Based on the free-body diagram, the net force acting
on this firework is

i’m pretty sure the answer is B

Answer:

b

Explanation:

Answer:

9090 m, 104 s

Explanation:

After the acceleration phase, the rocket reaches a height of:

x = x₀ + v₀ t + ½ at²

x = (0 m) + (0 m/s) (30 s) + ½ (10 m/s²) (30 s)²

x = 4500 m

And it reaches a velocity of:

v = at + v₀

v = (10 m/s²) (30 s) + (0 m/s)

v = 300 m/s

After the fuel runs out, the rocket goes into free fall.  The maximum height reached is:

v² = v₀² + 2a(x - x₀)

(0 m/s)² = (300 m/s)² + 2(-9.8 m/s²)(x - 4500 m)

x ≈ 9090 m

The time to reach maximum height during free fall:

v = at + v₀

0 m/s = (-9.8 m/s²) t + (300 m/s)

t ≈ 30.6 s

And the time to land from the maximum height:

x = x₀ + v₀ t + ½ at²

0 m = (9090 m) + (0 m/s) t + ½ (-9.8 m/s²) t²

t ≈ 43.1 s

So the total time is:

t = 30 s + 30.6 s + 43.1 s

t ≈ 104 seconds

The answer is 31.67 Amps.

To solve the problem, we need to use Ohm's Law equation, which states that:

[tex]V=IR[/tex]

Where,

V, is the voltage (in volts)

I, is the current (in Amps)

R, is the resistance (in Ohms)

We are given the following information:

[tex]Voltage=190v\\Resistance=6\Omega\\[/tex]

So, using Ohm's Law equation and substituting the given information, we have:

[tex]V=IR\\\\190v=I*6\Omega\\\\I=\frac{190v}{6\Omega}=31.67Amps[/tex]

Hence, we have that the current used by the blender is 31.67Amps.

Have a nice day!

Answer:

-3 because its closer to 0

Explanation:

Answer:

-3

Explanation:

Because -3 is closer to 0 the closer you are to 0 in negative numbers the higher the number is

False. Receiving home care services does not necessarily mean that a patient has a terminal illness.

Terminal illness and homecare services

Home care services are not exclusively for those with terminal illnesses; they cater to various needs.

These services extend beyond end-of-life care, encompassing chronic illness management, post-surgery recovery, palliative care, and support for the elderly.

Home care facilitates personalized healthcare delivery in the comfort of one's residence, promoting independence and enhancing the quality of life.

It is a flexible approach that addresses diverse medical conditions, allowing individuals to receive necessary assistance tailored to their unique health requirements.

Home care services do not exclusively mean a patient has a terminal illness. Home care can include hospice services for those with terminal illnesses, but it also caters to a range of other patient needs, such as recovery and long-term support. Hospice care provides comfort for terminally ill patients, often in their homes. The statement in the question is not true.

If a patient is receiving home care services, it does not necessarily mean they have a terminal illness. While it is true that hospice care is often associated with terminal illnesses and focuses on providing comfort and support rather than cure-oriented treatments, home care can encompass a variety of services for patients with varying needs, including recoveries from surgeries, chronic illnesses, disability support, and more community-based, long-term care. Hospice care, specifically, supports terminally ill patients and their families by offering pain management, emotional support, and the opportunity for the patient to be in the comfort of their own home. However, not all patients in home care are in hospice or have terminal illnesses.

Answer:

B. The image is right-left reversed and about as far away from the mirror as the reflected object.

Explanation:

A plane mirror is used in several ways in our life, from the mirror that we have on the bathroom to the mirrors we use on cars, the main difference is that the mirror reflects the image reversed on the Vertical axis, which means that the left is the right and the right is the left, a mirror also protrays objects at a certain distance, about as far away from the mirror as the reflected object but they are actually closer in real life.

Answer:

B. The image is right-left reversed and about as far away from the mirror as the reflected object.

Answer:

Amplitude and wavelength

Explanation:

- The amplitude of a wave is the maximum displacement of the wave, measured with respect to the equilibrium position (so, for a water wave it is the maximum height of the wave relative to the equilibrium position)

- The wavelength of a wave is the distance between two consecutive crests (or throughs) of a wave. So, for a water wave, it is the distance between two consecutive waves

Therefore, in the example in the problem we have:

- 2 meters corresponds to the amplitude

- 35 meters corresponds to the wavelength

the formation of a standing wave requires interferencethe incoming and reflected waves of the same frequency

Answer: The correct answer is "interference between the incoming and reflected waves of the same frequency"

Explanation:

Standing wave: Standing wave will form when two waves of equal frequency travelling in an opposite direction in the same medium.  There is interference between the incoming and reflected waves of the same frequency.

These waves do not appear to move. There is an oscillation up and down in same phase. Standing wave consists of node and antinode.

Anti node: It is the location in the wave where the amplitude is minimum.

Node: It is the location in the wave where the amplitude is maximum.

Therefore, the correct option is "interference between the incoming and reflected waves of the same frequency ".

scaler quantity has magnitude only for example mass ,speed,distance,electric current

Answer:

1.) Nebular cloud of gas and dust.

2.) Cloud collapses under the force of its own gravitational attraction; usually triggered by a supernova.

3.)Condensed material begins to combine and form a core center, as it warms, a  protostar is formed.

4.)Other gas and matter of the nebular cloud begin to rotate around the protostar, forming a flattened disk.

5.) Stellar core heats as it grows; nuclear fusion begins and a star is born.

6.) Nuclear energy runs out; death: possible supernova.

Hope this helped you out!

Answer:

0.86 m

Explanation:

We can solve the problem by using the law of conservation of energy.

The initial mechanical energy of the flower pot is just gravitational potential energy, given by:

[tex]E_i = U = mgh[/tex]

where

m = 2.50 kg is the mass of the pot

g = 9.8 m/s^2 is the acceleration due to gravity

h = 12.0 m is the height

When the pot hits and compresses the spring coming to a stop, all this energy is converted into elastic potential energy of the spring:

[tex]E_f = U = \frac{1}{2}kx^2[/tex]

where

k = 800 N/m is the spring constant

x is the compression of the spring

Due to the conservation of energy,

[tex]E_i = E_f[/tex]

So we can write

[tex]mgh=\frac{1}{2}kx^2\\x=\sqrt{\frac{2mgh}{k}}=\sqrt{\frac{2(2.50 kg)(9.8 m/s^2)(12.0 m)}{800 N/m}}=0.86 m[/tex]

Answer:

B. 54.4  m/s

Explanation:

Using the equation;

S = ut + 1/2at²

Where;

v is the final velocity

u is the initial velocity,

a is the acceleration,

s is the displacement

Therefore;

975 =(7.55×31.5) + (0.5×a× 31.5²)

975 = 237.825 + 496.125a

496.125a = 737.175

a = 1.486 m/s²

But;

v = u + at

  = 7.55 m/s + (1.486 × 31.5)

   = 54.355 m/s

   = 54.4 m/s

Therefore;

The final velocity is 54.4 m/s

B) Enriching the soil.

Hope this helps.

I believe the answer is B) enriching the soil. Bacteria converts energy in would organic matter into forms useful to the rest of the organization in the soil food web.

I know this question is old but it still needed an answer :-) hope this helps anyone who needs it!

C. is the right answer

When giving feedback to children, your message is most useful when . giving a clear message that matches your emotion.

Feedback occurs when a system's outputs were being used as inputs again as part of a cause-and-effect circuit or loop. Thus, the system is said to feed back on itself. When used with feedback systems, the concept of causality must be treated.  Simple causal reasoning about a feedback system is challenging because first system affects the second, which impacts the first, creating a circular argument. Because of this, it is difficult to reason utilizing cause and effect, and it is required to look at the problem as a whole.

A message is a brief item of communication that the source intended for a certain recipient or group of recipients to read. There are many other ways to deliver a signal, such as courier, telegraphy, carrier pigeon, and electronic bus. A broadcast's content might have been a message.

To learn more about message here

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Answer:

A positive charge with very small charge compared to the charge source of the field

Explanation:

Let's consider an electric field produced by a source charge Q.

In order to test the direction and magnitude of the electric field, we use a positive test charge q. The reason for chosing a positive charge is that a positive charge will move following the directions of the electric field lines (in fact, the positive charge will be repelled from charge Q if charge Q is positive, so it will follow the electric field lines, which point away from the charge).

Moreover, the test charge q must be small compared to charge Q. This is because we don't want to modify significantly the configuration of the electric field, so the test charge q must be negligible compared to charge Q.

Answer: Average acceleration is -2.407 [tex]\frac{m}{s^{2}}[/tex]

Explanation:

Average acceleration is equal to change in velocity divided by time taken

therefore, [tex]a=\frac{Vf-Vi}{t}[/tex]

=> [tex]a=\frac{37-89}{6}\times \frac{5}{18}\frac{m}{s^{2}} = -2.407 \frac{m}{s^{2}}[/tex]

Answer: He did none.

Explanation:

Even though he may have felt like he did work, none was done.

The only way for work to happen is if the object moves.

Answer:

Zero

Explanation:

Work done on an object is defined as the product of force applied on an object and the distance traveled by the object due to the applied force. here the force applied is in the direction of force.

Generally,

Work = force in the direction of displacement x displacement

Here, the displacement is zero

so, the work done by Luke to push the wagon is zero.

Answer:

14.7 m/s

Explanation:

In this problem we have

u = 3.2 m/s is the initial velocity of the cyclist

a = 2.3 m/s^2 is the acceleration of the cyclist

We want to know the cyclist speed after a time of

t = 5.0 s

So we can use the following equation:

[tex]v=u+at[/tex]

Substituting the numbers, we find

[tex]v=3.2 m/s + (2.3 m/s^2)(5.0 s)=14.7 m/s[/tex]

The Philippine Sea plate is tectonically unusual in that almost all the boundaries are convergent.

The Pacific plate is subducting beneath the Philippine Sea plate to the east while the west/northwestern part of the Philippine Sea plate is subducting beneath the continental Eurasian plate.

Answer: Eurasian

Eurasian plate borders the Philippine plate. The correct option is C.

The Philippine Sea plate has all the boundaries convergent. It is a plate that lies below the lithosphere.

The Pacific plate is shifting beneath the Philippine Sea plate to the east. The west of the Philippine Sea plate is shifting beneath the continental Eurasian plate.

Thus, Eurasian plate borders the Philippine plate. The correct option is C.

Learn more about Philippine plate.

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Answer:

Thermosphere

temperature continue to rise up to 1500*C

Ionosphere

Mesosphere

temperature falls to -93*C

Stratosphere

protective ozone layer

UV radiation causes temperature to rise

Troposphere

78% nitrogen, 21% oxygen

temperature drops from 17 to -52*C

Explanation:

Answer:

Explanation:

Answer:

Explanation:

The half life is the time taken for half of a radioactive substance to disintegrate.

The shorter the half life, the larger the decay constant and the faster the decay process.

For a very large half life, it would take a very long time for the radioactive nuclide to decay to half.

With each half life reached, a new set of daughter cell is formed. Atoms that have short half life would decay rapidly. Every radionuclide has its own characteristic half-life.

If the number of half-lives increases, then the number of radioactive atoms decreases, because approximately half of the atoms' nuclei decay with each half-life. With this observation, we can hypothesise and conduct experiment to support the assertion that as the number of half-lives increases then the number of radioactive atoms decreases.

If the number of half-lives increases, then the number of radioactive atoms decreases, because each half-life reduces the quantity of radioactive atoms by about half. This is due to the nature of radioactive decay, causing a consistent, exponential decrease over time.

A hypothesis about how the number of half-lives impacts the number of radioactive atoms might be: If the number of half-lives increases, then the number of radioactive atoms decreases because approximately half of the atoms' nuclei decay with each half-life.

In the concept of radioactive decay, a half-life denotes the period of time it takes for half of the atoms in a radioactive sample to decay. When there are more half-lives that pass, this indicates more time has passed, and therefore more of the radioactive atoms would have decayed. Consequently, the number of radioactive atoms lessens over time due to this continuous decay.

For example, if you started with 1000 radioactive atoms and the half-life of this particular substance is 1 year, after one year (one half-life), there would be approximately 500 radioactive atoms remaining. After two years (two half-lives), around 250 atoms would remain, and so on. Hence, it's crucial to realize that the decrease in the number of radioactive atoms is exponential, not linear.

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Answer:

If the speed of an object is unchanging it means that it's traveling at a constant speed.

If the speed of the object increases or decreases it means that the speed is changing. That's why those options are not valid.

The average speed implies that the speed changes over time, but just the average remains the same. That's why this option is not valid.

If the speed of an object is unchanging, then the object is traveling at a constant speed.

"Unchanging" and "constant" mean the same thing.

Answer: Choice 1

Law of Reflection

Theta(i)=Theta(r)

Angle of incidence=Angle of reflection

Which describes the law of reflection?

The laws of reflection are, the incident ray, the reflected ray and the normal to the reflection surface at the point of the incidence are lie in the same plane. The reflected ray and the incident ray are on the opposite sides of the normal.

The law of reflection states that when a ray of light reflects off a surface, then the angle of incidence is equal to the angle of reflection.  Light is known to behave in a very predictable manner.

In the diagram the ray of light that approaching the mirror is known as the incident ray (labeled I), whereas the ray of light that leaves the mirror is known as the reflected ray (labeled R) .

Grade:  9

Subject:  physics

Chapter:  reflection

Keywords:   the law of reflection, reflection, incidence, the angle of incidence, angle

Answer: the centripetal acceleration is changed by a factor of four

Explanation:  An object moving in a circular motion at constant speed has zero tangential acceleration but the direction of the tangential velocity vector changes as the object rotates. This change in direction of the tangential velocity vector results in centripetal acceleration ([tex]a_c[/tex]) given by

[tex]a_c=\frac{v^{2}}{r}[/tex]

where v=speed of object , r= radius of circular path

Thus if [tex]v_2=2v_1[/tex] then

[tex]a_2=\frac{v_2^{2}}{r_2}=\frac{(2v_1)^{2}}{r_1}=4\times \frac{v_1^{2}}{r_1}=4a_1[/tex]

Thus If the speed is doubled, the centripetal acceleration is changed by a factor of four .

Final answer:

The centripetal acceleration will increase by a factor of 4 when the speed of an object in circular motion is doubled, because centripetal acceleration is proportional to the square of the velocity.

Explanation:

An object is traveling in circular motion at constant speed. When the object's speed is doubled, its centripetal acceleration is affected significantly because the acceleration in circular motion is directly proportional to the square of the velocity. The formula for centripetal acceleration (ac) is ac = v² / r, where v is the speed of the object and r is the radius of the circular path.

Since the relationship is quadratic, if you double the speed (v becomes 2v), the new acceleration will become (2v)² / r = 4v² / r. This shows that the centripetal acceleration will increase by a factor of 4, which is the square of the factor by which the speed is increased.

D is the answer I’m pretty sure

It transforms into heat and gets dissipated to the surroundings in the natural way of moving from hot locations to cooler ones.

Answer:

B

Explanation:

MOST elements on the periodic table are metals.

Answer:B

The answer is D, Mesopelagic.

The ocean zone that has the most sunlight is Mesopelagic. The correct option is D.

The Mesopelagic zone is a scope of sea depth that beginnings from 650 feet beneath the water's surface to around 3,280 feet underneath. Light entrances from the outer layer of the sea almost scatter at this area. The most widely recognized organic entities found in the mesopelagic zone are little fish, squid, and basic shellfish.

This region receives most of the sunlight.

Thus, the correct option is D.

Learn more about Mesopelagic.

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Answer:

To demonstrate that an electric current (i.e., moving electric charge) generates a magnetic field, all you need do is simply place a magnetic compass next to a wire in a circuit. When current is passed through the wire, the compass will deflect, indicating the presence of a magnetic field circling the wire.

Explanation:

Electric field is always associated with magnetic field.

Explanation:

Relationship between electric and magnetic fields can be explained by the following example. Consider a wire and a magnetic compass placed close together.

When current is flowing through the wire, the needle in the magnetic compass will deflect showing some value indicating the presence of magnetic field during the experiment. This indicates that the electric field is generally accompanied with the magnetic field.