I need help with the 1st and the 3rd one plzzzzzzzzzzzzz

Answer:

1-physical properties, and chemical properties.

2-The physical properties of matter are those characteristics that can be measured without altering the atomic structure, while the chemical properties of matter are those.

3-For the change of state to occur, the temperature must be constant. The melting point is an intensive physical property of matter; this means that it is not linked to the amount of substance or the size of the body.

The person in charge of information management is the database administrator.

The term database refers to the arranging of the data that concerns clients in relevant entry point such as computers and file cabinets. This is the way by which companies are bale to keep track of their customers.

The person that is most helpful in the management of the tens of thousands of customer addresses in three different computer systems and written on paper in filing cabinets is the database administrator.

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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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Answer:

the answer is b

Explanation:

Answer:

Animals cerate Carbon Dioxide through the process of respiration.

All animals exhale carbon dioxide out through respiration and increase the level of carbon dioxide in the atmosphere and this is intaken by the plants for photosynthesis.

Carbon cycle is the geological  process that balance the amount of carbon dioxide in the atmosphere and biosphere. Carbon dioxide is an essential gas that maintains the living condition on earth.

All animals inhales oxygen and exhales carbon dioxide out. This carbon dioxide is used by plants to carry photosynthesis in plants. Plants absorb this carbon dioxide and combine with water forming oxygen gas and glucose.

This process repeats cyclically and the level of oxygen and carbon in the atmosphere gets balanced. Therefore, animals have a significant role in carbon dioxide cycle and oxygen cycle.

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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:

a = 0.41 [m/s²]

Explanation:

To solve this problem we must use Newton's second law which tells us that the sum of forces on a body is equal to the product of mass by acceleration.

∑F = m*a

where:

F = force [N]

m = mass = 87 [kg]

a = acceleration [m/s²]

The frictional force will be taken as negative, since it opposes the movement of the block.

[tex]43-7.3 = 87*a\\35.7 = 87*a\\a=0.41[m/s^{2} ][/tex]

Answer:

0.675 kg m/s

Explanation:

Momentum = mass x velocity

= 0.015 x 45 = 0.675 kg m/s

P.S. I'm not sure of this answer,  so it might be a good idea to check this with some other sources.

Change in momentum  = 0.675 kg m/s

Momentum  is a  property of a moving body that the body has by virtue of its mass and motion and that is equal to the product of the body's mass and velocity

change in momentum = final momentum - initial momentum

final momentum  = m*v = 0.015 *  45 = 0.675 kg m/s

initial momentum = m* v = 0.015 * 0 = 0

change in momentum  = 0.675 kg m/s

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Answer:second law

Acceleration of an object depends on the mass of the object and the amount of force applied

Explanation:

fall at a faster velocity than what it was thrown! Hope this helps!

Answer:

i think its unbalance because one side has 25 newtons and the other is 20 newtons there not the same

Answer:

the action or process of moving or being moved.

Explanation:

In physics, motion is the phenomenon in which an object changes its position over time. Motion is mathematically described in terms of displacement, distance, velocity, acceleration, speed, and time.

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

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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Answer:

15m/s²

Explanation:

According to Newton's second law;

Force = mass * acceleration

Given

Force = 1.5N

mass = 0.10kg

Required

acceleration

Substitute into the expression;

1.5 = 0.1a

a = 1.5/0.1

a = 15m/s²

Hence the acceleration that the puck move across the air table is 15m/s²

Answer:

B im pretty sure.

Explanation:

Answer:

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

Answer:

the answer you're looking for is A

The environment because maintaining a healthy environment is central to increasing quality of life and years of healthy life.

Explanation:

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:

F L = W * L/2    

F = W / 2 = 42.5 N

The crowbar is uniform and can be replaced by a point mass of 85 N at distance of L/2 and the applied force is at a distance of L

Answer:

fg

Explanation:

bbjtvnjj

The minimum energy required is 3.02 x 10²³ joule.

We need to know about relativistic energy to solve this problem. The rest energy of the object can be determined by

Eo = m₀ . c²

where Eo is rest energy, m₀ is rest mass and c is the speed of light (3 x 10⁸ m/s).

The total energy of object can be described as

E = Eo / √(1 - v²/c²)

where E is total energy, v is the object speed.

From the question above, we know that :

m₀ = 2.4 x 10⁶ kg

c = 3 x 10⁸ m/s

v = 0.7c

Find the rest energy

Eo = m₀ . c²

Eo = 2.4 x 10⁶ . (3 x 10⁸)²

Eo = 2.16 x 10²³ joule

Determine the total energy

E = Eo / √(1 - v²/c²)

E = 2.16 x 10²³ / √(1 - (0.7c)²/c²)

E = 2.16 x 10²³ / 0.71

E = 3.02 x 10²³ joule

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At extreme position, velocity is zero but acceleration is maximum in Simple Harmonic motion because of maximum displacement of pendulum.

At extreme position, velocity is zero but acceleration is maximum in Simple Harmonic motion because at extreme points the motion of the pendulum is at zero which means that velocity is zero but the pendulum attains maximum displacement. Acceleration is maximum when it gets the extreme position because the displacement is maximum at extreme position. If the velocity of the simple harmonic motion is maximum, the acceleration must be equal to zero and we know that the acceleration is equal to zero only when the particle or object is at initial position.

So we can conclude that at extreme position, velocity is zero but acceleration is maximum in Simple Harmonic motion because of maximum displacement of pendulum.

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Answer:

t=v/a

Explanation:

Acceleration is defined as the rate of change of velocity with time. It is mathematically expressed as;

  Acceleration  = [tex]\frac{Final velocity - Initial velocity}{time}[/tex]  

The change in velocity per unit of time is the acceleration

 From this equation;

      time  = [tex]\frac{change in velocity }{acceleration}[/tex]  

This expression is analogous to the expression chosen.

Answer:

From the given options, the option (D) is correct. Because Al is the aluminium which is located in period 3 of the periodic table.

Explanation:

We know that the 3rd period contains 8 elements which are as follows:

The sodium and magnesium, the first 2 elements, are members of the s-block of the periodic table, while the rest of the members are the elements of the p-block.

Thus, from the given options, the option (D) is correct. Because Al is the aluminium which is located in period 3 of the periodic table.

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:

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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