Answer:
9000 m/s
Explanation:
A=Fm
Acceleration = Force x Mass(Newtons)
If Runner A ran 1 mile in 7 minutes and Runner B ran 1 mile in 5 minutes, who ran at a faster speed.
Answer:
B
Explanation:
ran a mile 2 minutes faster
640 nanometer setara dengan
Answer:
640 nanometer setara dengan 6.4e-7 meter
Molly does not have many activities after school, so she has plenty of time to exercise. She has never been very athletic and plans to start by exercising two hours a day five days a week. Is this a good plan?
OPTIONS:
A.
Yes, she should dive right in.
B.
No, no one can exercise that much.
C.
Yes, if she has the time there is no excuse.
D.
No, smaller goals would be better.
PLEASE NO LINKS
ultraviolet light destroys which vitamin essential for cell division?
Answer:
Both Vitamin D and folate level are affected by UV radiation from sunlight.
Explanation:
At a race car driving event, a staff member notices that the skid marks left by the race car are
10.99 m long as it comes to a stop. The very experienced staff member knows that the
deceleration of a car when skidding is -42.61 m/s2. What can the staff member estimate for
the original speed of the race car if it came to a stop during the skid?
A car that experiences a deceleration of -41.62 m/s² and comes to a stop after 10.99 m has an initial velocity of 30.60 m/s.
A car experiences a deceleration (a) of -41.62 m/s² and comes to a stop (final velocity = v = 0 m/s) after 10.99 m (s).
We can calculate the initial velocity of the car (u) using the following kinematic equation.
[tex]v^{2} = u^{2} + 2as\\\\u = \sqrt[]{v^{2}-2as} = \sqrt[]{(0m/s)^{2}-2(-42.61m/s^{2} )(10.99m)} = 30.60m/s[/tex]
A car that experiences a deceleration of -41.62 m/s² and comes to a stop after 10.99 m has an initial velocity of 30.60 m/s.
Learn more: https://brainly.com/question/14851168
5) Find the length of guitar string that would vibrate at a fundamental frequency of 825 Hz if the string is stretched so that the velocity of waves on the string is 580 m/s?
Áp dụng công thức tính độ dài ạ
To hit a fish that he sees beneath the water, where should he aim?
Ok I guess you are gonna use arrow/spear. Ok so what I learned is that the best place to hit and fish is the gills or the eye(s) because without the gills fish won't be able to breath.If you hit it on the eye it will take a while to kill the fish.The fish will feel lots of pain and start swim like crazy and probably go away.So i will say the BEST way to kill a fish to to hit it's gills.
In case you don't have any materials to kill fish:
IF you are in the wild with fish and you don't have a hook,spear,arrow, etc. I will recommend you to use a rock that his big but easy to grip.Hit the fish on top of its head just behind the eyes.Or get a stick no too thick or too skinny just like between those and start whittle it to a arrow then aim and shoot.
Hope this helps! =D
what's the relationship between magnetism and birds?
Answer:
can detect axis of magnetic field
Explanation:
Answer:
Birds can see the Earth’s magnetic fields. They just found out that this ability is the result of a special protein in the birds’ eyes.
Explanation:
un auto recorre 212 km en un tiempo de 3.1 h.Calcular su rapidez en m/s
Para hacerlo a m/s un método muy práctico es sólo dividir entre 3.6, por cuestiones de conversiones, lo puedes comprobar.
212 km/hr /3.6 = 58 m/s
Comprobación :
V= d / t
V= 212 m / 18000 seg <---- nota que aquí los segundos son de las 3.1hrs
V= 58 m/seg
What do "Newton's apple" and the moon have in common?
Answer:
Both these motions are caused by the Gravitational force of earth.
Explanation:
Both these motions are caused by the Gravitational force of earth.
A murder has been committed and you are a juror at the trial. The prosecuting attorney has presented evidence that the victim put up a struggle and injured her assailant, drawing blood, prior to her demise. Blood typing was completed and the blood type matches the defendant's blood type. The prosecuting attorney states that this evidence is proof that the defendant is guilty of murder. As a juror, do you think the defendant is guilty of murder based on this evidence? Why or why not? If not, what other evidence do you think is needed?
The fact that the blood type matches that of the defendant is no proof that the defendant is guilty as charged.
There are about four blood types that people can have, these blood types are; A, B, AB and O. Everybody must posses one of these blood types. A person's blood type is determined through laboratory tests.
The prosecuting attorney was wrong in concluding that the defendant is guilty as charged only based on the blood type evidence. different people could have the same blood type. Only DNA analysis can conclusively prove that the defendant is actually guilty as charged.
Learn more: https://brainly.com/question/1527403
Guide Questions:
1. What is the speed of sound at the lowest temperature? __________________
2. What is the speed of sound at the highest temperature? _________________
3. At which temperature the speed of sound slowest? _____________________
4. At which temperature the speed of sound fastest? _____________________
5. Does temperature affect the speed of sound? Explain ___________________
Answer:
1- 330.4m/s
2-358.0m/s
3- -1c
4- 45c
5- when temperature increase speed of sound will increase
1. The speed of sound at the lowest temperature in the image is 330.4 m/s.
2. The speed of sound at the highest temperature in the image is 358.0 m/s.
3. The temperature at which the speed of sound is slowest is -1°C.
4. The temperature at which the speed of sound is fastest is 45°C.
5. Yes, temperature affects the speed of sound.
The image shows the relationship between temperature and speed of sound in air. The x-axis of the graph shows the temperature in degrees Celsius, and the y-axis shows the speed of sound in meters per second. The line on the graph shows that the speed of sound increases with temperature. For every 1 degree Celsius increase in temperature, the speed of sound increases by about 0.6 m/s.
The speed of sound in air is also affected by other factors, such as humidity and air pressure. However, temperature is the most important factor affecting the speed of sound.
The speed of sound at the lowest temperature in the image is 330.4 m/s, which is at -1°C.
The speed of sound at the highest temperature in the image is 358.0 m/s, which is at 45°C.
The temperature at which the speed of sound is slowest is -1°C.
The temperature at which the speed of sound is fastest is 45°C.
Yes, temperature affects the speed of sound. The speed of sound increases with temperature. This is because the molecules of a medium vibrate faster at higher temperatures, and this allows sound waves to travel more quickly.
To know more about speed here
https://brainly.com/question/6280317
#SPJ3
what observations about disks of dusty material around young stars suggest that planets may be forming in such disks?
Planets may be forming from dust disks because these disks are filled with completely empty lanes.
We can arrive at this answer because:
The existence of empty lanes allows the dust disks to transform into many different materials, including new planets.In this case, there is a cooling of the dust disk, which cools more and more over time.This cooling causes all the particles in that disk to clot.Coagulation increases the density of the particles and if they are dense enough they can form escape accretions.Escape accretions allow for the formation of planetary embryos, which may form planets in the future.
More information:
https://brainly.com/question/12286734?referrer=searchResults
I WILL CROWN THE BRAINLIEST IF YOU ANSWER CORRECT
ELECTROMAGNET WAVES
Travel through what?
Carry energy, often called what?
Emitted by what?
Three Examples of electromagnetic waves.
Answer:
Electromagnetic waves differ from mechanical waves in that they do not require a medium to propagate. This means that electromagnetic waves can travel not only through air and solid materials, but also through the vacuum of space.
Example: Radio waves, microwaves, visible light, and x rays
Therese plays lacrosse, but she has injured her ankle and has to take a few weeks off. She is finding that she has a lot of trouble sleeping since she is no longer practicing several days a week. What BEST explains this?
OPTIONS:
A.
She needs regular exercise to move oxygen through the blood.
B.
She clearly requires more exercise than most people to relieve stress.
C.
She is not releasing the endorphins that she used to, and that impacts her sleep.
D.
She is likely not maintaining the healthy habits that she did when she was practicing.
PLEASE NO LINKS
Answer:
C. She is not releasing the endorphins that she used to, and that impacts her sleep.
Explanation:
The best explanation for why Therese is having trouble sleeping is that she is not releasing the endorphins that she used to, and that impacts her sleep.
Hence, the correct option is C.
Endorphins are hormones that are released during exercise. They have mood-boosting and pain-relieving effects. When Therese stops exercising, she is no longer releasing as many endorphins, which can lead to moodiness and difficulty sleeping.
Option A is incorrect because exercise does not directly move oxygen through the blood. Instead, it increases the heart rate and breathing rate, which in turn increases the amount of oxygen that is delivered to the tissues.
Option B is incorrect because there is no evidence to suggest that Therese requires more exercise than most people to relieve stress. In fact, most people find that regular exercise can help to reduce stress levels.
Option D is incorrect because it is unlikely that Therese is not maintaining the healthy habits that she did when she was practicing. Lacrosse is a physically demanding sport, so it is likely that Therese is still eating healthy and getting enough sleep.
Therefore, the best explanation for why Therese is having trouble sleeping is that she is not releasing the endorphins that she used to, and that impacts her sleep.
Hence, the correct option is C.
To know more about endorphins here
https://brainly.com/question/30191658
#SPJ3
Which statement is true about vectors?
Vectors need direction and magnitude to exist, otherwise, it becomes scalars that do not require direction to be expressed.
eg - Velocity is a vector as it needs direction, but speed is scalar and does not need direction
hope this helps
Answer:
a. All quantities in physics are not vectors. b. A vector may have either magnitude or direction. c. The vector's length should be proportional to its magnitude. d. Two vectors can be added only if they have the same direction.
The atomic mass of sodium is 0.0230 kg/mole. How many moles are in 1.59 kg of sodium?
[tex]\\ \sf\longmapsto No\;of\:moles=\dfrac{Given\:mass}{Atomic\:mass}[/tex]
[tex]\\ \sf\longmapsto No\:of\:moles=\dfrac{1.59}{0.0230}[/tex]
[tex]\\ \sf\longmapsto No\:of\:moles=69.13moles[/tex]
in addition to studies of the body system of corals what studies in earth science might increased scientists understanding of an ability to predict coral bleaching
Answer: they could get a piece of the coral and run tests on it
Explanation:
An engineer is designing the foundation of large building and wants to be sure that movement in the ground will do as little damage to the building as possible. Which building material would be best to use in the foundation?
Steel-reinforced concrete is a better material for foundation where movement in the ground is envisaged.
The kind of material used for the foundation of a building greatly impacts the ability of that building to cope with movements in the ground such as during earthquakes.
For instance, when the foundation is made of brick or concrete which has a low ductility, these materials are incapable of absorbing a lot of energy. However, steel-reinforced concrete is a better material for foundation where movement in the ground is envisaged.
Learn more: https://brainly.com/question/1527403
3. Explain what forces the Egyptians had to overcome when building the pyramids
Answer:
(Hope this helps can I pls have brainlist (crown)☺️)
Explanation:
But how did the Egyptians overcome the extreme friction of dragging such massive things through the sandy desert, some of which weighed more than 9,000 pounds? Researchers at the University of Amsterdam have come up with a very simple solution to the friction problem: they utilised water.
The pyramids were not built by slaves, contrary to common perception. Archaeologists discovered the ruins of a purpose-built town for the hundreds of labourers who constructed the renowned Giza pyramids about 4,500 years ago.
The Egyptians had to overcome the force of friction while dragging the big blocks of stone and the force of gravity while uplifting the large stone structure to a greater height when building the pyramids.
What is friction?Friction is a type of force that resists or prevents the relative motion of two physical objects when their surfaces come in contact.
The friction force prevents any two surfaces of objects from easily sliding over each other or slipping across one another. It depends upon the force applied to the object.
Thus, while constructing the pyramids, the Egyptians had to fight against the forces of gravity and friction as they lifted the massive stone edifice to a greater height.
Learn more about friction from here, link is given below,
brainly.com/question/24186853
#SPJ2
A spanner is used to undo a nut. The spanner has already turned 30° from the horizontal. A vertical force of 50 N is applied 0.3 m from the centre of the nut. Calculate the turning effect of the force, please show the calculation thank you :)
Answer:
19.4Nm..............
1. A sailboat accelerates uniformly from 3.0 m/s to 12.0 m/s at a rate of 1.5 m/s2. What distance does the boat travel?
Answer:
45 m
Explanation:
Use the equations of motion.
We know that:
S= the unknown
U=3 m/s
V=12 m/s
A=1.5 m/s
T= we won't need it
The equation used: [tex]v^2=u^2+2as[/tex]
Subsitute the values: [tex]12^2=3^2+2*1.5*s\\[/tex]
Solve the equation:
[tex]144=9+3s[/tex]
[tex]135=3s[/tex]
[tex]s=45 m[/tex]
Which does not take the direction of the motion into account?
Displacement
Distance
velocity
Velocity and displacement take direction of motion into account while distance does not take direction of motion into account.
Vector quantities take into account both magnitude and direction of motion while scalar quantities only take the magnitude of motion into account. In describing the motion of an object, we use terms such as; velocity, distance, displacement etc.
Looking at the options provided in the question, displacement and velocity are vectors hence they take the direction of motion into account. Distance is a scalar quantity hence it does not take direction of motion into account.
Learn more: https://brainly.com/question/1527403
Andy took a bus and then walked from his home to downtown. For the first 1.6 hour, the bus drove at an average speed of (15km)/(h). For the next 0.4 hours, he walked at an average speed of (4.5km)/(h). What was the average speed for the whole journey?
Answer:
240
Explanation:
cho mạch như hình vẽ E
=
24
V
,
r
=
1
Ω
,
R
1
=
3
Ω
,
R
2
=
R
3
=
R
4
=
6
Ω
Answer:
A
Explanation:
a car is running with the velocity of 72km/h. what will be its velocity after 5s if its acceleration is -2m/s2 ?
Answer:
36 km / hr
Explanation:
velocity final = velocity initial + accel * time
20 m/s + (-2)*5 ( 20 m/s = 72 km/hr)
10 m/s ( or 36 km/hr)
DOUBLE POINTS!!!!
1. If there are two objects of equal size but object A is heavier than object B, which statement is TRUE according to Newton’s second law of physics?
A.
Object A will require less force to be set in motion and will travel faster.
B.
Object B will require less force to be set in motion and will travel faster.
C.
Object A will require more force to be set in motion but will travel faster than object B.
D.
Object B will require more force to be set in motion but will travel faster than object A.
2. For athletes, a focus on body mechanics improves the effectiveness of their efforts.
A.
True
B.
False
The answers are 1. According to Newton's second law, object A, being heavier, requires more force to be set in motion and will travel faster than object B. The correct answer is options C. and 2. Focusing on body mechanics is important for athletes as it improves their effectiveness, and technique, and reduces the risk of injury is a true statement.
1. According to Newton’s second law of physics, if there are two objects of equal size but object A is heavier than object B, then the statement that is true is option C: Object A will require more force to be set in motion but will travel faster than object B. Newton's second law of motion states that acceleration is directly proportional to the force applied and inversely proportional to the object's mass. Since both objects are of equal size but object A is heavier, it will require more force to be set in motion. However, once in motion, it will have more inertia and travel faster than object B.2. The statement "For athletes, a focus on body mechanics improves the effectiveness of their efforts" is True. Body mechanics refers to the way in which the body moves and maintains balance while performing a physical task. Athletes need to have proper body mechanics to achieve maximum efficiency and reduce the risk of injury. By focusing on their body mechanics, athletes can improve their technique, reduce unnecessary movements, and improve their overall performance. Good body mechanics can also help to prevent injury and reduce wear and tear on the body. Therefore, a focus on body mechanics is essential for athletes to maximize their performance while minimizing their risk of injury. In summary, Newton's second law states that a heavier object requires more force to be set in motion, while a focus on body mechanics can improve the effectiveness of athletes' efforts.For more questions on Newton's second law
https://brainly.com/question/25545050
#SPJ8
Can somebody explain to me what’s 1/d^2 in electric force? And how do I graph it versus a force?
Answer:
so basically what you gotta do is, and then you can do that but you shouldn't do this
why does lowered air pressure allow water to boil at room temperature
Answer:
As ambient air pressure decreases, molecules evaporating from a boiling liquid meet less resistance from air molecules and enter the air more easily. Because the vapor pressure can be reduced, the temperature needed to boil the liquid is also reduced.
Explanation:
Answer:
Less force pushes down on the liquid, making it easier for gas to escape.
Explanation:
I hope this helps and have a great day!
In a salt solution, salt is a solute. why
Answer: Because it can dissolve in water
Explanation: Logic
