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photoshop1234 [79]
3 years ago
12

Waves are common in nature because many different ____________ produce waves

Physics
1 answer:
Kamila [148]3 years ago
3 0

Answer:B

Explanation:

You might be interested in
А)
loris [4]

Image of the plate is missing, so i have attached it.

Answer:

A) t = 7.854 mm

B) σ = 26.67 MPa

Explanation:

A) From shearing of rivet, formula for pressure is;

P = τ•A_rivets

Where;

τ is allowable stress

A_rivets is Area of rivet

We are given:

τ = 60 MPa

Diameter; d = 20 mm

A_rivets = πd²/4 = π × 20²/4 = 100π

Thus;

P = 60 × 100π

P = 6000π N

From bearing of plate material, we can calculate pressure as;

P = σ_b•A_b

We are given;

σ_b = 120 MPa

A_b is area of plate = 20t

Where t is the thickness

Thus;

6000π = 120 × 20t

t = 6000π/(120 × 20)

t = 7.854 mm

B) Largest average tensile stress is given by the formula;

σ = P/A

Where A = 110t - 20t

A = 90t

A = 90 × 7.854

Thus;

σ = 6000π/(90 × 7.854)

σ = 26.67 MPa

8 0
3 years ago
Why is radiation often used to destroy cancer cells ?
zimovet [89]

Answer:

C

Explanation:

Radiation affects both cancer cells and healthy cells, but it affects cancer cells more.

8 0
3 years ago
A ball is projected horizontally from a table 1.0 m high and hits the ground after falling from a time t=0.45s. If the ball trav
photoshop1234 [79]

The initial velocity is 6.7 m/s

Explanation:

The motion of the ball is a projectile motion, therefore it consists of two independent motions:  

- A uniform motion (constant velocity) along the horizontal direction  

- A uniformly accelerated motion, with constant acceleration (acceleration of gravity) in the downward direction  

In this problem, we just need to analyze the horizontal motion: the horizontal velocity is constant, therefore the horizontal distance travelled is given by

x=v_x t

where

v_x is the horizontal velocity

t is the time of flight

Here we have:

t = 0.45 s

x = 3.0 m

And so solving for v_x, we find

v_x = \frac{3.0}{0.45}=6.7 m/s

And since the ball was initially projected horizontally, this is also the initial velocity.

Learn more about projectile motion:

brainly.com/question/8751410

#LearnwithBrainly

3 0
3 years ago
How far will a freely falling object fall from rest in five seconds? six seconds?
Vanyuwa [196]
Distance = 1/2*gravity*velocity^2 
<span>So plugging: 1/2 * 9.8 * 25 = 122.5units
 and is six second
</span><span>Distance = 1/2*gravity*velocity^2 
</span><span>So plugging: 1/2 * 9.8 * 36= 176.4 units</span>
4 0
3 years ago
Need help with is if u can asap
jeka94
I am guessing by what I had it is a plz don't quote me on that I could be wrong
8 0
3 years ago
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