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3 years ago

Arches National Park, Utah Constructive or Desructive force

1 answer:

5 0

The park was caused by the destructive force of erosion, and the constructive force of salt beds caused by the evaporation of a sea 300 million years ago (just one example). There have been several different events that built up and then eroded away softer structures, leaving behind the sandstone towers.

The latest was destructive forces caused by erosion of younger, softer layers of rock leaving the older, denser towers.

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A bowling ball weighs 7.26 kg and takes 3.64 seconds to travel the 19.2 m length of the bowling alley. assuming the velocity is

Sergeeva-Olga [200]

The answer is attached.

3 0

3 years ago

Before going in for an annual physical, a 70.0-{\rm kg} person whose body temperature is 37.0{\rm ^{\circ} C} consumes an entire

Grace [21]

Answer:

A) The person's body temperature T_final after equilibrium is attained = 36.85°C

B) The change in the person's temperature after equilibrium is attained = 0.15°C

A high-quality medical thermometer can measure temperature changes as small as 0.1°C, hence, YES, it would detect the minute drop by 0.15°C too.

Explanation:

If we assume that the soft drink has the same density as water (since it is stated in the question that it is mostly water).

Density of water = 1 g/mL = 1 kg/L

Ignoring any heating by the person's metabolism,

A) So, heat lost by the human body = heat gained by the soft drink as it attains thermal equilibrium with the human body

Let the final temperature of the human body + soft drink set up be T

Heat lost by the human body = mCΔT

m = mass of the human body = 70.0 kg

C = Specific heat capacity of the human body = 3480 J/kg.K

ΔT = Temperature change of the human body = 37 - (Final temperature) = 37 - T

Heat lost by the body = 70 × 3480 × (37 - T)

= (9,013,200 - 243,600T) J

Heat gained by soft drink = mCΔT

m = mass of the soft drink = density × volume = 1 × 0.355 = 0.355 kg

C = specific heat capacity of the soft drink = specific heat capacity of the soft drink = 4182 J/kg.K

ΔT = (final temperature) - 12 = (T - 12)

Heat gained by the soft drink = 0.355 × 4182 × (T - 12) = (1,484.61T - 17,815.32) J

heat lost by the human body = heat gained by the soft drink as it attains thermal equilibrium with the human body

(9,013,200 - 243,600T) = (1,484.61T - 17,815.32)

9,013,200 + 17,815.32 = 1,484.61T + 243,600T

9,031,015.32 = 245,084.61T

T = (9,031,015.32/245,084.61)

= 36.8485614825 = 36.85°C

B) The change in the person's temperature = 37 - 36.85 = 0.15°C

A high-quality medical thermometer can measure temperature changes as small as 0.1°C, hence it would detect the minute drop by 0.15°C too.

Hope this Helps!!!

5 0

4 years ago

Particles in an object are constantly moving. The particles also attract and repel each other. Which can this attraction and mov

Fed [463]

The cause of attraction and movement in terms of repulsion and attraction is caused electromagnetic properties of the particles. The basic rule of magnetism is like attracts unlike while like repels like. This rule is useful in the application of electricity

6 0

3 years ago

If the temperature of the solar surface is 5800 K and Wien's law for the peak wavelength of the spectrum of the Sun, assumed to

enot [183]

Answer:

The dominant wavelength of the sun is $499.65nm$

Explanation:

Wien's law is defined as:

$\lambda_{max} T = c$ (1)

Where $\lambda_{max}$ is the maximum wavelength, c is the Wien's constant and T is the temperature.

Therefore, $\lambda_{max}$ can be isolated from equation 1.

$\lambda_{max} = \frac{c}{T}$ (2)

$\lambda_{max} = \frac{2.898x10^{-3}m\cdot K}{T}$

Notice that it is necessary to express the Wien's constant in units of meters

$c = 2.898x10^{-3}m\cdot K . \frac{1x10^{9}nm}{m}$ ⇒ $2.898x10^{6} nm \cdot K$

Finally, equation 2 can be used:

$\lambda_{max} = \frac{2.898x10^{6} nm \cdot K}{5800 K}$

$\lambda_{max} = 499.65nm$

Hence, the dominant wavelength of the sun is $499.65nm$

6 0

4 years ago

The oxygen molecule, O2, has a total mass of 5.30×10-26 kg and a rotational inertia of 1.94×10-46 kg-m2 about an axis perpendicu

Nady [450]

Answer:

$\omega=2.85*10^{13}\frac{rad}{s}$

Explanation:

The translational kinetic energy depends on the mass and speed of the body, as follows:

$K_T=\frac{mv^2}{2}\\K_T=\frac{5.30*10^{-26}kg(1.49*10^3\frac{m}{s})^2}{2}\\\\K_T=1.18*10^{-19}J$

While rotational kinetic energy depends on the moment of inertia and the angular velocity of the body, as follows:

$K_R=\frac{I\omega^2}{2}(1)$ . We know that:

$K_R=\frac{2}{3}K_T(2)$

Replacing (1) in (2):

$\frac{I\omega^2}{2}=\frac{2}{3}K_T\\\\\omega=\sqrt{\frac{4}{3}\frac{K_T}{I}}\\\omega=\sqrt{\frac{4}{3}\frac{1.18*10^{-19}J}{1.94*10^{-46}kg\cdot m^2}}\\\omega=2.85*10^{13}\frac{rad}{s}$

4 0

4 years ago