Answer:
b
Explanation:
A driver in a 500 kg car going 20 m/s sees a large box in the middle of the road 100 meters away. How much net force is required to get the car to stop without hitting the box?
WILL GIVE BRAINLY AND 50 POINTS
Answer:
620
Explanation:
Answer:
100
correct me if I am wrong
In a powder-flavored drink solution, which substance is the solvent?
a. glass
b. flavored powder
c. water
d. sugar
Answer:
c. Water
Explanation:
The solvent is the substance in which a solute is dissolved to make the solution.
In this case, the water is the solvent, the flavored powder is the solute, and the solution is the final drink.
Student is attempting to hit a target 4 meters from the edge of the desk that is 1.4 m tall marble rules of a table horizontally as shown below according to the above information in diagram what velocity must a marble have to strike the target?
Answer:
The correct option is;
7.49 m/s
Explanation:
The time it takes the marble to fall vertically is given by the equation
s = u·t + 1/2·g·t²
Where;
s = The height of the table = 1.4 m
u = The initial vertical velocity = 0 (The marble is given only an initial horizontal push (velocity))
g = The acceleration due to gravity = 9.81 m/s²
t = The time it takes the marble to reach the ground 1.4 m below
Plugging in the values. gives;
1.4 = 0×t + 1/2 × 9.81 × t²
∴ t² = 1.4/(1/2 × 9.81) ≈ 0.28542 s²
t = √0.28542 ≈ 0.5342s
The horizontal range the marble is to cover in the approximately 1.87 seconds before it reaches the ground = 4 meters
Therefore, the velocity that allows the marble to reach 4 meters in 1.87 seconds is give as follows;
Velocity = Distance/Time = 4 m/(0.5342 s) ≈ 7.49 m/s
Therefore the horizontal velocity the marble must have to strike its target is approximately 7.49 m/s.
During a game of marbles, a player is trying to win a 2 g marble that is at rest. The player flicks a 1.25 g marble at a velocity of 8 at the larger marble that is sitting still. After the collision, the smaller marble has a velocity of 1 . What is the velocity of the 2 g marble after the collision? Round your answer to the nearest whole number.
Answer:
4 m/s
Explanation:jus did on edgu 2020
How is the kinetic energy of the particles that make up a substance different
after it changes state?
A. The kinetic energy is greater after a substance changes from a
plasma to a gas.
B. The kinetic energy is less after a substance changes from a liquid
to a solid
C. The kinetic energy is greater after a substance changes from a
gas to a plasma.
D. The kinetic energy is less after a substance changes from a liquid
to a gas.
HELLPPPPPPP
Answer:
it is C. The kinetic energy is greater after a substance changes from a
gas to a plasma.
Explanation: The higher the temperature the higher the kinetic energy
pls vote for me
What is the density of a 15 g object that has a volume of 6 cm??
Answer:
2.5 g/cm³
Explanation:
To find density, divide the mass by the volume. In this case, 15 grams divided by 6 cm³ equals 2500 kg/m³, or simplified, 2.5 g/cm³. Hope it helps! To type ³, turn on Num Lock and then press Alt+0179. Have a good day!
What are 3 parts of daltons atomic theory ?
If there are 60 min in 1hr, and in 1min there are 60 sec; Solve the following problem using dimensional analysis.: 3,800 hrs. to seconds(sec)
How to raise the awareness water saving
Answer:Lead by an example
Practice what you preach. You'll never convince anyone to conserve water if you aren't doing it yourself.
Engage with others.
Seek out allies.
Give people a reason to save.
Provide entry-level strategies.
Encourage others to challenge themselves.
Think big.
Choose a monthly focus.
For all my breakdancers out there can you please tell me how to do a second windmill I can get one but I’m stuck there
Answer:
Explanation: To breakdance, ask a friend or a professional, surf the internet, or invent your own moves. You don't have to master other breakdancers' moves to be a breakdancer yourself. You breakdancing by ...
What a noncrystalline solid
Which two factors are used to calculate kinetic energy?
A The chemical formula for the object
B. The velocity of an object
c. The mass of an object
D. The height of an object
E . The density of an object
Answer:
B. The velocity of an object
c. The mass of an object
Explanation:
A closed system consists of a pendulum that is swinging back and forth. If
the pendulum's kinetic energy decreases, what else must happen to the
energy of the system?
a
A. Its gravitational potential energy must decrease.
B. Its total mechanical energy must increase.
O C. Its total mechanical energy must decrease.
O D. Its gravitational potential energy must increase.
Answer:
The correct choice is D. Its gravitational potential energy must increase
Explanation:
Conservation of Mechanical Energy
The total amount of mechanical energy, in a closed system in the absence of dissipative forces like friction or air resistance, remains constant.
This means that energy cannot disappear or appear and that potential energy can become kinetic energy or vice versa.
In a closed system like a pendulum, two types of energies are considered: Gravitational potential (U) and kinetic (K). Thus, the sum of both energies must remain constant in time.
Suppose the pendulum is at a state where U=150 J, and K=350 J. The total mechanical energy is:
M = 150 J + 350 J = 500 J
If the kinetic energy decreases to a new value, say K = 200 J, then the gravitational potential must increase to compensate for this new condition, that is: U = 300 J
The correct choice is D. Its gravitational potential energy must increase
Taking into account the definition of kinetic, potencial and mechanical energy, the correct answer is option D: If the pendulum's kinetic energy decreases Its gravitational potential energy must increase.
Kinetic energyKinetic energy is a form of energy. It is defined as the energy associated with bodies that are in motion and this energy depends on the mass and speed of the body.
Kinetic energy is defined as the amount of work necessary to accelerate a body of a given mass and at rest, until it reaches a given speed. Once this point is reached, the amount of accumulated kinetic energy will remain the same unless there is a change in speed or the body returns to its state of rest by applying a force.
Potential energyOn the other hand, potential energy is the energy that measures the ability of a system to perform work based on its position. In other words, this is the energy that a body has at a certain height above the ground.
Gravitational potential energy is the energy associated with the gravitational force. This will depend on the relative height of an object to some reference point, the mass, and the force of gravity.
Mechanical energyFinally, mechanical energy is that which a body or a system obtains as a result of the speed of its movement or its specific position, and which is capable of producing mechanical work. Then:
Potential energy + kinetic energy = total mechanical energy
The principle of conservation of mechanical energy indicates that the mechanical energy of a body remains constant when all the forces acting on it are conservative (a force is conservative when the work it does on a body depends only on the initial and final points and not the path taken to get from one to the other.)
Therefore, if the potential energy decreases, the kinetic energy will increase. In the same way, if the kinetics decreases, the potential energy will increase.
This caseThis principle can be applied in this case. The mechanical energy of the pendulum remains constant when all the forces acting on it are conservative.
So, the correct answer is option D: If the pendulum's kinetic energy decreases Its gravitational potential energy must increase.
Learn more about mechanical energy:
https://brainly.com/question/17809741?referrer=searchResultshttps://brainly.com/question/14567080?referrer=searchResultshttps://brainly.com/question/12784057?referrer=searchResultshttps://brainly.com/question/10188030?referrer=searchResultshttps://brainly.com/question/11962904?referrer=searchResultsAll atoms want to be like which group of atoms?
An inclined plane is 10.0 m long and 2.5 m high. What is the mechanical advantage?
Answer:
MA = 4
Explanation:
In order to solve this problem, we must use the definition of the ideal mechanical advantage, which tells us that it is equal to the relationship of the inclined distance over the height with respect to the level of the ground
MA = L / h
where:
MA = mechanical advantage
L = Length of the inclined plane = 10 [m]
h = elevation = 2.5 [m]
MA = 10/2.5
MA = 4
What are the two parts of an atom?
the nucleus and the proton cloud
the neutron and the electron cloud
the neutron and the proton cloud
the nucleus and the electron cloudWhen an atom that has no charge loses two electrons, it becomes a
positive ion.
negative ion.
positive isotope.
negative isotope.
Answer:
The two main components of an atom are the nucleus and the cloud of electrons
postive ion
Explanation:
your welcome !!
postive ion explation - When an atom that has no charge loses two electrons, it becomes a positive ion. negative ion. positive isotope. negative isotope When an atom that has no charge loses two electrons, it becomes a positive ion.
An electric current of 0.75 A passes through a circuit that has a resistance of 175 12. According to Ohm's law, what is the voltage of the circuit? O A. 176 V O B. 0.004 V O C. 233 V O D. 131 V
Answer:
15.34 i think
Explanation:
PLEASE HELP AND HURRRRY
A package is dropped from a plane flying at a constant speed. Neglecting air resistance, when the package hits the ground the horizontal location of the plane will....
A. Be behind the package
B. Depend on speed of package
C. Be directly over the package
D. Be in front of the package
Answer:
A. Be behind the package
An automobile was moving at 15 m/s and accelerated at 2 m/s2 for 10 s. Which of the following
was its final speed?
Answer:
35 m/s
Explanation:
i know all
If m=120kg and a=15m/s2, what is the force
Answer:
F= 1800N
Explanation:
the equation for force is F= ma
so plug in the numbers: F= (120)(15)
solve this to get F= 1800N
tip: don't forget to add the units when writing your answer :)
8) Find the X and Y component of 10degree vector that has 5N.
Answer:
Fx = 4.92 [N]
Fy = 0.868 [N]
Explanation:
Let's take the 10 degrees as a measure from the horizontal component to the vector.
Thus taking the components in the X & y axes respectively:
Fx = 5*cos(10) = 4.92 [N]
Fy = 5*sin(10) = 0.868 [N]
how would the surface tension of water be increased
Answer:
the presence of impurities on the surface of a substance directly affects the surface tension of a liquid
Explanation:
the surface tension of water will increase when highly soluble impurities are added
A line graph usually reveals a relationship between which factors
Answer:
variables on the horizontal and vertical axis (slope, outliers, +/- correlation, etc)
Explanation:
What are the Differences between ancient and modern astronomy?
Answer:
ancient astronomy is back in the 1600s and is really old and modern astronomy is present and astronomy today
Time period and technology are the main differences between ancient and modern astronomy.
The main differences between ancient and modern astronomy is the era in which they were created and developed. The ancient astronomy developed by Greeks and technology for study is very old. The first documented records of systematic astronomical observations occurs in Assyro-Babylonians around 1000 BCE.
While on the other hand, modern astronomy refers to the astronomy that is developed in this modern period and use advance technology. Modern astronomy includes many elements of the motions as well as characteristics of moving bodies so we can conclude that time period and technology are the main differences between ancient and modern astronomy.
Learn more: https://brainly.com/question/18659457
What is the difference between a fact witness and an expert witness?
Answer:
Unlike a fact witness, an expert is entitled to compensation for participation in the case. A key distinction between a fact witness and an expert witness is that an expert witness may provide an opinion. Fact witnesses must limit their testimony to facts in regard to evidence they may have observed or been involved.
Explanation:
there
Answer:
Unlike a fact witness, an expert is entitled to compensation for participation in the case. A key distinction between a fact witness and an expert witness is that an expert witness may provide an opinion. Fact witnesses must limit their testimony to facts in regard to evidence they may have observed or been involved.
Explanation:
E2020
What do you guys like about school
Answer:
umm.....the teachers and friends
The drama, and friends.
HEY CAN ANYONE PLS ANSWER DIS!!!!
Answer:
A) distillation.
Explanation:
Benzene boils at 81∘C while chloroform at about 61∘C. The separation can be done by distillation.
please mark me brainliest! hope this helps, god bless :)
2. True or false. As a wave travels through a given material its velocity changes.
Answer:
the answer is false
Explanation:
A wave travels at a constant velocity through a given material.
whats an astral projection
Answer:Esotericism
Explanation:
it’s something that’s in intentional out of body experience
Answer:
Astral projection is a term used in esotericism to describe an intentional out-of-body experience that assumes the existence of a soul or consciousness called an "astral body" that is separate from the physical body and capable of travelling outside it throughout the universe.
Explanation:
Silver has a resistance of 0.0198 ohms. What voltage would produce a current of 250 amps?
Answer:
V= I x R =250 x 0.0198 = 4.95 Volts
Explanation:
The voltage across the resistor is 4.95 Volts.
How do you calculate the voltage?Given that the resistance is 0.0198 ohms and the current flowing through the silver is 250 amps.
The voltage V across the resistor is the product of the current I flowing through the resistors and resistance R.
[tex]V = IR[/tex]
Substituting the values, we get the voltage.
[tex]V = 250 \times 0.0198[/tex]
[tex]V = 4.95 \;\rm V[/tex]
Hence we can conclude that the voltage across the resistor is 4.95 Volts.
To know more about the voltage, follow the link given below.
https://brainly.com/question/238298.