Answer: 1: A constellation position in the night sky can be used to predict events in a personal life
2: certain mineral crystals have properties that help protect the body From illness
Explanation: I just took the test
Photo shows all! Need help ASAP! Will mark brainlist
Answer:
The student is getting different info bc the students probable keeping track of the distance instead of the displacement.
Explanation:
Which statement is a scientific theory?
A. Most cells are so small that they can be observed only through a
microscope.
B. The interactions between cells can be predicted with
mathematical equations.
O C. Cells are the fundamental units of all living organisms.
O D. The various functions of different types of cells can be determined
by experiments.
Answer:
A.
Explanation:
Answer: C : Cells are the fundamental units of all living organisms.
Explanation: took the quiz
A swimming pool has the shape of a right circular cylinder with radius 21 feet and height 10 feet. Suppose that the pool is full of water weighing 62.5 pounds per cubic foot. The work W required to pump all the water to the top of the pool is given by W = 4329507.37572 Correct: Your answer is correct. foot-pounds. The work W required to pump all the water to a platform 2 feet above the top of the pool is given by W = foot-pounds.
Answer:
The water required to pump all the water to a platform 2 feet above the top of the pool is is 6061310.32 foot-pound.
Explanation:
Given that,
Radius = 21 feet
Height = 10 feet
Weighing = 62.5 pounds/cubic
Work = 4329507.37572
Height = 2 feet
Let's look at a horizontal slice of water at a height of h from bottom of pool
We need to calculate the area of slice
Using formula of area
[tex]A=\pi r^2[/tex]
Put the value into the formula
[tex]A=\pi\times21^2[/tex]
[tex]A=441\pi\ feet^2[/tex]
Thickness of slice [tex]t=\Delta h\ ft[/tex]
The volume is,
[tex]V=(441\pi\times\Delta h)\ ft^3[/tex]
We need to calculate the force
Using formula of force
[tex]F=W\times V[/tex]
Where, W = water weight
V = volume
Put the value into the formula
[tex]F=62.5\times(441\pi\times\Delta h)[/tex]
[tex]F=27562.5\pi\times\Delta h\ lbs[/tex]
We need to calculate the work done
Using formula of work done
[tex]W=F\times d[/tex]
Put the value into the formula
[tex]W=27562.5\pi\times\Delta h\times(10-h)\ ft\ lbs[/tex]
We do this by integrating from h = 0 to h = 10
We need to find the total work,
Using formula of work done
[tex]W=\int_{0}^{h}{W}[/tex]
Put the value into the formula
[tex]W=\int_{0}^{10}{27562.5\pi\\times(10-h)}dh[/tex]
[tex]W=27562.5\pi(10h-\dfrac{h^2}{2})_{0}^{10}[/tex]
[tex]W=27562.5\pi(10\times10-\dfrac{100}{2}-0)[/tex]
[tex]W=4329507.37572[/tex]
To pump 2 feet above platform, then each slice has to be lifted an extra 2 feet,
So, the total distance to lift slice is (12-h) instead of of 10-h
We need to calculate the water required to pump all the water to a platform 2 feet above the top of the pool
Using formula of work done
[tex]W=\int_{0}^{h}{W}[/tex]
Put the value into the formula
[tex]W=\int_{0}^{10}{27562.5\pi\\times(12-h)}dh[/tex]
[tex]W=27562.5\pi(12h-\dfrac{h^2}{2})_{0}^{10}[/tex]
[tex]W=27562.5\pi(12\times10-\dfrac{100}{2}-0)[/tex]
[tex]W=1929375\pi[/tex]
[tex]W=6061310.32\ foot- pound[/tex]
Hence, The water required to pump all the water to a platform 2 feet above the top of the pool is is 6061310.32 foot-pound.
If you get a ticket for speeding, it is based on your average speed or instantaneous speed? Explain
Answer:
Instantaneous speed
Explanation:
Usually the speed measuring guns are used to measure the speed at a certain instant, so the measured speed is instantaneous.
The average speed is determined by the expression final distance minus initial distance divided by time
[tex]v_{aver} =\frac{x_{f}- x_{i}}{t}[/tex]
The instantaneous speed is determined in the same way as the average, but with the exception that the travel displacements are shorter (very close one each other).
What is the correct answer ?
Answer:
c
Explanation:u
How many hydrogens are in 3 molecules of H20?
Answer:
1 atom of oxygen
2 atoms of hydrogen in each molecule
Each water molecule contains 3 atoms making the H2O formula
Distance between Ranjan and Gomes house is 9km. Ranjan has to attend Gomes birthday party at 7 o'clock. He started from his home at 6 o'clock on his bicycle and covered a distance of 6km in 40 minutes. At that point he met David and he spoke to him for 5minutes and reached Gomes birthday party at 7 o'clock. At what speed did he cover the second part of the journey? Calculate his average speed for the entire journey.Required to answer.Single line text.
Answer:
Kindly check explanation
Explanation:
Given the following :
Distance between Ranjan and Gomez house = 9km
Start time = 6'o clock
Time he arrived at Gomes house = 7'o clock
Time used for chatting during this period = 5 minutes
Distance covered in 40minutes = 6km
Time spend for second part of the journey = (60 - (40 + 5))minutes = 15 minutes = 15/60 = 0.25 hoir
Distance covered during second part of journey = 9 - 6 = 3 km
Speed = distance / time
Speed = 3km / 0.25 hr = 12km/hr
Average speed for entire journey :
First part :
Speed = distance / time
Time = 40 minutes = (40/60) = 0.667 hour
Speed = 6km / 0.667 hour = 9km / hr
Average speed :
(First part + second part) / 2
(9km/hr + 12km/hr) / 2 = 21km/hr / 2 = 10.5 km/hr
= 10.5km/hr
Solve for velocity in A car has traveled 456 meters in 45 seconds while driving east on Broad Street. What is the velocity of the car?
Answer:
10.13
Explanation:
take note that velocity is distance over time ([tex]v=\frac{d}{t}[/tex]) so you do 456(distance)÷45(time)= 10.13
The velocity ratio of a pulley system is 4. What does it mean?
Please answer
Answer:
The force ratio of a machine is 5 and it velocity ratio is 5 means that the load moved is five times the effort applied and the distance moved by the effort is five times the distance moved by the load at the same time interval.
Explanation:
If velocity of a particle is given by v=10+2t² m/s, the average acceleration between 2 sec and 5 sec is?
Answer:
14 m/s^2
Explanation:
Use the formula to get the velocities at 2, and 5 seconds.
Then use the average acceleration formula.
what metal can you melt using 1000 degress celcius
If you'll looking for a metal that melts at exactly 1000 degrees celcius, then Red Brass melts at exactly 1000 degrees celcius
A psychopathologist records the number of criminal offenses among teenage drug users in a nationwide sample of 1,201 participants. To measure the variance of criminal offenses, he computes SS = 10,800 for t his sample. Compute the standard deviation.
Answer:
Standard deviation = 3
Explanation:
Given
[tex]N = 1201[/tex]
[tex]SS = 10800[/tex]
Required
Determine the standard deviation
First, we need to determine the variance;
[tex]Variance = \frac{SS}{N - 1}[/tex]
This gives:
[tex]Variance = \frac{10800}{1201 - 1}[/tex]
[tex]Variance = \frac{10800}{1200}[/tex]
[tex]Variance = 9[/tex]
Know that:
[tex]Variance = SD^2[/tex]
Where SD represents standard deviation
This gives
[tex]9 = SD^2[/tex]
Take square root
[tex]SD = \sqrt 9[/tex]
[tex]SD = 3[/tex]
what is involved in the 2nd step of the Scientific method??helpppppp asappp
Answer:
The second step of the scientific method is the question being researched, the hypothesis. ... This hypothesis includes the explanation for the observation, it can be tested, and new conclusions may be reached. The third step of the scientific method is the experiment.
Explanation:
Answer:
The second step of the scientific method is the question being researched, the hypothesis. This hypothesis includes the explanation for the observation, it can be tested, and new conclusions may be reached. The third step of the scientific method is the experiment.
Explanation:
1. What occurs when there is a change in position of an object with respect to a reference starting point?
A. Directions
B. Motion
C. Position
D. Displacement
Answer:
Motion
Explanation: Enjoy! :)
The way in which objects exert forces on each other is described by
It takes a slug 20 minutes to travel from the grass to the trash can , a trip of 15 meters. How far could the slug travel in 60 minutes (help me please)
Answer:
45 meters
Explanation:
20 min = 15 meters
So if 20 x 3 = 60
you have to do 3 x 15 !
- which equals to 45 <3
- mark me brainlest pls .
A car accelerates uniformly in a straight line
from rest at the rate of 3.7 m/s2.
What is the speed of the car after it has
traveled 63 m?
Answer in units of m/s
Answer:
21.59 m/s
Explanation:
recall that one of the equations of motions can be expressed as
v² = u² + 2as
where,
v = final velocity (we are asked to find this)
u = initial velocity = 0m/s (because it says that it starts from rest)
a = acceleration = 3.7m/s²
s = distance travelled = 63 m
simply substitute the known values above into the equation:
v² = u² + 2as
v² = 0² + 2(3.7)(63)
v² = 466.2
v = √466.2
v = 21.59 m/s
Which is not a cell theory ?
A: All non - living things are made of cells
B: All cells come from pre - existing cells
C: Cells are the basic unit of structure and function of all living things
1. In which scenario is the force
of gravity the strongest
between the two objects?
Explain.
2. If the objects in scenario B
represent planets, on which
planet would you weigh less?
Use the terms, mass, weight,
and gravity in your answer.
Answer:
B
Explanation:
A would mean that the two heavier objects would slowly join together.
C would mean that the two objects may not be close enough together.
B the object is at a decent distance and the smaller onject because it contains a smaller mass and therfore would be lighter, would basically fly at the larger object.
I hope that makes sense. My brain and explanations are a bit different lol.
Where does the heat come from that creates the motion for continental drift?
A) The earth’s core
B) The earth’s mantle
C) The earth’s crust
D) The earth’s atmosphere
Answer:
The heat doesn't come from any of those the heat comes from the Sun
Explanation:
But the thing that holds the heat from the Sun is the Earth's atmosphere.
When he gets hot the carbon dioxide holds in the heat but when the when oxygen it meets the heat in the air it makes it become cooler
E-mail is usually a poor choice for the distribution of sensitive electronic files because
A paper copies seem more official than e-mail
B. not all computers can read e-mails correctly
C. it is easy to send e-mail to the wrong person
D. e-mail is saved on the server that transfers it
Answer:
it's D
Explanation:
its on edge
Which statement describes ionic compounds?
Ionic compounds are positively charged.
lonic compounds are neutral.
Ionic compounds are negatively charged.
Which statement can be supported by using a position-time graph?
A negative slope results when an individual is moving away from the origin.
A horizontal line on the graph means the individual is moving at a non-zero velocity.
A positive slope results when an individual is moving away from the origin.
The speed of an individual cannot be determined from this type of graph.
Column A should be “Time,” and Column B should be “Position.”
Column A should be “Position,” and Column B should be “Time.”
Column A should be “Velocity,” and Column B should be “Speed.”
Column A should be “Speed,” and Column B should be “Velocity.”
Answer:
Explanation:
Think about the equation for velocity. Its the change in position over the change in time. And now think about the formula for slope, its the change in y over the change in x. Now, if you have a position vs time graph, the slope is position over time, the direct formula for velocity. Therefore, the slope of a position vs time graph gives the velocity in that interval. You could take the derivative at that point and get the instantaneous velocity.
In the first argument, the only way to get a negative slope is if youre moving to the left of your initial position as you pass through time. So the claim isnt necessarily true. When you move away from the origin, that simply means youre moving through time.
In the second argument, a horizontal slope means the value is 0. That means there is a value of 0 for your velocity, aka standing still.
In the third argument, a positive slope means youre moving to the right of your initial position as you go through time.
The fourth one is incorrect. Speed is the magnitude of velocity, and the slope can be determined an any point besides vertical slopes, which would require time to literally stop.
I dont understand the very last part of what you posted, so try to make a decision based on what I just explained to you
Answer:
The answer should be
"A positive slope results when an individual is moving away from the origin."
Also known as C on ed 2020
Explanation:
I hope you get this right even tho I may be late, but to all the others who have this question. Stay safe!!!!
Michelle loves basketball, but she recently broke her wrist after falling on the court. The doctor has suggested that she avoid any activity that could jeopardize her recovery or cause further injury until the cast comes off. To modify her activity to maintain her aerobic fitness level, she can (5 points)
Answer:
start running with a arm satchel to keep her arm from moving but still allowing for her legs and lungs to work.
Explanation:
What is the acceleration of a racing car if it’s speed is increased uniformly form 44m/s to 66 m/s over an 11 sec. period.
Answer:
[tex]a=2\ m/s^2[/tex]
Explanation:
Given that,
Initial velocity, u = 44 m/s
Final velocity, v = 66 m/s
Time, t = 11 s
Acceleration = rate of change of velocity
[tex]a=\dfrac{v-u}{t}\\\\a=\dfrac{66-44}{11}\\\\a=2\ m/s^2[/tex]
So, the acceleration of the car is [tex]2\ m/s^2[/tex].
What unit of measurement do we used for an object’s length, height, & width?
Answer:
metre
Explanation:
the metre is the standard unit of measurement for those distances
A spaceship is traveling through deep space towards a space station and needs to make a course correction to go around a nebula. The captain orders the ship to travel 1.7 ✕ 106 kilometers, then turn 70° and travel an additional 2.7 ✕ 106 kilometers to reach the space station. If the captain had not ordered a course correction, what would have been the magnitude and direction of the path of the spaceship if it has traveled through the nebula?
Answer:
Magnitude = 3.64 × [tex]10^6[/tex]
စ = 43.9°
Explanation:
given data
ship to travel = 1.7 × [tex]10^6[/tex] kilometers
turn = 70°
travel an additional = 2.7 × [tex]10^6[/tex] kilometers
solution
we will consider here
Px = 1.7 × [tex]10^6[/tex]
Py = 0
Qx =2.7 × [tex]10^6[/tex] cos(70)
Qy= 2.7 × [tex]10^6[/tex] sin(70)
so that
Hx = Px + Qx ............1
Hx = 2.62 × [tex]10^6[/tex]
and
Hy = Py + Qy ..........2
Hy = 2.53 × [tex]10^6[/tex]
so Magnitude = [tex]\sqrt{((2.62 \times 10^6 )^2+(2.53 \times 10^6)^2)}[/tex]
Magnitude = 3.64 ×
so direction will be
tan စ = Hy ÷ Hx ......................3
tan စ = [tex]\frac{2.53}{2.62}[/tex]
tan စ = 0.9656
စ = 43.9°
Under what situation can an object experience multiple forces, but yet experience no acceleration
a
An object can experience multiple forces, so long as the net force is zero
b
An object can experience multiple forces, so long as they all act in the same direction
c
An object can experience multiple forces, so long as the mass is proportional
d
An object can experience multiple forces, so long as they are all the same type of force
Answer: A
Explanation:
As long as the net force of the multiple forces is zero there will be no acceleration.
GIVING BRAINLIEST!! HELP ASAP!! (use the photo for help)
a. Energy is unknown
b. Energy is destroyed
c. Energy does not freely move
d. Energy freely moves
what is someone who leaves there country to settle in another?
Answer:
an immigrant
Explanation:
Answer:
it is an immigrant
Explanation:
