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3 years ago

The law of equal areas suggests that planets move fastest when at and slowest when at .

1 answer:

5 0

The law of equal areas suggests that planets move fastest when at "perihelion" at slowest when at the "aphelion." Perihelion refers to the point at a planet's orbit, comet or asteroid where it is closest to the sun. Aphelion <span>refers to the point at a planet's orbit, comet or asteroid where it is furthest to the sun.</span>

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Two cars collide at an icy intersection and stick together afterward. The first car has a mass of 1200 kg and was approaching at

GuDViN [60]

Answer:

a) v = 11.24 m / s , θ = 17.76º b) Kf / K₀ = 0.4380

Explanation:

a) This is an exercise in collisions, therefore the conservation of the moment must be used

Let's define the system as formed by the two cars, therefore the forces during the crash are internal and the moment is conserved

Recall that moment is a vector quantity so it must be kept on each axis

X axis

initial moment. Before the crash

p₀ₓ = m₁ v₁

where v₁ = -25.00 me / s

the negative sign is because it is moving west and m₁ = 900 kg

final moment. After the crash

$p_{x f}$ = (m₁ + m₂) vx

p₀ₓ = p_{x f}

m₁ v₁ = (m₁ + m₂) vₓ

vₓ = m1 / (m₁ + m₂) v₁

let's calculate

vₓ = - 900 / (900 + 1200) 25

vₓ = - 10.7 m / s

Axis y

initial moment

$p_{oy}$ = m₂ v₂

where v₂ = - 6.00 m / s

the sign indicates that it is moving to the South

final moment

p_{fy}= (m₁ + m₂) $v_{y}$

p_{oy} = p_{fy}

m₂ v₂ = (m₁ + m₂) v_{y}

v_{y} = m₂ / (m₁ + m₂) v₂

we calculate

$v_{y}$ = 1200 / (900+ 1200) 6

$v_{y}$ = - 3,428 m / s

for the velocity module we use the Pythagorean theorem

v = √ (vₓ² + v_{y}²)

v = RA (10.7²2 + 3,428²2)

v = 11.24 m / s

now let's use trigonometry to encode the angle measured in the west clockwise (negative of the x axis)

tan θ = $v_{y}$ / Vₓ

θ = tan-1 v_{y} / vₓ)

θ = tan -1 (3,428 / 10.7)

θ = 17.76º

This angle is from the west to the south, that is, in the third quadrant.

b) To search for loss of the kinetic flow, calculate the kinetic enegy and then look for its relationship

Kf = 1/2 (m1 + m2) v2

K₀ = ½ m₁ v₁² + ½ m₂ v₂²

Kf = ½ (900 + 1200) 11.24 2

Kf = 1.3265 105 J

K₀ = ½ 900 25² + ½ 1200 6²

K₀ = 2,8125 10⁵ + 2,16 10₅4

K₀ = 3.0285 105J

the wasted energy is

Kf / K₀ = 1.3265 105 / 3.0285 105

Kf / K₀ = 0.4380

this is the fraction of kinetic energy that is conserved, transforming heat and transforming potential energy

5 0

3 years ago

compare the numbers of each subatomic particle found in both diagrams and then list what makes hydrogen diffrent from hellium

Cloud [144]

The helium atom is found to contain more particles than the hydrogen atom.

<h3>What is a subparticle?</h3>

An atom is composed of particles and these particles are electrons protons and neutrons. The collective name for these particles is the subatomic particles.

Now we know that the helium atom contains more sub atomic particles than the atom of hydrogen. This is because, the helium atom contains two neutrons and two protons as well as two electrons. On the other hand, the hydrogen atom contains one neutron and one proton as well as one electron.

Thus, the helium atom is found to contain more particles than the hydrogen atom.

Learn more about helium atom:brainly.com/question/4945478

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7 0

1 year ago

The ____ method of assessing intake is time consuming, and the results may not be accurate if subjects modify their eating habit

Gelneren [198K]

Answer:

Food record

Explanation:

A food record method is an assessment, study or act of collecting data related to food.

Although Food record method is time consuming and may not be accurate if subjects modify their eating habits during the time of the study the data collected here are of great importance. Some of the importance are;

(1). It helps in the registration of foods.

(2). The data can be used to describe a population's intake.

(3). The data can be used as a reference parameter in validation studies.

(4). The data can also be used with the Food Frequency Questionnaire.

It other disadvantage apart from its time consuming and error that might occur during the process of conducting the research is that it might be burdensome to the respondents.

6 0

3 years ago

A wave oscillating on a string has a wavelength of 0.25 m and a frequency of 1.85 Hz. What is the speed of this wave?

Vinil7 [7]

Answer:

Explanation: Hope this helps Sorry if it dosent

4 0

3 years ago

Thinking about planck's law, which star would give off the most orange light?

stiks02 [169]

Thinking about Planck's law, the Red star would give off the most orange light.

According to Planck's Law, distinct atoms and molecules can emit or take in power in discrete portions simplest. The smallest amount of strength that can be emitted or absorbed inside the form of electromagnetic radiation is called quantum.

Planck's Law describes the quantity of spectral radiance at a particular wavelength radiated through a black body in equilibrium. The equation is E=hv.

The floor temperature of a celeb determines the color of mild it emits. Blue stars are warmer than yellow stars, which are hotter than red stars. The bright orange celebrity Arcturus is particularly noteworthy for its massive right motion, The color is a characteristic of their floor temperatures.

Learn more about plank's law here:-brainly.com/question/1673393

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4 0

2 years ago