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Digiron [165]
3 years ago
13

a spring with an unknown force constant is compressed as shown. If the original length of the spring is 60cm, determine (a)the s

pring force constant (b) the compressive stress in the spring (c) the strain of the spring
Physics
1 answer:
aalyn [17]3 years ago
6 0
<span>(b) the compressive stress in the spring </span>
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Which equation represents mass-energy equivalence? E = m2c E = mc2 E = (mc)2 E = mc
motikmotik

Einstein's energy mass equivalence relation say that if the whole given mass is converted to energy then it would be

E = mc^2

where

m = mass in kg

c = speed of light in m/s

this is the origination of quantum physics and by this formula we can relate the dual nature of light and particle

So correct relation above will be

E = mc^2

4 0
3 years ago
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A Lamborghini Aventador engine reaches its top speed from rest in 3 seconds. The engine performs 1,545,000 Joules of work in tha
nikitadnepr [17]

Answer:

W = 1.545E6 J   total work

P = W / t = 1.545E6 J / 3 sec = 5.15E5 J/sec = 515,000 J/sec  (Watts)

Using definition of power

5 0
2 years ago
You are pushing a 60 kg block of ice across the ground. You exert a constant force of 9 N on the block of ice. You let go after
kotykmax [81]

Answer: d = 33 cm or 0.33 m

Explanation: In physics, Work is the amount of energy transferred to an object to make it move. It can be expressed by:

W = F.d.cosθ

F is the force applied to the object, d is the displacement and θ is the angle formed between the force and the displacement.

For the ice block, the angle is 0, i.e., force and distance are at the same direction, so:

W = F.d.cos(0)

W = F.d

To determine d:

d = \frac{W}{F}

d = \frac{3}{9}

d = 0.33 m

The distance d the block ice moved is 33 cm.

7 0
3 years ago
. A dog walks 14 m to the east and then 20 m back to the west. What is the distance? What is the displacement?​
Crank

Answer:

Hi...

14-20=-6...displacement

14+20=34...distance

3 0
2 years ago
Receiver
77julia77 [94]

Answer:

What is the best description for the volume of air volume of air provided in a high quality rescue breath?

Explanation:

A) only Enough air to create a visible rise of the chest.

B) Until you can no longer force air in.

C) plenty of air make sure it is adequate to sustain life

D) clear and obvious rise of the chest, sustained over a few seconds

5 0
2 years ago
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