energy
Potential energy + Kinetic energy
OA) Heat
OB) Chemical
Electrical
OD) Mechanical
A planned high-speed train between Houston and Dallas will travel a distance of 386 kilometers in 5.40 × 10^3 seconds. What is the average speed of this train?
¡Hellow!
For this problem, first, lets convert the seconds in hours:
5,4x10³[tex]\rightarrow[/tex] 5400
h = sec / 3600
h = 5400 s / 3600
h = 1,5
Let's recabe information:
d (Distance) = 386 km
t (Time) = 1,5 h
v (Velocity) = ?
For calculate velocity, let's applicate formula:
[tex]\boxed{\boxed{\textbf{d = v * t} } }[/tex]
Reeplace according we information:
386 km = v * 1,5 h
v = 386 km / 1,5 h
v = 257,33 km/h
The velocity of the train is of 257,33 kilometers for hour.
Extra:
For convert km/h to m/s, we divide the velocity of km/h for 3,6:
m/s = km/h / 3,6
Let's reeplace:
m/s = 257,33 km/h / 3,6
m/s = 71,48
¿Good Luck?
A force of 6.0 N is applied horizontally to a 3.0 kg crate initially at rest on a horizontal frictionless surface. After the crate is pushed for 1.5 seconds, it has a gelocity of 3.0 m/s. Does this support Newton’s second law of motion, that force equals mass times acceleration?
A recipe for a casserole calls for 1 cup of milk. If a chef currently has 0.5 gallons of milk, how many casseroles can the chef make?
Answer:
The chef can make 8 casseroles
Explanation:
Units Conversion
We need to recall 1 gallon = 16 US cups.
A casserole needs 1 cup of milk, and the chef has 0.5 gallons of milk. Those 0.5 gallons are equivalent to 0.5*16 = 8 cups, thus the chef can make 8 casseroles.
PLEASE HELP IT IS URGENT! NET FORCE
A car traveling at 7 m/s accelerates at 2.5 m/s^2 to reach a speed of 12 m/s. How long does it take for this acceleration?
Answer:
1s
Explanation:
v=u+at
12=7+2.5t
t=12-7/5
t=1s
How does changing the force affect the sound?
Answer:
From a sound standpoint, higher tracking force reduces all other things being equal which might reduce the top end a bit and increase bass.
What are the two parts of an atom? the nucleus and the proton coud the neutron and the electron the neutron and the proton cloud the nucleus and the second 00
Answer: The Nucleus and the Electrons are the 2 Parts of the atom.
Explanation:
Pete is driving down 7th street. He drives 550 meters in 8 seconds. Assuming he does not
speed up or slow down, what is his speed in meters per second
Answer:
Speed = 68.75m/s
Explanation:
Speed can be defined as distance covered per unit time. Speed is a scalar quantity and as such it has magnitude but no direction.
Mathematically, speed is given by the equation;
[tex]Speed = \frac{distance}{time}[/tex]
[tex]S = \frac{d}{t}[/tex]
Given the following data;
Distance = 550m
Time = 8secs
Substituting into the above equation;
[tex]S = \frac{550}{8}[/tex]
Speed, S = 68.75m/s
Pls help
Tarnish is produced by a redox reaction that occurs when a metal reacts with a nonmetallic compound. The black tarnish on a silver dish might be produced by a reaction between silver and hydrogen sulfide. What occurs during this reaction?
A. Silver atoms lose electrons to sulfur atoms.
B. Silver atoms gain electrons from sulfur atoms.
C. A double-replacement reaction takes place
D. An acid-base reaction takes place.
Answer:
A. Silver atoms lose electrons to sulfur atoms
Explanation:
:p
Answer:
AA
Explanation:
The anther and filament are parts of a flower's:
stamen
petal
pistil
stigma
an antonym of lithium (Li) forms and an iconic bond with atom of chlorine CI to form lithium chloride. how are the valence electrons of these atoms rearranged to form this Bond ?
Li , which is located in group 1 of the periodic table, has one valence electron.
Chlorine, which is in group 17 of the periodic table, has seven valence electrons.
When the two atoms bond, lithium will lose one electron and form the lithium cation, Li + .
Since it loses one electron 7-1 = 6, there will be 6 valence electrons.
3. An earthquake measures 3 on Richterscale:
(i)Would it be recorded by a seismograph ?
(ii)ls it likely to cause much damage ?
Answer:
Yes, it would be recorded by a seismograph. The earthquake with magnitude of 3 on Richter Scale is not likely to cause much damageI need help because I don’t understand that question
Which action describes the first step in both scientific investigation and technological design?
researching how solar panels work
identifying a need for a solar panel
communicating to the team that solar panels are easy to install
designing a solution by sketching a prototype for a solar panel
Answer:
The best answer would be D
Explanation:
This would be best because if you sketch about an object or thing you are making it can help you better picture what you are making or someone else therefore the answer is D
Answer:
Answer is D fs
Explanation:
*designing a solution by sketching a prototype for a solar panel*
What is hybridization plsssss help,i will give brainliest to de person who explains well
Answer: the process of an animal or plant breeding with an individual of another species or variety
Explanation:
there you go
Answer:
In chemistry, orbital hybridization (or hybridization) is the concept of mixing atomic orbitals into new hybrid orbitals (with different energies, shapes, etc., then the component atomic orbitals) suitable for the pairing of electrons to form chemical bonds in valence bond theory.
Explanation:
just copied it :|
Which of the following is an example of a properly written testable hypothesis? *
A people should taste this new health food and see whether it makes them stronger
B When dog owners don't feed their puppies Brand A food, the puppies do not grow properly
C If Frederico had added the leaves to the compost pile last year, he wouldn't have to organic fertilizer
D if it is dark, then an owl will find a mouse by the sound the mouse makes
Answer:
D. if it is dark, then an owl will find a mouse by the sound the mouse makes
what is Newton's second law?
F=mXa
a=F/m
m=F/a
All of the above
It should be the first one, F= mXa (F = m times a).
non examples of kinetic energy
Answer:
Anything that isn't moving
Why do you think history is often referred to as social science
Answer:
History is considered to be a hybrid of the humanities and social sciences. This is because it uses the tools and methods of both.
Help please and explain elaborately thanks in advanced
Answer:
So overall, motion and interference of matter are needed equally for friction, which is held together by the force of gravity. Without gravity, everything would have fly away in the universe, and the friction would not have exist. Hence, friction is dependent on gravity.
Elaborately means in a detailed and carefully arranged manner.
Explanation:
hope this helps!!!!
A 8 g of iron shot is added to a graduated cylinder containing 46 mL of water. The water level rises to the 49 mL mark, from this information, calculate the density of iron
Answer:
The answer is 2.67 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass of iron = 8 g
volume = final volume of water - initial volume of water
volume = 49 - 46 = 3 mL
We have
[tex]density = \frac{8}{3} \\ = 2.666666...[/tex]
We have the final answer as
2.67 g/mLHope this helps you
I NEED HELP!!!! THIS IS DUE TODAY OCT. 14, 2020 AT 11:59 PM!!!
Keisha has two large dogs and a small dog. The dogs like to play tug-the-rope together. Each of these three diagrams shows one way that the dogs play together with the rope. Look at each arrow and the number that goes with it. They show the direction and amount of force each dog exerts on the rope. There are three illustrations of two dogs pulling at a toy rope.
The left art should show two big dogs pulling on a rope toy each pulling with a force of 20N in the opposite direction. The middle art shows a big dog on left pulling to the left on the rope toy with a force of 20N and a little dog pulling to the right with a force of 12N. The right art shows the rope toy tied to a post, with both dogs pulling on different parts of the toy and in the same direction. One large dog pulls with a force of 20 N and the small dog pulls with a force of 12 N.
Explain whether the forces shown in each diagram are balanced or unbalanced. Use math-based evidence to support your claim for each diagram.
Answer:
The answer is unbalanced
Explanation:
Though cases like these are not really how the science will be used, they illustrate the principle.
If the left art shows two big dogs pulling on a rope toy each pulling with a force of 20N in the opposite direction. The middle art shows a big dog on left pulling to the left on the rope toy with a force of 20N and a little dog pulling to the right with a force of 12N. The right art shows the rope toy tied to a post, with both dogs pulling on different parts of the toy and in the same direction. One large dog pulls with a force of 20 N and the small dog pulls with a force of 12 N. The atomic theory has been of priceless value to chemists, but it has more than once happened in the history of science that a hypothesis, after having been useful in the discovery Present and the co-ordination of knowledge, has been aban- position doned and replaced by one more in harmony with later of the discoveries
The amount of force exerted in each direction in the rope determines if the force in play is balanced or unbalanced ;
Left art : 20N = 20N (Balanced) Middle : 20N > 12N (Unbalanced) Right art : 20N > 12N (Unbalanced)To determine if the force acting in two direction is balanced or unbalanced, we calculate the net force acting on the object.
The net force = Force 1 - Force 2If the netforce = 0 ; then the force is balanced, if otherwise , then it is unbalanced.
Left art :
Net force = 20N - 20N = 0 NRight art :
20N - 12N = 8N (direction of the 20N force)Middle :
20N - 12N = 8N (direction of the 20N force)Therefore, the value of the net force determines if the force is balanced or not.
Learn more :https://brainly.com/question/14091327
A book with a mass of 1.5 kg rests on the edge of a desk 0.75 m above the
floor. Given that the acceleration due to gravity is 9.8 m/s2, what is the book's
potential energy?
apex
Answer:
11.03 J
Explanation:
did it on a p e x
Knowing that 1 inch is equal to 2.54 centimeters, convert 287 cm to inches.
Answer: 112.992
Explanation: If you divide 287 by 2.54, you will get 112.992125984. I just got rid of the five numbers after 992.
1 inch = 2.54 cm
?= 287 cm let, ? be (a)
cross multiply
2.54a= 1×287
a= 287/2.54
a= 112.992126
therefore 287 cm = 112.992126 inches.
[04.05] An atom has an atomic number of 12 and a mass number of 25. How many neutrons does the atom have?
Answer: is 13
Explanation:
A ninja applies a force of 1250-N to a piece of 4-inch solid oak with his fist. What is the size of
the force applied to the fist by the piece of oak?
Answer:
The force is 1250-N
Explanation:
Generally according to Newtons third law , which states that for every action there is an equal and opposite reaction
Now considering the question, the action here is the force applied by the ninja while the reaction is the force applied by the oak and from Newton law both of these action are equal but opposite to each other.
Hence the force applied by the the piece of oak on the fist is 1250 N
The boundary between areas of high and low pressure:
A Front
B Barometer
C Weather
D Air pressure
What's the time it takes a car to attain the speed of 30 m/s when accelerating from rest at 2 m/s (squared)
A- 15 s
B- 2 s
C- 60 s
D- 30 s
E- none
A boat sends a sound to the bottom of the ocean and it takes 3 seconds to return to the boat. How deep in the ocean? The speed of sound on water is 1500m/s.
Answer:
2,250 meters deep
Explanation:
If the time taken for the the signal to return to the boat means that it took 3 seconds for the signal to travel to and from the floor the same distance. That means it took 1.5 seconds to travel to the floor at a speed of 1500m/s means that it is 1500 multiplied by 1.5 to a distance of 2,250m. (Derived from the speed = distance divided by time formula to distance = speed multipled by time)