Ask question

Ask question

All categories

2 years ago

12

A 3m plank AB of mass 20kg has a center of gravity 2m from end A and rests on supports R1 and R2 both 0,5m from either end. It a

lso carries a 10kg block at end A. Calculate the reactions at R1 and R2

1 answer:

postnew [5]2 years ago

5 0

Answer:

130.7 N

Explanation:

You might be interested in

If you decrease the frequency of a vibrating object to one fourth ,its period becomes

shepuryov [24]

It's period would become D

4 0

3 years ago

Calculate the wavelength (in nm) of light that produces its first minimum at an angle of 21.0° when falling on a single slit of

Cerrena [4.2K]

To solve this problem it is necessary to apply the related concepts to the principle of overlap, specifically to single slit diffraction experiment concept.

Mathematically this can be expressed as:

$dsin\theta = m\lambda$

Where,

d = Width of the slit

$\lambda =$ Wavelength

$\theta =$ Angle relative to the original direction of the light

m = Any integer which represent the order of the equation (number of repetition of the spectrum)

To solve the problem we need to rearrange the equation and find the wavelength

$\lambda = \frac{dsin\theta}{m}$

Our values are given as,

$d = 1.46\mu m = 1.46*10^{-6}m$

$\theta = 21\°$

$m = 1$

Replacing in our equation we have,

$\lambda = \frac{dsin\theta}{m}$

$\lambda = \frac{(1.46*10^{-6})sin(21)}{1}$

$\lambda = 5.232*10^{-7}m$

$\lambda = 523.2nm$

Therefore the wavelength is 523.2nm

7 0

4 years ago

4 The time to failure of an electrical component has a Weibull distribution with parameters λ = 0.056 and a = 2.5. A random coll

vivado [14]

Answer:

the probability that at least 125 of the 500 components will have failure times larger than 20 is 0.7939

Explanation:

see the attached file

5 0

4 years ago

Why was the Battle of the Bulge significant?

slavikrds [6]

The Battle of the Bulge in the winter of 1944 was the last Great German offensive of the Second World War.

7 0

3 years ago

An elephant pushes with 2000 N on a load of trees. It then pushes these trees for 150 m. How much work did the elephant d

LiRa [457]

Answer:

300000

Explanation:

2000×150= 300000

6 0

3 years ago