INEGRATED SCIENCE-8th grade science
report cards due dec.18
Please Help ASSSAAAAPPPP! PLEASEEEEEEE
Answers
Answer:
I do drink bottled water but not to often, I live about 2.8 miles away from its water source and if i did'nt drink bottled water and I had to found out how my drinking water is treated I would go ask the people that are taking care of the water.
Explanation:
hope this helps
Related Questions
Explain you own words why energy is considered to be naturals money. Give an example to support your explanation
Answers
Answer:
because we naturally use energy everyday in everyway , energy is also a bill for instance you electric bill used by energy
Explanation:
What is the mass of a crate if a net force of 12 N gives the crate an acceleration of 0.20 m/s2?
Answers
F = ma
Given - F = 12 N
a = 0.20 m/s^2
Solution -
F = ma
12 = m x 0.20
m = 12 by 0.20
m = 60 kg
.:. The mass is 60 kg.
A 0.152 kg ball is attached to a string that is 62.2 cm long. The string will break if subjected to a tension force of 4.8 N. If a small child swings the ball in a horizontal circle around her head, at what velocity will the string break?
Answers
Answer:
The value is [tex]v = 3.68 \ m/s[/tex]
Explanation:
From the question we are told that
The mass the ball is [tex]m = 0.152 \ kg[/tex]
The length of the string is [tex]l = 62.2 \ cm = 0.622 \ m[/tex]
The tension of force that will break the string is [tex]T = 4.8 \ N[/tex]
Generally the radius of the circle made by swinging the string is [tex]r = l = 0.622\ m[/tex]
Generally the centripetal force acting on the ball is mathematically represented as
[tex]F_c = \frac{mv^2}{r}[/tex]
Generally this centripetal force is mathematically represented as
[tex]F_c = T - mg[/tex]
=> [tex]T - mg = \frac{mv^2}{r}[/tex]
=> [tex]4.8 - 0.152 * 9.8 = \frac{0.152 * v^2}{0.622}[/tex]
=> [tex]v = 3.68 \ m/s[/tex]
an object increases its velocity from 22 m/s to 36 m/s in 5s.what is the acceleration of the object
Answers
Answer:
2.8 m/s²
Explanation:
v=v0+at <=> 36 = 22 + a×5 <=> 5a = 36-22 <=> 5a = 14 <=> a = 14/5 <=>
<=> a = 2.8 m/s²
a = v - u by t
Given - u = 22 m/s
v = 36 m/s
t = 5 sec
Solution -
a = v - u by t
a = 36 - 22 by 5
a = 14 by 5
a = 2.8 m/s^2
.:. The acceleration is 2.8 m/s^2.
A 40.0-kg package on a the roller belt conveyor is moving at 0.600 m/s. What is
its kinetic energy? *
O 7.2 J
O 12 J
O 14.4 J
O 0J
O24J
Answers
Answer:
7.2 JExplanation:
The kinetic energy of an object can be found by using the formula
[tex]k = \frac{1}{2} m {v}^{2} \\ [/tex]
m is the mass
v is the velocity
From the question we have
[tex]k = \frac{1}{2} \times 40 \times {0.6}^{2} \\ = 20 \times 0.36 \\ = 7.2[/tex]
We have the final answer as
7.2 JHope this helps you
Describe the effect of speed on voltage
Answers
Answer:
Speed has no effect on voltage.
Explanation:
The voltage of the battery in your car is always 12 to 13.5 volts. It makes no difference whether the car is home in the garage or zooming down the interstate.
Explain how scientist learned about the magnetic poles of the Earth.
Answers
Answer:
there are many way but this may help
Explanation:
The tendency of a magnet to align itself in a north-south direction, so giving a magnetic compass, was discovered by the Chinese about 2000 years ago. Then in 1600 William Gilbert published De Magnete, in which he concluded that the earth behaved as a giant magnet. ...
A car travels east at a constant velocity. The net force on the car is:
Answers
As velocity is constant, a=0
So, F=0
Hope this helps!
why is thouching the live wire of an appliane when it is connecfed to the mains dangerous
Answers
Answer: The live wire is the most dangerous one, since it is at 230 V. it should never touch the earth wire (unless the insulation is between them, of course!), because this would make a complete circuit from your mains supply to the ground (earth). A shock or fire would be highly likely.
Explanation:
Which of the following is an example of the Doppler effect? (2 points)
A. A water bug on the surface of a pond is producing small ripples in the water. The bug is not moving
B. A police car with its siren on is driving towards you, and you perceive the pitch of the siren to increase.
C. Scientists measure the speed of light and find that it is constant.
D. The gravitational pull of two objects on each other
Answers
Answer: B
Explanation:
Your'e asking about how waves get closer and louder A it isn't moving so no, C it's not saying if it's near or not and D is going trough another procedure so that leaves B behind
A car travels 14 km due west, then does a
U-turn, and travels 43 km due west.
I. What total distance has the car
traveled?
II.
What is the total displacement of the
car?
III. If the entire trip took 3.20 hours.
determine the average speed of the
car. Give
your answer in both
km hour, and m s. (show
conversion)
IV. If the entire trip took 2.50 hours.
determine the average velocity of
the car. Give your answer in both
km h, and mph (show conversion)
Answers
Explanation:
It is given that,
A car travels 14 km due west, then does a U-turn and travels 43 km due east (when it takes U-turn, it will change direction from west to east)
i. Total distance = total path covered
= 14 km + 43 km
= 57 km
ii. Let east is positive and west is negative.
Displacement = final position-initial position
= 43-14
= 29 km
iii. If time taken in the entire trip = 3.2 hours
Average speed = distance/time
[tex]s=\dfrac{57\ km}{3.2\ h}\\\\=17.81\ km/h[/tex]
1 km/h = 0.2777 m/s
17.81 km/h = 4.94 m/s
iv. If time taken in the entire trip = 2.5 hours
Average velocity = displacement/time
[tex]v=\dfrac{29\ km}{2.5\ h}\\\\=11.6\ km/h[/tex]
1 km/h = 0.621 mph
11.6 km/h = 7.2 mph
Henc, this is the required solution.
What causes wind?
A
The sun stops the wind throughout the afternoon as everything warms up.
B
The sun causes waves to be larger by directing solar energy into the water.
C
The sun heats land quickly and as the warm air rises, cool air comes in to take it place.
D
The sun reflects off the water, making the air above the water unstable and more likely to move.
Answers
Answer:C
Explanation:
The sun heats land quickly and as the warm air rises, cool air comes in to take it place.
Answer:
C
Explanation:
What wavelength would a ripple in water have if the frequency is 1.8 Hz and a
wave speed of 825 m/s?
Answers
Explanation:
825m/s / 1.8Hz = 458.33m
λ=v/f
λ-wavelength
v-speed
f-frequency
λ=825/1.8=458.33m
the strongly blown ballon gets blasted why?
Answers
Answer:
Because of pressure.
Thanks
Explanation:
The pressure bursts out the balloo
Select the correct answer.
Which two factors does the power of a machine depend on?
Α. work and distance
B. force and distance
C. work and time
D. time and distance
Answers
Answer: C. work and time
Explanation: hope this helps
The voltage between two points in a circuit is 4.2 V. If the resistance between
the points is 72, what is the current, according to Ohm's law?
A. 0.058 A
B. 76.2 A
O C. 17.1 A
O D. 302 A
Answers
Answer:
I = 0.058 [A]
Explanation:
Ohm's law is defined as voltage equal to the product of current by resistance.
[tex]V =I*R[/tex]
where:
V = voltage = 4.2 [V]
I = current [amp]
R = resistivity = 72 [ohm]
Now clearing I, we have:
[tex]I = V/R\\I = 4.2/72\\I = 0.058 [A][/tex]
Answer:
A. 0.058 A
Explanation:
Which of the following for an object should be known to calculate its density? (5 points)
A.the heat present in it
B.The amount of matter in it
C.The force of gravity acting on it
D.The space between the object and another object
Answers
explaination
a person has gotten a new job with a much higher salary. he plans to spend his extra money on a new car and a great stereo system for his apartment.
Answers
Answer:
He will get a higher sales and income tax
Explanation:
just took the quiz and got it right
The person with a new job of a much higher salary and a new car and a great stereo system for his apartment, will attract more tax.
Effect of tax on higher salaries and properties
PAYE which is an acronym for pay as you earn, is a form of tax deducted by an employer from the employee's salaries and wages.
As the person earns higher, his income tax increases, as he acquires more luxury properties, his personal tax increases as well.
Thus, the person with a new job of a much higher salary and a new car and a great stereo system for his apartment, will attract more tax.
Learn more about taxes here: https://brainly.com/question/1775528
#SPJ2
please help !!!!! I’ll give brainliest !
Answers
Answer:
Honestly for me it's a bit too blurry. Sorry luv.:(
Explanation:
What is the awnser to that question
Answers
When electrons are moving freely between many positive ions, what type of bond is occuring?
a
metallic
b
ionic
c
covalent
d
crystalline
Answers
Answer:
a metallic
Explanation:
Metal atoms are joined together by metallic bonds. Metals can form cations (positive ions) with a sea of delocalized electrons.
what is meant by absolute zero temperature?
Answers
Answer:
Absolute zero, temperature at which a thermodynamic system has the lowest energy. It corresponds to −273.15 °C on the Celsius temperature scale and to −459.67 °F on the Fahrenheit temperature scale.
How are electrons involved in the formation of a bond between atoms?
Answers
Answer:
5
Explanation:
electrons can be more than det
Studying neutrinos helped to explain how our Sun works but led to changes in theories of particle physics, how is this process consistent with the scientific process? How can details about a theory be adjusted without undermining other discoveries made through the theory's predictions?
Answers
Explanation:
Yes, evidently, the process is consistent with the scientific process because in scientific process falsification and modification are two very important traits. So this new concept have modified the existing theories.
Through the modification a theory is adjusted without undermining other discovering made through the theory's prediction.
There are many other evidences that prove this fact for example Einstien's Theory of relativity also changes the existing concepts.
malnourishment is harmful during
Answers
Answer:
People who are in good health at the beginning of a hunger strike "are usually at little risk of dying from malnutrition for at least six to eight weeks," the guidelines state. But people who are ill can die from malnutrition in as little as three weeks. Malnutrition during pregnancy can be quite harmful. Maternal malnutrition during pregnancy can affect the wellbeing and development of the baby. Malnutrition is when the baby and in this case, the mother do not receive adequate nourishment during pregnancy. It means the baby, in the mother’s womb does not get enough nutrients to grow.
Hope this helps!
A 1 kg puck sliding on a horizontal shuffleboard court is slowed to rest by 1 point
a frictional force of 3 N. What is the coefficient of kinetic friction between
the puck and the surface of the shuffleboard court? *
O A. 0.25
O B.0.5
O c.0.15
D. .31
Answers
Answer:
miu = 0.31
Explanation:
The friction force is defined as the product of the normal force by the coefficient of friction.
[tex]f=miu*N[/tex]
where:
f = friction force = 3 [N]
miu = friction coefficient
N = normal force [N]
The normal force on a horizontal surface can be calculated by means of the product of mass by gravity.
where:
m = mass = 1 [kg]
g = gravity acceleration = 9.81 [m/s²]
[tex]N=m*g\\N=1*9.81[/tex]
[tex]N= 9,81 [N][/tex]
Now replacing in the equation above, we can find the friction coefficient.
[tex]miu=3/9.81\\miu = 0.31[/tex]
A man has a mass of 85 kg. What is his weight?
Answers
he weights 187.393 pounds
Answer:833N
Explanation: A. P. E. X.
Hee Sun drew an electron dot diagram of a silicon atom as shown.
S i with 1 dot each above, right, below, left.
In addition to changing the symbol to C, how would this diagram compare with an electron dot diagram of a carbon atom (C)?
The dot to the left of the symbol would be removed in the diagram for carbon.
The same number of dots would appear in the diagram for carbon.
There would be two dots above and to the right of the symbol in the diagram for carbon.
The single dots would be replaced with two dots on each side of the symbol in the diagram for carbon.
Answers
Answer:
B
Explanation:
I took the test uwu
Answer:
B. The same number of dots would appear in the diagram for carbon.
Explanation:
took the test and got 100%
3. Riddle:
I am black when you buy me, red when you use me and grey when you throw me away.
What am I?
Answers
Answer:
The answer is charcoal
Answer:
Charcoal
Explanation:
Which is an example of negative acceleration?