An object is thrown upwards with a speed of 16 m/s. How long does it take it to reach a height of 7. 0 m on the way up? neglect air resistance.

Answer: D all of the above

Can I get brainliest since I answered first

Answer:

32

Explanation:

Answer:

a = (v2 - v1) / t

For constant acceleration (positive) v2 (final velocity) must be greater than v1 (initial velocity)

Note that velocity is a vector quantity in this equation

For instance in the case of a freely falling body one might have v1 as 9.8 m/s and v2 as 29.4 m/s in 3 sec giving

a = (-29.4 - (-9.8)) / 3 = -19.6 m/s^2 where the positive direction was chosen as upwards and the acceleration is negative or downwards

Answer:

✓ Ion

Explanation:

Which term BEST describes the form of beryllium shown? Protons=4 Neutrons=5 Electrons=2

✓ Ion

\(\\ \rm\Rrightarrow Work\:done=Force(Distance)\)

\(\\ \rm\Rrightarrow Work\:done=20(20)=400J\)

Option D

The change in the potential energy of the ball is equal to 0J. Therefore, option (A) is correct.

Work can be described as the energy used when a force is exerted to move an object through a specific displacement. The work done can be defined as it depends upon both the force on the object and the displacement by the object.

The displacement in a straight line in the direction of the applied force over a distance 'd'.

W= F × d

Where 'F' is the exerted force and 'd' is the displacement by the object.

The change in the potential energy or kinetic energy is equal to the work done.

The change in the potential energy  = mgh₂ - mgh₁

The ball roll over the surface, h₂ = h₁

Therefore, the change in the potential energy is equal to zero.

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Approximately, 37,481.5 Newtons of force was applied to the truck.

A force is a push or pull on an object with mass causes it to change its velocity. Force is an external agent capable of changing a body's state of rest or motion. It has a magnitude and a direction, so it is a vector quantity.

Mathematically, Force = mass x acceleration

but \(a=\frac{v-u}{t}\)

so, \(F = m\frac{v-u}{t}\)

\(F = 6900\frac{47-3}{8.1}\)

F = 6900(5.4)

F = 37,481.5N

In conclusion, the force applied to the freight truck was 37,481.5N.

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Answer: The charges must be like charges (both positive or both negative).

Explanation:

True, a carrier wave is an electromagnetic wave that can be modulated in frequency, amplitude, or phase to transmit speech, music, images, or other signals.

Electromagnetic waves are invisible forms of energy that travel though the universe. However, you can "see" some of the results of this energy. The light that our eyes can see is actually part of the electromagnetic spectrum.

This modulation allows the carrier wave to carry information and transmit it over long distances.

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Answer:

multiply that and divided by 45

Answer:

4.444444444 km

Explanation:

200/45=4.444444444

The bus travels 4.444444444 kilometers in a minute

Objects with charge: Electric and Magnetic fields, Objects with iron or steel: Magnetic field.  and Objects with mass: Gravitational field.

Electric fields are associated with objects that have an electric charge. Any object that has a charge, whether it is positive or negative, will create an electric field around it. This field can interact with other charged objects and cause a force between them.

Magnetic fields are associated with objects that have magnetic properties, such as iron or steel. These materials have tiny magnetic domains that can align in the presence of an external magnetic field, creating a net magnetic field. This magnetic field can interact with other magnetic objects and cause a force between them.

Gravitational fields are associated with objects that have mass. Any object that has mass, whether it is large or small, will create a gravitational field around it. This field can interact with other massive objects and cause a force between them. The strength of the gravitational field is proportional to the mass of the object creating the field.

Therefore, Charged objects exhibit electric and magnetic fields, whereas steel or iron objects exhibit a magnetic field.  and the gravitational field for mass-bearing objects.

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Answer:

See below

Explanation:

Ignoring air friction...X will be moving the same speed as Y

vf = at

  = 9.81 m/s^2 * 1 s = 9.81 m/s

✔ First calculating the speed :

V = d(in m)/t(in s)

✔ You now know the average car's speed, is time it takes to stop it completely, so you can calculate its acceleration :

a = V/t

The number of bright stars in a nearby cluster can also be determined from a single photograph by analyzing the cluster's luminosity function.

It is impossible to measure the rate at which a variable star brightens and dims from a single photograph. The rate at which a variable star brightens and dims cannot be measured from a single photograph. A variable star is a star that changes brightness over time, and their light curves are often used to study them. Light curves are plots of brightness over time, and they are used to study the properties of variable stars.

It is difficult to measure the rate at which a variable star brightens and dims from a single photograph because it is necessary to observe the star over a long period to obtain a complete light curve. Variable stars can be used to study a variety of phenomena in astronomy, including the evolution of stars, the structure of galaxies, and the expansion of the universe. The brightness of a star in our sky can be measured from a single photograph by measuring its apparent magnitude.

The apparent magnitude of a star is a measure of its brightness as seen from Earth. The general shape of an interstellar gas cloud can also be determined from a single photograph by analyzing its morphology. The color of a planet can also be determined from a single photograph by analyzing the wavelengths of light reflected by its atmosphere. Finally, the number of bright stars in a nearby cluster can also be determined from a single photograph by analyzing the cluster's luminosity function.

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Answer:

O scientific method

Explanation:

Answer:

The main difference between the two is - nuclear fusion results in fusing many smaller atoms into one, while in nuclear fission, the atom splits into two or more smaller ones.

Explanation:

Firstly, "fusion" generally means combining many things to one, while "fission" refers to breaking down one thing into different components. Also, nuclear fission is not common in nature, while nuclear fusion does (like in stars, for example).

Answer:

90.0

Explanation:

Because 78.8329 + 3.179=83.0119

83.0119 + 6.5263=89.5382 rounded up is 90.0000

Hope this helps have a awsome afternoon:)

Gọi là máy quang phổ kế

That's a diffraction grating.

Root mean square speed of the carbon atom near the surface of sun is 32233.52 m/sec.

Root mean square speed  is defined as the  the square root of the average of the square of the velocity and given as \(\sqrt{3}\)RT/M

Where R =8.3145J/mol.k

M molar mass of the molecule in kg/mol

Carbon atom has the element number as 6 and has a molecular mass of 12 au. molar mass of the molecule can be given as:

Carbon = C = 12g/mol =  0.012kg/mol

T= Temperature = 6000K

Vrms =  \(\sqrt{3}\)RT/M

Vrms = ( \(\sqrt{3 * 8.315 * 6000}\) ) / 0.012

Vrms = 32233.52 m/sec

The rms speed of carbon atoms near the surface of the sun at a temperature of about 6000 k is 32233.52 m/sec.

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Answer:

friction

air drag

every thing that opposes the motion affects kinetic energy

Explanation:

kinetic energy is a energy which is increase with increase in motion and potential energy is energy stored while the object is at rest

potential energy ∝ 1/(kinetic energy)

as kinetic energy increases potential energy decreases

The magnetic field strength is 10.4 mT.

The maximum force per unit length that could be achieved by reorienting the wire in this field is 0.187 N/m

F = BILsinθ

where:

B = magnetic field strength

I = current

L = length of wire

θ = angle between the wire and magnetic field

Substituting the given values, we get:

0.35 N/m = B x 18 A x L x sin(24°)

Since we are asked to find the magnetic field strength, we can rearrange the equation as follows:

B = 0.35 N/m / (18 A x L x sin(24°))

We don't have the value of L, but we can assume it to be 1 meter since it doesn't affect the magnetic field strength. Substituting this value and solving for B, we get:

B = 0.35 N/m / (18 A x 1 m x sin(24°))

B = 10.4 mT (rounded to two significant figures)

Therefore, the magnetic field strength is 10.4 mT.

F = BILsin90°

F = BIL

Substituting the given values, we get:

F = 10.4 mT x 18 A x 1 m

F = 187.2 μN/m

Converting this to newtons per meter, we get:

F = 187.2 μN/m x 10^-6 N/μN

F = 0.187 N/m (rounded to two significant figures)

Therefore, the maximum force per unit length that could be achieved by reorienting the wire in this field is 0.187 N/m.

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Answer:

ok so

Explanation:

1.) 1 hour

2.) 14 years old

3.)

24 years old

4.) you are

Answer:

22

Explanation:

becuase is you do 10kg times 2.2= 22m/s

Object B has a mass of 10 kg and is moving at a velocity of 2.2 m/s. So object B’s momentum is 22 kg.

The momentum of an object is given with the aid of the made from its mass and the rate. this may be understood genuinely with the help of an instance. A Cricket ball is heavier than a tennis ball. If each of the balls is thrown at the same speed. Greater pressure is required to forestall the cricket ball.

Momentum is the amount of movement and is compounded by using the quantity of the problem moved and the velocity with which it moves. The item has a tendency to be in movement and therefore is a vector amount. it's far determined by using the made from the mass of the object and its velocity.

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Answer:

El avión recorrió 45 km en los 180 s.

Explanation:

La relación entre velocidad, distancia y tiempo se da de la siguiente manera;

\(Velocidad= \dfrac{Distancia}{Hora}\)

Por lo cual los parámetros dados son los siguientes;

Velocidad = 900 km/h = 250 m / s

Tiempo = 180 s

Estamos obligados a calcular la distancia recorrida

De la ecuación para la velocidad dada arriba, tenemos;

Distancia recorrida = Velocidad pf viaje × Tiempo de viaje

Distancia recorrida = 900 km/h × 180 s = 900

Distancia recorrida = 900 km/h × 1 h/60 min × 1 min/60 s × 180 s = 45 km

Por lo tanto, el avión viajó 45 km en 180 s.

Answer:

it is c

Explanation:

a.p.e.x

i took the test

We have that these are some reasons why the light bulb isn't lighting up in a circuit

Generally, there are a series of reason why light bulbs may not light up i n a circuit system.

The power requirements to light up the bulb; not energy change can light up a bulb.

As well as poor connection ,the connections might be out at a node thereby removing power from the source.

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Answer:

6 newtons

Explanation:

If it's an equal force exerted on the student's hands, the object will not move.

If a student pushes on an object with a force of 6 newtons and the object does not move then the force exerted by the object on the student’s hands would be 6 Newtons because the applied force is equal to the static frictional force until the object does not move.

Friction is a type of force that resists or prevents the relative motion of two physical objects when their surfaces come in contact

As given in the problem If a student pushes on an object with a force of 6 newtons and the object does not move then we have to find out the force exerted by the object on the student’s hands,

Force applied by the student of the object = 6 Newtons

The force exerted by the object on the student's hand = 6 Newtons

Thus, the force exerted by the object on the student’s hands would be 6 Newtons

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As the waves approach the shore, they slow down, the height of the waves increases and the wavelength decreases.

The ocean floor provides resistance to the waves' troughs as they go closer to the coast. The wave is slowed down by the friction it creates with the ocean floor. The wavelength of the waves is shortened by this friction. The crests rise higher and the troughs deepen as the wavelength shortens.

Friction at the wave's point of contact with the bottom slows it down. The wavelength is reduced as one wave slows down and is caught up to by another. The wave height increases even when the wavelength shrinks because the wave's energy remains constant.

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Part 1. a)5m, b)6mi + 3mj + 2mk , c)(3/7)i - (2/7)j + (6/7)k , part 2. a)25i + 31j + 7k cm, with magnitude 42 cm and b) Unit vector in direction of resultant displacement is (5/14)i + (31/70)j + (3/10)k.

1a) Using Pythagoras theorem, the magnitude of vector A will be found, The magnitude of A is equal to the square root of (4 + 3), which equals 5, and the sides of the right triangle in this circumstance are 4 and 3.

1b) We may simply add the components of the vectors 2A, B, and -C to determine their sum. In the x and y directions, B has components of 2 and -3, respectively. The three vectors' sum is therefore (8 + 2 - 2) mi + (6 - 3 - 3) mj + (-2) mk, which may be written as 6mi + 0mj + 2mk.

1c) We can rearrange the preceding equation 2C + B R = 0 to isolate R and determine the unit vector in the direction of R. R = 2C + B, and for the unit vector multiplying both sides by the magnitude of 2C + B.

2a) We can easily add the respective components of the three supplied displacements to determine the components of the resultant displacement. 15 + 23 - 13 = 25, 30 - 14 + 15 = 31, and 12 - 5 + 0 = 7 are the x, y, and z components, respectively. Using the Pythagorean theorem, we can calculate the size of the resulting displacement, which equals sqrt(25 2 + 31 2 + 7 2) = 42 cm.

2b) We can divide the resultant displacement vector by its magnitude to determine the unit vector in the direction of the resulting displacement. The result of dividing each part of the displacement by 42 is (25/42)i + (31/42)j + (7/42)k.

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Answer:

di ko po alam ang sagot baka

po pang grade 9 po yan

Explanation:

sana po magets nyo po