ITS A a AAA A A a A A A A A A A
hai điện tích điểm bằng nhau có độ lớn 6.10^-8C đặt cách nhau một khoảng là r trong dầu hỏa có hằng số điện môi E=2,1. Lực tương tác tĩnh điện giữa chúng laf3,85.10^-4. tìm r
Answer:
hai điện tích điểm bằng nhau có độ lớn 6.10^-8C đặt cách nhau một khoảng là r trong dầu hỏa có hằng số điện môi E=2,1. Lực tương tác tĩnh điện giữa chúng laf3,85.10^-4. tìm r
Từ độ cao 100 m người ta thả một vật thẳng đứng xuống với v = 10 m/s, g = 10 m/s2 . a. Sau bao lâu vật chạm đất. b. Tính vận tốc của vật lúc vừa chạm đất.
Answer:
10 points dapat yawa aman daw gud
Câu 1. Một ôtô đang chạy với vận tốc 54km/h thì tài xế hãm phanh, sau 10 giây tốc độ của ôtô là 36km/h.
a) Tìm gia tốc của ôtô?
b) Tìm quãng đường ôtô đi được trong thời gian hãm phanh?
c) Tinh vận tốc của ôtô sau 16 giây kể từ lúc hãm phanh?
Câu 2. Từ độ cao 80m so với mặt đất, thả một vật rơi tự do. Lấy g = 10 m/s2
a) Tính thời gian vật rơi?
b) Tính vận tốc của vật khi chạm đất?
Câu 3. Một vật có khối lượng 500g đang nằm yên, chịu tác dụng một lục 1,2 N, vật chuyển động nhanh dần
đều.
a) Tìm gia tốc của vật?
b) Tìm quãng đường mà vật đi được sau 1 phút?
c) Tính vật tốc của vật sau 30s kể từ lúc bắt đầu chuyển động ?
d) Sau bao lâu kể từ lúc bắt đầu chuyển động, vật có vận tốc 72km/h?
NEED HELP!!!! 11 POINTS!!!
Mia plays soccer for her high school team. Generally, they start practice by stretching. What kind of stretching should they do before they are warmed up?
A.
ballistic stretching
B.
dynamic stretching
C.
flexibility stretching
D.
static-active stretching
PLEASE NO LINKS
The kind of stretching they should do before they are warmed up is dynamic stretching.
What does dynamic stretching mean?
A dynamic stretch is a movement-based type of stretch. It uses the muscle itself to induce stretching. It differs from traditional "static" stretches because the stretch position is not preserved.
Extend your left foot backward, bend your right foot forward and bend it, and rotate left and right to raise your arms to the sky. Or why not stand and add another kind of gentle twist.
Dynamic stretches are based on movement, while static stretches move the joints as much as possible and hold them for a period of time (usually 30-90 seconds).
Learn more about dynamic stretching here: https://brainly.com/question/1484910
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What does this poem mean:
A lake in the spring
Is a marvellous thing
Changes are on the way
The winter chills cease
with sunlight’s increase.
Cool waters cover the bay.
Water moves round
From surface to ground
Water is mixed this way
Spring storms bring rain
Lake water does gain
With nutrients caught in the fray
Tiny creatures abound
‘Cause algae’s around
The food chain is boosted this way.
the poem seems to be about the seasons transitioning from winter to spring. the poet explains the lake melting, the sunlight coming out, spring storms that add water to the lakes, and the creatures that come back to roam after winter comes to an end. im really sorry if that didnt help.
How am i supposed to know if i should use sin/cos/tan when i have 2 unknowns?
Answer:
a=6.71cm and b= 9.948cm
Explanation:
[tex]\frac{a}{h} = sin(\alpha )\\a=hsin(\alpha )\\\\\\\frac{b}{h} =cos(\alpha )\\b=hcos(\alpha )\\[/tex]
which alpha is 34°
If Ms. Ramirez drops a watermelon from the top of the second-floor fire escape outside her room, and it takes 1.5 seconds to hit the ground, calculate the velocity of the watermelon as it hits the ground.
The velocity of the watermelon as it hits the ground is 14.715 m/s.
Given the data in the question;
Since the Watermelon was dropped from rest,
Initial velocity of the Watermelon;[tex]u = 0m/s[/tex]Time taken for the Watermelon to hit the ground; [tex]t = 1.5s[/tex]We know that, Acceleration due to gravity; [tex]g = 9.81 m/s^2[/tex]Now, we determine the velocity of the watermelon as it hits the ground which is the final velocity.
From the First Equation of Motion:
[tex]v = u + at[/tex]
Now, under gravity, acceleration ''a" will Acceleration due to gravity;[tex]g = 9.81m/s^2[/tex], "v" is the final velocity, "u" is the initial velocity and "t" is the time taken.
So, we substitute our values into the equation
[tex]v = 0m/s\ +\ ( 9.81m/s^2\ * 1.5s )\\\\v = ( 9.81m/s^2\ * 1.5s )\\\\v = 14.715 m/s[/tex]
Therefore, the velocity of the watermelon as it hits the ground is 14.715 m/s
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A car travels 90m north and 50 m south. What is the total displacement?
Answer: 40 m
Explanation:
90 - 50 = 40 m
please give me a brainliest answer
What happens to an object's atoms when the object becomes positively charged?
True or False: Parasites use the host's fluids/tissues for nutrients.
Answer:
true
Explanation:
its true becuse i did this at school today.
inattention hyperactivity and impulsivity are characteristics of
Answer:
ADHD, also called attention-deficit disorder, is a behavior disorder, usually first diagnosed in childhood, that is characterized by inattention, impulsivity, and, in some cases, hyperactivity.
Explanation:
Velocity:
How far would a bird travel if it is flying south for the winter at 5m/s for 1 week
Answer:
Birds in migration can travel as far as 16,000 miles. To reach their destination in time, some travel at speeds of 30mph.
what is the use if having a control condition in an investigation
Answer:
Thus, including a control condition allows researchers to compare the way things are in the presence of an independent variable with the way things would have been in the absence of an independent variable.
Explanation:
Thus, including a control condition allows researchers to compare the way things are in the presence of an independent variable with the way things would have been in the absence of an independent variable.
the energy stored in chemical bonds *
Answer:
Chemical energy (Also considered potential energy)
Explanation:
if the distance is 207m what is the time
Answer:
That depends on your average speed and the number of stops you make. However, assuming you could average 55 miles per hour for the entire distance, your total driving time would be about 3 hours and 45 minutes.
A car accelerates uniformly in a straight
line from rest at the rate of 3.3 m/s^2
What is the speed of the car after it has
traveled 60 m?
h
Answer in units of m/s.
how Long does it take the car to travel 60m?
answer in units of s
Answer: see below
Explanation:
The intial speed is u=0[tex]\frac{m}{s}[/tex]
The acceleration is a= 3.3[tex]\frac{m}{s}^2[/tex]
The distance is s=60m
Apply the equation of motion
[tex]v^{2}[/tex]=[tex]u^{2}[/tex]+2as
So,
[tex]v^{2}[/tex]=0+2*3.3*60=396
v=[tex]\sqrt{396}[/tex] = 19.89 m/s ≈20 m/s
Applying the equation of motion
v=u+at
t= [tex]\frac{v-u}{a}[/tex] =[tex]\frac{19.89-0}{3.3}[/tex] = 6.02seconds
whats the kinetic energy please help me ive been stuck for a while
Answer:
k=1/2mv²
Explanation:
k is the kinetic energy
m is mass
and v is velocity/speed
How did the river cause the canyon to form?
Answer options with 4 options
A.
The motion of water compacted soil until it became sedimentary rock.
B.
The motion of water wore away and transported rock away from the area.
C.
The motion of water prevented rock layers from forming beneath the water.
D.
The motion of water prevented plants and animals from forming the land in the river bed.
Answer:
A
Explanation:
because the water carRies but also compacts
anyone would like to help?
1. Yes. They are located and distributed around the earth (not randomly though)
2. No. They are usually located in distinct zones relating to tectonic plates
3. Yes. They are mostly in the region where plate boundaries are found.
4. Yes.
5. No. They are connected to plate tectonic theory of divergent, convergent, and transform plate boundaries.
6. Yes.
7. No. They are located in various regions around the world.
8. Yes. Divergent and convergent plate boundaries are likely to produce volcanoes.
9. Yes.
10. No. Mountain ranges are formed when continents collide. These collisions can produce earthquakes, and many of these mountain ranges include volcanoes.
An atom loses an electron. What will happen when it approaches a positively-charged ion?
a
The ions will repel each other.
b
The ions will attract each other.
c
The ions will cancel each other out.
d
The ions will neither attract nor repel each other.
Describe what happens when there is no Friction and you stop pushing on that object?
Describe what happens when there is Friction and you stop pushing on an object?
Are your answers to questions 1 and 2 the same? Why or why not? What causes that to be the same or different?
I give Brainliest!
Answer: see below
Explanation:
1) An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
Friction opposes relative motion. In its absence, a moving object will not stop.
2) If you stop pushing, the force of kinetic friction will produce an acceleration in the opposite direction of the velocity, and the object will slow down and stop.
3) No they are not the same, as one has friction and the other has no friction.
If a 2kg block of copper is heated and a temperature increase of 50C is measured, how much energy has been provided?
Explanation:
Given : S=400Jkg
−1
C
−1
and L
f
=3.5×10
5
Jkg
−1
Mass of copper block m=2kg
Heat released by the copper block is equal to the heat gained by the ice to melt.
Let the mass of the ice melted be M.
Change in temperature of copper block ΔT=500−0=500
o
C
∴ mS(ΔT)=ML
f
Or 2×400×500=M×3.5×10
5
⟹ M=1.14kg
hope it help u
We have that If a 2kg block of copper is heated and a temperature increase of 50C is measured,the energy has been provided is
E=418KJ
From the question we are told
If a 2kg block of copper is heated and a temperature increase of 50C is measured, how much energy has been provided?
Generally the equation for the Energy is mathematically given as
[tex]E=mC(T_1-T_2)\\\\E=2*4180(50)\\\\E=418000J\\\\E=418KJ[/tex]
Therefore
If a 2kg block of copper is heated and a temperature increase of 50C is measured,the energy has been provided is
E=418KJ
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https://brainly.com/question/23379286
An inductor is connected to a 24volts , 50 Hz main supply . If the current through the inductor is 1.5A , calculate the inductance of the inductor. ( Take π = 22/7 )
Explanation:
Correct Answer: Option D
Explanation
X L=V/I=24/1.5=16Ω
L = XL/2πf=16/2π50
= 0.05H
hope this helps you.
Answer:
Hello There!!
Explanation:
I believe the answer is=>5.1 x 10-2H
Here's the explanation:↬
•XL= V/I= 24/1.5= 16Ω
•L= XL/2πf= 16/2π50
So the answer is 0.05H.
hope this helps,have a great day!!
~Pinky~
Please help I'll mark brainliest
Answer:
B. 5Ω
Explanation:
Equivalent resistance between point P and Q
= 3Ω + Tp
Total Parallel resistance, Tp
[tex] \frac{1}{Tp} = \frac{1}{12Ω} + \frac{1}{6Ω} + \frac{1}{4Ω} [/tex]
[tex]\frac{1}{Tp} = \frac{1}{12Ω} + \frac{2}{12Ω} + \frac{3}{12Ω} [/tex]
[tex]\frac{1}{Tp} = \frac{6}{12Ω}[/tex]
[tex]6(Tp) = 12Ω[/tex]
[tex]Tp = \frac{12Ω}{6} [/tex]
[tex]Tp = 2Ω[/tex]
Equivalent resistance between point P and Q
= 3Ω + 2Ω
= 5Ω
Rubric for Grading O Activity3. Answer me! Directions: Compare and contrast the scientific method in philosophy and in science. Complete the Venn Diagram below.(10 pts) Scientific Method in Philosophy Scientific Method in Science
Answer this question fast please i will mark you brainliest
Answer:
respuesta d)
Explanation:
Answer:
b) 72 F°
Explanation:
In Fahrenheit, the difference between freezing and boiling is 180 F° (that’s 212 °F minus 32 °F). In Celsius, the difference is 100 C° (by definition of 0 °C and 100 °C for those two points). So 100 C° = 180 F°; dividing by 100 gives us 1 C° = 1.8 F°.
So a difference of 40 C° is equal to 40 times (1.8 F°) = 72 F°.
Notice I am using °F and °C for actual temperatures, and F° and C° for temperature DIFFERENCES.
Time
This graph shows the results of an experiment where a rubber ball was dropped and the kinetic energy and the potential energy
were tracked. We know that energy can neither be created nor destroyed, only changed in its form. If the blue line shows kinetic
energy and the red line shows potential energy, what can you infer about the relationship between potential and kinetic energy in.
a bouncing ball? Select ALL that apply.
A)
The total amount of energy is always constant.
B)
When potential energy is its highest, kinetic energy is its lowest.
There is a direct relationship between potential and kinetic energy.
D)
When potential energy is its highest, kinetic energy is its highest.
E)
There is an inverse relationship between potential and kinetic energy.
Answer:
A) B) and E)
Explanation:
Which type of graph would best show the data collected from measuring time for a ball to fall from varying heights?
bar graph
scatter plot
Frequency table
circle graph
This is due tonight, can someone pls help me ASAP, TYSM.
what kind of role can you play in your family and locality in terms of population education awareness
Answer:
I can suggest them by making different program about it and I will tell them the importance of less and productive population . Also tell them bad consensus of over population. I also give the technique of stopping over population.
Please help I'll mark brainliest
Explanation:
Electromagnetic Equipment
An electromagnet is a type of magnet with a magnetic field produced by an electric current. Electromagnets are often used in electrical devices that induce heat for cooking such as an oven (OPTION A).
Capacitor
As the voltage increases, the current decreases (OPTION D).
As the capacitor charges up, the potential difference across its plates begins to increase, and by extension circuit current decreases.
what is the point value for scoring in handball
Answer:
one point
Explanation: trust me :)