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worty [1.4K]
3 years ago
6

Which of the following describes a study that is “longitudinal”?

Chemistry
1 answer:
jolli1 [7]3 years ago
7 0

Answer:

A longitudinal study is a observational study that follows the same subjects repeatedly over a period of time, in some cases from birth to death

or

the same adults are tested at each time point: 20, 30, and 40 years of age

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In the Rutherford nuclear-atom model, ________.
max2010maxim [7]
A, the protons and neutrons are heavier than electrons. The electrons orbit the nucleus, and have negligible mass.
3 0
2 years ago
A sugar solution is 15% pure. How
Arada [10]

Answer:

Amount of sugar in solution = 82.5 gram

Explanation:

Given:

Sugar in solution percentage = 15%

Total solution = 550 grams

Find:

Amount of sugar in solution

Computation:

Amount of sugar in solution = Sugar in solution percentage x Total solution

Amount of sugar in solution = 15% X 550

Amount of sugar in solution = 82.5 gram

8 0
3 years ago
Horticulturists know that, for many plants, dark green leaves are associated with low light levels and pale green with high leve
nikitadnepr [17]
  • In the reduction process of photosynthesis, electrons are transported from water to carbon dioxide.
  • According to photon theory here the photons behave as light energy particle.
  • By capturing sun energy (photons), chlorophyll aids in this process.An electron in the chlorophyll molecule gets excited from a lower to a higher energy state when chlorophyll receives energy from sunlight.
  • Excessive sunshine is the main cause of leaves turning a darker green color. Lack of sunlight causes a plant's leaves to create more chlorophyll, which is what gives the plant its green hue.
  • The color of the leaf is darker green than typical because of the increase in chlorophyll concentration per unit area.
<h3>What is photon theory?</h3>

The photon theory of light states that photons have simultaneous particle and wave behavior. pass through empty space at a constant speed, or "the speed of light". possess rest energy and zero mass.

Learn more about photon theory here:

brainly.com/question/3479307

#SPJ4

7 0
2 years ago
A 975 L balloon contains helium. On the ground the temperature is 30 0C and the pressure is 743 torr. What will be the balloon's
Archy [21]

Answer:

V₂ = 1518L

Explanation:

-Using combined gas law:

\frac{P_1V_1}{T_1} =\frac{P_2V_2}{T_2}

<em>Where P is pressure, V is volume and T is absolute temperature of 1, initial state and 2, final state of the gas.</em>

<em />

<em>Initial states:</em>

P₁ = 743 torr

V₁ = 975L

T₁ = 30°C + 273.15K = 303.15K

P₂ = 375 mmHg = torr

V₂ = Our incognite

T₂ = -35°C + 273.15K = 238.15K

Replacing:

\frac{743torr*975L}{303.15K} =\frac{375torrV_2}{238.15K}

<h3>V₂ = 1518L</h3>
6 0
3 years ago
How is energy and gravity related to speed?
slavikrds [6]

Answer:

In classical theories of gravitation, the changes in a gravitational field propagate. A change in the distribution of energy and momentum of matter results in subsequent alteration, at a distance, of the gravitational field which it produces.

Explanation:

5 0
3 years ago
Read 2 more answers
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