Answer:
flows quickly
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
PLEASE HELP Due Soon!
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.
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 = 200JDraw Graph for the derivation of three equations of Motion
Answer:
Hey mate I shall not tell you the answer I shall explain it to you after this if still you can't understand then say
Explanation:
Derive v = u + at by Graphical Method. Consider the velocity – time graph of a body shown in the below Figure
Derive s = ut + (1/2) at2 by Graphical Method. Velocity so time graph to derive the equations of motion.
Derive v2 = u2 + 2as by Graphical Method. Velocity–Time graph to derive the equations of motion.
I hope you understand now
enjoy your day
#Captainpower :)❤❤
С
A rocket of mass 1000 kg is travelling through the atmosphere.
The force due to its engine is 1200 N, and the drag force and friction equal 400 N.
The resultant force is 800 N. Calculate its acceleration.
Show your working and give the units. Use the equation:
force
acceleration =
mass
Answer:
a = 0.8 [m/s²]
Explanation:
To solve this problem we must use Newton's second law which tells us that the resulting force on a body is equal to the product of mass by acceleration, in this way we come to the following equation:
∑F = m*a
where:
F = forces applied [N]
m = mass = 1000 [kg]
a = acceleration [m/s²]
Now using Newton's second law.
[tex]1200 - 400 = 1000*a\\800 = 1000 *a\\a=0.8[m/s^{2} ][/tex]
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
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
How much work is done by an applied force to lift a 45 newton block 6.0 meters at a constant speed ?
Answer:
270Joues
Explanation:
Step one:
given data
Force F= 45N
distance moved d= 6m
Required
The work done in moving the block 6m
Step two:
We know that the expression for the work done is
WD= force* distance
WD= 45*6
WD=270Joues
Convection is heat transfer in ——————-.
Answer:
fluids
Explanation:
the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat.
_________________________________
Convection Is Heat Converted Into Vapour_________________________________
WILL MARK BRAINLIEST PLEASE HELP AND SHOW ALL WORK
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.
Which characteristics are common to most salamanders? Check all that apply.
They undergo internal fertilization. They lose their tails as adults. They have wet, moist skin. They have long, strong legs. They begin life with gills.
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
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.
Learn more about the scalar and vector quantities,
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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.
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).
C
the energy of position or shape
Calculate the Kinetic Energy of a 0.06 kg tennis ball moving at a velocity of 30
m/s *
Kinetic & Potential Energy
KE = { m V? PE = mgh
Quick & Simple!
54
Calculate the memetic energy of a 0.06 kg tennis ball moving at a velocity of 30 m/s
Answer:
27J
3528J
Explanation:
First problem:
Given parameters:
Mass of tennis ball = 0.06kg
Velocity of tennis ball = 30m/s
Unknown:
Kinetic energy = ?
Solution:
Kinetic energy is the energy due to the motion of a body.
It is expressed as:
K.E = [tex]\frac{1}{2}[/tex] m v²
K.E = [tex]\frac{1}{2}[/tex] x 0.06 x 30² = 27J
Second problem:
Given parameters:
Mass = 30kg
Height = 12m
Unknown:
Potential energy = ?
Solution:
Potential energy is the energy due to the position of a body.
Mathematically;
Potential energy = mgh
m is the mass
g is the acceleration due to gravity
h is the height
Now;
Potential energy = 30 x 9.8 x 12 = 3528J
MacGyver is riding on a skateboard and moving west of the velocity of 7 m/s. Macgyver has a mass of 92 kg and the skateboard has a mass of 8kg. if MacGyver jumps off the skateboard and velocity of 2 m/s east, What will the final velocity of the skateboard be? Show your work.
Answer:
64.5
Explanation:
(m1 + m2) v initial = (m1 * v1 final) + (m2 * v2 final)
(92 + 8)(-7) = (92 x 2) + (8 x v2 final)
(100)(-7) = (184) + (8 x v2 final)
-700 = (184) + (8 x v2 final)
-516 = (8 x v2 final)
-516/8 = v2 final
-64.5 = v2 final
What units are used to measure mass?
Answer:
I think kilogram.
Explanation:
If you refer to science book you can find.
(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.
When Simon goes to the pet store, he plans on getting a new fish for his aquarium.
Using an infinitive, what is the BEST way to revise the underlined words?
A) When Simon goes to the pet store, he plans to get a new fish for his aquarium.
B) When Simon goes to the pet store, he plans for to get a new fish for his aquarium.
C) When Simon goes to the pet store, he plans for getting a new fish for his aquarium.
D) When Simon goes to the pet store, he plans to be getting a new fish for his aquarium.
basic nature of friction
gravitational
electromagnetic
nuclear
none of these
Answer:
what is the question?????????????????????
Describe the shape of a convex lens and a concave lens. Describe what effects each type of lens has on light. Then describe how you might use these types of lenses
PLEASE HURRY I AM IN A SCIENCE TEST DUE AT 1:30
Answer:
Explanation:
Convex lens refers to the lens which merges the light rays at a particular point, that travels through it.
Concave lens can be identified as the lens which disperses the light rays around, that hits the lenses.
Why do electrons move from the negative end of the tube to the
positive end?
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 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.
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
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...
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
What will happen to the force of friction when you increase the weight on the cart
Which statement describes what happens to rocky shorelines that absorb
energy from ocean waves?
A. The shorelines are strengthened.
B. Solid rock breaks apart.
C. The rocks form a barrier, and the shorelines are not affected.
D. Small rocks and sand block the waves' energy.
Answer:
B. Solid rock breaks apart.
Explanation:
Answer:
B
Explanation:
I did it on a test lol