Answer:
Nobody knows...
Explanation:
the height has a distance of 2.5 seconds to hit the ground what is gravity?
Answer:
11 times
Explanatiom:
756 fourty
velocity is vector quantity but speed is scalor quantity . why ?
speed speed scalar quantity is the rate of at which an object covers distance on the other hand velocity is a vector quantity it is direction aware.velocity is the rate at which the position changes.the average velocity is the displacement or position change Per time ratio.so velocity is a vector quantity but speed is a scalar quantity
How can you tell is energy has been transferred or transformed
Answer:
In mY Knowledge
Energy transfer is the movement of energy from one location to another. Energy transformation is when energy changes from one type to another. While energy can be transferred or transformed, the total energy always remains the same.
Hope iT HeLps :D
Answer:
You can tell if energy has been transferred when something works when you put a body of energy in it. For example, you'll know when energy is transferred if you plug a lamp cord into an electric socket and the lamp turns on. Energy is being transferred from the socket to the lamp.
You can tell when energy is being transformed when it changes from one energy to another. You can know when energy is being transformed when you turn on a stove. Chemical energy transforms into electric energy.
I hope that helps!
If it is correct, may I be brainliest?
In which application is a magnet used to store information?
A. The needle on a compass
B. A recycling-center separator
C. The clasp on a necklace
D. The disk in a computer hard drive
Answer:
d the disk in a computer hard drive
Explanation:
because hard drive use magnetic memory tostore giga- and terabytes of data in computer.
The disk in a computer hard drive is an application that uses magnets to store information.
What are magnets?Magnets are materials which are produce magnetic properties and make use of magnetic fields.
Magnets are used on various appliances such as speakers, microphones, computer hard disks, electromagnets, etc.
Hard disks make use of the magnetic properties of magnets to store information.
Therefore, the disk in a computer hard drive is an application that uses magnets to store information.
Learn more about magnets at: https://brainly.com/question/16236550
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During a goal-line stand, a 112-kg fullback moving eastward with a speed of 6 m/s
collides head-on with a 120-kg lineman moving westward with a speed of 8 m/s.
The two players collide and stick together, moving at the same velocity after the
collision. Determine the post-collision velocity of the two players.
Answer:
-1.24 m/s
Explanation:
Total momentum before collision = total momentum after collision
Total momentum before collision = (mass of full back * velocity of fullback) + (mass of lineman * velocity of line man).
Mass of full back = 112 kg, mass of line bag = 120 kg, velocity of full back 6 m/s (east), velocity of line back = -8 m/s (west). Hence:
Total momentum before collision = (112 * 6) + (120 * -8) = 672 - 960 = -288 kgm/s
The total momentum after collision = (mass of full back + mass of line back) * velocity after collision.
Let velocity after collision be v, hence:
The total momentum after collision = (112 + 120)v = 232v
Total momentum before collision = total momentum after collision
-288 = 232v
v = -288 / 232
v = -1.24 m/s
Therefore after collision, the two players would move at a velocity 1.24 m/s west (the same direction as the lineman).
A planet's rotation determines the length of its day and its revolution determines the length of its year. A day on Earth is 24 hours and a year on Earth is 365 days. In contrast to Earth, a day on Venus is longer than a year on Venus. Which is the best reason for why this is so?
Explanation:
The speed of rotation of Venus is slower than that of Earth that is why a day on Venus is longerthan Earth's day. Whereas, Venus is closer to sun than Earth, this means Venus trajectory of revolution is smaller than that of Earth.Therefore, a year on Venus is shorter than Earth's year.
The histogram shows final exam scores, and the table shows letter grades for each range of scores. A passing grade is 60% or higher.
A 90–100%
B 80–90%
C 70–80%
D 60–70%
Which statement is supported by the data in the histogram?
A. Twenty students received As and Bs.
B. Forty students received scores between 40% and 60%.
C. Most students received As and Bs.
D. Most students passed the final exam.
Answer:
D
Explanation:
Edg2020
Match the information below with the type of energy it can be used to calculate.
Words to fill the blanks:
1.
Potential Energy
2.
Kinetic Energy
3.
Both Potential and Kinetic Energy
Answer:
Explanation:
Mass - 3
Height - 1
Gravity - 1
Velocity - 2
Potential Energy: mgh
Kinetic Energy: 1/2mv^2
Twins Jody and Taylor are rearranging the furniture in their bedroom and want to move a dresser across the room. The dresser has a sliding force of 90N. Jody can push with a force of 55N and Taylor can push with a force of 38N. What is the Net Force? Can the twins move the dresser across the room? Explain why in complete sentences and show all math work to support your answer.
Plz help this is due in 5 days ;-;
Answer:
yes, They will be able to move the dresser.
Explanation:
sliding force 90N
55N + 38N = 93N
therefore, yes the twins can move the dresser
Dave runs a 400 m race with a speed of 4 m/s. What time will it take him to finish the
race?
Answer:
The answer should be 100 if not try 200
Explanation:
d=v x t
400m=4m/s x t
/4 /4
100=t
An applied force of 20 N accelerates a block across a level,frictionless surface from rest to a velocity of 8.0 m/s in a time of 2.5 s. Calculate the work done by this force.
Answer:
workdone = force × distanceExplanation:
let's find the acceleration
[tex]v = u + at \\ 8 = 0 \times a \times 2.5 \\ \alpha = 3.2m {s}^{ - 2} [/tex]
then distance
[tex] {v}^{2} = {u}^{2} + 2as \\ {8}^{2} = 2 \times 3.2 \times s \\ \\ s = 10m [/tex]
w = f ×d = 20 × 10 = 200JIdentify two factors that increase the electric force between objects
Answer: The distance between particles, and the amount of electric charge they carry.
Explanation:
Charles Coulomb wanted to figure out the strength of the force between two objects and these were the two most independent factors.
What causes seasons to occur?
A) The revolution of the moon around the earth
B) The rotation of the moon around the Earth
C) The Earths tilt on its axis.
D) The moons tilt on its axis.
Answer:
C
Explanation:
I believe that it's C
What is championship game of baseball called? The World Series The Super Bowl The World Cup
Answer:
The World Series
Explanation:
The Super Bowl is the championship American Football game, and the World Cup is the Soccer/Football game.
American Football and Football are different things. The first is what Americans call football, while the other is what Americans call soccer. It is confusing.
3. Electrons are the only part of an atom that can be transferred between materials. True or
False?
Answer:
True
Explanation:
Electrons can be transferred between materials as in chemical reactions solid substances lose electrons while other elements gain electrons to balance the electrons in reaction.It occurs by conduction,polarization and friction.
why is it possible for iron ships to float o water,but needles sink when dropped in water
Explanation:
Needles sinks in water due to the more density of needles than the density of water. But ship is made hollow and contains air. So it's average density Is less than that of water. It displaces the liquid of it's own weight causing the ship to float on water.
So, it it possible for iron ships to float on water,but needles sink when dropped in water.
Hope it will help :)❤
A satellite moves at a constant speed in a circular orbit about the Earth. Which pair of statements about momentum and kinetic energy are correct.
Answer:
The momentum and the kinetic energy remains constant.
Explanation:
A uniform circular motion is defined as the motion of a body which moves in a constant speed or at the same speed during the motion.
In the context, it is given that a satellite is moving around the earth in a circular orbit at a constant speed. The satellite has certain momentum as well as energy.
We can conclude that the kinetic energy and the momentum of the satellite remains constant as the momentum and kinetic energy depends on the speed of an object And here the speed of the satellite is constant, so the moment as well as the kinetic energy of the satellite remains constant while moving in a circular path.
Why should a person warm up before physical activity?
Answer:
don't wanna pull anything
Explanation:
A good warm-up before a workout dilates your blood vessels, ensuring that your muscles are well supplied with oxygen. It also raises your muscles' temperature for optimal flexibility and efficiency. By slowly raising your heart rate, the warm-up also helps minimize stress on your heart.
Answer:
Here you go!
Explanation:
A good warm-up before a workout dilates your blood vessels, ensuring that your muscles are well supplied with oxygen. It also raises your muscles' temperature for optimal flexibility and efficiency. By slowly raising your heart rate, the warm-up also helps minimize stress on your heart. “Stretching allows for greater range of motion and eases the stress on the joints and tendons, which could potentially prevent injury. Warming up, such as low-heart rate cardio, prepares the circulatory and respiratory system for the upcoming ‘age- and type-appropriate target heart rate’ exercising, whether it’s endurance or sprint type of activities.” The cool-down is just as critical. It keeps the blood flowing throughout the body. Stopping suddenly can cause light-headedness because your heart rate and blood pressure drop rapidly. Before you exercise, think about warming up your muscles like you would warm up your car. It increases the temperature and flexibility of your muscles, and helps you be more efficient and safer during your workout. A warm-up before moderate- or vigorous-intensity aerobic activity allows a gradual increase in heart rate and breathing at the start of the activity.
Tips:
*Warm up for 5 to 10 minutes. The more intense the activity, the longer the warm-up.
*Do whatever activity you plan on doing (running, walking, cycling, etc.) at a slower pace (jog, walk slowly).
*Use your entire body. For many people, walking on a treadmill and doing some modified bent-knee push-ups will suffice.
The bouncing back of a ray of light , sound , or heat when the ray hits a surface that it does not penetrate
A . Refraction
B . Reflection
C. Resonance
D. Standing Wave
Answer:
B. reflection
Explanation:
Have a good day! :)
The bouncing back of a ray of light, sound, or heat when the ray hits a surface that it does not penetrate is called a reflection, so option B is correct.
What is Reflection?Reflection is the abrupt change in a wave's propagation direction when it encounters a boundary between two media. The approaching wave disturbance is still present in the same medium, at least in part. At plane borders, reflection happens regularly and follows a straightforward law.
Angles of incidence (between the oncoming wave's direction of motion and a perpendicular to the reflecting surface) are identical to angles between the reflected wave's direction of motion and a perpendicular (angle of reflection). Diffuse reflection occurs at uneven or irregular boundaries. The percentage of the wave's energy that is reflected by a surface material is known as its reflectivity.
Therefore, the bouncing back of a ray of light, sound, or heat when the ray hits a surface that it does not penetrate is called a reflection.
To know more about Reflection:
https://brainly.com/question/2254222
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High- and low-pressure areas leading to air movement happen when there are differences in which factor?
clouds
density
atmosphere
precipitation
whoever gets the answer will get brainliest!! :D
Answer:
The answer is density
Explanation:
They density of the air is what makes a difference.
HELP!!
8. The speed that the car is going at an instant of time is called the (5 points)
average speed
final speed
initial speed
instantaneous speed
Answer:
the speed that the car is going at an instant of time is called the instantaneous speed.
Which of the following are not correctly balanced reactions?
Check all that apply.
A. C + Cl2 → CC14
OB. 2K + Br2 + 2KBr
O C. Mg + FeO →2Fe + Mgo
D. C + 02 → CO2
Answer:
B. 2K + Br2 + 2KBr
D. C + 02 → CO2
Explanation:
In balancing a chemical reaction, the number of atoms on both sides of the expression must be the same in order to obey the law of conservation of mass.
According to the law of conservation of mass, in a chemical reaction, matter is neither created nor destroyed.
So, let us investigate:
Number of atoms
Reactants Products
K 2 2
Br 2 2
C + 0₂ → CO₂
C 1 1
O₂ 2 2
We see that for both equations, the number of atoms on both sides of the expression is the same.
Johanna is studying what happens to the energy as a ball rolls down a ramp. What is one form of energy that she is studying? gravitational potential energy electrical energy chemical energy elastic potential energy
Answer: gravitational potential energy
Explanation:
Gravitational potential energy is refered to as the potential energy that an object has due to its gravitational field, which in turn is being turned into a kinetic energy when there is a fall of such objects.
Since Johanna is studying what happens to the energy as a ball rolls down a ramp, the form of energy here is the gravitational potential energy.
Answer:
the answer is A
Explanation:
gravitational potential energy
Help please this is worth 30% of my grade in total
Answer:
D. Both are held together by gravitational forces
Explanation:
The common features in galaxies are;
Gravity holds the stars togetherThe dense region in a galaxy is the centerThey all have a faint outer region and mysterious dark matter haloThey all have stars, planets, asteroids, galactic cloudI NEED HELP ASAP IM ON TIMER !!!!!!!!
Average speed and average velocity are always the same.
Please select the best answer from the choices provided
T
F
Average speed and average velocity are always the same.
Please select the best answer from the choices provided
T
F
Answer:
F
Explanation:
The average velocity is the ratio of total displacement and time.The average speed is the ratio of total distance and time.Therefore the average speed and average velocity are equal if the total displacement is equal to the total distance that is if the body travels along a straight line without changing the direction.
715 J of heat are transferred from
a 1.30 kg aluminum block to a
0.800 kg iron block. Find the
temperature change for the
aluminum
Aluminum
Iron or steel
c = 900 J/(kg*c)
c = 452 J/(kg"C)
(Unit = degrees C)
Answer:0.61
Explanation:
the answer is 0.61 because i just typed it into acellus abs it was right
A circuit contains two 1.5 volt battery and a bulb with a resistance of 3 ohms. Calculate the current
Answer:
The current is 1 A
Explanation:
Current in a Series Connection
When two or more elements are connected in series, all of them have the same current, and the sum of their individual voltages is the total voltage applied to the circuit.
According to Ohm's law:
V=R.I
Where V is the voltage, R is the resistance and I is the current of a circuit.
We have a voltage of V=1.5 V + 1.5 V = 3 V and a resistance of R=3 ohms.
We can calculate the current by solving for I:
[tex]\displaystyle I=\frac{V}{R}=\frac{3}{3}=1\ A[/tex]
The current is 1 A
A 55.0 kg person, having a density of
1010 kg/m3, is underwater. What is the
buoyant force acting on the person?
[?]N
Pwater = 1,000 kg/m3
Answer:
534.7
Explanation:
55/1010 = 0.0545m^3
1000(0.0545)(9.81) = 534.7 N (kept at 4 sig figs)
If you want to make a flashlight and have two batteries and a light bulb how would you hook them up to make it bright and why?
Answer:
The positive end of battery 1 touching the negative end of battery 2 and wires connecting the negative of battery 1 to the light light bulb and the positive of battery 2 to the light bulb.
Explanation:
Which two types of potential energies would be types of mechanical energies? electrical and kinetic nuclear and chemical radiant and thermal elastic and gravitational
The two types of potential energies that would be types of mechanical energies are:
thermal elastic energy and gravitational energy.What is potential energy?The term potential energy is the energy possessed by a body by virtue of its position. It is different from kinetic energy which is due to the state of motion of a body.
The two types of potential energies that would be types of mechanical energies are;
thermal elastic and gravitational energy.Learn more about mechanical energy: https://brainly.com/question/1932868
Answer: D - elastic and gravitational
Explanation: Edge 2023