Answer:
by applying a magnetic force to recycled materials
Answer:
by applying a magnetic force to recycled materials is the correct answer
Explanation:
Light includes which of the following?
A.Radio waves and microwaves
B.Visible light
C.X-rays and gamma rays
D.All of the above
Answer:
Light includes ALL of these answers: Radio/Microwaves. Visible light and X-rays/Gamma rays.
A 1.31 kg flower pot falls from a window. What is the momentum of the pot when it
has fallen far enough to have a velocity of 2.86m/s?
00.458 kgm/s
06.35 kgm/s
O 3.75 kgm/s
02.18 kgm/s
the answer is 3.75 kgm/s
Momentum= mass x distance
1.31 x 2.86= 0.375kgm/s
The diagra shows molecules in a fluid. Explain the
sequence of events that happens when this fluid cools down. Be sure to focus on what happens to the
molecules and to the fluid in general. Five events
should be included in your answer.
Answer:
Check below for the answers and explanations.
Explanation:
Note: You did not provide the diagram you mentioned but I will explain to you the sequence of events that take place as a fluid cools. I believe you can apply this to the particular diagram that you have.
Sequence of events that take place as a fluid cools down:
There is a reduction in the temperature of the fluidThe speed of movement of the molecules will reduceSince there is a reduction in speed, the Kinetic Energy also reduces. KE = 1/2 mv²The density of the fluid will increase as the temperature decreasesThe molecules will be closer to each other as opposed to in a gas where there is collision of moleculesThe sequence of events that occur when a fluid cools down are;
The temperature of the liquid will drop
When the temperature drops, the molecules will move more slowly.As a result of this decrease in velocity, the kinetic energy of the molecules will also decrease.As the temperature of the fluid decreases, the density of the liquid increases accordingly.The liquid molecules will draw closer together and intermolecular forces will become more significant.Liquid moleculesWe have to note that according to the kinetic theory of matter, the molecules of a liquid are in constant random motion. The kinetic energy of these molecules depend on the temperature of the liquid.
The five sequence of event that happens as liquid molecules cool down are;
The temperature of the liquid will dropWhen the temperature drops, the molecules will move more slowly.As a result of this decrease in velocity, the kinetic energy of the molecules will also decrease.As the temperature of the fluid decreases, the density of the liquid increases accordingly.The liquid molecules will draw closer together and intermolecular forces will become more significant.Learn more about liquid molecules: https://brainly.com/question/25667812
An 870 N firefighter, F_ff, stands on a ladder that is 8.00 m long and has a weight of 355 N, F_ladder. The weight of the ladder acts at its center, and the ladder is leaning against a smooth wall at an angle of 50.0° between the ladder and the ground. The firefighter stands at a point 6.30 m from the base of the ladder. The ground is not smooth and exerts a force, F_ground, on the ladder to keep it from slipping. Determine the forces that the wall puts on the ladder, F_wall, and that the ground puts on the ladder, F_ground.
Answer:
Explanation:
Weight of the ladder is 355N
WL = 355N
The weight of the ladder acts at center of the ladder I.e at 4m from the bottom
Weight of firefighters is 870N
Wf = 870N
The fire fighter is at 6.3m from the bottom of the ladder.
N1 is the normal force exerted by the wall
N2 is the normal force exerted by the ground
Using Newton law
Check attachment
ΣFy = 0, since body is in equilibrium
N₂ - WL - Wf = 0
N₂ = WL + Wf
N₂ = 870 + 355
N₂ = 1225 N
This the normal force exerted by the ground on the wall.
Now to get N₁, let take moment about point A
So, before we take the moment we need to make sure that the forces are perpendicular to the plane(ladder), we need to resolve the weight of the ladder, firefighter and the normal of the wall to be perpendicular to the plane.
ΣMa = 0
Clockwise moment is equal to anti-clockwise moment
Moment Is the produce of force and perpendicular distance.
M = F×r
So,
WL•Cos50 × 4 + Wf•Cos50 × 6.3 —N₁•Sin50 × 8 = 0
355•Cos50 × 4 + 870•Cos50 × 6.3 =
N₁•Sin50 × 8
1825.52 + 3523.12 = 6.13N₁
6.13N₁ = 5348.64
N₁ = 5348.64/6.13
N₁ = 872.54 N.
The normal force exerted by the wall is 872.54N
A 12-kg bowling ball is rolled toward a stationary, 0.9-kg bowling pin at 2.4m/s to the right. After the collision, the bowling ball continues to move in the same direction at 1.3m/s.
Determine the final velocity of the bowling pin.
Answer:
14.6m/s
Explanation:
elastic collision formula
mv1+mv2=mv1'+mv2'
mv1= mass times velocity of the first object
mv2= mass times velocity of the second object
mv1'=mass times velocity of the first object after the collision
mv2= mass times velocity of the second object after the collision.
we know that the pin is not moving so we multiply 0 or its velocity by the mass 0.9kg this equals zero so we don't add this part to the equation.
mv1=mv1'+mv2'
plugin the values and solve using order of operations
12kg(2.4m/s)=12kg(1.3m/s)+0.9kg(v2')
28.8kg.m/s=15.6kg.m/s+0.9kg(v2')
at this point you need to move 15.6kg.m/s to the other side of the equation so subtract 15.6kg.m/s to 28.8kg.m/s
28.8kg.m/s=15.6kg.m/s+0.9kg(v2')
28.8kg.m/s - 15.6kg.m/s= 0.9kg(v2')
finally Divide by 0.9kg in order to leave v2' in one side.
13.2kg.m/s=0.9kg(v2')
13.2kg.m/s÷0.9kg=v2'
14.6kg.m/s=v2'
The sprinter ran 110 m in 11 seconds. What was her average speed in m/s?
Answer:
10 m/s
Explanation:
110/11=10
Answer:
10 m/s
Explanation:
110/11= 10 m/s
Of the eight most abundant elements in earths crust, what percentage does the six next most abundant elements of earths crust make up?
Answer:
the sixth most abundant element in the earth's crust is sodium and it occupies 2.8%
Final answer:
The six next most abundant elements after oxygen and silicon make up 23.7% of the Earth's crust.
Explanation:
The student asked about the percentage of the Earth's crust made up by the six next most abundant elements after oxygen and silicon. Given that Oxygen and Silicon together make up 74.3% of the Earth's crust (46.6% oxygen and 27.7% silicon), we know that the eight most abundant elements constitute 98% of the Earth's crust. To find the combined percentage of the six following most abundant elements, we subtract the percentage of oxygen and silicon from 98%, which is 98% - 74.3% = 23.7%. Hence, aluminium, iron, calcium, sodium, potassium, and magnesium together make up 23.7% of the Earth's crust.
Why does the sun produce energy
Answer:
The sun generates energy from a process called nuclear fusion. During nuclear fusion, the high pressure and temperature in the sun's core cause nuclei to separate from their electrons. Hydrogen nuclei fuse to form one helium atom. During the fusion process, radiant energy is released.
A semi truck accelerates from rest to 36 m/s in just 12 seconds. What is its acceleration?
Answer:
3 m/sec(squared)
Explanation:
a=change in velocity/time
a=v-u/t
a=36-0=36/12
a=3m/s(squared)
The acceleration is 3 m/s².
To calculate the acceleration, the velocities given are:
Initial velocity u = 0 m/s,
Final velocity v = 36 m/s,
Time, t = 12 seconds.
What is acceleration and how it was calculated?Definition:
Acceleration can be defined as the total change in velocity, i.e., change in final velocity to the change in initial velocity to the total time taken.
Acceleration is a vector quantity as it has both magnitude and direction.
Formula for Acceleration, a = (( v - u) /t ) m/s².
[tex]\overline{a} = \frac{v - v_0}{t} = \frac{\Delta v}{\Delta t}[/tex]
v = Final velocity
u = Initial velocity
t = Time taken
Substitute all the given values in the formula,
a = ( 36 - 0) / 12
= 36 / 12
a = 3 m/s².
Thus, the truck's acceleration is calculated as 3 m/s².
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please help me asap!!!!!!!
Answer:
you should have given the passage too bt i think option b is correct..
All of the following are common symptoms of all dissociative disorders except
A. wandering away from home
B. mental health problems
C. feelings of detachment
D. a blurred sense of identity
All of the following are common symptoms of all dissociative disorders except wandering away from home.
Dissociative disorder, or dissociative identity disorder, is a psychological disorder in which a person has changes in consciousness, memory, identity, emotion, perception of the environment, control of movements and behavior, which can happen after traumatic or high-stress events.
What types of dissociative disorder?Overview of dissociative disorders.
Depersonalization/derealization disorder.Dissociative amnesia.Dissociative identity disorder.See more about dissociative disorders at brainly.com/question/4566966
Describe an example where you want to solve for a balanced Fnet= 0N
An unopened door pushed by two people with same force is the example for balanced Fnet=0N
Explanation:
There are two types of forces that acts on an object.
Balanced force and unbalanced force
In balanced force the net force becomes zero as the name itself indicates that the forces acting on the object gets balanced and cancels out each other.
Example:- Consider a door, and if two people with equal forces are trying to push the door. Then the net force becomes zero as the door remains not opened.
In unbalanced force the net force will not be zero as the forces acting on them are not equal.
Example: Soccer game ball pushed by the player is the best example.
The net force describes the sum or all the forces acting in the different directions on an object. When the net force is 0, then the force is balanced, otherwise, it is unbalanced.
A scenario where we have a balanced force would be a situation whereby a box at rest is being pushed in opposite direction.
When the force which tends to propel the box forward is equal to the force which tends to push the ball backward. Then the ball would not move and remain in the same position.
Hence, the net force acting on the box is balanced.
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Which statements about light are true? Select all that apply. Select one or more: a. It can travel through empty space. b. It has no mass. c. It has moving electrons. d. It’s made of moving electric and magnetic fields.
Light can travel through empty space (a), has no mass (b) and is made up of moving electric and magnetic fields (d). It does not consist of moving electrons.
Explanation:In analyzing the statements about light, the following are true:
a. It can travel through empty space. This is evident in how sunlight reaches the Earth's atmosphere directly from the sun, traveling through the empty space in the universe. b. It has no mass. Light, whether as a particle or a wave, has no rest mass.d. It’s made of moving electric and magnetic fields. Physicist Maxwell speculated that light was a form of electromagnetic radiation, an electromagnetic disturbance moving at the speed of light. This conclusion has been confirmed in laboratory experiments.Statement c which says light has moving electrons is untrue. Instead, light is made up of particles called photons, which are massless and don't consist of electrons.
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A flagpole is a simple device on which a flag can be raised or lowered. Which simple machine is usually part of a flag pole?
A) lever
B) wedge
C) pulley
D) inclined plane
Answer:
C, a pulley! A pulley is made of a wheel and rope and in the case of the flagpole, it uses the pulley to raise the flag by pulling the rope.
A force of 120.0 N is applied to a 3.00 kg block. What is the average acceleration of the block?
Explanation:
F = ma
120.0 N = (3.00 kg) a
a = 40.0 m/s²
What is the wavelength in nm of a light whose first order bright band forms a
diffraction angle of 30 degrees, and the diffraction grating has 700 lines per
mm? (give answer in whole number format) *
The wavelength of the first order bright band light light is 714 nm .
Explanation:
We have to find the wavelength of the first order brightness of a light. Here we are using Huygen's principle of light.
The formula is
nλ =d sinθ
where, n is the order of maximum
λ is the wavelength of light
d is the distance between the lines on diffraction grating.
θ is the angle.
For the given equation n is 1 because the problem states that the light forms 1st order bright band
λ is unknown.
d = [tex]\frac{1}{700,000}[/tex] or 0.0000014 m
sin (30) = 0.5
so,
1(λ) = (0.0000014)(0.5)
= 0.0000000714
= 714 nm
Thus, The wavelength of the first order bright band light light is 714 nm .
Mark needs to lower the pitch of the guitar to play his songs. How can Mark lower the pitch of the guitar?
A
Mark can make the strings tighter so they vibrate faster.
B
Mark can make the strings looser so they vibrate faster.
C
Mark can make the strings tighter so they vibrate slower.
D
Mark can make the strings looser so they vibrate slower.
12 g of coal contains approximately 6 × 1023 atoms of carbon.
How many atoms would be in 1 kg of carbon?
Show your working.
Answer:
5*10^25 atoms of carbon
Explanation:
Check from the periodic table:
M(carbon) = 12.01 g/mol
Convert kg into g:
1 kg = 1000 g
Calculate the number of moles of carbon:
n(carbon) = (1000 g) ÷ (12.01 g/mol) = 83.26 mol
Convert moles into number of particles:
#(carbon) = n × NA = 83.26 mol × 6*10^23
= 5*10^25 particles
Note: NA represents the Avogadro's Number, which has the value 6.02*10^23 particles/mol.
The work done by a force is greatest when the force and the displacement vectors are ________.
A.perpendicular
B.parallel
C.equal
D.balanced PLEASE HELP!!!!!!!!!
A 60 W bulb is left on from 8:00 a.m. to 3:00 p.m. Calculate the energy usage of the bulb.
kWh
Answer:
.42
Explanation:
Answer:
0.42
Explanation:
A flask that weighs 345.8 g is filled with 225 mL of carbon tetrachloride. The weight of the flask and carbon tetrachloride is found to be 703.55 g. From this information, calculate the density of carbon tetrachloride.
Answer:
Well, I think the best answer will be is 1.59 g/mL Good Luck!
The density of carbon tetrachloride in the flask is calculated by subtracting the weight of the empty flask from the total weight to get the weight of the carbon tetrachloride. Then, use the formula density = mass/volume, which results to 1.589 g/mL.
Explanation:To calculate the density of carbon tetrachloride in the flask, first determine the weight of the carbon tetrachloride by subtracting the weight of the empty flask from the total weight. So, 703.55 g (the total weight) - 345.8 g (the weight of the flask) = 357.75 g (weight of carbon tetrachloride).
Next, we use the formula for density which is: density = mass/volume. Our mass (weight of carbon tetrachloride) is 357.75 g and our volume is 225 ml. Therefore, the density of carbon tetrachloride is 357.75 g / 225 ml = 1.589 g/mL.
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This type of telescope uses a lens to collect
light.
Answer: optical telescope.
The green bars are called "error bars." They indicate the range of uncertainty that scientists have about the data on the graph. (Note: Not all error bars are shown.)
Why do you think these error bars are smaller near the year 2000 than in the 1890s?
This graph shows data up to about 2010. So it couldn't have been drawn before 2010. OF COURSE the data from only 10 years earlier was more reliable than the data that was 120 years old ! It wasn't even measured the same way back then as it is now.
Error bars are used to show the error in a reported measurement. The reason why the error bars are smaller near the year 2000 than in the 1890s because the ways of measuring have changed majorly over the past 100 years. The ways of measuring 100 years ago were probably not as accurate as the ways of measuring today.
Best of Luck!
What is the difference between negative and positive acceleration?
Answer: Positive acceleration means increase in velocity with time. Negative acceleration means the speed reduces with the time.
PLEASE HELP!!! WILL MARK BRAINLIEST!! Which example is not an electromagnetic wave?
ultraviolet light
infrared light
ultra high frequency sound
visible light
ultra high frequency sound
Explanation:
Ultraviolet light, infrared light, and visible light are all examples of electromagnetic waves.
Ultra high frequency sound, on the other hand, is a type of mechanical wave. Sound waves are mechanical waves that require a medium (such as air, water, or solid) to propagate, while electromagnetic waves do not require a medium and can travel through a vacuum (like in space). Ultra high frequency sound is not classified as an electromagnetic wave
Which sample has the lowest temperature?
Sample C has the lowest kinetic energy value and, assuming the same conditions for all samples, it would also have the lowest temperature. Therefore, option C is correct
The image contains a list of samples with their corresponding average kinetic energies of molecules in joules. To determine which sample has the lowest temperature, we would need to apply the principle that, at a given temperature, the average kinetic energy of molecules is proportional to the temperature itself. This is described by the equation:
[tex]\[ KE_{avg} = \frac{3}{2} k T \][/tex]
where [tex]\( KE_{avg} \)[/tex] is the average kinetic energy, [tex]\( k \)[/tex] is the Boltzmann constant [tex](\(1.38 \times 10^{-23} \text{ J/K} \))[/tex], and [tex]\( T \)[/tex] is the temperature in kelvins.
However, without additional information about the specific gases or the number of molecules involved, we cannot calculate the exact temperature from the average kinetic energy. Typically, the kinetic energy of a sample is directly proportional to its temperature (in an ideal gas scenario). Therefore, the sample with the lowest average kinetic energy would also have the lowest temperature.
Based on the average kinetic energy values provided in the image, we can conclude that:
- Sample A has [tex]\( 1.50 \times 10^4 \)[/tex] J
- Sample B has [tex]\( 1.73 \times 10^5 \)[/tex] J
- Sample C has [tex]\( 2.73 \times 10^3 \)[/tex] J
- Sample D has [tex]\( 5.06 \times 10^4 \)[/tex] J
Sample C has the lowest kinetic energy value and, assuming the same conditions for all samples, it would also have the lowest temperature.
Read the sentence form the section "Heavy Weights Can Be Trouble for Teens." Other schools that use the program are leery of the weight lifting. Which of the following words, if it replaced the word "leery" would CHANGE the meaning of the sentence? *
1 point
a. wary
b. cautious
c. unaware
d. skeptical
A series circuit has a current of 5 A. The circuit contains 10ohms resistor. What is the voltage of the circuit
Answer:
50 Volts
Explanation:
Using Ohm's Law
V= I x R
V= 5 x 10
V = 50 V
How do you find the volume of a cone with a height of 27 cm and a radius of 13 cm?
Answer:
1521π cm³
Explanation:
V = π·r²·h/3
= π·13²·27/3
= π·169·9
= 1521π cm³
How does this person use energy to
ride the river's rapids?
Explanation:
Image? there is not image in there so I wouldn't be able to answer it properly...
Riding river rapids uses the kinetic energy of water to propel a kayak, while hydroelectric systems control and convert this energy into electricity.
How Energy is Used to Ride the River's Rapids:
When riding the river's rapids, a person uses kinetic energy inherent in the flowing water. The experience can be thrilling, as one navigates through the rushing white water in a kayak or other vessel. The power of a river's flow is a result of its ability to convert mechanical (potential) energy into thermal energy and hydroelectric power. In the case of rapids, the conversion of potential energy into kinetic energy creates the movement and force that propel the kayak downhill, offering the energy needed for the ride.
Similarly, hydroelectric systems like run-of-the-river projects harness the energy of a river in a more controlled manner. By directing water through a turbine—similar to how rapids propel a kayak—these systems convert the river's kinetic energy into mechanical energy, and subsequently into electricity with minimal energy lost as heat.