Answer:
The answer is 2 hoursExplanation:
To find how long it took we use the formula
[tex]t = \frac{d}{v} \\ [/tex]
d is the distance
v is the velocity
From the question we have
[tex]t = \frac{30}{15} \\ [/tex]
We have the final answer as
2 hoursHope this helps you
The ball’s _______________ potential energy is transforming into more kinetic energy as the ball’s altitude is decreasing. What does that do to the speed of the ball?
Answer:
the ball's Stored energy 2. The balls altitude slowly comes to a stop going back into potential Energy
Explanation:
function Of The glottis
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.
Kinetic energy of 110 j and velocity of 70 m/s what is the mass
Answer:
0.04kg
Explanation:
Explanation in pics:
The formula for kinetic energy is KE = 1/2mv². So now the question asks for the mass, not KE. So we need to rearrange the formula so that we are calculating the mass. So, the formula for mass is m=KE/(1/2v²). Now we just substitute the values into the formula. Then just follow what it shows in the pic
If the net force on an object is to the left, what will the direction of the resulting acceleration
be? What will be the direction of the velocity?
Anyone please help ???
Acceleration points in the same direction as the net force, so to the left.
The direction of velocity can't be determined from this information alone, though. If the object is at rest, it will being moving to the left. If the object is already moving to the left, it will continue doing so and speed up. If it starts off moving to the right, it will continue to move to the right but eventually slow to a stop before starting to move to the left. There are more cases to consider if you're talking about motion in more than one dimension.
What steps can you take in your everyday life to properly care for your skeletal system? (Site 1)
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% :)
If Object C and Object D both have the same momentum, which statement is true? Question 11 options: They both have the same velocity They both have the same mass The product of mass times velocity for both objects is the same. Mass and velocity is the same for both.
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.
HELP
which two changes to a metal wire both increases resistance? the answer is B but why ?
Answer:
option C decreasing its thickness and increasing its temperature.Explanation:
Resistance is directly proportional to length and temperature of the wire and inversely to area.if you increase the temperature the resistance will increase.(resistance is directly proportional to temperature)if you decrease its thickness (area) then the resistance will increase ( resistance is inversely proportional to area)hope it helps:)
Which of the following accurately describes circuits? Question 6 options: A) In a parallel circuit, the same amount of current flows through each part of the circuit. B) In a series circuit, the amount of current passing through each part of the circuit may vary. C) In a series circuit, the current can flow through only one path from start to finish. D) In a parallel circuit, there's only one path for the current to travel.
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
The soprano's singing caused a drinking glass to shatter.
Explain why this happened using what you know about
resonance.
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
HURRY 15 POINTS
The third most populated country in the world is __________. A. China B. India C. Canada D. the United States Please select the best answer from the choices provided A B C or D. Only pick one. this is from edunity.
Answer:
D. The United States
Explanation:
If a man with a mass of 75 kg, standing still, throws an object with a mass of 5 kg at 30 m/s, what will be the recoil velocity of the man, assuming he is standing on a frictionless surface?
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
True or False: A chemical reaction always happens when two substances are combined. (please help fast this is a test)
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
Why does conduction occur in solids?
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.
Compare a change in temperature of 1°C to a change of 1°F.
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.
What is temperature?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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Meteorites are of three kinds: stones, irons, and stony irons. Each
corresponds to a different part of planet formation. The stones resemble
pieces of planetary crust and mantle, the irons the planet cores, and the
stony irons the transitional area between core and mantle. In some stony
irons, translucent crystalline structures interpenetrate with opaque mantle
rock Collectors sometimes cut stony irons into thin slices and illuminate
them from one side for a gorgeous stained glass effect. Only one per cent
of all meteorites are stony irons. Five per cent are irons, and the remaining
ninety-four per cent are stones. The main function of the paragraph is to:
identify the three kinds of meteorites and provide information about each kind,
describe the chemical structure of the different types of rock found within the
meteorites classified as stones
explain why some meteorites contain both crystalline structures and opaque mantle
rock
list common ways collectors display pieces of meteorites.
Answer:
cookie
Explanation:
Please help. to find these
Answer:
Velocity ratio & input work
Explanation:
If u input velocity u can work the ratio...;D ;D ;D xD
3. A wave is traveling with a period of 5 seconds. What is the frequency of the wave?
Answer:
0.2 Hz
Explanation:
f= 1/T where f= frequency and T=period
f= 1/5 sec
=0.2 Hz
Answer:
.2
Explanation:
starting from rest, a car accelerates to 45 m/s in 1 minute. what is the average acceleration of the car in m/s^2 ?
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
What is the velocity ratio of a pulley used to raise a flag up its pole if the distance traveled by the flag is 10m and the distance traveled by the rope is 50m?
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
Please for the love of humanity please answer this question and my other question...
Answer:
It's "C"
Explanation:
Friction slows things down.
"Friction always slows a moving object down. The amount of friction depends on the materials from which the two surfaces are made. The rougher the surface, the more friction is produced. Friction also produces heat. "
pllssss answer thiss ...
its about the reading of VOLTMETER AND AMMETER
Answer:
The answer is C 1.8V and 0.38A
PLEASE HELP: Use Newton’s second law of motion to determine the unknown values for the following objects in motion. Assume all objects are being accelerated on frictionless surfaces or through frictionless mediums. Calculate the values, and round your answer to the correct number of significant digits. If needed, use the conversion factor 1 lb = .454 kg.
Baseball data: 0.142 kg, 1._________N, 388 m/s2
Football player data: 0.426 m/s2 , 2._________kg, 28.39 N of force pushing the player over the goal line, and 1.98 N of force by defender pushing in the opposite direction
Wagon data: 77.6 lbs,128 N, 3.___________m/s2
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.
What is force?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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Which of the following changes to Earth's atmosphere would increase the greenhouse effect
Select all that apply.
increasing the concentration of CO2
increasing the number of N, molecules
decreasing the concentration of CH4
decreasing the amount of water vapor
Answer:Increasing the concentration of CO2
Explanation:
I might be wrong, don't try so sorry if i'm wrong!
The changes to the Earth's atmosphere would increase the greenhouse effect and it is caused by
increasing the concentration of CO2increasing the number of N, molecules.What is Green house effect?Green house effect refers to different release of greenhouse gases like co2 to the atmosphere in large quantities therefore affection the atmosphere and ozone layer leading to the release of dangerous radiations.
Therefore, The changes to the Earth's atmosphere would increase the greenhouse effect and it is caused by
increasing the concentration of CO2increasing the number of N, moleculesLearn more about greenhouse effect below.
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can someone pls help me?!!!! i need it asap!! i’m very stressed
Answer:
Acceleration
Explanation:
Its speed or velocity change
Click to review the online content. Then answer the question(s) below, using complete sentences. Scroll down to view additional questions.
Online Content: Site 1
Fitness Log
Name each of the five steps in the PRICE treatment. (Site 1)
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!
Mercury is the plant from the sun
A platinan bar measure 5.0cm long, 40cm
wide and 1.5 cm thick. if has a mass of 700.0grams.
Calculate the volume of platinum bar.
I need help :( Plz help me
Answer:
that is what I got for my answer
Explanation:
I Calculate it and I got 1600
The distance a toy car travels over time is shown in the graph.
Which table best shows the average speed of the toy car at different time intervals?
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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PLZ HELP!!! the moon umbriel orbits uranus (mass = 8.68 x 10^25 kg) at a distance of 2.66 x 10^8 m. what is umbriels orbital speed? (In hours)
Answer:
99.48
Explanation:
99.48
Which statement correctly describes the charge of the nucleus and the charge of the electron cloud of an atom?
Answer:
This question is incomplete
Explanation:
This question is incomplete because of the absence of options. However, the charge of a nucleus was discovered by Ernest Rutherford. The nucleus is located in the centre of an atom and it contains protons and neutrons. The protons are positively charged while the neutrons have no charge, thus the charge of the nucleus is positive because the neutrality of the neutron does not affect the charge of the proton.
The charge of an electron was first measured by Robert Millikan. Electrons are negatively charged subatomic particles that balance out the positive charge of the protons.