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Answer:

given us,

initial velocity (u)= 45m/s

time(t)= 1 min

final velocity (v)=?

here,

average acceleration = v-u/t

= v- 45/1

v= 45/1

:. v=45m/s

:. the average acceleration of the car in m/s^2 is 45m/s

Explanation:

we can use acceleration formula

Answer:

The answer is C 1.8V and 0.38A

Answer:

base ball data 55.1 N

football player 62.0 Kg

wagon data 3.64 m/s2

Explanation:

F=ma

a=f/m

m=f/a

force (N)

mass (KG)

acceleration (A)

The force exerted by Baseball is 55.01 N.

The mass of the Football player is 62.0 Kg.

The acceleration of the Wagon is 3.63 m/s².

Force is the influence that can change the state of the body of rest or motion. Force is a vector quantity and the SI unit of force is Newton. Force can change the direction and speed of the moving object.

The force can be determined by the product of the mass (m) and acceleration (a). The mathematical expression from the second law of motion for force can be written as:

F = ma

Given, the mass of the baseball is 0.142 Kg and the acceleration of the baseball is  388 m/s2.

The force exerted by the baseball, F = ma =  0.142 Kg × 388 m/s2

F =  55.096 N

F = 55.01 N

Given, the acceleration of the football player, a = 0.426 m/s2

The net force = 28.39 - 1.98 = 26.41 N

The mass of football player, m = F/a = 26.41/0.426 = 61.99 = 62.0 Kg

The force of the wagon, F = 128 N

The mass of the wagon = 77.6 Ibs = 77.6 × 0.454 Kg = 35.23 Kg

The acceleration of the wagon = 128/ 35.23 = 3.63 m/s²

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Micah knows that a car had a change in velocity of 15 m/s.To determine acceleration ,Micah also needs the TIME of the total trip in seconds.

Answer:

its b

Explanation:

The steps which can be taken to properly care for your skeletal system

include performing exercises and eating foods rich in calcium and vitamins.

The skeletal system comprises of the muscles, bones, teeth etc and they

help to provide support and shape to the body. Eating the right food and

performing  certain activities will help care for this system.

Foods rich in calcium and Vitamin D and exercises such as running, weight-

bearing etc should be taken into consideration to aid proper care of the

skeletal system.

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Answer:

In order to properly take care of your skeletal system there are a multitude of activities or things you can do to improve the condition of your skeletal system. For starters you can exercise more often, depending on how much you already exercise because working out more is not always the best thing to do if you already have an intense exercise schedule. Then, you should take into consideration what you are eating and what vitamins, supplements, or medication you're taking. Once you have evaluated what your situation is, you should make a plan that best suits you based on your needs. Ingesting the proper nutrients and vitamins you need is essential to having a strong skeletal system, for example vitamin D and calcium are excellent supporters of the skeletal system.

Explanation:

This is what I wrote, change it up a bit and you'll be good. I got a 100% :)

Answer:

Velocity ratio = 5

Explanation:

Velocity ratio can be defined as the ratio of the distance moved by effort to the distance moved by the load in the same time.

Given the following data;

Distance moved by the rope (effort) =50m

Distance moved by the flag (loadl =10m

Velocity ratio = distance move by the effort/distance moved by the load

Velocity ratio = 50/10

Velocity ratio = 5

Answer:

A change of one degree Celsius = a change of one Kelvin, but a Celsius temperature is never equal to a Kelvin temperature. A change of 1 degree Fahrenheit equals a change of 5/9 = 0.56 degrees Celsius. To convert a Fahrenheit temperature to Celsius, subtract 32 and multiply by 5/9.

Explanation:

The temperature difference in Celsius scale is greater than the temperature difference in Fahrenheit scale.

Change in temperature of 1°C = 9/5 × change in temperature of 1°F.

The physical concept of temperature indicates in numerical form how hot or cold something is. A thermometer is used to determine temperature.

Thermometers are calibrated using a variety of temperature scales, which historically defined distinct reference points and thermometric substances. The most popular scales are the Celsius scale, sometimes known as centigrade, with the unit symbol °C, the Fahrenheit scale (°F), and the Kelvin scale (K).

As change in temperature of 100°C = change in temperature of 180° F

change in temperature of 1°C = change in temperature of (180/100)°F

= 9/5 × change in temperature of 1°F.

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Answer:

See the answers below

Explanation:

To solve this problem we must use the following equation of kinematics.

[tex]v_{f}=v_{o}+a*t[/tex]

where:

Vf = final velocity [m/s]

Vo = initial velocity [m/s]

a = acceleration [m/s²]

t = time [s]

First case

Vf = 6 [m/s]

Vo = 2 [m/s]

t = 2 [s]

[tex]6=2+a*2\\4=2*a\\a=2[m/s^{2} ][/tex]

Second case

Vf = 25 [m/s]

Vo = 5 [m/s]

a = 2 [m/s²]

[tex]25=5+2*t\\t = 10 [s][/tex]

Third case

Vo =4 [m/s]

a = 10 [m/s²]

t = 2 [s]

[tex]v_{f}=4+10*2\\v_{f}=24 [m/s][/tex]

Fourth Case

Vf = final velocity [m/s]

Vo = initial velocity [m/s]

a = acceleration [m/s²]

t = time [s]

[tex]v_{f}=5+8*10\\v_{f}=85 [m/s][/tex]

Fifth case

Vf = final velocity [m/s]

Vo = initial velocity [m/s]

a = acceleration [m/s²]

t = time [s]

[tex]8=v_{o}+4*2\\v_{0}=8-8\\v_{o}=0[/tex]

Answer:

A

Explanation:

0-2         1.0

2-4         0.5

4-6         0

The table of velocity of toy car is drawn below.

What is velocity ?

velocity is defined as rate of change of displacement of the object with respect to rate of change in time. In mathematics It is written as :

                                           [tex]\begin{aligned}v= \frac{\Delta d}{\Delta t}=\frac{d_{2}-d{1}}{t_{2}-t_1}\end{aligned}[/tex]

considering time interval from t=0 sec to t=2 sec the distance travelled by the toy car is d=0m to d=2m. therefore, the velocity will be :

                                      [tex]\begin{aligned}v&=\frac{d_{2}-d{1}}{t_{2}-t_1}\\&=\frac{2-0}{2-0}\\&=1 \text{\:m/s}\end{aligned}[/tex]

similarly for interval t = (2sec - 4sec ) and t = (4sec - 6sec) is also calculate and written in table below.

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Answer:

that is what I got for my answer

Explanation:

I Calculate it and I got 1600

Answer:

Protection – Protect the wounded area with a support or something similar.

Rest – Do not continue to exercise while your wound is healing. It may take a few weeks or months to recover. You may need crutches or a sling.

Ice – Wrap a bag of ice or a bag of frozen peas in a towel and apply it to the wounded area for 15–20 minutes every two to three hours.

Compression – Apply elastic compression bandages to the wounded area during the day to reduce swelling.

Elevation – Make sure the injured body part is elevated above the height of your heart as much as possible to help reduce swelling.

Explanation:

Just did it.

Answer:

The five-step process for treating a muscle or joint injury such as an ankle sprain is called "P.R.I.C.E." which is short for Protection, Rest, Ice, Compression, and Elevation).

It can be used even by someone without first-aid training, and should be used immediately when an injury occurs – the earlier, the better – while further medical attention is being sought.

If the athlete experiences too much pain during the process, stop immediately.

"P" is for Protection

Protect the injured person and the area being treated but also protect yourself. If the injury occurs on the sports field, stop the game.

Protect the area being treated with a splint if possible.

If the athlete can move, carefully move them to a safer area using a stretcher or a crutch, but if there is any doubt, do not move the injured athlete.

"R" is for Rest

When a child is injured, the body responds in an effort to defend, localize, protect, and clean up the injured area, a response called inflammation. At the time of injury small blood vessels at the injury site rupture and cause tissue bleeding, which, in turn, can cause bruising and swelling.

Explanation:

There are five warning signs of inflammation:

Pain

Redness;

Tissue hotness;

Swelling, and

Loss of function.

Not every injury exhibits all these signs, but if your child is in pain then it is important to stop exercising immediately to avoid further damage.

"I" is for Ice

As soon as possible after injury, begin applying ice continuously for the first 15-20 minutes to decrease swelling and pain.

An ice bag can be applied directly to the skin (except on the outside of the knee) unless the child has a known cold allergy.

The safest form of icing is to use a plastic bag with ice cubes or crushed ice, or instant cold packs. Do not use “blue ice” or “gel packs”.

While icing will be uncomfortable at first, in 2 to 3 minutes, the skin will go numb and the ice bag will feel more comfortable.

If the child is very uncomfortable with ice bag, then a barrier like a wet towel can be placed between the ice and skin.

The ice bag can be secured in place using an elastic bandage, but the compression should not be too tight.

During the application of the ice, ask the child to wiggle their fingers/toes and monitor tissue around area that is being iced to ensure that they are not experiencing a lost of sensation.

Icing for 15-20 minutes with an ice bag is unlikely to cause nerve damage or frostbite; however, any loss of sensation and any changes in tissue coloration in areas other than the area that is being iced indicate that the application is no longer safe.

Because ice and plastic bags are so important, make sure that someone brings these to every practice and game. Better yet, to be on the safe side, bring your own!

Answer:

0.2 Hz

Explanation:

f= 1/T where f= frequency and T=period

f= 1/5 sec

=0.2 Hz

Answer:

.2

Explanation:

Answer:

99.48

Explanation:

99.48

Answer:

The product of mass times velocity for both objects is the same.

Explanation:

They both have the same velocity. False

They both have the same mass. False: Because two objects of different masses can have the same momentum. The least massive of the two objects will have the greatest kinetic energy.

The product of mass times velocity for both objects is the same. True: Same momentum means that the large mass must have a small velocity; therefore, their product is equal to the small mass times a large velocity.

Mass and velocity is the same for both. False: Based on what was stated for the second option.

Answer:

Conduction occurs more readily in solids and liquids, where the particles are closer to together, than in gases, where particles are further apart. ... As these molecules collide, thermal energy is transferred via conduction to the rest of the pan.

Explanation:

Metals have tightly packed atoms which can easily pass on their kinetic energy and also have free moving electrons.

Answer:

A mineral has a volume of 6 mL and a mass of 12g.

Explanation:

Was this right?

Answer:

Their function is to produce sound by allowing the free edges of the folds to vibrate against one another and also to act as the laryngeal sphincter when they are closed.

Answer:

no not always sometimes they react at all so false I hope I helped :)

Answer:probably false

Explanation:

Every time you mix two substances it doesn’t mean it’s going to have a reaction, they have to be two substances that don’t combine. I really hope this helps

Answer:

The soprano's singing matched the natural frequency of the glass, causing it to vibrate. The strong vibrations caused the glass to shatter.

Explanation:

edg 2020

Answer:

S = 415.64m

Explanation:

Given the following data;

Time, t = 9.21secs

Since it's a free fall, acceleration due to gravity = 9.8m/s²

Initial velocity, u = 0

To find the height of the tower, we would use the second equation of motion;

[tex] S = ut + \frac {1}{2}at^{2}[/tex]

Where;

Substituting into the equation, we have;

[tex] S = 0*9.21 + \frac {1}{2}*(9.8)*9.21^{2}[/tex]

[tex] S = 0 + 4.9*84.8241[/tex]

[tex] S = 4.9*84.8241 [/tex]

Height, S = 415.64m

Therefore, the tower is 415.64m in height.

Answer:

B. helium, xenon, neon

Explanation:

Answer:

cookie

Explanation:

Answer:

This question is incomplete, a possible question would be to calculate the work done by the ball.

Work done = 8J

Explanation:

Work done by an object is calculated my multiplying the force by the distance.

The weight of this ball is 2.0N, which also represents the force exerted by the ball. The ball travels through a distance of 4m

Hence, work done = F × d

Work done = 2N × 4m

Work done = 8Nm or 8J

Answer:

D. The United States

Explanation:

Answer:

0

Explanation:

Moving east at constant velocity then a=0

Answer/Explanation:

The mechanical energy is 200 joules. Mechanical energy is determined by adding the total kinetic energy by the total potential energy.

M = kp

100 + 100 = 200

Explanation:

Hey there!

Given;

Mass of the Earth (M) = 6.0*10^24kg.

Radius of Earth (R) = 6400km = 6400*1000= 6.4*10^6.

Gravitational constant (G) = 6.67*10^-11Nm^2/kg^2.

Height from surface of Earth (h) = 350km= 3.5*10^5m

Gravity (g) = ?

We have;

[tex]g = \frac{G.M}{ {(R + h)}^{2} } [/tex]

Where "G" is gravitational constant, "M" is mass of earth, "g" is acceleration due to gravity, "h" height from surface of Earth.

Keep all values.

[tex]g = \frac{6.67 \times {10}^{ - 11} \times 6.0 \times {10}^{24} }{ (6.4 \times {10}^{6} + 3.5 \times {10}^{5} )^2} [/tex]

[tex]or \: g = \frac{40.002\times {10}^{13} }{ (6.4\times {10}^{6} + 3.5*10^5)^2} [/tex]

g = 8.7m/s^2

Therefore, gravity from distance 350km above the Earth's surface is 8.7m/s^2.

Hope it helps...

Answer:

Both the initial and final substances are composed of atoms because all matter is composed of atoms. According to the law of conservation of matter, matter is neither created nor destroyed, so we must have the same number and kind of atoms after the chemical change as were present before the chemical change.

Explanation:

Answer:

The law of conservation of atoms is simple but it has a great affect. An atom cannot be destroyed by such a force. Matter/atoms can't be created by any means. An atom exits only by nature and not by force.

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Answer:

Explanation: C is the correct one

because A) the current divides into parts for each branch

B)the current doesn't varry in series

D) in parallel the current divides and passes in all branches

Answer:

2 m/s

Explanation:

Given that,

Mass of a man, m₁ = 75 kg

Mass of object, m₂ = 5 kg

Velocity of the object, v₂ = 30 m/s

We need to find the recoil velocity of the man. Let it is v₁. In the whole process, the momentum of the system will remain conserved such that,

[tex]m_1v_1=m_2v_2\\\\v_1=\dfrac{m_2v_2}{m_1}\\\\v_1=\dfrac{5\times 30}{75}\\\\v_1=2\ m/s[/tex]

So, the recoil velocity of the man is 2 m/s