i dont know what subject this is sorry but it would help if someone could answer this

Answer:

A) 1.2x10^5 J

Explanation:

Answer:

Answer:

m/s is answer for your questions

Answer: I scored a 9/10

Explanation:

I agree with Kathy gravity must be acting the same on both balls just because one ball is heavier doesn’t mean they will hit different times if the wooden ball was drop closer to the ground then the wooden ball would hit the ground first

Answer:

Smoother surfaces, and less contact between objects.

Explanation:

Smoother surfaces create less friction and drag among the object pulled, so we definitely need those kinds of surfaces to reduce friction.

Answer:search this up but put quizzlet at the end it should be there

Explanation:

Explanation:

Time=distance/speed

=600/50

=12

=600/60=10

==12-10=2 hours

Explanation:

A molecule is a group two or more atoms held together by chemical bonds.

Answer:

....

Explanation:

Answer:

What do you mean.

Explanation:

Answer: Body senses provide you with information about the position of your body in respect to your environment. The four main ones are touch, pain, vestibular, and kinesthesis.

More in details:

Our senses allow us to experience the world we live in, and are one of the key components of consciousness. ... This is why the study of our senses, or sensation, is considered to be such an important area of psychology, because it is one of the key components that makes consciousness possible.

Answer:DOWN a Group: Atomic radius INCREASES as you go DOWN a Group because each successive Period (row) has an additional occupied energy level. If you visualize the not 100% accurate but still useful Bohr model of the atom, you can think of it this way: each time you drop down a row, you add a "ring." ACROSS a Period: Atomic radius DECREASES as you go ACROSS a Period because the net nuclear charge increases (Huh?). Remember, it's the protons (+) in the nucleus that pull on or attract the electrons in the orbitals. Across a Period you are adding more and more protons pulling on electrons occupying the same orbitals. The overall effect is more pulling power in the same basic space. This draws the electrons in closer, making the overall atomic radius smaller at the right side of a Period.

Ionization Energy:

DOWN a Group: Ionization energy DECREASES as you go DOWN a Group because the farther the valence electrons are from the nucleus (pulling power of the protons) the less energy it costs another atom to steal them. ACROSS a Period: Ionization energy INCREASES as you go ACROSS a Period because atoms are getting ever closer to that magic "octet" rule for stability via the Noble Gas configuration. In plain speak - your frequent buyer punch card gets one step closer to the freebie each time you move closer to the right of the Periodic Table so you guard those punches more carefully. The atomic radius is getting smaller, too, so those protons do a great job of holding on tighter.

Electron Affinity:

Electron affinity is a bit outside the scope of this class so I'm not going to get into it too deeply, other than to point out the general trend.

DOWN a Group: Electron Affinity DECREASES (a tiny bit) as you go DOWN a Group because elements become slightly less attractive toward electrons. Father from the pull of those protons, remember?  ACROSS a Period: Electron Affinity INCREASES as you go ACROSS a Period because generally speaking (and remember, exclude the Noble Gases here) elements toward the right of the Periodic Table give off a great deal of energy when they gaining electrons to become more stable.

Electronegativity:

DOWN a Group: Electronegativity DECREASES as you go DOWN a Group because the valence electrons are increasingly farther away from the attraction of the protons in the nucleus. Less pull, less "desire" to grab other electrons. ACROSS a Period: Electronegativity INCREASES as you go ACROSS a Period because the number of protons (+ charges) in the nucleus increases. More protons in the nucleus means electrons are more strongly attracted to the nucleus.

Chemical Reactivity:

METALS

DOWN a Group: In METALS reactivity INCREASES as you go DOWN a Group because the farther down a Group of metals you go, the easier it is for electrons to be given or taken away, resulting in higher reactivity. ACROSS a Period: In METALS reactivity DECREASES as you go ACROSS a Period because though they still want to give away valence electrons they have more of them to get rid of, which requires more energy. Not as easy to blow off a little steam!

I can't help it, I just love this video on reactivity (however embellished the reactions) down the Alkali Metals. Top Gear (BBC) fans will recognize Richard "Hamster" Hammond as the narrator here. Enjoy!

Explanation:

Answer:

How long would it take a machine to do 13,000 joules of work if the power rating ... An object gains 15 joules of potential energy as it is lifted vertically 5.0 meters. ... As the time required to do a given quantity of work decreases, the power ... How much work is being done to the system by the person of the sled moves 10 m?

Answer:

KE increases and PE decreases.

Explanation:

First, note that the formula for kinetic energy is KE = (1/2)mv^2 where m is the mass and v is the velocity and the formula for potential energy is PE = mgh where h is the height it is at. Since mass and the acceleration provided by gravity doesn’t change, we can disclude that our conclusion. We know that the height (h) and velocity (v) does change, so let’s look at that. As you continue down the slope, you accelerate due to gravity. Thus, velocity increases and KE increases. As you continue down the slope, you get closer to the ground, hence h decreases and PE decreases.

I hope this helped! :)

Answer:10

Explanation:

You have to do speed divided by time so your answers 10

Answer:

it is the fourth one!

Explanation:

i just did it on ap3x :)

The resistance of a wire which is used to power clothes dryer rank third as the area and diameter of wire is inversely proportional to the resistance of the wire. Thus, the correct option is A.

Electrical resistance is a measure of the opposition or friction to the current flow in an electrical circuit. Resistance is measured in the unit of ohms, that is symbolized by omega (Ω). Resistance of an electrical wire can be calculated by the formula:

R = (ρ×L)/A

where, R = Resistance of the wire,

ρ = Resistivity or specific resistance,

L = length of the electrical length,

A = Cross-sectional area of the electrical wire.

The resistance of a electrical conductor is dependent on the following factors including the cross-sectional area of the conductor, length of the conductor and the material of the electrical conductor.

Therefore, the correct option is A.

Learn more about Electric wire here:

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Answer:

La rapidez media general fue 30 km/h.

Explanation:

Para encontar la rapidez media debemos hallar el tiempo que tarda cada uno en recorrer 300 km (cad uno recorre la mitad del recorrido total que es 600m):

[tex] t_{1} = \frac{1 h}{60 km}*300 km = 5 h [/tex]

[tex] t_{2} = \frac{1 h}{20 km}*300 km = 15 h [/tex]                              

[tex]t_{T} = t_{1} + t_{2} = 5 h + 15 h = 20 h[/tex]

Entonces, la rapidez media es:                    

[tex]v = \frac{\Delta x}{\Delta t} = \frac{600 km}{20 h} = 30 km/h[/tex]

Por lo tanto, la rapidez media general fue 30 km/h.

Espero que te sea de utilidad!                  

Explanation:

Variety in to an exercise program allows the body to adapt to many demands, from high intensity exercise to slow, steady state exercise. Variety is important in a fitness program because it allows for your body to be challenged on a consistent basis and to overcome a plateau.

When practicing calisthenics, the athlete's body is the only element that offers resistance. Thus, the resistance is ultimately provided by _gravity_. Option C is correct.

---------------------

Calisthenic is a physical discipline that is based only on the use of body weight.

It is a training system with physical activities that do not require any external element (weights, balls, cord). Gravity is the only force that exerts resistance.

This discipline develops strength, precision, and movement coordination, which are fundamental to increasing the difficulty of the exercises.

The athlete's body is the only element that offers resistance. Thus, the resistance is ultimately provided by _gravity_.

------------------------------

You can learn more about Calisthenic at

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Answer:

C

Explanation:

Answer:

the Noble gases

Explanation:

the Noble gases are atoms that do not easily react with or form bonds with other atoms

Answer:

Isn't it technically your brain? Because it's always in your skull and when you're younger you have cracks in your skull but as you grow, your skull fossilizes to mend those cracks. IT FOSSILIZES!

Explanation:

Answer:

a) t = 2.55s

b) [tex]v_{0x} = 9.80 m/s[/tex]

c) yes

Explanation:

In order to solve this problem, we can start by drawing a sketch of the situation so we can better visualize what the problem is about (see attached picture).

a)

For the first question. We are talking about a movement in two dimensions. So on the first question they are asking us for vertical movement. It will be uniformly accelerated, so we can use the following formula:

[tex]y_{f}=y_{0}+V_{0y}t+\frac{1}{2}at^{2}[/tex]

We know the following:

[tex]y_{f}=0[/tex]

[tex]y_{0} = 32m[/tex]

[tex]V_{0y}=0[/tex]

t=?

[tex]a=-9.81 m/s ^{2}[/tex]

With this data, we can simplify our equation, so we end up with:

[tex]y_{0}+\frac{1}{2}at^{2}=0[/tex]

so we can now substitute the data we know and solve for t:

[tex]32m-\frac{1}{2}(9.81 m/s^{2})t^{2}=0[/tex]

[tex](-4.905 m/s^{2})t^{2}=-32m[/tex]

[tex]t^{2} = \frac{-32m}{-4.905 m/s^{2}}[/tex]

[tex]t=\sqrt{6.52s^{2}}[/tex]

t = 2.55 s

b)

For part b, since we are talking about horizontal movement and we are neglecting drag, this means that his horizontal speed will be constant. So we can use the following formula:

[tex]V_{x}=\frac{x}{t}[/tex]

we know he most move a horizontal distance of 25 meters in a time of 2.55s so we get:

[tex]V_{x} = \frac{25m}{2.55s}[/tex]

[tex]V_{x}=9.80 m/s[/tex]

c) for part c, we can do the conversion between miles per hour to meters per second like this:

[tex]\frac{27mi}{1hr}*\frac{1hr}{3600s}*\frac{5280ft}{1mi}*\frac{0.3048m}{1ft}[/tex]

so the given initial speed is equivalent to:

12.07 m/s

this is greater than the minimum 9.80 m/s we need, so the skater will clear the pool at this speed.

(a) The time spent in air by the skateboarder is 2.56 s

(b) The initial speed needed by the skateboarder to clear the pool is 9.77 m/s.

(c)  The skateboarder with given initial speed of 27 mph will clear the pool since it is greater than minimum initial velocity required.

The given parameters;

The time spent in air by the skateboarder is calculated as follows;

[tex]h = v_0t + \frac{1}{2} gt^2\\\\h = 0 + \frac{1}{2} gt^2\\\\gt^2 = 2h\\\\t = \sqrt{\frac{2h}{g} } \\\\t = \sqrt{\frac{2\times 32}{9.8} } \\\\t =2.56 \ s[/tex]

The initial speed needed by the skateboarder to clear the pool is calculated as;

[tex]v = \frac{d}{t} \\\\v = \frac{25}{2.56} \\\\v = 9.77 \ m/s[/tex]

The initial speed of the skateboarder is m/s;

[tex]27 \ \frac{mile}{hour} \times \frac{1609.3 \ m}{1 \ mile} \times \frac{1 \ hr}{3600 \ s} = 12.07 \ m/s[/tex]

Thus, the skateboarder with given initial speed of 27 mph will clear the pool since it is greater than minimum initial velocity required.

Learn more here:https://brainly.com/question/14670531

Answer:

Echolocating animals emit calls out to the environment and listen to the echoes of those calls that return from various objects near them. They use these echoes to locate and identify the objects. Echolocation is used for navigation, foraging, and hunting in various environments.

Answer:

Para que la masa del proton sea 1 kg se requieren alrededor de 6x10²⁶ protones.

Explanation:

Sabiendo que la masa del proton es:

[tex]m_{p} = 1,67 \cdot 10^{-27} kg[/tex]

Entonces para que la masa sea 1 kg tenemos:

[tex] 1 kg = N*m_{p} [/tex]

En donde N es el número de protones.

[tex]N = \frac{1 kg}{1,67 \cdot 10^{-27} kg} = 6 \cdot 10^{26}[/tex]

Por lo tanto, para que la masa del proton sea 1 kg se requieren alrededor de 6x10²⁶ protones.

Espero que te sea de utilidad!  

The answer you are looking for is approximately 9.4 m/s.

Solution/Explanation:

First, writing out the formula for the speed of an object, encompassing distance and time, in meters per second, or m/s,

S=D/T.

"S" stands for "Speed."

"D" stands for "Distance."

"T" stands for "Time."

Speed (S)=????

Distance (D)=100m.

Time (T)=10.6s.

Substituting the given values of the variables,

S=100m/10.6s.

100÷10.6=9.43396226415≈9.4.

So, therefore, the final answer is approximately 9.4 m/s.

I hope that this has helped answer your question. Good day to you.

Explanation:

length of pipe= 32 ft

wavelength of wave λ= 8.8 m

let f be frequency

we know velocity of wave v=λf

therefore, f=v/λ = 346/8.8 = 39.31 per second or hertz

time period = 1/f = 1/39.31 = 0.02543 seconds

The frequency of this sound will be 39.31-sec⁻¹or Hz. While the time period will be 0.02543 sec.

Frequency is defined as the number of repetitions of waves occurring in 1 second. Frequency is also defined as the number of cycles completed in 1 second. SI unit of frequency is Hz.

The given data in the problem is;

L is the length of pipe= 32 ft

λ is the  wavelength of wave= 8.8 m

f is the frequency=?

T is the time period=?

The frequency is fine as the ratio of the speed of wave and wavelength.,

[tex]\rm f= \frac{v}{\lambda} \\\\ \rm f= \frac{346}{8.8}\\\\ \rm f= 39.31 \ Hz[/tex]

The time period is guven as the inverse of the time period.

[tex]\rm T = \frac{1}{f} \\\\ \rm T = \frac{1}{39.31} \\\\ \rm T = 0.02543\ sec[/tex]

Hence the frequency of this sound will be 39.31-sec⁻¹or Hz. While the time period will be 0.02543 sec.

To learn more about the frequency reference to the link;

https://brainly.com/question/14926605

Answer:

option A because in sport pain makes a player strongest.......

Answer: Choice C: You should understand the risks of each sport and listen to your body.

Explanation: The statement that BEST describes the process of playing sports is C. You should understand the risks of each sport and listen to your body. It’s important to be aware of the potential risks associated with each sport and to pay attention to your body’s signals to avoid injury.

more than mg

Explanation:

the pressure