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2 years ago

What does it mean to say that some elements are reactive and form ions easily whereas others do not?

Physics

1 answer:

butalik [34]2 years ago

4 0

Answer:

Some elements are reactive because the outermost energy levels of their atoms are only partially filled. Therefore, these atoms can easily gain or lose electrons to form ions. The atoms of nonreactive elements have filled outermost energy levels

Explanation:

hope this answers your ?

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What determines an object’s thermal energy

Tems11 [23]

Answer:

temperature and mass

Explanation:

The higher the temperature of a given quantity of a substance, more is its thermal energy.

If a substance contains more mass, this also implies that the object has more particles in it . hence, it has high thermal energy.

Additional Information :

Temperature is a measure of the average kinetic energy of the particles of a substance.

The thermal energy of an object depends on three factors:

number of molecules in the object
temperature of the object.
thermal energy it has.

3 0

3 years ago

A cathode ray tube is made of glass with a small amount of some kind of gas in it. It has metal electrodes at each end to pick u

LuckyWell [14K]

Scientists could investigate this idea by making cathode ray tubes out of different materials to see if the ray was the same.

6 0

3 years ago

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Help me again...(science)

Lapatulllka [165]

The first question would be A
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3 years ago

What is the average power dissipated by a resistor of resistance R = 25 Ω in an LRC circuit for which the power factor is equal

olga55 [171]

Answer:

0.08 w

Explanation:

AVERAGE POWER : Average power is defined as the average work per unit time. average power is denoted by P its depend on the voltage current and power factor.

the expression for the average power is given as

P= $V_r$ $I_r$ cosΦ

We have given maximum voltage =8 volt

$V_r$ = $\frac{8}{1.414}$

power factor =.25

resistance =25Ω

power factor = $\frac{R}{Z}$

power factor= $\frac{25}{Z}$

From here Z=100

P= $\frac{8}{1.414}$ × $\frac{v_r}{Z}$ ×cosΦ

=5.6577×0.05677×0.25

=0.08w

3 0

4 years ago

A ball is thrown horizontally from the top of a building 100m high. The ball strikes the ground at a point 120 m horizontally aw

pshichka [43]

Answer:

44.3 m/s

Explanation:

Given that a ball is thrown horizontally from the top of a building 100m high. The ball strikes the ground at a point 120 m horizontally away from and below the point of release.

What is the magnitude of its velocity just before it strikes the ground ?

The parameters given are:

Height H = 100m

Since the ball is thrown from a top of a building, initial velocity U = 0

Let g = 9.8m/s^2

Using third equation of motion

V^2 = U^2 + 2gH

Substitute all the parameters into the formula

V^2 = 2 × 9.8 × 100

V^2 = 200 × 9.8

V^2 = 1960

V = 44.27 m/s

Therefore, the magnitude of its velocity just before it strikes the ground is 44.3 m/s approximately

6 0

3 years ago