HURRY What happened when the speed was increased?

Mechanical advantage what does this mean for a simple machine

lyudmila [28]

Mechanical advantage is a measure of the force amplification achieved by using a tool, mechanical device or machine system. Ideally, the device preserves the input power and simply trades off forces against movement to obtain a desired amplification in the output force. The model for this is the <span>law of the lever.</span> Machine components designed to manage forces and movement in this way are called mechanisms. An ideal mechanism transmits power without adding to or subtracting from it. This means the ideal mechanism does not include a power source, and is frictionless and constructed from rigid bodies that do not deflect or wear. The performance of a real system relative to this ideal is expressed in terms of efficiency factors that take into account friction, deformation and wear.

7 0

3 years ago

Light from a laser (lambda= 406.192 nm) is used to illuminate two narrow slits. The interference pattern is observed on a screen

dsp73

Answer:

The spacing between the slits is $d = 0.00145m$

Explanation:

From the question we are told that

The wavelength of the light is $\lambda = 406.192nm = 406.192*10^{-9} m$

The distance of the slit from the screen is $D = 5.937 \ m$

The number of bright fringe is $n = 24$

The length the fringes span is $L = 39.835 mm = \frac{39.835 }{1000} = 0.0398 m$

The fringe width (i.e the distance of between two successive bright or dark fringe) is mathematically represented as

$\beta = \frac{\lambda D}{d}$

Where d is the distance between the slits

$\beta$ is the fringe width which can also be evaluated as

$\beta = \frac{L}{n}$

Substituting values

$\beta = \frac{0.0398}{24}$

$\beta = 1.660 *10^{-3}$

Making d the subject of formula in the above equation

$d = \frac{\lambda D}{\beta }$

Substituting values

$d = \frac{406.192 *10^{-9} * 5.937 }{1.660 *10^{-3}}$

$d = 0.00145m$

4 0

4 years ago

rock that is composed of different layers can begin eroding from the inside this creating an arch true or false

Naddik [55]

True true true true true teue

8 0

3 years ago

Read 2 more answers

The propeller of a World War II fighter plane is 2.30 m in diameter. (a) What is its angular velocity in radians per second if i

Sergio [31]

Answer with Explanation:

We are given that

Diameter of fighter plane=2.3 m

Radius= $r=\frac{d}{2}=\frac{2.3}{2}=1.15 m$

a.We have to find the angular velocity in radians per second if it spins=1200 rev/min

Frequency= $\frac{1200}{60}=20 Hz$

1 minute=60 seconds

Angular velocity= $\omega=2\pi f$

Angular velocity= $2\times \frac{22}{7}\times 20=125.7 rad/s$

b.We have to find the linear speed of its tip at this angular velocity if the plane is stationary on the tarmac.

$v=r\omega=1.15\times 125.7=144.56 m/s$

c.Centripetal acceleration= $\omega^2 r=(125.7)^2(1.15)=18170.56 m/s^2$

Centripetal acceleration== $\frac{18170.56\times g}{9.81}=1852.25 g m/s^2$

7 0

4 years ago

Which of the following is not true? A) The energy of the sun comes from nuclear fusion. B) The fuel for nuclear fusion comes fr

denpristay [2]

Answer:

Option B) The fuel for nuclear fusion comes from sea water

Explanation:

Nuclear fusion can not be carried out by using any type of water as water is composed of stable water molecules ( $H_{2}O$ which is quite difficult to be decayed by any simple method.

Moreover, fusion reactions demands the combination of nuclei of lighter elements for which it makes use of the heavy isotopes of Hydrogen that are Deuterium and Tritium as fuel to carry out the nuclear fusion.

4 0

3 years ago