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Ghella [55]
3 years ago
11

Describe the general characteristics of metals nonmetals and metalloids

Physics
1 answer:
ELEN [110]3 years ago
3 0

Answer:

Characteristics of metals :

1. Good conductor of electricity and heat

2. Ductile in nature

3.Generally having high melting point temperature

4.It have good malleable property

5.Generally higher density

6.Generally metals are solid at room temperature.

Characteristics of nonmetals :

1.Poor conductor of electricity and heat

2.Brittle in nature

3.Generally having low melting point temperature

4. Appearance is dull

5.Generally lower density

Characteristics of metalloids :

1.These materials are in between metals and nonmetals

2.Conductivity more than nonmetals but less than metals

3.Generally used for making semiconductors

4.Appearance can be shiny or dull

5.They exits in the number of forms.

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3 years ago
A car moves along an x axis through a distance of 900 m, starting at rest (at x = 0) and ending at
OlgaM077 [116]
A car moves along an x axis through a distance of 900 m, starting at rest (at x = 0) and ending at rest (at x = 900 m). Through the first 1/4 of that distance, its acceleration is +6.25 m/s2. Through the next 3/4 of that distance, its acceleration is -2.08 m/s2. What are (a) its travel time through the 900 m and (b) its maximum speed? 

<span>Solve for the time at the 1/4 mark. That's 225 m. How? d = (1/2)at^2 ( initial velocity zero). Thus 225 = (1/2) 6.25 t^2. t^2 = ( 225 * 2 ) / 6.25. t = 8.5 sec. </span>

<span>At the other end t^2 = (675 * 2) / 2.08 -- we reversed the sign and ran time backwards. t = 25.5 sec. </span>

<span>So total time is 8.5 + 25.5 or 34 sec. </span>

<span>Since zero initial velocity: v^2 = 2 a d. Here, v^2 = 2 * 6.25 * 225. v = 53 m/s. That's the fastest speed since braking then occurs.</span>
7 0
4 years ago
A skater pushes off a wall and skates backward for a few meters before stopping.
Inessa05 [86]

Answer:

F

Explanation:

Newton's Third Law (Law of Action-Reaction) states:

Every action has an equal and opposite reaction and it occurs between two objects

In this scenario, the action would be the skater pushing off of the wall, therefore the reaction would be the wall pushing off of the skater since the two objects that are interacting are the wall and the skater.

6 0
2 years ago
Calculate the tension (in N) in a vertical strand of spiderweb if a spider of mass 5.00 ✕ 10-5 kg hangs motionless on it.
Mandarinka [93]

Answer:

4.9 x 10⁻⁴N

Explanation:

Given parameters:

Mass of the vertical strand of spiderweb  = 5 x 10⁻⁵kg

Unknown:

Tension in the vertical strand  = ?

Solution:

The tension is the vertical strand will be the weight of the strand.

  Weight of strand  = mg

m is the mass

g is the acceleration due to gravity = 9.8m/s²

Tension in the vertical strand  = 5 x 10⁻⁵kg  x 9.8m/s²

Tension in the vertical strand  = 4.9 x 10⁻⁴N

3 0
3 years ago
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