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4 years ago

Substances that cannot be broken down into other substances are called __________. -compounds -protons -neutrons -elements

Physics

1 answer:

denpristay [2]4 years ago

5 0

Answer:

Substances that cannot be broken down into other substances are called elements.

Explanation:

Elements are pure substances that cannot be broken down into other elements through any non-nuclear means. For example: hydrogen, helium, lithium, beryllium, boron, and carbon.

A list of the elements can be found in a periodic table.

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I’m not sure how to solve this

spayn [35]

Answer:

Option 10. 169.118 J/KgºC

Explanation:

From the question given above, the following data were obtained:

Change in temperature (ΔT) = 20 °C

Heat (Q) absorbed = 1.61 KJ

Mass of metal bar = 476 g

Specific heat capacity (C) of metal bar =?

Next, we shall convert 1.61 KJ to joule (J). This can be obtained as follow:

1 kJ = 1000 J

Therefore,

1.61 KJ = 1.61 KJ × 1000 J / 1 kJ

1.61 KJ = 1610 J

Next, we shall convert 476 g to Kg. This can be obtained as follow:

1000 g = 1 Kg

Therefore,

476 g = 476 g × 1 Kg / 1000 g

476 g = 0.476 Kg

Finally, we shall determine the specific heat capacity of the metal bar. This can be obtained as follow:

Change in temperature (ΔT) = 20 °C

Heat (Q) absorbed = 1610 J

Mass of metal bar = 0.476 Kg

Specific heat capacity (C) of metal bar =?

Q = MCΔT

1610 = 0.476 × C × 20

1610 = 9.52 × C

Divide both side by 9.52

C = 1610 / 9.52

C = 169.118 J/KgºC

Thus, the specific heat capacity of the metal bar is 169.118 J/KgºC

6 0

3 years ago

Which property of a body resists change from a state of rest or of motion?

jeyben [28]

Answer:

mass

Explanation:

As this is directly related to inertia. Inertia is the property of unit which resists the change of state of rest or motion

7 0

2 years ago

Read 2 more answers

Which of the following statements BEST explains why ball-and-socket joints have the greatest range of motion?

galina1969 [7]

Answer:

its d on edge c:

5 0

3 years ago

A mass m = 0.6 kg is released from rest at the top edge of a hemispherical bowl with radius = 1.1 meters. The mass then slides w

Aneli [31]

Answer:

The angle is $\theta = 36.24 ^o$

Explanation:

From the question we are told that

The mass is $m = 0.6 \ kg$

The radius is $r = 1.1 \ m$

The speed is $v = 3.57 \ m /s$

According to the law of energy conservation

The potential energy of the mass at the top is equal to the kinetic energy at the bottom i.e

$m * g * h = \frac{1}{2} * m * v^2$

=> $h = \frac{1}{2 g } * v^2$

Here h is the vertical distance traveled by the mass which is also mathematically represented as

$h = r * sin (\theta )$

$\theta = sin ^{-1} [ \frac{1}{2* g* r } * v^2]$

substituting values

$\theta = sin ^{-1} [ \frac{1}{2* 9.8* 1.1 } * (3.57)^2]$

$\theta = 36.24 ^o$

3 0

4 years ago

A rocket with a mass of 2.0 Ã 106 kg is designed to take off from the surface of the earth by burning fuel and ejecting it with

julsineya [31]

thrust force getting from the burning of mass should balance the weight of the rocket

here thrust force is given as

$F_t = v\frac{dm}{dt}$

now by force balance we can say

$mg = v \frac{dm}{dt}$

now plug in all values in this

$(2 \times 10^6)(9.8) = 3500 \times \frac{dm}{dt}$

$\frac{dm}{dt} = \frac{19.6 \times 10^6}{3500}$

$\frac{dm}{dt} = 5600 kg/s$

so rate of mass burning per second will be 5600 kg per second in order to lift up the rocket

6 0

3 years ago