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Georgia [21]
3 years ago
9

Three common elements that can reorient their electrons into magnetic domains and become magnetic are iron, nickel, and ________

___.
aluminum
cobalt
uranium
Physics
1 answer:
ohaa [14]3 years ago
8 0

Answer:

Cobalt

Explanation:

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When light shines on a metal surface, the maximum energies of emitted electrons:
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Vary with the frequency of the light
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A motorcycle has a mass of 250kg. It goes around a 13.7 m radius turn at 96.5 km/hr. What is the centripetal force?
topjm [15]

Answer: c) 1.31 × 10⁴N

Explanation:

Centripetal force is a force that causes a body to move in a circular path. The body possesses a centripetal acceleration.

According to newtons first law

Force = mass (m) ×acceleration (a)

Acceleration of a body moving in a circular path = v²/r where;

v is the velocity and r is the radius

Force = MV²/r

Given m = 250kg v = 96.5km/hr r = 13.7m

We need to convert 96.5km/hr to m/s

= 96.5km ×1000/1hr × 3600

= 96,500/3,600

v = 26.8m/s

Force = 250 × 26.8²/13.7

Force = 13,106.5N

The centripetal force = 13,106.5N

= 1.31 × 10⁴N

4 0
3 years ago
A car advertisement claims their car can go from a stopped position to 60 miles per hour in 5 seconds. The advertisement is desc
Komok [63]

Answer:

Acceleration

Explanation:

The advertisement is describing the acceleration of the car.

Acceleration is the rate of change of velocity per unit of time. It can be expressed mathematically as;

 Acceleration  = \frac{v  - u}{t}  

 v is the final velocity

 u is the initial velocity

 t is the time taken

 Any quantity that specifies the rate of change of velocity of a body within a given time frame is describing its acceleration.

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What is the area of soft cartilage where bone growth occurs
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The area of <span>the epiphyseal plate belonging from a soft cartilage is where bone growth usually begins. The production of bones inside this tissue is due to a cell division by mitosis. In addition, this process of producing bone material to replace old bone structures is called ossification.</span>
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