Answer:
have a frequency. higher than the frequency actually produced by the source.
Explanation:
Answer:
If a source of sound waves is rapidly approaching a person, the sound heard by the person appears to have - a pitch lower than the original pitch.
fill in the term to complete each sentence
a wave carries___ from one place to another.
mechanical waves carry energy through___.
Energy
A material medium
A wave carries energy from one place to another. Mechanical waves carry energy through a material medium.
What is a wave?A wave is a phenomenon that flows across a material medium without leaving any lasting mark.
Mechanical or electromagnetic waves can be used to classify them. Transverse and longitudinal are the two main forms.
A wave carries energy from one place to another. Mechanical waves carry energy through a material medium.
Hence the correct options for the fill-in-the-blanks are energy and a material medium.
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When a cup of water, held upright, is dropped on the moon, the air makes the
cup fall faster than the water.
O A. True
B. False
Answer:
False
Explanation:
They both posses constant acceleration
B - False
hope this helps
PLS HELP. I WILL MARK U THE BRAINLIEST IF U ANSWER EVERYTHING STEP BY STEP AND CORRECTLY.
distance is the length of his trip so 15( 3+4+8)
displacement is how far he is from his original point ( -5)( -4^2 + 3^2 = 5^2) he was displaced 5 meters from his start position
What is the average velocity of atoms in 2.00 mol of neon (a monatomic gas)
at 308 K? Use the equation: -mv2
2
For m, use 0.02000 kg. Remember that R = 8.31 J/(mol-K).
= ER
3
2
nRT
A. 1540 m/s
B. 876 m/s
C. 87.6 m/s
O D. 15,400 m/s
Answer:
v = 876 m/s
Explanation:
It is given that,
Number of mol of Neon is 2 mol
Temperature, T = 308 K
Mass, m = 0.02 kg
Value of R - 8.31 J/mol-K
We need to find the average velocity of atoms in 2.00 mol of neon. Neon is a monoatomic gas. Let v is the velocity. So,
[tex]\dfrac{1}{2}mv^2=\dfrac{3}{2}nRT\\\\v=\sqrt{\dfrac{3nRT}{m}} \\\\v=\sqrt{\dfrac{3\times 2\times 8.314\times 308}{0.02}} \\\\v=876.47\ m/s[/tex]
So, the correct option is (B).
As shown in the figure below, April enters a race. She runs leftward 100 m to her horse, then she rides 500m to her truck, then she drives 1000m in a total time of 120s. What is her average velocity over the 120s period?
Answer:
The answer is below
Explanation:
The average velocity is the ratio of total distance traveled to the total time taken to complete the distance. The International System of Units (SI) unit of velocity is the meter per second (m/s). The Velocity is given by the equation:
Velocity = total distance traveled / total time taken
The total distance traveled = Distance traveled by horse + distance traveled by truck + remaining distance traveled = 100 m + 500 m + 1000 m = 1600 m
Total time taken = 120 s
Velocity = total distance traveled / total time taken = 1600 m / 120 s = 13.33 m/s
Velocity = 13.33 m/s
When an object is fully magnetized, all of its magnetic domains will be ?
A
Facing random directions,
B
Facing opposite directions, split down the middle of the object.
С
Facing opposite directions every-other domain
D
All facing the same direction.
At what distance from the centre of the earth its acceleration due to gravity becomes one third only? [Mass and radius of earth = 6x10 24 kg & 6.4x10 6 m resp.]
Answer:
235
Explanation:
3. There are twice as many people in the household, but your income has also doubled. Is your new
tax liability about twice as much as when you were single, more than twice as much, or less than
twice as much? Tell whether you think this difference-or the lack of one-seems fair.
Answer:
The answer is less than twice as much.
Explanation:
When the income doubles, the personal tax liability also doubles. However, because I have more dependents on my household, I'm able to get tax reductions to take care of the dependents.
why can the suns rays cause a burn but the light from a flashlight cannot harm your skin?
What is one commonality among all Consumer Service jobs?
helping individuals live better lives
obtaining vocational training
providing individuals with tangible goods
working with people
A cylinder is submerged in water as illustrated in the diagram. At which two positions is the pressure the same?
1- A and B
2- B and C
3- A and D
4- B and D
Answer:
it is two or three
Explanation:
Answer:
2- B and C
Explanation:
The arrows are at the same location in opposite ends and are the same length.
how are longitudinal and transverse waves alike? how are they different?
Answer:
Both waves have some common features
Explanation:
Following features are similar in longitudinal and transverse waves:
Both waves are mechanical waves.
Both transport energy without transporting matter.
Particles oscillate about their mean position in both waves.
These waves satisfy the formula:
v=f*λ
Answer:
SAME:
- They both transfer energy in waves
- They both have a frequency and period
- Both are mechanical waves and require a medium
DIFFERENT:
- Transverse waves move in a perpendicular direction
- Longitudinal waves move in a parallel direction
Which of the following is part of the internal energy of a substance?
O A. Kinetic energy from nuclear forces
B. Kinetic energy from intermolecular forces
O C. Potential energy from nuclear forces
O D. Potential energy from intermolecular forces
The correct answer is Potential energy from intermolecular forces.
Potential energy from intermolecular forces is part of the internal energy of a substance, therefore the correct option is D.
What is internal energy?It is the total energy of the substance that is contained in the system which is the sum of all the kinetic energy and potential energy of the molecules and the atoms contained in it.
The potential energy of the intermolecular forces is also part of the internal energy of the substance.
Learn more about internal energy
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used to measure mass
━━━━━━━☆☆━━━━━━━
▹ Answer
Kg is the unit used to measure mass.
▹ Step-by-Step Explanation
Kg stands for kilogram, and is the SI unit used to measure mass.
Hope this helps!
CloutAnswers ❁
━━━━━━━☆☆━━━━━━━
12.
As the skydiver falls to Earth, her parachute helps her land safely by:
C. warming the
a. increasing air resistance
surrounding air
b. acting like a helium-filled balloon
d. blocking the Sun's rays
Answer: A
Explanation: How large a parachute is (in other words, the parachute's surface area) affects its air resistance, or drag force. ... In the case of these parachutes, the drag force is opposite to the force of gravity, so the drag force slows the parachutes down as they fall.
Answer:
a
Explanation:
a is the answer to that question, increasing air resistance surrounding air
I hope this was helpful
In the diagram, q1 = -6.39*10^-9 C and q2 = +3.22*10^-9 C. What is the electric field at point P? pls help
Answer:
Below
Explanation:
First draw the vectors that represent both electric fields.
E1 is the elictric field created by q1, E2 is the one created by q2.
● q1 is negative so E1 will point from P.
● q2 is positive so E2 will point out of P
(Picture below)
■■■■■■■■■■■■■■■■■■■■■■■■■■
The resulting electric field is equal to the sum of the two fields since both vectors are colinear.
Let E be the total field.
● E = E1 + E2
The formula of the electric field intensity is:
● E = K ×(q/d^2)
-K is Coulomb's constant
-d is the distance between the charge and the object ( here P)
-q is the charge
■■■■■■■■■■■■■■■■■■■■■■■■■■
● E1 = K × (q1/d1^2)
The distance between q1 and P is the qum of 0.15 m 0.25 m. (0.4 m)
Coulombs constant is 9×10^9 m^2/C^2
● E1 = 9×10^9 ×[-6.39 × 10^(-9)/ 0.4^2]
● E1 = -359.43 N/C
■■■■■■■■■■■■■■■■■■■■■■■■■■
● E2 = K ×(q2/d^2)
The distance between q2 and P is 0.25 m.
● E2 = 9×10^9×[3.22×10^(-9) /0.25^2]
● E2 = 463.68 N/C
■■■■■■■■■■■■■■■■■■■■■■■■■■
● E = E1 + E2
● E = -359.43+463.68
● E = 105.25 N/C
two trucks leave at different times (from the same place) headed for the same city. Both trucks arrive at the same time. Based on the this information, which of the following statements is true? A. The trucks traveled the same distance in the same amount of time B. The trucks were traveling at the same average speed C. The trucks traveled different distances D. The truck that left later traveled faster
An object traveling at a velocity of 50 m/s comes to a stop in 10 seconds. What is the
object's acceleration?
a. 5 m/s/s
b. 5 m/s/s
C. 500 m/s/s
d. -500 m/s/s
Answer:
Hey there!
For this question, we use the acceleration formula:
A=V/T
A=-50/10
A=-5 m/s/s
Let me know if this helps :)
A researcher is studying traffic patterns at an intersection before an upcoming construction project. As part of this investigation, the researcher writes a scientific question, develops a procedure to observe traffic specifically at this intersection, and draws a conclusion. Which type of investigation is the researcher conducting? descriptive comparative experimental procedural
Answer:
Procedural is the answer
hope this helps
HELP PLSSSSSSS ASAP FIRST CORRECT ANSWER WILL GET BRANLIST. A bunny accidentally knocks a basket of eggs off of a table. Luckily the basket lands safely on the floor with all the eggs unbroken. Air resistance is negligible. What is the acceleration of the egg-basket system in midair? A)The acceleration cannot be determined without knowing how hard the basket was pushed. B) Acceleration is downward and less than g because the eggs are light. C) The acceleration fluctuates because of the rolling of the eggs. D) Acceleration is downward with a magnitude of g because the system is a projectile.
Answer: i think is C
Explanation:
Because eggs do not have a good weight and the basket swings because not all eggs weigh the same there are small and large in the basket
I think it's this good luck :)
Answer:
Acceleration is downward with a magnitude of g because the system is a projectile.
Explanation:
What percent of the gross domestic product (GDP) is currently generated by the service industry?
68 percent
71 percent
82 percent
95 percent
The global economy is heavily reliant on the service sector, which accounts for more than two-thirds of global GDP, over three-quarters of foreign direct investment in advanced nations, the majority of worker employment, and the majority of job growth. Thus, option B is correct.
What GDP is generated by the service industry?The service sector, often known as the tertiary sector, makes up the third tier of the three-sector economy. Instead of creating products, this sector provides training, consulting, and maintenance and repairs.
The GDP of the nation is significantly impacted by the service sector. Through trade in services, it not only generates many jobs, but also significantly improves the country's economic performance.
Therefore, 70% of GDP is made up of consumer expenditure. The retail and service sectors are important to the American economy.
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the particles in a gaseous substance can move easily because the____
a. particles are free to move
b. containing vessel is to big
c. force between them is weak
d. particles are moving with great speed
Answer:
a option okkkkkkkkkkkkkk
Answer:
particles are free to move
My grandmother lives 100m north of me. If I get in my car and drive to her house in 4s,
what was my average velocity?
a. 0.04 m/s
b. 2.5 m/s
c. 25 m/s north d. 250 in/s east
Answer:
(C) Average Velocity = 25 m/s due North
How many millimeters are 120 meters ? Help ! Please <3
PLS HELP. I WILL MARK U THE BRAINLIEST IF U ANSWER EVERYTHING STEP BY STEP AND CORRECTLY.
Answer:
Distance = 15m
Displacement = 5m
Explanation:
For distance add the values
For displacement use Pythagoras formula
When an object is fully magnetized, all of its magnetic domains will be ?
Answer:
magnetically saturated
Explanation:
When all of the domains are aligned, the material is said to be magnetically saturated. When a material is magnetically saturated, no additional amount of external magnetization force will cause an increase in its internal level of magnetization.
hope this helps u :)
A ladder rests in limiting equilibrium against a rough vertical wall and with its foot on rough horizontal ground, the coefficient of friction at both points of contact being 0.5. The ladder is uniform and weighs 300N. Find the angle which the ladder makes with the horizontal ground. Find also the normal reactions at the wall and the ground.
Answer:
θ = 36.9°
N = 240 N
R = 120 N
Explanation:
Draw a free body diagram. There are five forces on the ladder:
Weight force mg pulling down at the center of the ladder,
Normal force N pushing up at the ground,
Friction force Nμ pushing right at the ground,
Reaction force R pushing left at the wall,
and friction force Rμ pushing up at the wall.
Sum of forces in the x direction:
∑F = ma
Nμ − R = 0
R = Nμ
Sum of forces in the y direction:
∑F = ma
N + Rμ − mg = 0
N + Nμ² − mg = 0
N (1 + μ²) = mg
1 + μ² = mg / N
Sum of torques about the base of the ladder.
∑τ = Iα
mg (L/2 cos θ) − R (L sin θ) − Rμ (L cos θ) = 0
mg (L/2 cos θ) = R (L sin θ) + Rμ (L cos θ)
mg (1/2 cos θ) = R (sin θ + μ cos θ)
mg / 2 = R (tan θ + μ)
mg / (2R) = tan θ + μ
Substitute:
mg / (2Nμ) = tan θ + μ
(1 + μ²) / (2μ) = tan θ + μ
(1 − μ²) / (2μ) = tan θ
Given μ = 0.5:
tan θ = (1 − 0.5²) / (2 × 0.5)
tan θ = 0.75
θ = 36.9°
The reaction forces are:
N = mg / (1 + μ²) = 240 N
R = Nμ = 120 N
In order to stop experimental subjects from trying to confirm the scientist's hypothesis, psychologists sometimes obtain written promises from participants to be honest maintain subject confidentiality deceive participants about the true purpose of the experiment allow people to choose when they want to leave the study remove participants from the study before it starts
Answer:
C deceive participants
Explanation:
It is ethical practice to come clean or tell the truth about being deceptive at the end of the study. They need to be told that they were deceived.
In order to stop experimental subjects from trying to confirm the scientist's hypothesis, psychologists sometimes deceive participants about the true purpose of the experiment. The correct option is C.
What is psychologists?Psychologists can help people learn to cope with stressful situations, overcome addictions, manage chronic illnesses, and administer tests and assessments that can aid in the diagnosis of a condition or reveal more about a person's thoughts, feelings, and behaviors.
Psychotherapy can be aided by both psychologists and psychiatrists.
However, most psychiatrists treat patients primarily through medication, whereas psychologists primarily treat patients through talk and/or behavioral therapy.
People seek the help of a clinical psychologist to deal with mood-related issues such as depression, mania, anger, or anxiety.
Psychologists sometimes deceive participants about the true purpose of the experiment in order to prevent experimental subjects from attempting to confirm the scientist's hypothesis.
Thus, the correct option is C.
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What are controlled variables? Give an example.
Answer:
Temperature can be a controlled variable in an experiment. Controlled variables are if something is held constant during an experiment.
Other examples of controlled variable could be:
Amount of light
Using the same type of glassware
Constant humidity
Hope this helped you understand what controlled variable are!
Answer:
here you go
Explanation:
Examples of Controlled Variables
Temperature is a common type of controlled variable. If a temperature is held constant during an experiment, it is controlled. Other examples of controlled variables could be an amount of light, using the same type of glassware, constant humidity, or duration of an experiment.
Question 38(Multiple Choice Worth 2 points)
[OSS.01]The theories surrounding the formation of our solar system are based on many
biased opinions
incorrect facts
non-testable data
scientific investigations
Answer:Scientific Investigations
Explanation:
