Answer:
The northern lights come from the interaction of electrically charged particles given off by the Sun surface during solar storms and the Earth's magnetic field which is pointed in the northern to southern poles of the Earth. Therefore, the charged particles that travel through millions of miles from the Sun to the Earth accelerate towards the magnetic poles and appear as the northern (and southern) lights
Boreal is an adjective word for the north or northern regions. In the southern latitudes, in the southern hemisphere, the phenomenon is called aurora australis (australis is the adjective for 'of the south')
Explanation:
What goals do investigators have when examining a car accident? How do they know how fast a car that was involved in an accident was going?
Answer:
--->The goals of the investigators is to prevent tampering with evidence and reduce exposing workers to additional harm.
--> The investigators are able to find out how fast a car that was involved in an accident was going by measuring the length of skid marks.
Explanation:
Automobile or car accidents are incidents which when it occurs are generally fast, violent and confusing to both the people involved and the eyewitnesses. With the development in technology, investigators (usually known as forensic investigators) use a variety of tools and physical evidence to put together a clear picture of what happened during a car accident. With their discoveries, they would be able to to prevent tampering with evidence and reduce exposing workers to additional harm.
They can know how fast a car that was involved in an accident was going by:
--> Analysing a physical evidence such as measurement of the length of skid marks. When the skid distance (which is the drag factor due to road surface friction) and the braking efficiency are determined, the minimum speed of a car as it started skidding can be estimated. Even the appearance of the skid mark also tells investigators whether a car was braking, accelerating, or sliding.
Explain the method to measure the external diameter of a sphere
Answer:
The sphere is that the circular objects in the two-dimensional space (1) circle
(2) disk. Two-dimensional space is a set of points and the distance of that point, The two points of Sphere that length and center.
The sphere can be constructed as the name of surface form circle about any diameter. The circle is the special type of the revolution replacing the circle,
the sphere is the distance r is the radius of the ball and the circle is the center of the mathematical ball, as the center and the radius of the sphere is to respectively.
The ball and sphere have not to be maintained mathematical references as solid references. A sphere of any radius is centered at the number of zero.
Explanation: Hope this helps and good luck :)
find the acceleration gained by a body in 6 seconds if its initial velocity is 30 meter/seconds and final velocity is 60/seconds meter and spammers stay away
Answer:
Acceleration, a = 5 m/s²
Explanation:
Given the following data;
Initial velocity = 30 m/s
Final velocity = 60 m/s
Time = 6 seconds
To find the acceleration, we would use the first equation of motion;
V = U + at
Where;
V is the final velocity.
U is the initial velocity.
a is the acceleration.
t is the time measured in seconds.
Substituting into the equation, we have;
60 = 30 + a*6
60 - 30 = 6a
30 = 6a
Acceleration, a = 30/6
Acceleration, a = 5 m/s²
write any two features of capital
In a democracy how is rule of law regarded
Answer:
It is respected as leaders are accountable to the people. The rule of law within a democratic country will dictate what actions is considered wrong and punishable to do in that country. This will prevent people from harming and violating each other to get what they want and form a stable and safe society
A car moving round a circular rest of a car take 120/s to do a lap of 8/km what is the speed in kmlh
Answer:
speed = 240 kilometers per hour
Explanation:
so we know speed = distance over time
speed= 120s
distance= 8km
8km/120s=0.0666km/sec
0.0666km covered in 1 sec
3,600 seconds- 1km/hr
0.0666/1 times 3600= 239.76
239.76= 240km/hr
A lens has a radius of curvature of magnitude R R on its left surface and a radius of curvature of magnitude 2R 2 R on its right surface. Parallel rays entering the lens from the left are focused to a point 145 mm m m to the right of the right surface.
Answer:
[tex]v=-29cm[/tex]
Explanation:
From the question we are told that:
Radius [tex]R=2f[/tex]
Distance [tex]v=145mm=>14.5cm[/tex]
Generally the equation for is mathematically given by
[tex]\frac{1}{f}=\frac{1}{u}+\frac{1}{v}[/tex]
Therefore
[tex]\frac{1}{f}=\frac{1}{v}[/tex]
[tex]\frac{1}{f}=\frac{1}{14.5}[/tex]
[tex]f=14.5cm[/tex]
Therefore
[tex]R=2f\\\\R=2*14.5[/tex]
[tex]R=29cm[/tex]
Generally the equation for Focal Length of the Right surface is mathematically given by
[tex]f_r=\frac{R_r}{2}[/tex]
[tex]f_r=\frac{2R}{2}[/tex]
[tex]f_r=29cm[/tex]
Therefore
[tex]\frac{1}{29}-\frac{1}{14.5}=\frac{1}{v}[/tex]
[tex]\frac{1}{v}=-\frac{1}{29}cm[/tex]
[tex]v=-29cm[/tex]
What is the lowest possible temperature?
a 273 K
b absolute zero
со °C
d 100 °C
Answer:
b- absolute zero
*( And it's called zero kelvin)
A 1 kg billiard ball collides head on with a 0.1 kg marble that sits at rest on the table. The marble moves at 3 m/s in the same direction the billiard ball was originally moving. The billiard ball continues after the collision at 0.3 m/s. What was the initial speed of the billiard ball?
Let v be the billiard ball's initial speed. The total momentum of the ball-marble system is conserved between the times before and after their collision, so that
(1 kg) v + (0.1 kg) (0 m/s) = (1 kg) (0.3 m/s) + (0.1 kg) (3 m/s)
Solve for v :
v + 0 = 0.3 m/s + 0.3 m/s
v = 0.6 m/s
For a vehicle to negotiate a banked curve in poor weather conditions, where the force of friction f = 0, for a given velocity v =25 m/s, and the angle at which the curve is banked is 15, find the radius of curvature R.
Answer:
[tex]R=240m[/tex]
Explanation:
From the question we are told that:
Velocity [tex]v=25m/s[/tex]
Force of friction f = 0
Angle [tex]\theta=15[/tex]
Generally the equation for Radius of curvature is mathematically given by
[tex]R=frac{v^2}{tan\theta *g}[/tex]
[tex]R=frac{25^2}{tan 15 *9.81}[/tex]
[tex]R=240m[/tex]
please give me answer
which best esplains how the body maintains homeostasis.
a. All systems work together to stabilize the body .
b. Each systems work indepently to stabilize the body .
c. All systems works together to match the external environment.
d. Each system works indepently to match the external evironment.
a. all systems work together to stabilize the body
An unbalanced 6.0-newton force acts eastward on an object for 3.0 seconds. The impulse
produced by the force is
18 N:s east
2 Nós east
18 N:s west
2 Nis west
Which statement should he place in the region marked X?
Explanation:
The answer is Electrons move between objects.
Which of the following describes a sound wave?
A. Longitudinal wave that does not require a medium
c
B. Longitudinal wave that requires a medium
C. Transverse wave that does not require a medium
D. Transverse wave that requires a medium
In the diagram, q1 = +4.88*10^-8 C.
What is the potential difference when
you go from point A to point B?
Include the correct sign, + or - .
B
0.538 m
1.36 m
91 |
(Hint: Does V go up or down when you go
from B to A?) (Unit = V)
Answer:
ΔV = 1139.3 V = 1.139 KV (+ve sign shows V goes up)
Explanation:
The potential difference while moving from point A to Point B is given as follows:
[tex]\Delta V = V_B-V_A[/tex]
where,
ΔV = potential difference from A to B = ?
[tex]V_A[/tex] = Potential at point A = [tex]\frac{kq}{r_A}[/tex]
[tex]V_B[/tex] = Potential at point B = [tex]\frac{kq}{r_B}[/tex]
Therefore,
[tex]\Delta V = \frac{kq}{r_B}-\frac{kq}{r_A}\\\\\Delta V = kq(\frac{1}{r_B}-\frac{1}{r_A})[/tex]
where,
k = Colomb's Constant = 9 x 10⁹ N.m²/C²
q = magnitude of charge = 4.88 x 10⁻⁸ C
[tex]r_A[/tex] = distance of point A from charge = 1.36 m
[tex]r_B[/tex] = distance of point B from charge = 0.538 m
Therefore,
[tex]\Delta V = (9\ x\ 10^9\ N.m^2/C^2)(4.88\ x\ 10^{-8}\ C)(\frac{1}{0.538\ m}-\frac{1}{1.36\ m})\\\\\Delta V = (439.2 N.m^2/C)(2.59\ /m)[/tex]
ΔV = 1139.3 V = 1.139 KV (+ve sign shows V goes up)
The answer is 492.87.
Correct on Acellus
what is electricity???????
Explanation:
Electricity is defined as the rate of flow of charges in a conductor.hope it helps.stay safe healthy and happy...Answer:
Electricity is the presence and flow of electric charge. Using electricity we can transfer energy in ways that allow us to do simple chores . it's best - known form is the flow of electrons through conductor such as copper wires. The world "electricity " is sometimes used to mean "electrical energy "
Explanation:
hope it is helpful to you ☆
[tex]kavya[/tex]
Un ladrillo de 2kg que se encuentra a 200º c, se sumerge en 5 kg de agua a 32º¿a que temperatura se alcanza el equilibrio térmico?
Answer:
El equilibrio térmico se alcanzará a los 152ºC.
Explanation:
Dado que un ladrillo de 2kg que se encuentra a 200º c, se sumerge en 5 kg de agua a 32º, para determinar a qué temperatura se alcanza el equilibrio térmico se debe realizar el siguiente cálculo:
2+5 = 7
(200 x 5 + 32 x 2) / 7 = X
1064 / 7 = X
152 = X
Por lo tanto, el equilibrio térmico se alcanzará a los 152ºC.
Which of the following measures does not help promote technological progress?
issuing a patent to a company that invents a new product
increased wages for researchers
training programs for workers
reducing the scale of the market for a new product
Answer:
reducing the scale of the market for a new product
Explanation:
A product can be defined as any physical object or material that typically satisfy and meets the demands, needs or wants of customers. Some examples of a product are mobile phones, television, microphone, microwave oven, bread, pencil, freezer, beverages, soft drinks, automobiles, motorcycles, etc.
The use of technology in the manufacturing of a new product can be effectively and efficiently promoted in the market by doing the following;
I. Issuing a patent to a company that invents a new product. Patent can be defined as the exclusive or sole right granted to an inventor by a sovereign authority such as a government, which enables him or her to manufacture, use, or sell an invention for a specific period of time.
Generally, patents are used on innovation for products that are manufactured through the application of various technologies.
II. Paying a higher amount of money as wages for researchers who are saddled with the responsibility of making finding about a product.
III. Creating a training programs that would help to improve on the knowledge and skills of workers.
However, reducing the scale of the market for a new product in comparison with other products and standards does not help promote technological progress.
The moon is 250,000 miles away. How many feet is it from Earth? (dimensional analysis)
Answer:
1.261 billion
Explanation:The distance between the earth and the moon in miles is 250,000,so in feet,The distance is 1.261 billion
Chỉ ra kết luận đúng trong các kết luận sau:
A.
Chỉ có các hạt mang điện tích dương chuyển động có hướng mới tạo ra dòng điện.
B.
Chỉ có các hạt mang điện tích âm chuyển động có hướng mới tạo ra dòng điện.
C.
Khi nguyên tử chuyển động có hướng thì xuất hiện dòng điện.
D.
Các dụng cụ điện sẽ hoạt động khi có dòng điện chạy qua.
what is measurment ?
Answer:
Measurement is the act or the process of finding the size, quantity or degree of something.
Explanation:
We can measure the length, weight, and capacity (volume) of any given object.
What efforts are made to bring uniformity in measurement
Answer: The use of S I Unit brings uniformity in measurements.
Explanation:
The S I unit is the international system of units which are used to express the magnitudes or quantities of important natural phenomena. It is used universally as a standard for measurements thereby creating an avenue for uniformity in measurements. The base units that makes up the SI unit are:
--> Length: this is measured in meters (m)
--> Time: this is measured in seconds (s)
--> Mass: this is measured in kilogram (kg)
--> Temperature: this is measured in Kelvin (k)
--> Electric current: this is measured in ampere (A).
--> Amount of substance: this is measured in mole
--> Luminous intensity: this is measured in candela (cd)
These units are used as the standard to make our judgement of measurement more reliable and accurate. And since there is only one basic unit for each quantity (example length which is measured in meters) there is no need for further conversions.
57. A red ball (m= 10 kg) is moving at 3 m/s. A green ball (m = 8 kg) is moving at 3.5 m/s. Which ball has more
energy and by how much (2)
Answer:
the green ball has 4J more energy
Explanation:
The kinetic energy is given by the formula
K = 0.5 m v^2
the kinetic energy of the red ball:
K(red) = 0.5*10*3^2= 45J
of the green ball:
K(green)=0.5*8*3.5^2 = 49J
therefore the green ball has more energy by 4 Joules
tìm chỉ số của A1 và A2
Answer:
A1
Explanation:
Performance Task 2: "TAKE HOME TASK
1. It took scientist a long time to reconcile the dual nature of light, which led to the idea of the duality of matter. To further see an
evidence of this concept try to observe the smoke coming from a barbeque drill. From a distance, you will see a
wave flow of smoke going up.
Guide Questions:
a. Look closely into it, what do you see?
ha Does your observation tell something about the dual nature of matter? Why? Why not?
2. Observe the colors on the soap bubbles on the surface of water.
Guide Questions:
a. What do you see?
b. What property of light is exhibited?
Pasagot po huhu
2. A student is pulling a 11.0 kg sled along flat ground. The students 30.0 kg sister then sits in the sled. The student then applies a 430 N force at an angle of 35° N of E. If the force of friction is 180 N, what is the acceleration of the sister sitting in the sled. (Ensure you draw a free body diagram.)
Answer:
Explanation:
The equation for this is
F - f = ma
The thing that gets strange here is that, because the student is pulling his sister on the sled with the rope at an angle, some of his efforts are being wasted. The sled is only going to move forward (horizontally), so the vertical component of that force is useless. He's not actually pulling horizontally with that much force; we have to figure out how much using the following equation:
[tex]F=430cos35[/tex] to get that
F = 352 N
Everything else falls into place quite easily into the equation now:
352 - 180 = 41a and
172 = 41a so
a = 4.2 m/s/s
What are the products of a fusion reaction?
A. Energy and a larger nucleus
B. A smaller nucleus and a positron
C. Energy and two or more smaller nuclei
D. A larger nucleus and an electron
Answer:
I think A
if I'm wrong I'm sorry did my best on research
Answer:
A
IN fusion reaction two small nuclei join together to form a heavy nucleus with the emission of neutron and energy
Why is the cathode ray oscilloscope evacuated?
Answer:
please like
Explanation:
hope it helps you
Water exits straight down from a faucet with a 1.96-cm diameter at a speed of 0.55 m/s. The volume flow rate of the water as it exits from the faucet is Blank
1. Calculate the answer by read surrounding text. cm3/s. As the water falls from the faucet with the given speed, it accelerates due to gravity and reaches a speed of _______
2. Calculate the answer by read surrounding text. after it has moved 0.2 m downward. With this change in speed of the water, the diameter of the stream 0.2 m below the faucet is _______
3. Calculate the answer by read surrounding text. _________ cm.
Answer:
Q = 165.95 cm³ / s, 1) v = [tex]\sqrt{0.55^2 + 19.6 y}[/tex], 2) v = 2.05 m / s,
3) d₂ = 1.014 cm
Explanation:
This is a fluid mechanics exercise
1) the continuity equation is
Q = v A
where Q is the flow rate, A is area and v is the velocity
the area of a circle is
A = π r²
radius and diameter are related
r = d / 2
substituting
A = π d²/4
Q = π/4 v d²
let's reduce the magnitudes
v = 0.55 m / s = 55 cm / s
let's calculate
Q = π/4 55 1.96²
Q = 165.95 cm³ / s
If we focus on a water particle and apply the zimematics equations
v² = v₀² + 2 g y
where the initial velocity is v₀ = 0.55 m / s
v = [tex]\sqrt{0.55^2 + 2 \ 9.8\ y}[/tex]
v = [tex]\sqrt{0.55^2 + 19.6 y}[/tex]
2) ask to calculate the velocity for y = 0.2 m
v = [tex]\sqrt{0.55^2 + 19.6 \ 0.2}[/tex]
v = 2.05 m / s
3) We write the continuous equation for this point 2
Q = v₂ A₂
A₂ = Q / v₂
let us reduce to the same units of the SI system
Q = 165.95 cm³ s (1 m / 10² cm) ³ = 165.95 10⁻⁶ m³ / s
A₂ = 165.95 10⁻⁶ / 2.05
A₂ = 80,759 10⁻⁶ m²
area is
A₂ = π/4 d₂²
d₂ = [tex]\sqrt{4 A_2 / \pi }[/tex]
d₂ = [tex]\sqrt{ \frac{4 \ 80.759 \ 10^{-6} }{\pi } }[/tex]
d₂ = 10.14 10⁻³ m
d₂ = 1.014 cm
