Scientists infer that early North American humans hunted the mastodon. Carbon-14 dating of the rib bone indicates that 2.4 half-lives have passed since the mastodon was killed. Approximately how many years ago did the mastodon die?


I know the answers are online, but like I need somebody to explain how you get the answer.

Answer:

An object that weighs 20 kg

Explanation:

Acceleration and mass are indirectly proportional.

Answer:

Dont kno

Explanation:

Dont  

from

∆H=MC∆T

but M=1Kg=1000g

∆T=10°C

C=0.466J/g°C

∆H=(1000×0.466×10)Joule

=4660J

explanation

When heat energy is added to a substance, the temperature will change by a certain amount. The relationship between heat energy and temperature is different for every material, and the specific heat is a value that describes how they relate.

heat energy = (mass of substance)(specific heat)(change in temperature)

Q = mc∆T

Q = heat energy (Joules, J)

m = mass of a substance (kg)

c = specific heat (units J/kg∙K)

∆ is a symbol meaning "the change in"

∆T = change in temperature (Kelvins, K

The entire electromagnetic spectrum, from the lowest to the highest frequency (longest to shortest wavelength), includes all radio waves (e.g., commercial radio and television, microwaves, radar), infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays.

False, There is other things aswell

The answers to your questions are as written below:

A negatively charged molecule move inwards when placed in an electric field while positively charged molecule placed in a electric field will move outwards the electric field.

A neutral/uncharged molecule will remains still when placd in an elctric field due to the absence of charges.

Hence we can concude that the answers to your questions are as listed above.

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attached below is the missing image

Answer:

Sound waves are able to go throught some objects.

Explanation:

The electromagnetic spectrum which is high enough to warm food without having ionizing impacts include:

This involves an atom or a molecule gaining or losing electrons to form charged ion.

The electromagnetic spectrum wit long wavelengths will have enough energy to warm it without ionizing impacts and they are mentioned above.

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Answer:

200

Explanation:

P = M x V

P = 8 x 25

P = 200

Angular frequency in radian per second for 20 vibrations in 10 seconds is 12.6 rad/s

Angular frequency is the number of vibrations in radian per second.

The total number of vibrations n is 20 and the time taken for these vibrations is 10 s

The frequency of the vibrations will be

f = 20 / 10 = 2 Hz

Angular frequency is related to the frequency as

ω = 2πf

ω=2π × 2

ω = 12.6 rad/s

Thus, the angular frequency is 12.6 rad/s.

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Answer: The churning nuclear forges at the centres of stars produce light and heat, creating stars.

Explanation:

Answer: Hyrdrogen and Helium.

Explanation:

Answer:

cohesive properties

Explanation:

The property of cohesion allows liquid water to have no tension on the surface.

Answer:

Cohesive properties

Explanation:

The wavelength of the wave which is travelling along right with speed of 0. 5 m/s time 4 second point is 2.

Speed of wave is the rate by which the wave travels. It can be described as the distance cover by the crest or thrust of it per unit of time. It can be calculated with the following formula,

[tex]v=f\times\lambda[/tex]

Here, (f) is the frequency and (λ) is the wavelength.

The frequency is inverse of time. Thus, the value of frequency in time t is,

[tex]f=\dfrac{1}{t}\\f=\dfrac{1}{4}\\f=0.25[/tex]

The speed of the wave is 0.5 m/s. Put the values in the formula,

[tex]v=f\times\lambda\\0.5=0.25\times\lambda\\\lambda=\dfrac{0.5}{0.25}\\\lambda=2[/tex]

Thus, the wavelength of the wave which is travelling along right with speed of 0. 5 m/s time 4 second point is 2.

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Answer:

1 meter for this wave

Explanation:

Amplitude is the height of the wave from the midline to the crest

The Renaissance astronomer who wrote the pioneering book that suggested the Earth probably orbits the Sun was Copernicus.

An astronaut observes and performs the experiments based on the universe.

The astronomer observes the universe and its components closely using telescope being on the Earth. While the astronaut goes into space to look in closely.

The astronomer who gave the observation that Earth is orbiting around the Sun was Nicolaus Copernicus.

Thus, the correct option is Copernicus.

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Answer:

The x - component of the normal force is equal to 1706.45 N.

Explanation:

To solve the problem, and since there is no additional information, we can safely assume that the x-axis is parallalel to the hill surface and the y-axis is perpendicular to the x-axis. Knowing that, we can calculate the components of the normal force (or weight for this case), using the following formulas:

[tex]N

x

=W∗Sin(α)=mg∗Sin(α)[/tex]

[tex]N

y

=W∗Cos(α)=mg∗Cos(α)[/tex]

Now, using the given information, we have:

[tex]mass=m=1150Kg[/tex]

[tex]a=8.70[/tex]

[tex]g=9.81 \frac{m}{ {s}^{2} } [/tex]

Calculating, we have:

[tex]N_{x}=mg*Sin(\alpha)[/tex]

[tex] \: \: \: \: \: \: \: \: \: N_{x}=1150Kg*9.81\frac{m}{s^{2}}*Sin(8.70\°)[/tex]

[tex]N

x =11281.5

s

2

Kg.m

∗Sin(8.70\°) = \\ \\ 1706.45

s

2

Kg.m

=1706.45.23N[/tex]

Hence, we have that the x-component of the normal force is equal to 1706.45 N.

Answer:

zero

Explanation:

fx=

Answer:

Double-replacement

Explanation:

2Li + CaCl2 → 2LiCl + Ca O

D. Double-replacement

A uniform magnetic field is perpendicular to the plane of a circular loop. The rate must the magnitude of change to induce a 10 A current in the loop.

The magnetic field which doesn't change with respect to time is called the uniform magnetic field.

The resistance of the loop is related to the length of the wire as

R=ρ L/ A

Diameter of wire is 10 cm formed from wire of diameter 2.5 mm and resistivity is 1.69×10⁻⁸ Ω⋅m.

Substituting the values into the above equation, we get

R ​ = {(1.69×10−8Ω⋅m) × π(0.10m)} / {π(2.5×10−3m)2/4}

R ​ =1.1×10−3Ω

Current is related to emf as

i=∣ε∣/R

=∣dΦB​/dt∣ / R

=(πl2/R) ∣ dB/dt ∣.

Substituting the given values from the question, we have rate of change of magnetic field

∣dB / dt∣​ = πr2iR​

∣dB / dt∣​ = π(0.05m)2(10A)(1.1×10−3Ω)

∣dB / dt∣​ ​ =1.4T/s

Therefore, the rate must the magnitude of change to induce a 10 A current in the loop is 1.4T/s.

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The total energy available during the collision of the two protons is determined as 900,938 MeV.

Based on the principle of conservation of energy, the total energy of the two protons during the collision will be conserved.

Available energy = Er + K

Where;

Available energy = 938 MeV + 900 GeV

Available energy = 938 Mev + 900 x 10³ MeV

Available energy = 938 MeV + 900,000 MeV

Available energy = 900,938 MeV

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If air resistance is ignored, the ball could land on the green after a flight time of 3.5s.

The vertical velocity of the ball is calculated as follows;

[tex]h = v_yt - \frac{1}{2} gt^2\\\\7.5 = (3.5)v_y - \frac{1}{2}(9.8)(3.5)^2\\\\ 7.5 = 3.5v_y - 60.025\\\\3.5v_y = 67.525\\\\v_y = 19.29 \ m/s[/tex]

X = Vxt

Vx = (X)/t

Vx = (70)/3.5

Vx = 20 m/s

v = √(Vy² + Vx²)

v = √(19.29² + 20²)

v = 27.79 m/s

tanθ = (Vy)/(Vx)

tanθ = (19.29)/(20)

tanθ = 0.9645

θ = 43.96⁰

The time of flight is calculated as follows;

[tex]T = \frac{2u \times sin(\theta)}{g} \\\\T = \frac{2 \times 27.79 \times sin(43.96)}{9.8} \\\\T = 3.9 \ s[/tex]

X = VxT

X = 20 x 3.9

X = 78 m

The ball will land on green which is at 70 m after 3.5s.

Thus, if air resistance is ignored, the ball could land on the green after a flight time of 3.5s.

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Answer:

the first one looks like a spiral galixy

the 2nd one looks like a lenticular galixy ?? (im pretty sure but not 100%)

the 3rd one looks like a elliptical galixy

Explanation:

Answer:

1. Spiral

2. Not sure but i think its irregular.

3. Elliptical

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When the outward-directed gas pressure (created by thermal nuclear energy) is balanced in a stable relationship with inward-directed gravitational force results in main sequence star.

The pressure is the force exerted per unit area.

A main sequence star fuses hydrogen in its core and has balanced outward pressure from core nuclear fusion and gravitational forces will be pushing inward.

When the outward-directed gas pressure is balanced in a stable relationship with inward-directed gravitational force results in main sequence star.

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Answer:

no

actually no one weres the scarf in sunny ʕ•ε•ʔ

Explanation:

The colours we see are the wavelengths that are reflected or transmitted. For example, a red shirt looks red because the dye molecules in the fabric have absorbed the wavelengths of light from

Answer:

3 benefits of a restrict afterwards a practice Brings essence rate back off and slows respiring Muscles return back to optimum motionless distance Prevents ancestry from combining in lower limits Cool down stretches are used to weaken courage rate and respiring rates afterwards exercise. It can help cause your soul rate back off to situated rate.

Explanation:

Answer:

Assess the situation quickly and calmly. Safety: check whether you or the casualty are in any danger. ...

Protect yourself and them from any danger. ...

Prevent infection between you and them. ...

Comfort and reassure. ...

Assess the casualty and give first aid treatment. ...

Arrange for help if needed

Explanation:

Answer:

.737 v

Explanation:

Since they are in series....they all have the same current running through them.....find the total resistance to calculate the current:

R = 67 + 83 + 433 + 309 = 892 ohm

V/R = current = 7.92 / 892 = 8.87 mAmps

Now the voltage across ecah resistor is   I R

 for the second one   8.87 ma * 83 ohm = V = .737 V

Why is the moon’s force of gravity less than that of the earth?

Since the moon has a smaller mass than the earth, the moon has less gravity than the earth. Gravity is related to mass.

Larger mass = larger gravity

Smaller mass = lesser gravity

Moon has small mass, therefore less gravity.

Dalton's atomic theory is related to the characteristics of atom. The statement describes one of the main principles of Dalton's atomic theory is atoms of same element are identical.

The Dalton's theory states that All matter is composed of extremely small particles called atoms and Atoms of a given element are identical in size, mass, and other properties. Atoms of different element are different.

Hence, the statement describes one of the main principles of Dalton's atomic theory is atoms of same element are identical.

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Answer

0.163 kg

Explanation:

[tex]\sf Kinetic \ Energy = \dfrac{1}{2} \ x \ mass \ x \ velocity^2[/tex]

Here we are provided with:

1) Kinetic Energy = 4.32 x 10 Joules ≈ 43.2 Joules

2) Speed/Velocity = 23 m/s

Now, solve for mass:

[tex]\rightarrow \sf \dfrac{1}{2} \ x \ mass \ x \ velocity^2 = Kinetic \ Energy[/tex]

[tex]\rightarrow \sf \dfrac{1}{2} \ x \ mass \ x \ (23)^2 =43.2[/tex]

[tex]\rightarrow \sf mass= \dfrac{43.2 (2)}{23^2}[/tex]

[tex]\rightarrow \sf mass= 0.163 \ kg[/tex]