urgent pls help
Which of the following best explains why the sand at the beach is hotter
than the water? *
Answer:
the answer is d. because water has a higher specific heat capacity than sand
The time [tex]t[/tex] in seconds that it takes an object to fall a distance from [tex]d[/tex] ft from rest is given the formula [tex]\sqrt[]{2d/8}[/tex] where g is the acceleration due to gravity. Find the value of d when g = 32 ft/s² and [tex]t[/tex] = 3 s.
Answer:
144 ft
Explanation:
t = √(2d/g)
3 s = √(2d / (32 ft/s²))
9 s² = 2d / (32 ft/s²)
d = 144 ft
Answer:
d = 144 ft
General Formulas and Concepts:
Math
Order of Operations: BPEMDASPhysics
Vertical Kinematics Equation: d = 1/2gt²Gravity g is always equal to 9.8 m/s² or 32 ft/s²Explanation:
Step 1: Define
[tex]t=\sqrt{\frac{2d}{g} }[/tex] - we get this from algebraically solving to t from the kinematics equation
g = 32 ft/s²
t = 3 seconds
Step 2: Solve
Substitute: [tex]3=\sqrt{\frac{2d}{32} }[/tex]Square both sides: [tex]9=\frac{2d}{32}[/tex]Multiply 32 on both sides: [tex]288=2d[/tex]Divide 2 on both sides: [tex]144=d[/tex]Rewrite: [tex]d=144[/tex]A girl dribbling a basketball is running a court that is 100 m in length. It takes her 4.2 seconds to reach the end of the court. Calculate the girl's average speed during this trip.
Divide the distance traveled by the time it took:
(100 m) / (4.2 s) ≈ 23.8 m/s
Which elements from the list below would you expect to have similar properties to sodium? Select all that apply.
Answer:
the third one
Explanation:
Answer:
Beryllium and Calcium
Explanation:
5 points
15. *
15. Which one of the following
quantities is NOT a vector?
A velocity
B acceleration
C distance
D displacement
A
B
С
Answer:
distance is not a vector. it is scalar
atas nacion
What is the mass of a cart that has an acceleration of 5 ms-2 when a net force of 2000 N is applied to it
Answer:
400 kg
Explanation:
Net force equals mass times acceleration.
∑F = ma
2000 N = m (5 m/s²)
m = 400 kg
who is sitting in the rear of their boat in still water, entertains Juliet by playing his guitar. After the song, Juliet, who was sitting in the front of the boat (closest to shore), carefully moves to the rear to plant a kiss on Romeo's cheek. The 100-kg boat is facing shore and the 50 kg Juliet moves towards the 70 kg Romeo. The length of the boat is 4 m, and we can neglect water resistance when the boat moves. How far does the boat move? Does it move toward or away from the shore?
Answer:
Δx = -1.27 m
the boat moves away from the shore
Explanation:
Let's analyze the exercise a little, to know when the boat has moved, we can fixate on a point, let's use the point of the center of mass, before and after the movement of people.
The center of mass is defined by.
[tex]x_{cm}[/tex]= 1 /M ∑ m_i x_i
where M is the total mass of the object, x_i and m_i are the positions and masses of each part of the system.
let's find the total mass
M = m_boat + m_Juliet + m_Romeo
M = 100 + 50 + 70
M = 220 kg
now let's look for the center-mass position
initial. Before the movement of people
x_{cm1} = 1/M (x_boat m_boat + x_juliet m_juliet + x_romeo m_romeo)
Let's find the position of each object, let's fix our reference system on the front of the boat
The boat its center of mass coincides with its geometric center
x_boat = 2 m
Julliet is sitting in the front of the boat
x_juliet = 0 m
Romeo is sitting in the back of the boat
x_romeo = 4 m
we substitute
x_{cm1} = 1/220 (2 100 + 50 0 + 70 4)
x_{cm1} = 2.1818 m
final. After the movement of people
positions
boat
x_boat = 2 m
Juliet
x_juliet = 0 m
Romeo
x_romeo = 0 m
we substitute
x_{cm2} = 1/220 (2 100 + 50 0 + 500 0)
x_{cm2} = 0.9090 m
the movement of the boat is
Δx = x_cm2 - xcm1
Δx = 0.9090 - 2.1818
Δx = -1.27 m
The negative sign indicates that the boat moves in the opposite direction to the movement of people, therefore the boat moves away from the shore
What kind of waves can travel through empty space or a vacuum?
A.Sound
B.Light
C.Frequency
D.Wavelength
Answer:
the answer is B.
Answer:
light
Explanation:
you can see stuff in space but cant hear it
Electric bees. Flying insects such as bees may accumulate a small positive electric charge as they fly. In one experiment, the mean electric charge of 50 bees was measured to be +30 PC per bee. Researchers also observed the electrical properties of a plant consisting of a flower on top of a long stem. The charge on the stem was measured as a positively charged bee approached, landed, and flew away. Plants are normally electrically neutral, so the measured net electric charge on the stem was zero when the bee was very far away. As the bee approached the flower, a small net positive charge was detected in the stem, even before the bee landed. Once the bee landed, the whole plant became positively charged, and this positive charge remained on the plant after the bee flew away. By creating artificial flowers with various charge values, experimenters found that bees can distinguish between charged and uncharged flowers and may use the positive electric charge left by an earlier bee as a cue to indicate that a plant has already been visited (in which case, little pollen may remain).
In a follow-up experiment, a charge of 38 pC was placed at the center of an artificial flower at the end of a 30-cm-long stem. Bees were observed to approach no closer than 17 cm from the center of this flower before they flew away. This observation suggests that the smallest external electric field to which bees may be sensitive is closest to which of these values?
a. 2.4 N/C
b. 16 N/C
c. 2.7 x10^-10 N/C
d. 4.8 x 10^-10 N/C
Answer: E = 11.8 N/C
Explanation: Electric field is electric force per unit of charge or
[tex]E=\frac{F}{q}[/tex]
F is electric force calculated as:
[tex]F=\frac{kQq}{r^{2}}[/tex]
Electric field will be:
[tex]E=\frac{kQq}{qr^{2}}[/tex]
[tex]E=\frac{kQ}{r^{2}}[/tex]
where k is coulomb constant and is approximately [tex]9.10^{9}\frac{Nm^{2}}{C^{2}}[/tex]
Changing units to match the constant:
38pC = [tex]38.10^{-12}[/tex]C
17cm = [tex]17.10^{-2}[/tex]m
So, electric field for bees in the given conditions is:
[tex]E=\frac{9.10^{9}.38.10^{-12}}{(17.10^{-2})^{2}}[/tex]
[tex]E=\frac{342.10^{-3}}{289.10^{-4}}[/tex]
E = 11.8N/C
The smallest external electric field to which bees nay be sensitive is 11.8N/C
Two resistances of 100ohms and 0 ohms were connected in parallel. What is the overall resistance
Answer:
20 ohms,100*2/10=20
Explanation:
since it as to be in parallel arrangement and connected in side by side due to same p.d in a cross each resistor
what was his gift to the pope
The ossicles (the three tiny bones in the middle ear) are responsible for __________.
A.
converting sound vibrations into neural signals
B.
relaying sound vibrations to the eardrum
C.
vibrating in response to sound waves
D.
amplifying sound vibrations from the eardrum
Answer:
It's actually ( D )
Explanation:
NOT B
Answer:
The answer is D. Just took the test
Explanation:
Peace and love and give the other person the brainliest lol
Chloe's mother threatens to ground her for life if she comes home after curfew. Chloe knows her mother cannot follow through with that punishment and comes home late anyway. Chloe's mother should have used which tip for effective punishment?
She should have used a punishment that is really punishing.
She should have punished Chloe immediately after the bad behavior occurred.
She should have remained calm while punishing Chloe to eliminate the chance of abuse.
She should have punished Chole each and every time the bad behavior occurred.
Answer:
The third option
Explanation:
The third option would be the best choice because while staying calm, Cloe will feel guilty and her mother will not be stressed. Staying calm also shows that Cloe's mother loves her but is disapointed, making Cloe think twice about her actions, while yelling and whipping only puts fear into her mind.
You are pulling a sled along a level surface. The weight on the sled increases as some packages are added. How do you think that the force you exert to pull the sled changes?
A. It increases
B. It decreases
C. It remains the same
Answer: A it increases cuz da more heavy the object or whatever the more force u gotta use to pull it
EXTREMELY URGENT! DUE IN 15 MINUTES
Answer:
Antibiotics can only kill bacterial infections. they cant treat viruses because it's a viral infection that spreads through the body
They can't be used to treat infections caused by the Corona or any virus because antibiotics only kill bacterial infections. They can not treat Corona or any virus because it's a viral infection that spreads through out the body.
Questions:
(a) Why should the amplitude of oscillation be small on a pendulum experiment
3. Range of a projectile motion is
maximum at angle of:
О O
А. 180°
В. 75°
С. 45°
D.90
Answer:
a
Explanation:
An object with a mass of 300 kg is
observed to accelerate at the rate of
4m/s ? Calculate the total force
required
Answer:
m= 300
a= 4ms
f = ma
= 300×4
= 1200N
Answer: F = 1200 N
Explanation:
Hey there!
It is given that,
Mass of the object, m = 300 kg
Acceleration of the object when it is moving, [tex]a = 4m/s^{2}[/tex]
If F is the force required to produce this acceleration. It is given by using the second law of motion as :
Calculations
F = m × a
F = 300 kg × [tex]4m/s^{2}[/tex]
F = 1200 N
So, the force required to produce this acceleration is 1200 N. Hence, this is the required solution.
~I hope I helped you! :)~
How does the lens from which you view the world shape your approach to research inquiry?
Why is it important as a scholar-practitioner engaged in research to acknowledge your worldview ?
LEARNING RESOURCES Required Readings
Babbie, E. (2017). Basics of social research (7th ed.). Boston, MA: Cengage Learning.
Chapter 1, “Human Inquiry and Science”
Burkholder, G. J., Cox, K. A., Crawford, L. M., & Hitchcock, J. H. (Eds.). (2020). Research designs and methods: An applied guide for the scholar-practitioner. Thousand Oaks, CA: Sage.
Chapter 1, "Introduction to Research"
Chapter 2, “Philosophical Foundations and the Role of Theory in Research”
Acknowledging one's worldview as a scholar-practitioner is crucial as it influences research inquiry. It shapes research questions, methods, and interpretations. Recognizing biases and being open to diverse perspectives ensures reliable and valid research.
As a scholar-practitioner engaged in research, it is important to acknowledge your worldview because your worldview affects the approach you take to research inquiry. It shapes your research questions, methods, and interpretations. The lens through which you view the world is informed by your background, culture, experiences, and beliefs. Therefore, two scholars may approach the same research question differently based on their worldviews. For instance, a scholar from an individualistic culture may approach a research question on teamwork differently from a scholar from a collectivistic culture. The individualistic scholar may focus on the individual's contribution to the team, while the collectivistic scholar may focus on the team's contribution to the individual.To conduct research that is reliable and valid, it is crucial for the scholar-practitioner to acknowledge their worldview and recognize that it shapes their approach to research inquiry. By acknowledging their worldview, the scholar-practitioner can identify and manage their biases and take steps to minimize them. They can also be open to multiple perspectives and incorporate them into their research to enhance its credibility. In conclusion, acknowledging your worldview as a scholar-practitioner is essential for conducting research that is reliable and valid. It helps you identify and manage your biases and be open to multiple perspectives.For more questions on interpretations
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If the ball is released from rest at a height of .96 m above the bottom of the track on the no slip side
write an essay on the topic my best university
Answer:
My favourite university is the University of Machigan.
Explanation:
The motto boldly reads 'Artes, Scientia, Vertia' at University of Machigan which means Arts, Knowledge, and Truth in Latin. Since I was in high school, I always wanted to acquire education/college degree from a university that lived up to its motto. I had a great interest in Social Science and Humanities and always wanted to make a career out of it. The University of Machigan first came across to me while I was reading a monthly magazine at our school library. I read an article called 'Constructing the System: Government and Stakeholders' written by a college student from the University of Machigan. It had interesting developments and insights which really interested me. In fact, it included a very crucial piece of information which was similar to my own political principles.
I did some further research on papers and programs offered at University of Machigan and I felt that it was just the right university for me. I read numerous papers and articles from different departments which were all very academic oriented. Moreover, I started updating myself with the admission criteria at University of Machigan every year and is currently working really hard to achieve admissions there.
I'm still few months away from graduating high school but I can already feel the excitement to go there. I have faith in my academic records and potentials that I would make it there. I'm planning to take up 'Government and Politics' program since that is what I'm most interested at. I hope I would learn and acquire the best knowledge and opportunity from one of the best universities in US or I must say, my favourite university.
As mass decreases, kinetic energy increases.
Question 1 options:
True
False
Answer: False
Explanation: Kinetic energy and mass are directly proportional. So a decrease in mass would cause a decrease in energy.
False. As mass decreases, kinetic energy also decreases.
The energy possessed by a body due to its motion is called kinetic energy.
If m is the mass of the object moving with a velocity v, then the kinetic energy of the object is given by:
KE= (1/2)m×v²
As given in question mass is decreasing, so kinetic energy also decreases because it is directly proportional to mass.
Therefore, the kinetic energy decrease with a decrease in mass. So, the correct option is "false.
To learn more about Kinetic energy, click here:
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True or false. The number of images formed depends upon the angle between the mirrors.
* ****
yes it's true................
#indian
Jeff is pushing a rock up a hill with a force of 85 N. If Chris comes to help and Chris can push with a force of 60 N, what is the net force on the rock
Answer:
F = 145 N
Explanation:
Given that,
Force applied by Jeff is 85 N and the force applied by Chris is 60 N. Both forces are acting in the same direction to push a rock up a hill. It means that net force is equal to the sum of these two forces.
So,
Net force on the rock = 85 N + 60 N
= 145 N
Hence, the net force on the rock is 145 N.
The diameter of an atom is about 1 angstrom (10-10 m). In order to develop some intuition for the molecular scale of a gas, assume that you are considering 1 liter of air (mostly N2 and 02, with molar masses of 28 g/mol and 32 g/mol respectively) at room temperature and atmospheric pressure (about 105 Pa). As always, be sure to show your work and explain your reasoning.
a) Calculate the number of molecules in this sample of air.
b) Estimate the average spacing between the molecules.
c) Estimate the average speed of a molecule based on the Maxwell-Boltzmann distribution. Convert your answer to miles per hour.
d) Suppose that we scale up the gas so that each atom is the size of a tennis ball. We also scale up the spaces between the atoms proportionally. Now what would be the average spacing between molecules? What would be the mass of a single molecule (assuming that the density of a molecule remains the same)?
Answer:
A) 2.5 * 10^22 molecules
B) 3.33 * 10^-9 m
C) 1134 miles/hour
D) average spacing = 2.1 m , New mass = 17 kg
Explanation:
Given data :
diameter of atom = 10^-10 m
volume of air = 1 liter
molar masses : 28 g/mol of N2, 32 g/mol of O2
atmospheric pressure = 10^5 Pa
attached below is the detailed solution
What atmospheric gas is common in the outer planets but rare in the inner planets
Answer:
hydrogen
Explanation:
OOOO
What are some of the factors that can cause a person to have a single-gene disease or disorder?
Explanation:
When a certain gene is known to cause a disease, we refer to it as a single gene disorder or a Mendelian disorder. For example, you may have heard of cystic fibrosis, sickle cell disease, Fragile X syndrome, muscular dystrophy, or Huntington disease. These are all examples of single gene disorders.
Answer: mitochondrial inheritance patterns, autosomal inheritance patterns, mutations.
Explanation:
In this example we will analyze the forces acting on your body as you move in an elevator. Specifically, we will consider the case where the elevator is accelerating. Suppose that you stand on a bathroom scale that rests on the floor of an elevator. (Don’t ask why!) Standing on the scale compresses its internal springs and activates a dial that indicates your weight in newtons. When the elevator is at rest, the scale reads 600 N. Suppose that the elevator is accelerating downward at 2.50 m/s2 . What does the scale read during the acceleration?
Answer:
The reading of the scale during the acceleration is 446.94 N
Explanation:
Given;
the reading of the scale when the elevator is at rest = your weight, w = 600 N
downward acceleration the elevator, a = 2.5 m/s²
The reading of the scale can be found by applying Newton's second law of motion;
the reading of the scale = net force acting on your body
R = mg + m(-a)
The negative sign indicates downward acceleration
R = m(g - a)
where;
R is the reading of the scale which is your apparent weight
m is the mass of your body
g is acceleration due to gravity, = 9.8 m/s²
m = w/g
m = 600 / 9.8
m = 61.225 kg
The reading of the scale is now calculated as;
R = m(g-a)
R = 61.225(9.8 - 2.5)
R = 446.94 N
Therefore, the reading of the scale during the acceleration is 446.94 N
A student is on a balcony 15.6 m above the street. She throws a ball vertically downward at 10.7 m/s.
What is the velocity of the ball as it strikes the ground?
Answer:
20.65 m/s
Explanation:
You are gonna wanna use a calculator for this one
so we will write all the known variables:
h = 15.6 m
initial velocity (u) = 10.7 m/s
acceleration (a) = 10 m/s/s (gravity)
From the third equation of motion:
v² - u² = 2ah
v² - (10.7)² = 2(10)(15.5)
v² - (10.7)² = 312
v² = 312 + 114.49
v² = 426.49
v = 20.65 m/s
The chemical formula shows the basic unit of sugar.
C12H22011
What makes up a basic unit of sugar?
03 atoms from 5 molecules
O 3 molecules from 45 elements
45 atoms from 3 elements
03 atoms from 45 molecules
