first wire

$l_2=2l_1$ and cross sectional area $A_2=\frac{A_1}{2}$ .......2

Resistance of wire 2 $R_2=\frac{\rho l_2}{A_2}$ ........2

Dividing equation 1 by equation 1

$\frac{R}{R_2}=\frac{\rho l_1}{A_1}\times \frac{0.5A_1}{\rho 2l_1}$

$R_2=4R$

Therefore resistance will become 4 times.

8 0

3 years ago

What kind of energy is represented by KE?

Amanda [17]

Answer:

Explanation:

Depends on what you are measuring.

For example, in Chemistry, KE is measuring temperature. Temperature is the average of all the molecules present and their motion (using a gas as our base).

In physics, KE at beginning levels, is the speed of a moving object.

4 0

3 years ago

Chegg what are the requirements for the shear connectors to be characterised as ductile? why is there a requirement for a minimu

attashe74 [19]

The shear connectors must transfer axial shear stress completely. The minimum slip value is needed to limit the maximum slip at the ultimate limit state.

<h3>What is shear connection?</h3>

A shear connection is a type of join which allows the transfer of shear forces between two members of beams or truss.

The shear connectors are used in composite beam is to transfer the longitudinal shear stresses at the interface between the steel beam and the concrete slab.

The slip requirements are less than in a propped beam. The higher strains resulting in the bare steel section carrying the construction

Thus, minimum slip value is needed to limit the maximum slip at the ultimate limit state.

Learn more about shear connection.

brainly.com/question/20261986

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5 0

1 year ago

PLEASE HELP/// how many Croatian Music Awards has 2cello won