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4 years ago

What do scientists use to divide the geologic time scale?

Physics

1 answer:

dmitriy555 [2]4 years ago

3 0

The use Major changes in mineral deposits in the rock layers.

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Why should we change away from using incandescent light bulbs

Maurinko [17]

They are energy inefficient

Explanation:

The main reason why we must change away from using incandescent lighting bulbs is because of their energy inefficiency.

Much of the power consumed is used in producing heat in an incandescent bulb.
Therefore, they are energy inefficient.
Energy saving bulbs produces less heat and they are more durable.
Most energy saving bulbs are typically more expensive.
Most incandescent bulbs are also not environmentally friendly.

Learn more:

Electric bulb brainly.com/question/10421964

#learnwithBrainly

8 0

3 years ago

How much work is done if you push a box 200 meters with a force of 35 newtons answer?

VashaNatasha [74]

Work = force × distance
= 35 N × 200 m
= 7000 J

4 0

3 years ago

A spacecraft is fueled using hydrazine (N2H4; molecular weight of 32 grams per mole [g/mol]) and carries 1640 kilograms [kg] of

Sauron [17]

Answer:

The value is $t = 689.029 \ hours$

Explanation:

From the question we are told that

The molar mass of hydrazine is $Z = 32 g/mol = \frac{32}{1000} = 0.032 \ kg/mol$

The initial temperature is $T_i = -186 ^o F = (-186-32) *\frac{5}{9} +273.15 = 152\ K$

The final temperature is $T_f = 78 ^o F = (78-32) *\frac{5}{9} +273.15 = 298.7 \ K$

The specific heat capacity is $c_h = 0.099 [kJ/(mol K)] = 0.099 *10^3 J/(mol/K)$

The power available is $P = 300 \ W$

The mass of the fuel is $m = 1640 \ kg$

Generally the number of moles of hydrazine present is

$n = \frac{m}{Z}$

=> $n = \frac{1640}{= 0.032}$

=> $n = 51250 \ mol$

Generally the quantity of heat energy needed is mathematically represented as

$Q = n * c_h * (T_f -T_i)$

=> $Q = 51250 * 0.099 *10^3 * (298.7 - 152)$

=> $Q = 7.441516913 * 10^{8} \ J$

Generally the time taken is mathematically represented as

$t = \frac{Q}{P}$

=> $t = \frac{7.441516913 * 10^{8} }{300}$

=> t = 2480505.6377 s

Converting to hours

$t = \frac{2480505.6377}{3600}$

=> $t = 689.029 \ hours$

6 0

3 years ago

The direction of the acceleration of an object on a(n) _______________________ path is toward the _______________________ of the

aleksandrvk [35]

Answer:

circular...center

Explanation:

Physics

8 0

3 years ago

Select the correct answer.

Effectus [21]

A. logic, would be your answer i believe!

4 0

2 years ago