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cupoosta [38]
3 years ago
14

What are the basic building blocks of matter?

Physics
1 answer:
Anton [14]3 years ago
5 0
I think atoms but I’m not 100% sure
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The cable supporting a 2130-kg elevator has a maximum strength of 2.18×104 n . what maximum upward acceleration can it give the
Vlada [557]

Answer;

=0.43 m/s²

Solution;

There will be the tension in the cable, T, upwards and the weight of the elevator, mg, downwards.  

By Newton's second law, the sum of the forces will be equal to mass×acceleration.  

Resultant force = m × a

Then T - mg = ma so the tension in the cable is  

T = m(g+a)  

The cable will break when T = 21,800 N  

Solving for a, that happens when  

a = 21800/2130 - g

    = 10.23 - g (in m/s^2)  

If you're using g = 9.8 m/s^2

Then the maximum acceleration allowed is 10.23-9.8 = 0.43 m/s^2

3 0
3 years ago
A slingshot fires a pebble from the top of a building at a speed of 17.5 m/s. The building is 31.5 m tall. Ignoring air resistan
Jlenok [28]

Answer:

The speed with which the pebble strikes the ground is 30.4m/s

Explanation:

Initial velocity (u) = 17.5m/s, height (h) = 31.5m, acceleration due to gravity (g) = 9.8m/s^2

V^2 = u^2 + 2gh = 17.5^2 + 2×9.8×31.5 = 306.25 + 617.4 = 923.65

V^2 = 923.65

V = √923.65 = 30.4m/s

6 0
3 years ago
How do electric and magnetic fields interact in an electromagnetic wave?
kotegsom [21]

Answer:

Electric and magnetic field waves are oriented at 90 degree angles relative to each other.

Explanation:

8 0
3 years ago
Compare waves on a pond and electromagnetic waves. 1. A wave on a pond is a mechanical wave which doesn’t require a medium to tr
s2008m [1.1K]

Answer:

The correct answer is the number 4. A wave on a pond is a mechanical wave which requires a medium to travel.

Explanation:

Mechanical waves are those that need a material medium to propagate. The waves of the sea and the waves that we produce on a guitar string, the sound, are examples of mechanical waves. Electromagnetic waves are energetic pulses capable of propagating in a vacuum. This way, a wave on a pond is a mechanical wave which requires a medium to travel.

8 0
3 years ago
Which best describes a force?
sashaice [31]
Force = mass*acceleration.

Therefore, a force has a magnitude and direction.
5 0
3 years ago
Read 2 more answers
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