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4 years ago

A material used for electrical wiring must have what?

1 answer:

4 0

Wire Materials: The most common material for electrical wire is copper and aluminum, these are not the best conductors however they are abundant and low cost. Gold is also used in applications because it is corrosion resistant.

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A 65 Kg roller-blade is accelerating at 5 m/s/s across the side walk. What force would be necessary for this acceleration to occ

Neporo4naja [7]

Newton's second law states that the force applied to an object is equal to the product between the mass m of the object and its acceleration a:
$F=ma$
Using $m=65 kg$ and $a=5 m/s^2$ , we can find the value of the force applied to the roller-blade to obtain this acceleration:
$F=(65 kg)(5 m/s^2)=325 N$

3 0

3 years ago

What types of energy are produced during firework displays?

-Dominant- [34]

Answer: The chemical energy is converted to heat, light ,sound and kinematic movements.

Explanation:

An exploding firework is essentially a number of chemical reactions happening simultaneously or in rapid sequence. When you add some heat, you provide enough activation energy (the energy that kick-starts a chemical reaction) to make solid chemical compounds packed inside the firework combust (burn) with oxygen in the air and convert themselves into other chemicals, releasing smoke and exhaust gases such as carbon dioxide, carbon monoxide, and nitrogen in the process. For example, this is an example of one of the chemical reactions that might happen when the main gunpowder charge burn.

some of the chemical energylocked inside them is converted into four other kinds of energy (heat, light, sound, and the kinetic energy of movement). According to a basic law of physics called the conservation of energy.

8 0

3 years ago

Read 2 more answers

Matter is made up of tiny particles which can be atoms,molecules, or electrically charged particles called?.

yuradex [85]

Answer: alpha particle. i think

Explanation:

6 0

3 years ago

In the sport of parasailing, a person is attached to a rope being pulled by a boat while hanging from a parachute-like sail. A r

Illusion [34]

Answer:

the weight of the rider is 493.53 N

Explanation:

Given the data in the question and as illustrated in the image below,

Tension T = 1900 N

the rider is moving at a constant speed so the net force in the horizontal direction will be 0

In the horizontal direction

F $_{sail$ cos( 30° ) = Tcos ( 17° )

F $_{sail$ = Tcos( 17° ) / cos( 30° )

F $_{sail$ = 1900cos( 17° ) / cos( 30° )

F $_{sail$ = 2098.07 N

Now, In the vertical direction,

F $_{sail$ sin( 30° ) = W + T sin( 17° )

W = F $_{sail$ sin( 30° ) - T sin( 17° )

W = 2098.07sin( 30° ) - 1900sin( 17° )

W = 1049.035 - 555.506

W = 493.53 N

Therefore, the weight of the rider is 493.53 N

7 0

3 years ago

Gravitational pull is determined by

nataly862011 [7]

Answer:

The gravitational pull is determined by the mass and distance.

Explanation:

According to Newton's law of universal gravitation

$F = G\frac{m1.m2}{r^{2} }$

where F is the gravitational pull, G is gravitational constant, m₁ and m₂ are masses of bodies and r is the distance between them.

It can be seen from the above equation that F is directly proportional to the product of the masses and inversely proportional to the square of distance between them.

F ∝ m₁m₂

F ∝ 1/r²

6 0

4 years ago