revise and repeat: run a similar experiment with seeds B and C. Do seeds B and C need light to germinate? Describe your findings.

(Earth Science.)

Answer:

0 m/s²

Explanation:

Since each skater pushes the other with a force of 70 N, according to Newton's third law, there is an equal reaction and thus the other pushes back with a force of 70 N in the other direction, so we have forces of +70N and -70 N respectively. So, the net force on each skateboarder is F = + 70 N + (-70 N) = + 70 N - 70 N = 0 N.

Since force, F = ma where a = acceleration and m = mass,

a = F/m.

So, since for each skater, F = 0N,

a = 0 N/m

= 0 m/s²

So, the acceleration of each skater is 0 m/s²

Answer:

The nervous and endocrine systems exert the ultimate control over homeostasis because they coordinate the functions of the body's systems.

Explanation:

The supplied tuning fork has a frequency of 262Hz.

A recurring event's frequency is measured by how many times it occurs in a unit of time. To emphasize distinctions with spatial and angular frequencies, respectively, it is also sometimes referred to as ordinary frequency or temporal frequency.

Additionally, it is claimed that when it is played on a mandolin, four beats can be heard every second.

Together, the beats produced by a vibrating mandolin string and tuning fork are referred to as beat frequencies.

Frequency of beat= Frequency of tuning fork + Frequency of mandolin string

Given that a tuning fork's frequency is 262 Hz

String frequency equals 4 beats per second (4Hz).

Therefore, Frequency of beat = 262Hz +4 Hz = 266Hz

Hence, the correct answer for the given question is option (D) 266Hz

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Yes, because B=0 inside the tube so, B is non-zero outside the tubes.

A surface or solid of revolution exhibits circular symmetry around an axis in three dimensions. This property is also known as cylindrical symmetry or axial symmetry.

Apply Ampere's law to the circle in the image with the number 1 on it. The magnetic field inside the tube must be zero because the current has a cylindrical symmetry about its central axis, which causes the line integral to reduce to the magnetic field's strength times the path's circumference.

However, this is equal to zero because there is no current flowing along this path. On the other hand, if the conductor's current is the current flowing through channel 2, the line integral will not equal zero, indicating that there is a magnetic field outside the tube.

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Answer:

The gravitational force between two objects = F = 9.3 x 10⁻⁶ N        

Explanation:

Given

m₁ = 70 kg

m₂ = 2000 kg

distance r = 1 m

Thus, the gravitational force between two objects = F = Gm₁m₂ / r²

as

Gravitation constant = G = 6.67430×10⁻¹¹ N⋅m²/kg²  

Thus, putting the values

F = Gm₁m₂ / r²

  = (6.67430×10⁻¹¹ × 70 × 2000) / 1²

   = 9.3 x 10⁻⁶ N

Thus, the gravitational force between two objects = F = 9.3 x 10⁻⁶ N                                            

Explanation:

P=W/t

P=500/20

P=25 W

Answer:

b. has landforms made by flowing liquid water

- has many huge on its surface

- gets its red color from iron oxide present in soil and rocks on surface

- reflects light from sun

Explanation:

Answer: I think its C

Explanation:

Answer:

a rolling bowling ball

Explanation:

a rock at the edge of a cliff, an archer’s bow that is drawn back, a rolling bowling ball, a car waiting at a red light

moving is kinetic energy a rolling bowling ball is the only one with movement

Answer: I don’t know the answer to this but just do what i do look up the question I’m sure someone has answered this hope it helps❤️

Explanation:

Answer:

Explanation:

A. The kinetic energy is the same as the initial potential energy:

  PE = mgh = (215 N)(2.0 M) = 430 J

__

B. The velocity achieved by falling from a height h is given by ...

  v = √(2gh)

  v =  √(2·9.8 m/s^2·2 m) = √(39.2 m^2/s^2)

  v ≈ 6.26 m/s

All BUT ONE statement provides evidence supporting plate tectonics, through data collected at the sites of sea floor spreading. That is... paleomagnetic reversals in specific areas of the sea floor.

Paleomagnetism, often known as palaeomagnetism, is indeed the study of magnetic field records found in rocks, silt, and other prehistoric materials. When magnetic minerals occur in rocks, they may record the strength and direction of the magnetic field.

Hence, paleomagnetic reversals in specific areas of the sea floor, Paleomagnetism is related to mid-ocean ridges since it is among the most trustworthy techniques for scientists to make a magnetic history of the evolution of the Earth's magnetic field. New rock is continuously formed at an ocean's bottom rift as a result of seafloor spreading.

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Answer:

c is the correct answer

Explanation:

A Rube Goldberg Machine is “a comically involved, complicated invention, laboriously contrived to preform a simple operation.” 2. What are the 6 Simple Machines? A. The 6 Simple Machines are: wedge, screw, lever, wheel and axel, inclined plane and pulley

Answer: it’s actually A

Explanation:

Anything sharp like a knife, is a wedge so the hook thingy is a wedge

The frequency of the ground motion is 0.2 Hz

The frequency of the ground motion f = 1/T where T = period of ground motion.

Now,  the pond is 9.15 m long and assume it has a uniform width and depth. You measure that a pulse produced at one end reaches the other end in 2.50s.

Since this is a standing wave with antinodes at each end of the pond and one node at the center, we have that the distance between two antinodes is half the wavelength.

Also, the time between two antinodes is half the period.

So, t = T/2

Now, since a pulse produced at one end reaches the other end in 2.50s, this is the time between both antinodes.

So, the period, T = 2t where t = time between antinodes = 2.50 s

So, T = 2t

= 2 × 2.50 s

= 5.0 s

Since the frequency of the ground motion f = 1/T substituting the value of T into f,we have

f = 1/T

= 1/5.0 s

= 0.2 Hz

So, the frequency of the ground motion is 0.2 Hz

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The distance of a car that starts from rest and accelerates at 4 m/s² until it reaches 36 m/s is 162m.

The distance moved by a body can be calculated using the following formula:

S = ut + ½at²

Where;

However, the time taken for the car to complete the acceleration can be calculated as follows:

4 = 36/t

t = 9seconds

S = 0 × t + ½ × 4 × 9²

S = 0 + 162

S = 162m

Therefore, the distance of a car that starts from rest and accelerates at 4 m/s² until it reaches 36 m/s is 162m.

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The type of profession that does not need a college education is personal trainer.

Personal trainer is the type of profession that does not need a college education because the personal trainer is not related to any educational subject. This profession can be learned from a trainer not from the teacher in the school or college. Personal trainer is responsible for maintaining the strengths and remove the weaknesses through creating workout plans. It provides physical and mental guidance and also monitor progress of their customer on a regular basis..

So we can conclude that the type of profession that does not need a college education is personal trainer.

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Answer:

Mass and Its stage of life

Explanation:

All stars are born with the same basic composition, yet stars can look quite different from one another. Its mass and its stage of life.

Answer:

A.......................

Answer:

the answer you're looking for is A

By angular speed, the frequency is 2.39 Hz.

We need to know about the angular speed of harmonic oscillation. the angular speed can be determined as

ω² = k / m

where ω is angular speed, k is spring constant,  and m is the mass.

The angular speed can be calculated by

ω = 2πf

Hence,

ω² = k / m

(2πf)² = k / m

k = (2πf)² / m

where f is frequency.

From the question above, we know that:

m1 = 0.6 kg

f1 = 3 Hz

m2 = 0.38 kg

The spring is same, hence the spring constant is the same

k1 = k2

(2πf1)² / m1 = (2πf2)² / m2

f1² / m1 = f2² / m2

3² / 0.6 = f2² / 0.38

f2² = 5.7

f2 = 2.39 Hz

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The electric field at the surface of the cylinder is 51428V/m

Given data:

• The length of the charge is l=  7m.

• The charge is q = 2μC..

• The radius the cylinder is r = 10 cm

Since the filament length is so large as compared to the cylinder length that the infinite line of charge can be assumed.

The expression to calculate the electric field is given as,

E=2kλ/r

Here, λ is the linear charge density.

Substitute the values in the above equation,

E = (2×9×109N⋅m^2/C^2×2×10^−6C)/0.1m×7m

E = 51428N/C×(V/m)/(N/C)

=51428V/m

An electric charge is the property of matter where it has more or fewer electrons than protons in its atoms. Electrons carry a negative charge and protons carry a positive charge. Matter is positively charged if it contains more protons than electrons, and negatively charged if it contains more electrons than protons.

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Answer:

Yellow dwarfs are small, main sequence stars. The Sun is a yellow dwarf. A red dwarf is a small, cool, very faint, main sequence star whose surface temperature is under about 4,000 K. Red dwarfs are the most common type of star. Proxima Centauri is a red dwarf.

Explanation:

Answer:

Red dwarfs are low-mass main-sequence stars. Yellow dwarfs are main-sequence (dwarf) stars with masses comparable to that of the Sun.

Explanation:

Answer:

(B). a forward thrust from the propeller that is equal to the backward force of the water current.

Explanation:

A boat generates thrust when the propellers are turned to accelerate water forward. According to Newton's third law, the resulting thrust pushes the boat in the opposite direction (i.e. backward direction) which is equal in magnitude.

So, the boat moves forward due to a forward thrust from the propeller that is equal to the backward force of the water current.

Hence. option (B) is correct.

Answer:

Cold temps. . .

Explanation:

Hope it helps!

"Consciousness is everything.  Consciousness and "conscious" are catch-all terms that refer to a wide range of mental events. Both have a variety of connotations, and the word "conscious" is used to describe both specific mental states and processes (state consciousness) as well as entire creatures (creature consciousness).

Your distinctive awareness of your own thoughts, memories, emotions, sensations, and surrounds is what is known as consciousness. Being aware of oneself and one's surroundings is the essence of consciousness.

This awareness is personal to you and subjective. It is a sign that something is a part of your consciousness if you can verbalize what you are experiencing.

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Answer:

never....(D)

Explanation:

hope this helps, the person above me is also correct

Covalent compounds never conduct electricity as we know that these compounds are formed by the sharing of electrons where free electrons are unavailable for the flow of the electric current.

Therefore the correct answer is option D.

Covalent bonds are formed between two atoms, whether they are similar or different when they share an extra electron.

The transport of electrons produces the ionic bond.

Intermolecular compounds are known to never carry electricity because they are created by shared electrons, which prevents free electrons from being available for the transmission of an electric current.

Option D is the right response as a result.

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When vector A is oriented in the same direction as vector B, the resultant's greatest magnitude is A + B = 12 + 8 = 20 units. When vector A is oriented in the direction opposite to vector B, the resultant vector has its least magnitude, A - B = 12 - 8 = 4 units.

A vector that produces the aggregate impact of all other vectors is known as a resultant vector. The resultant vector is what we get when we combine two or more vectors. The head-to-tail convention, which is defined as "joining the tail of the first vector with the head of the second vector to give another vector whose head is joined with the head of the second vector and tail of the first vector," can be used to geometrically add vectors by drawing them on a common scale.

Any number of vectors can be added by extending the procedures for obtaining a vector's resultant or adding more than two vectors.

R=A+B+C---

Assume there are three vectors: A, B, and C. These vectors must be drawn in accordance with the head-to-tail rule so that the heads of each vector line up. As a result, the resultant vector is as follows:

R=A+B+C

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Answer:

Dry lubricants or solid lubricants are materials that, despite being in the solid phase, are able to reduce friction between two surfaces sliding against each other without the need for a liquid oil medium.

Explanation:

Answer:

Your answer is graphite :) Have a nice day

Explanation:

Answer:

1)force:- force is an external affert by any body on an object.

2) force and motion are related to each other. force helps to create motion in any object.

3) frictional force

4) Newton

Answer:a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.

Hope This helps!!

Answer:

the answer is b

Explanation:

Answer:

C. Do not write anything next to it.

Explanation:

If an equation is already balanced there is no need to provide information of that.