Answer:
The mass of the railroad car is 20,000 kg
Explanation:
Mechanical Force
According to the second Newton's law, the net force exerted by an external agent on an object of mass m is:
F = ma
Where:
a = acceleration of the object.
m = mass.
F = Net force
The railroad car undergoes an acceleration of [tex]a=2\ m/s^2[/tex] when a net force of F=40,000 N acts upon it.
It's required to find the mass of the railroad car, which can be done by solving the formula for m as follows:
[tex]\displaystyle m=\frac{F}{a}[/tex]
Substituting:
[tex]\displaystyle m=\frac{40,000}{2}=20,000[/tex]
The mass of the railroad car is 20,000 kg
A planet has two moons, Moon A and Moon B, that orbit at different distances from the planet's center, as shown. Astronomerscollect data regarding the planet, the two moons, and their obits. The astronomers are able to estimate the planet's radius and
mass.
The masses of the two moons are determined to be 2M for Moon A and M for Moon B. It is observed that the distance
between Moon B and the planet is two times that of the distance between Moon A and the planet. How does force exerted from
the planet on Moon A compare to the force exerted from the planet on Moon B?
READ CAREFULLY PLEASE
A) The gravitational force exerted from the planet on Moon A is two times larger than the gravitational force exerted from the planet on Moon B
B) The gravitational force exerted from the planet on Moon A is eight times larger than the gravitational force exerted from the planet on Moon B
C) The gravitational force exerted from the planet on Moon A is two times smaller than the gravitational force exerted from the planet on Moon B
D) The gravitational force exerted from the planet on Moon A is eight times smaller than the gravitational force exerted from the planet on Moon B
B) The gravitational force exerted from the planet on Moon A is eight times larger than the gravitational force exerted from the planet on Moon B
A wire of resistance 27 ohm is folded 3 times find its new resistance
Answer:
New resistance = 243 ohm
Explanation:
Given:
Current resistance = 27 ohm
Computation:
The wire is extended to three times its initial size, and its cross-section is therefore shortened to one-third of how it used to be. We found the current resistance to be 3x3= 9 times
So,
New resistance = 27 x 9
New resistance = 243 ohm
in a well water is filled up to the height of 6 meters.calculate the pressure given by the water at the bottom of the well
Answer:
The pressure given by the water at the bottom is 58,800 Pa
Explanation:
Pressure Exerted by a Column of Liquid
The pressure P exerted by a column of liquid of height h and density ρ is given by the hydrostatic pressure equation:
P = ρgh
Where ρ is the density of the liquid, g is the acceleration of gravity g=9.8m/s^2, and h is the height of the column of liquid.
The height of water in a well is h=6 m. The density of water is a known quantity:
[tex]\rho = 1,000\ kg/m^3[/tex]
Calculating P:
P = 1,000*9.8*6
P = 58,800 Pa
The pressure given by the water at the bottom is 58,800 Pa
(ii) Explain how sound energy is transferred through the wall without transferring matter
Answer:
In much the same way, a mechanical wave can carry energy through a medium without moving matter through the medium. ... Because the particles in a solid are tightly packed together, sound waves can quickly transfer energy from particle to particle in a solid.
Why do electrons stay around the nucleus of an atom?
Answer:
the nucleus of the atom is positively charged and the electrons are negatively charged, they are attracted to each other...
Answer:
There are 2 different types of neutrons. Negative and positive. They are both fighting over the atom. The atom doesn't know who to pick! The happy one? Or the emo one? They are both staying close because they don't want to lose this fight. (Actual answer below)
Explanation:
When there are too many protons, some of the outer protons are loosely bound and more free to react with the electron. But most atoms do not have too many protons, so there is nothing for the electron to interact with. As a result, each electron in a stable atom remains in its spread-out wavefunction shape.
When it is winter in the northern hemisphere we are receiving?
A) No sunlight
B) A moderate amount of sunlight
C) Direct sunlight
D) Indirect sunlight
Answer:
indirect sunlight
Explanation:
we're receiving some sunlight, but not much, if it's winter in one place, it's summer in another
Answer:
indirest sunlight
Explanation:
if there was no sunlight we would die.
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 was the first major action Roosevelt took AFTER he was inaugurated (sworn in as president)
He pardoned Hoover for war crimes against the Bonus Army
He proposed a reorganization of the Supreme Court
He closed all of the nation’s banks and ordered inspections
He established the Civil Works Administration to provide job relief
Answer:
the second one i guess????
Explanation:
Answer:
He closed all of the nation’s banks and ordered inspections
Explanation:
An airplane flies for 1.25 hours with a constant speed of 1080 km/hr and then for another 2.5 hours with a constant speed of 984 km/hr. How far (what distance) did it go?
Answer:
The airplane went 3810 km
Explanation:
The Distance at Constant Speed
The speed is defined as the rate of change of the distance:
[tex]\displaystyle v=\frac{d}{t}[/tex]
The distance is calculated by solving for d:
d = vt
The airplane first flies at v=1080 Km/h for t=1.25 hours. The first distance is:
d1 = 1080 Km/h * 1.25 h = 1350 Km
Then it flies at v=984 Km/h for t=2.5 hours. The second distance is:
d2 = 984 Km/h * 2.5 h = 2460 Km
The total distance was 1350 + 2460 = 3810 km.
The airplane went 3810 km
Please help me!!
Please answer correctly...
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PLZ HELP!! FOE A TEST
23. Quantities that can be described completely by their magnitude or size are called vector quantities. (5 points)
True
False
Answer:
False
Explanation:
Vector has a magnitude and direction.
A scalar is just a magnitude or size.
The answer is false.
What is scalar and vector quantities?
Scalar quantity:
The scalar quantity will have only the magnitude ( how much or size).These scalar quantity are one dimensional. These can be represented only by calculating the changes in the magnitude. If we need to change the value of scalar we are not able to change because it has no directions to determine the values of the quantity.If we have to perform any kind of mathematical operation, i.e., scalar with scalar we get scalar but when we did the mathematical operation with the scalar and vector then we get the answer is in the vector. some of the scalar quantities are as follows:Speed, Mass, length, distance, power, energy, work.
Vector quantity:
The vector quantity will have both magnitude and direction.The vector quantities are one dimensional, 2 dimensional, else can also be 3 dimensional.Vector quantities can be changed or determined both by the magnitude and direction. If we change the adjacent angles then there changes will occur in the direction.We can perform any kind of mathematical operation.Some of the vector quantities are: Displacement, velocity, acceleration, force, weight, friction, momentum.Hence, Option B is the correct answer.
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please help!! zoom in to read better should i put it in the middle or the far left? i also need to know why?
Answer:
They should place the fulcrum to the right ( just before reaching the load ), and they should push the furthest end on the left in order to provide equilibrium.
Why do electrons move from the negative end of the tube to the
positive end?
Which change would reverse the direction of the electric current generated through electromagnetic induction?
moving the magnet slower
using more loops of wire in the solenoid
using the opposite pole of the magnet
using a weaker magnet
Using the opposite pole of the magnet would reverse the direction of the electric current generated through electromagnetic induction.
What takes place while the current is reversed in an electromagnet?Whilst you opposite the path of the contemporary flowing within the cord, the north and south poles also are reversed. When you reverse the contemporary once more, the north and south poles reverse again. In fact, on every occasion the modern is reversed, the north and south poles will trade places.
Which alternate will reverse the route of the electric modern-day generated thru electromagnetic induction?A magnet and a coil of wire can be used to provide an electric-powered modern-day. A voltage is produced while a magnet moves into a coil of cord. This procedure is known as electromagnetic induction. The direction of the caused voltage is reversed while the magnet is moved out of the coil once more.
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Answer:
100% C
Explanation:
A 10 kg ball is rolled to the top of a hill 37 m high using 4000 J of work. How much energy was lost due to heat?
Answer:
370.3J
Explanation:
A 10 kg ball is rolled to the top of a hill 37 m high using 4000 J of work. How much energy was lost due to heat?
Step one:
given data
mass m= 10kg
height of the hill= 37m
work done= 4000J
Step two:
The quantity of energy loss due to heat is the same as the difference in the potential energy possed by the mass and the work done
PE= mgh
PE=10*9.81*37
PE= 3629.7J
Hence the energy loss is
= 4000-3629.7
=370.3J
how to draw angle of 135 degree
As the distance between two objects decreases, the pull of gravity
Question 4 options:
1) Is cancelled out
2) Increases
3) Decreases
4) Stays the same
Answer: increases
Explanation:
Because the relationship between hand d is counter
What will happen to the force of friction when you increase the weight on the cart
a person drops a 2.00 kg ball off a building. what is the force of weight on the ball?
Explanation:
Given
mass (m) = 2 kg
acceleration due to gravity (g) = 10 m/s²
Force (F) = ?
We know
F = m * a
= 2 * 10
= 20 N
The force is 20 N.
Hope it will help :)❤
Answer:
The answer is 19.6
You welcome
What is a good question to ponder/Think about ?
Explanation:
how to alweays win amoung us_
Willing to give out brainliest... A vat of ethyl alcohol expands by 0.00823 m^ 3 when the temperature is raised by 44.8 °C . What was the original volume of the alcohol ?
Answer: 0.164
Explanation:
the coefficient for ethyl alcohol b is 1120x10^-6
so (0.00823)/ (1120x10^-6)(44.8) gives you your answer: 0.164
HELP PLEASE WHOEVER ANSWERS CORRECT ILL MARK BRAINLIEST!
Which statement best describes codominance and incomplete dominance?
A. In codominance and incomplete dominance, both of the alleles are dominant.
B. In codominance and incomplete dominance, neither of the alleles are dominant.
C. In codominance, both of the alleles are dominant; in incomplete dominance, neither of the alleles is dominant.
D.In codominance, neither of the alleles is dominant; in incomplete dominance, both of the alleles are dominant.
Answer:
no it is not C they are tying to get point the answer is, B: In codominance and incomplete dominance, neither of the alleles are dominant
Answer:
the answer is B
Explanation:
A block moves along a table at a constant velocity and then rolls off the edge of the table. The forces that should be included in a free body diagram for the ball as it falls to the ground are:
normal force from table
friction force from table
gravity
force of fall
Answer:
Gravity
Explanation:
When the ball is falling to the ground, there is only one force- gravity. In some cases, there may be air resistance, but that seems to be neglected here.
Normal force:
Cannot be included. Normal force is only applicable when object is on a surface, and it acts perpendicular to the surface. Since the ball is falling, there is no surface, and therefore no normal force. This question gives you unnecessary information, designed to trick you. Please remember when normal force is applicable.
Friction force:
Also only applicable when object is moving, and is on the table. Friction only applies when there is an applied force. There is no applied force when the ball is falling, so therefore no friction force.
Force of fall:
First of all, what is this? There is nothing called force of fall.
Gravity:
This is the only one that applies. Just draw a vector arrow from the bottom of the ball and label it mg (acceleration due to gravity).
What is the net force acting on a box that is being pulled to the right with a 50 N force and to the left with a 10 N force? _________ to the _______
Explanation:
A box that is pulled by 2 forces:
50N to the right and10N to the left.50N - 10N = 40N.
Since the force acting towards the right is stronger, there is a net force of 40N to the right and the box will move towards the right (if it has low static friction coefficient)
The answer is 40N to the right.
We have that for the Question "What is the net force acting on a box that is being pulled to the right with a 50 N force and to the left with a 10 N force? _________ to the _______" it can be said that The appropriate statement is
The net Force is 40N to the right
From the question we are told
What is the net force acting on a box that is being pulled to the right with a 50 N force and to the left with a 10 N force? _________ to the _______
Generally the equation for the Net force is mathematically given as
Fn=F_2-F_1
Therefore
Fn=F_2-F_1
Fn=50-10
Fn=40N
Therefore
The appropriate statement is
The net Force is 40N to the right
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When the motion energy of an object changes, energy is being transferred. How do you know that's true?
Answer:
Explanation:
When objects collide, energy can be transferred from one object to another, thereby changing their motion. In such collisions, some energy is typically also transferred to the surrounding air; as a result, the air gets heated and sound is produced.
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Consider the system shown in FIGURE 9-35. Assume that after the string breaks the ball falls through the liquid with constant speed. If the mass of the bucket and the liquid is 1.20 kg, and the mass of the ball is 0.150 kg, what is the reading on the scale (a) Before (b) After the string breaks?
Answer:
Same reading.
Explanation:
Assume that after the string breaks the ball falls through the liquid with constant speed. If the mass of the bucket and the liquid is 1.20 kg, and the mass of the ball is 0.150 kg,
A.) Before the string break, the total weight = weight of the can + weight of the water.
According to Archimedes' Principle which state that: “A body immersed in a liquid loses weight by an amount equal to the weight of the liquid displaced.” Archimedes principle also states that: “When a body is immersed in a liquid, an upward thrust, equal to the weight of the liquid displaced, acts on it
B.) After the string break.
The scale will have the same reading as before the string break.
Positive and negative charger objects affect which type of field?
• gravitational
• electric
• magnetic
Answer:-
Electric forceThe interaction between two like-charged objects is repulsive. ... Positively charged objects and neutral objects attract each other; and negatively charged objects and neutral objects attract each other.
Explanation:
Hope it is helpful...
Which of these is an example of interference? A. two lasers pointing away from each other В. two different light waves colliding and adding together C. a light wave bending around the corner of an obstacle D. a light wave bouncing off of a flat surface
Answer:
I believe the answer is B. Although it might be C.
Explanation:
I hope this helps!
What units are used to measure mass?
Answer:
I think kilogram.
Explanation:
If you refer to science book you can find.
basic nature of friction
gravitational
electromagnetic
nuclear
none of these
Answer:
what is the question?????????????????????