answer:- external force is 2 N .
The force that impacts the ball motion is external force i.e. 2N.
Given that,
A force of 5N pushes a ball to the right. And a force of 7N pushes the ball to the left.Based on the above information, the calculation is as follows:
= 7N - 5N
= 2N
This 2N represents the external force.
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What is the purpose of radio waves?
Answer:
Explanation:
The prime purpose of radio is to convey information from one place to another through the intervening media (i.e., air, space, nonconducting materials) without wires. Besides being used for transmitting sound and television signals, radio is used for the transmission of data in coded form.
The body loses up to 40 percent of its body heat through the _____ area
Answer:
the correct answer is ( head ) just took it
The body loses up to 40 percent of its body heat through the head area.
What is heat loss rate?The heat transferred to the surrounding by the thermal conductive substance per unit time.
40 to 45 percent of human body heat is lost through the head and neck due to increased blood flow as compared to the rest of the body.
Along with the wrists and ankles, this can be 60 percent.
Thus, the body loses up to 40 percent of its body heat through the head area.
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Question 4 Multiple Choice Worth 4 points)
(02.02 MC)
How do weathering and deposition differ?
Answer:
its A Weathering breaks down rocks; deposition leaves them in new places
Explanation:
Which of the following epidermal layers is made of cells that are constantly dividing?
a. stratum corneum
c. stratum spinosum
b. stratum granulosum
d. stratum basale
epidermal layer is made of basal cell layer that are consulting dividing
A 1200kg car traveling at 45m/s slams on its breaks and slides to a stop. If the coefficient of kinetic friction between the car and the road is 0.85 determine how far the car slides
Given :
A 1200 kg car travelling at 45 m/s slams on its breaks and slides to a stop.
If the coefficient of kinetic friction between the car and the road is 0.85 .
To Find :
How far the car slides.
Solution :
Acceleration is given by :
[tex]ma = \mu_kmg\\\\a = \mu_kg\\\\a = 0.85\times 10\ m/s^2\\\\a = 8.5\ m/s^2[/tex]
Distance covered is :
[tex]2as=u^2-v^2\\\\s = \dfrac{u^2-v^2}{2a}\\\\s=\dfrac{45^2-0^2}{2\times 8.5}\\\\s=119.12\ m[/tex]
Therefore, distance covered is 119.12 m.
Hence, this is the required solution.
A 5 Kg bucket is being lifted by Sue straight up. A)If Sue is lifting the bucket up with constant velocity with what force is she lifting the bucket with? B) If Sue uses the same force and lifted the bucket on the moon which has a gravitational pull of 1.6 m/s2, with what acceleration will the bucket rise?
Answer:
A) Sue is lifting the bucket by a force of 49.035 newtons.
B) The bucket has an acceleration of 8.207 meters per square second on the Moon.
Explanation:
A) According to the First Newton's Law, a system is at equilibrium when it is either at rest or travelling at constant velocity. In this case, Sue must exert an external force on the bucket, whose magnitude is equal to the weight of the bucket but direction is opposed to it. By Second Newton's Law, we find that:
[tex]\Sigma F = F - m\cdot g = 0[/tex] (1)
Where:
[tex]F[/tex] - Lifting force, measured in newtons.
[tex]m[/tex] - Mass of the bucket, measured in kilograms.
[tex]g[/tex] - Gravitational acceleration, measured in meters per square second.
If we know that [tex]m = 5\,kg[/tex] and [tex]g = 9.807\,\frac{m}{s^{2}}[/tex], then the lifting force is:
[tex]F = m\cdot g[/tex]
[tex]F = (5\,kg)\cdot \left(9.807\,\frac{m}{s^{2}} \right)[/tex]
[tex]F = 49.035\,N[/tex]
Sue is lifting the bucket by a force of 49.035 newtons.
B) By the Second Newton's Law, we have the following model:
[tex]\Sigma F = F-m\cdot g = m\cdot a[/tex] (2)
Where [tex]a[/tex] is the net acceleration of the bucket, measured in meters per square second.
If we know that [tex]F = 49.035\,N[/tex], [tex]m = 5\,kg[/tex] and [tex]g = 1.6\,\frac{m}{s^{2}}[/tex], then the net acceleration of the bucket is:
[tex]a = \frac{F}{m} -g[/tex]
[tex]a = \frac{49.035\,N}{5\,kg}-1.6\,\frac{m}{s^{2}}[/tex]
[tex]a = 8.207\,\frac{m}{s^{2}}[/tex]
The bucket has an acceleration of 8.207 meters per square second on the Moon.
(a) The force applied by Sue in lifting the bucket at a constant velocity is 49 N.
(b) The acceleration of the bucket when lifted on the moon is 8.2 m/s².
The given parameters;
mass of the bucket, m = 5 kgThe force applied by Sue in lifting the bucket at a constant velocity is calculated as;
[tex]F = m(a + g)[/tex]
at constant velocity, a = 0[tex]F= mg\\\\F = 5 \times 9.8\\\\F = 49 \ N[/tex]
The acceleration of the bucket when lifted on the moon with the calculated force is;
[tex]F = m(a + g)\\\\a+g = \frac{F}{m} \\\\a = \frac{F}{m} - g\\\\a = \frac{49}{5} - 1.6\\\\a = 8.2 \ m/s^2[/tex]
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scientific laws explain _________
a) why a pattern in nature occurs
b) strong evidence in support of a hypothesis
c) how a pattern in nature occurs
d) a pattern in nature observed over and over
Answer:
Answer:
Explanation:
Explanation:
I think its D.
20 g of water (specific heat of water is 4.18 J / g °C) undergoes a temperature change from 25° C to 20° C. How much heat energy moved from the water to the surroundings?
Answer:
418J
Explanation:
Given parameters:
Mass of water = 20g
Specific heat capacity of water = 4.18J/g°C
Initial temperature = 25°C
Final temperature = 20°C
Unknown:
Amount of heat lost to the surroundings = ?
Solution:
The amount of heat lost to the surrounding is the same as the quantity of heat needed to take down the temperature of the water.
Now, to solve this problem, use the mathematical equation below;
H = m c (T₂ - T₁)
H is the amount of heat
m is the mass
c is the specific heat capacity
T is the temperature
1 and 2 are initial and final states.
Now insert the parameters and solve;
H = 20 x 4.18 x (20 - 25)
H = -418J
The quantity of heat the moved from water to the surrounding is 418J
!!!!Has anybody done the Lab report : Thermal Energy Transfer on edg? For physics
2 pages of data
Answer: the only thing I can't give you is the lab report because I haven't done it yet i dont want to lol.
Explanation:
i got a bunch of answers so if my answers are correct im putting them here
Choose the pair of elements that will most likely have the least ionic character.
a. Na and Cl
b. O and Cl
c. H and O
d. Na and O
Answer:
b. O and Cl
Explanation:
Which climate will have better soil for plant growth? warm or cold climate?, and why.
Answer:
Agriculturally suitable lands have adequate precipitation and moderate temperatures as well as good soils. Farmers regularly have to contend with wet and dry events to grow crops, even in hospitable climates.
Explanation:
Steve and Jose drove Jose's car to the beach during Spring Break. The 495 kilometer drive took them 8 hours and 30 minutes. What was their average speed for the trip?
Answer:
58.24 Km/h.
Explanation:
From the question given above, the following data were obtained:
Distance (d) = 495 Km
Time (t) = 8 h 30 mins
Speed (S) =?
Next, we shall express 8 hours 30 mins to hours.
We'll begin by convert 30 mins to hour.
60 mins = 1 h
Therefore,
30 mins = 30 mins × 1 h/ 60 mins
30 mins = 0.5 hour.
Thus,
8 h 30 min = 8 + 0.5 = 8.5 hours
Speed is define as the distance travelled per unit time. Mathematically, it is expressed as:
Speed = Distance /time
With the above formula, we can obtain the speed as shown below:
Distance (d) = 495 Km
Time (t) = 8.5 hour
Speed (S) =?
Speed = Distance /time
Speed = 495 Km / 8.5 hour
Speed = 58.24 Km/h
Thus, the speed is 58.24 Km/h.
Lizard able to run in ceilings and walls.why?
Answer:
because of their web feet
Explanation:
oke
Answer:
Reptiles have an enormous number of extremely minuscule hairs on the stack of their feet called setae. These little cushions subsequently radically increment the surface zone and come in close contact with the surface on which the reptile is creeping, so the Van der Waals forces kick in.
Explanation:
Hope this helped!
Jackson ran in a marathon for 3 hours. The marathon was 185 miles long. How fast was the runner running?
Answer:
hgt tdyrghgcderhgfe
Explanation:
rghttyhhhggggftttgf d's weyhvfswertfcdsettyhgftgdfvhgg fee e4y
please answer asap its important
Answer:
It is the green answer.
Explanation:
Please mark brianliest.
A basketball rolls down a hill until it comes to a stop in a ditch
A. 1st Law of motion
B. 2nd Law of motion
C. 3rd Law of motion
Answer:
1st law.
Explanation:
Imagine that a loudspeaker is producing a quiet tone with a low pitch. How will its vibrations change:
a. if the pitch of the note becomes higher?
b. if the note becomes louder?
If a wave’s frequency is 16Hz and it’s wavelength is 10m. What’s the waves speed?
Answer:
160J
Explanation:
Given parameters:
Frequency = 16Hz
Wavelength = 10m
Unknown:
Waves speed = ?
Solution:
Waves speed is the product of frequency and wavelength;
Waves speed = fλ
f is the frequency
λ is the wavelength
Now insert the parameters and solve;
Waves speed = 16 x 10 = 160J
When your teacher drops a 1.5kg book from rest, it speeds up as it falls down suppose that book hits the ground at a speed of 5m/s what hight was it dropped from
Answer:
The height in which the book is dropped from is 1.28 m.
Explanation:
Mass of the book, m = 1.5 kg
initial velocity of the book, u = 0
final velocity of the bok, v = 5 m/s
The height in which the book is dropped from is given by;
v² = u² + 2gh
v² = 0 + 2gh
v² = 2gh
h = v² / 2g
h = (5)² / (2 x 9.8)
h = 1.28 m
Therefore, the height in which the book is dropped from is 1.28 m.
a current of 2a is switched on for 8 seconds calculate how much charge flows
Answer:
16C
Explanation:
since current=CHARGE/TIME
THEREFORE CHARGE=TIME X CURRENT
=2X8
=16C
how are electrical current measured
Answer:
ammeter
Explanation:
hope this helps
A skier descends a mountain at an angle of 35.0º to the horizontal. If the mountain is 235 m long, what are the horizontal and vertical components of the skier's displacement?
Which of the following statements about the unit of measurement called the Newton is true? Select the two correct answers.(1 point)
As an object's distance from Earth increases, its Newtons increase.
The Newton is used to measure gravitational force.
The Newton is used to measure mass of objects.
An object with a mass of 1 kilogram has a gravitational attraction to Earth of about 9.8 Newtons.
Answer:
The Newton is used to measure gravitational force.
An object with a mass of 1 kilogram has a gravitational attraction to Earth of about 9.8 Newtons.
Explanation:
The two true correct statements about the unit of measurement called the Newton are ,
Newton used to measure gravitational force.
An object with a mass of 1 kilogram has a gravitational attraction to Earth of about 9.8 Newtons.
Therefore the correct answers are the option c and option D
What is Newton's second law?Newton's Second Law states that The resultant force acting on an object is proportional to the rate of change of momentum.
The mathematical expression for Newton's second law is as follows
F = ma
Where F represents the force.
The SI unit of force is Newton.
Newton used to measure gravitational force.
An object with a mass of 1 kilogram has a gravitational attraction to Earth of about 9.8 Newtons.
Thus, the correct answers are the option C and option D
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Connie flew from Phoenix to flagstaff, a distance of 180 miles at a constant speed of 180 miles per hour. She then returned to the same airport at a cj stand speed of 90. Miles per hour. What was connies average speed in miles/ hour
Answer:
Average Velocity = 120 mi/h
Explanation:
First we need to calculate the time taken by Connie to complete first half from Phoenix to flagstaff. So, we use:
s₁ = v₁t₁
where,
s₁ = distance from Phoenix to flagstaff = 180 miles
v₁ = speed of travel from Phoenix to flagstaff = 180 mi/h
t₁ = time taken to travel from Phoenix to flagstaff = ?
Therefore,
180 miles = (180 m/h)t₁
t₁ = 1 h
Now, we calculate the time for the return trip
s₂ = v₂t₂
where,
s₂ = distance from flagstaff to Phoenix = 180 miles
v₂ = speed of travel from flagstaff to Phoenix = 90 mi/h
t₂ = time taken to travel from flagstaff to Phoenix = ?
Therefore,
180 miles = (90 m/h)t₂
t₂ = 2 h
Now, we find total time:
t = t₁ + t₂
t = 1 h + 2 h
t = 3 h
and the total distance was:
s = s₁ +s₂
s = 180 mi + 180 mi
s = 360 mi
So, the average velocity will be:
Average Velocity = s/t
Average Velocity = 360 mi/3 h
Average Velocity = 120 mi/h
The engine of a boat (m = 1580 kg) exerts a
2200 N force northward, while the current
pushes it 1350 N eastward.
In what direction does the boat accelerate?
Answer:
58.5
Explanation: no clue on how to do it but i just got that answer on my accelus✨
To solve this problem we must use Newton's second law, which tells us that the sum of forces on a body is equal to the product of mass by acceleration. The direction of the boat is northward and its magnitude is 1.633 m/s².
What is acceleration?An object is said to be accelerated if there is a change in its velocity. The rate of change of velocity with respect to time is known as the velocity. It is a vector quantity and it has both magnitude and direction. It is the first derivative of velocity with respect to time.
Fx = 2200 [N]
Fa = 1350 [N]
F = √(Fₓ)² + (Fₐ)²
F = √(2200)² + (1350)²
F = 2581.18 N
Now using Newton's second law.
F = m×a
a = F / m
a = 2581.18 / 1580
a = 1.633 m/s²
Thus acceleration is 1.633 m/s² and it is northward direction.
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Identifying Mechanical Energy Which image shows both potential and Kinet energy Α Α Α
Answer:
What is Kinetic and Potential Energy? In Physics, energy is used to refer to an ability to do work. Energy exists in various forms. This includes Gravitational energy, Chemical energy, Radiant energy, Mechanical energy, Sonic energy, Thermal energy, Nuclear or atomic energy, Magnetic energy and Electrical energy amongst many others.
Explanation:
Answer:
Um show me a picture or show me the image so I can Give you answer in the comments
Explanation:
For the PE formula, why is the height required for calculations? Why do we need to know the height in order to determine PE? *
Answer:
Answer in Explanation
Explanation:
Whenever we talk about the gravitational potential energy, it means the energy stored in a body due to its position in the gravitational field. Now, we know that in the gravitational field the work is only done when the body moves vertically. If the body moves horizontally on the same surface in the Earth's Gravitational Field, then the work done on the body is considered to be zero. Hence, the work done or the energy stored in the object while in the gravitational field is only possible if it moves vertically. This vertical distance is referred to as height. This is the main reason why we require height in the P.E formula and calculations.
The derivation of this formula is as follows:
Work = Force * Displacement
For gravitational potential energy:
Work = P.E
Force = Weight = mg
Displacement = Vertical Displacement = Height = h
Therefore,
P.E = mgh
19. What ingredient makes Electronic Cigarettes and Traditional Ones addictive?
(5 Points)
Tar
Nicotine
Chemicals
all of the above
Answer:
it is nicotine
Explanation:
your welcome
Answer:
Nicotine
Explanation:
The question and answer options are in the photo!
what are erthpuaks and why do thay hapen
Answer:
earthquakes are violent ruptures that happen in the earth that causes a giant ravine and they happen when the plates of earth separate