Answer:
yes the nucleus of an
atom of an element
equal to its atomic
number
Describe the method of obtaining pure drinking water from the sea water with a labelled diagram.
( plzzzz answer correctly )
Answer:
Desalination is a process that takes away mineral components from saline water.
Explanation:
u welcome
Pls someone help me!!!!!
Answer:
Seeing as how the balloon is mainly negatively charged and the paper being positively charged, the answer would be B: The tissue paper will stick to the balloon because the tissue paper is positively charged!
Pls help me find the electrons of these 4 questions asap.
What is a parallel universe, and could there potentially be ones that contain doppelgängers of everyone on Earth?
Answer:
what i commented.
Explanation:
How would the force of gravity between two objects change if the mass of
each object were doubled?
A. The force between them would be 2 times larger than with the
initial masses.
B. The force between them would be 1/4 the force with the initial
separation.
C. The force between them would be 4 times larger than with the
initial masses.
D. The force between them would be 1/2 the force with the initial
separation
Answer:
Option C. The force between them would be 4 times larger than with the
initial masses.
Explanation:
To know which option is correct, we shall determine the force of attraction between the two masses when their masses are doubled. This can be obtained as follow:
From:
F = GMₐM₆/ r²
Keeping G/r² constant, we have
F₁ = MₐM₆
Let the initial mass of both objects to be m
F₁ = MₐM₆
F₁ = m × m
F₁ = m²
Next, let the masses of both objects doubles i.e 2m
F₂ = MₐM₆
F₂ = 2m × 2m
F₂ = 4m²
Compare the initial and final force
Initial force (F₁) = m²
Final (F₂) = 4m²
F₂ / F₁ = 4m² / m²
F₂ / F₁ = 4
F₂ = 4F₁ = 4m²
From the above illustrations, we can see that when the mass of both objects doubles, the force between them would be 4 times larger than with the
initial masses.
Thus, option C gives the correct answer to the question.
how can we realize that light travel in straight line ?
Answer:
It can be seen from the operation of pin-hole camera, formation of shadows and eclipse.
Explanation:
The phenomenon of light traveling in a straight line is known as rectilinear propagation of light.
One this evidence can be seen from the operation of pin-hole camera, which depends on rectilinear propagation of light
Also two natural effects that result from the rectilinear propagation of light are the formation of Shadows and Eclipse.
Compare and contrast O2 and F2.
Answer:
1) Similarity:
1. diatomic molecules.
2. nonpolar covalent bond.
3. gaseus state at room temperature.
4. very reactive, with high electronegativity.
When light illuminates a diffraction grating with 5424 lines per centimeter, its second order maximum is at 50°. What is the wavelength of the light in nanometers (nm)?
Answer:
people do not click that guys link its to get your ip check his profile all his answers are like that DONT CLICK IT
Explanation:
Which of the following are vector quantities? Check all that apply.
A. Distance
B. Acceleration
C. Time
D. Velocity
The frequency will be 6 × 1014 H z of a typical green photon of 500nm emitted by the Sun. a. TRUE
b. FALSE
A rock is thrown straight up with an initial speed of 15.5 m/s . It is caught at the same distance above the ground . How high does the ball rise? How long does the ball remain in the air?
Answer:
The height risen by the rock is 12.26 mThe time spent in air by the rock is 3.16 sExplanation:
Given;
initial velocity of the rock, u = 15.5 m/s
at maximum height the final velocity of the rock, v = 0
The height risen by the rock is calculated as follows;
v² = u² - 2gh
0 = u² - 2gh
2gh = u²
h = u² / 2g
h = (15.5²) / (2 x 9.8)
h = 12.26 m
The time spent in air by the rock is known as time of flight, which is calculated as follows;
v = u - gt
0 = u - gt
gt = u
t = u/g
where;
t is the time to reach maximum height
t = 15.5 / 9.8
t = 1.58 s
Time of flight (time spent in air) is calculated as;
T = 2t
T = 2 x 1.58 s
T = 3.16 s.
For a converging lens, a ray arriving parallel to the optic axis
a. appears to come from the principal focal point.
b. passes through the principal focal point.
c. passes through the "other" focal point.
d. appears to come from the "other" focal point.
Answer:
b. passes through the principal focal point.
Explanation:
Light wave can be defined as an electromagnetic wave that do not require a medium of propagation for it to travel through a vacuum of space where no particles exist.
A lens can be defined as a transparent optical instrument that refracts rays of light to produce a real image.
Basically, there are two (2) main types of lens and these includes;
I. Diverging (concave) lens.
II. Converging (convex) lens.
A converging lens refers to a type of lens that typically causes parallel rays of light with respect to its principal axis to come to a focus (converge) and form a real image. This type of lens is usually thin at the lower and upper edges and thick across the middle.
For a converging lens, a ray arriving parallel to the optic axis passes through the principal focal point.
The correct option is b. passes through the principal focal point.
The following information should be considered:
Light wave refers to an electromagnetic wave that does not require a medium of propagation for it to travel via a vacuum of space where no particles exist. A lens refers to a transparent optical instrument that refracts rays of light to produce a real image.
Basically, there are two (2) main types of lens:
Diverging (concave) lens: Converging (convex) lensA converging lens refers to a type of lens that typically causes parallel rays of light with respect to its principal axis to come to a focus (converge) and form a real image.
Learn more: brainly.com/question/17429689
What has gravity led scientists to understand?
Answer:
Gravity is a non-contact force that was observed famously by Sir Isaac Newton, who watched an apple falling from a tree to the ground. ... Newton was the first to realise that gravity existed in space and it was the force which holds the Moon in orbit around the Earth and planets in orbit around the Sun.
Answer:
Newton's theory had prove that all objects, as small as an apple and as large as a planet, are subjected to gravity. Gravity helped to keep the planets rotating around the sun and creates the ebbs and flows of rivers and tides.An automobile is traveling away from Jill and towards Jack. The horn is honking, producing a sound wave.
a. Towards which person do the sound waves travel the fastest?
b. Who will hear the highest frequency? Why?
Answer:
a. The sound will travel at the speed to both Jill and Jack
b. Jack
Explanation:
a. Doppler effect describes how the frequency of a sound wave changes with regards to an observer that has relative motion to the sound source;
The Doppler effect is given by the following formula;
For a sound that is moving away, as observed by Jill, we have;
[tex]f' = \dfrac{(v - v_0)}{(v + v_s)} \cdot f = \dfrac{v }{(v + v_s)} \cdot f[/tex]
For approaching sound, as observed by Jack, we have;
[tex]f' = \dfrac{(v + v_0)}{(v - v_s)} \cdot f = \dfrac{v }{(v - v_s)} \cdot f[/tex]
Where;
f = The sound wave's actual frequency
f' = The frequency of the moving sound to the observer
v = The speed of the sound wave
v₀ = The observer's velocity = 0
[tex]v_s[/tex] = The velocity of the source (the automobile honking) of the sound wave
From the above equation, we have that the speed of sound, 'v', is the same to both the source, and the observer although the frequency, and therefore, the wavelength of the sound alternatively increases or decreases
b. From the Doppler effect equation, the person who will hear the highest frequency is given by the formula for the frequency when the sound is approaching the observer, which has the lower denominator
Therefore, given that the automobile is travelling towards Jack, jack will hear the higher frequency
What is the gravitational energy of a 2.63kg
book when it is lifted 14.29m off the floor?
Give your answer rounded to one place after the
decimal, no units.
Question 3
Answer:
G.P.E = 368.3
Explanation:
Given the following data;
Mass = 2.63kg
Height, h = 14.29m
We know that acceleration due to gravity is equal to 9.8m/s²
To find the gravitational potential energy;
Gravitational potential energy (GPE) is an energy possessed by an object or body due to its position above the earth.
Mathematically, gravitational potential energy is given by the formula;
[tex] G.P.E = mgh[/tex]
Where;
G.P.E represents potential energy measured in Joules.
m represents the mass of an object.
g represents acceleration due to gravity measured in meters per seconds square.
h represents the height measured in meters.
[tex] G.P.E = 2.63*9.8*14.29 [/tex]
G.P.E = 368.3
Note: the unit of gravitational potential energy is Joules.
3) 3 A force of -4.4x10^33 N exists between a positive charge of 8.0x10^-4 C and a
negative charge -3.0x10^-4 C. What is the distance that separates the charges?
Answer:
[tex]r=7\times 10^{-16}\ m[/tex]
Explanation:
The force between charges, [tex]F=-4.4\times 10^{33}\ N[/tex]
Positive charge, [tex]q_1=8\times 10^{-4}\ C[/tex]
Negative charge, [tex]q_2=-3\times 10^{-4}\ C[/tex]
We need to find the distance between charges. The force of attraction between charges is given by :
[tex]F=\dfrac{kq_1q_2}{r^2}[/tex]
Where
r is the distance between charges
[tex]r=\sqrt{\dfrac{kq_1q_2}{F}} \\\\r=\sqrt{\dfrac{9\times 10^9\times 8\times 10^{-4}\times 3\times 10^{-4}}{4.4\times 10^{33}}} \\\\r=7\times 10^{-16}\ m[/tex]
So, the distance between charges is [tex]7\times 10^{-16}\ m[/tex].
1.
X, Y and Z are the weights of three objects
suspended by pulleys as shown.
Assuming the pulleys in this system are frictionless
and weightless and that Z= 12 N, what are the
values of X and Y?
24°
50°
Х
Y
Z
Answer:
The weight of the object X is approximately 3.262 N (Acting downwards)
The weight of the object Y is approximately 8.733 N (Acting downwards)
Explanation:
The question can be answered based on the principle of equilibrium of forces
The given parameters are;
The weight of Z = 12 N (Acting downwards)
The weight of the pulleys = Negligible
From the diagram;
The tension in the in the string attached to object Z = The weight of object Z = 12 N
The tension in the in the string attached to object X = The weight of the object X
The tension in the in the string attached to object Y = The weight of the object Y
Given that the forces are in equilibrium, we have;
The sum of vertical forces acting at a point, [tex]\Sigma F_y[/tex] = 0
Therefore;
[tex]T_{1y} + T_{2y} + T_{3y} = 0[/tex]
[tex]T_{1y} = -( T_{2y} + T_{3y} )[/tex]
Where;
[tex]T_{1y}[/tex] = The weight of object Z = 12 N
[tex]T_{1y}[/tex] = 12 N
[tex]T_{2y}[/tex] = The vertical component of tension, T₂ = T₂ × sin(24°)
∴ [tex]T_{2y}[/tex] = T₂ × sin(156°)
Similarly;
[tex]T_{3y}[/tex] = T₃ × sin(50°)
From [tex]T_{1y} = -( T_{2y} + T_{3y} )[/tex], and [tex]T_{1y}[/tex] = 12 N, we have;
12 N = -(T₂ × sin(156°) + T₃ × sin(50°))...(1)
Given that the forces are in equilibrium, we also have that the sum of vertical forces acting at a point, ∑Fₓ = 0
Therefore at point B, we have;
T₁ₓ + T₂ₓ + T₃ₓ = 0
The tension force, T₁, only has a vertical component, therefore;
∴ T₁ₓ = 0
∴ T₂ₓ + T₃ₓ = 0
T₂ₓ = -T₃ₓ
T₂ₓ = T₂ × cos(156°)
T₃ₓ = T₃ × cos(50°)
From T₂ₓ = -T₃ₓ, we have;
T₂ × cos(156°) = - T₃ × cos(50°)...(2)
Making T₃ the subject of equation (1) and (2) gives;
Making T₃ the subject of equation in equation (1), we get;
12 = -(T₂ × sin(156°) + T₃ × sin(50°))
∴ T₃ = (-12 - T₂ × sin(156°))/(sin(50°))
Making T₃ the subject of equation in equation (2), we get;
T₂ × cos(156°) = - T₃ × cos(50°)
∴ T₃ = T₂ × cos(156°)/(-cos(50°))
Equating both values of T₃ gives;
(-12 - T₂ × sin(156°))/(sin(50°)) = T₂ × cos(156°)/(-cos(50°))
-12/(sin(50°)) = T₂ × cos(156°)/(-cos(50°)) + T₂ × sin(156°)/(sin(50°))
∴ T₂ = -12/(sin(50°))/((cos(156°)/(-cos(50°)) + sin(156°)/(sin(50°))) ≈ -8.02429905283
∴ T₂ ≈ -8.02 N
From T₃ = T₂ × cos(156°)/(-cos(50°)), we have;
T₃ = -8.02× cos(156°)/(-cos(50°)) = -11.3982199717
∴ T₃ ≈ -11.4 N
The weight of the object X = -T₂ × sin(156°)
∴ The weight of the object X ≈ -(-8.02 × sin(156°)) = 3.262 N
The weight of the object X ≈ 3.262 N (Acting downwards)
The weight of the object Y = -(T₃ × sin(50°))
∴ The weight of the object Y = -(-11.4 × sin(50°)) ≈ 8.733 N
The weight of the object Y ≈ 8.733 N (Acting downwards)
How much electrical energy is consumed by a motor of 1 horse power in 1 second?
Answer:
22.38 kW
Explanation:
A 1 HP motor is supposed to deliver power equivalent to 746 Watts, or in other words, the rotational mechanical energy delivered by the shaft of the motor is rated to be equal to 746 Watts or .746 kW. This .746 kW is the net result delivered by the shaft of the motor “after” overcoming losses from the total power consumed by the motor from its input source, wherein there are losses attributed to mechanical friction, electrical losses within the motor, sound, heat, etc. This difference between the electrical power consumed by the motor from the “input” source and the mechanical energy delivered from the “output” source (shaft) is defined as performance efficiency, which is mostly around 80% in most motors.
Now, presuming that your motor performs at 80% efficiency, the total power it consumes will be .746 kW/80 X 100 = 0.9326 kW/hour.
Therefore, if you keep the motor running for 24 hours, the total power consumption will be 0.9326 kW X 24 Hours = 22.38 kW
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6. Explain how you could increase the potential energy of an object. *
Answer:
a doubling of the height will result in a doubling of the gravitational potential energy.
Explanation:
in a system, what is the definition of a process?
Answer:
Processes are all the related activities (parts) inside the system that work together to make it function. ... It's important that processes are effective at what they do so that the system can run efficiently. Processes are the sequence of activities intended to produce a particular result.
Explanation:
Answer:A process is an instance of a program running in a computer. It is close in meaning to task, a term used in some operating system
A car has a mass of 1500 kg. It is traveling at a speed of 0.52 m/s. What is the kinetic energy of the car?
a.202.8 J
b.202.8
c.390 J
d.390
Answer:
c
Explanation:
Answer plzz
How do we apply Interval Training to our lower body for a workout?
True or false? Humans use more water for washing at home than for any other use.
8. A partial food web is shown. The mourning dove is a bird that is often part of this food web. Which of these describes the mourning dove when it is part of the food web shown? A Parasite-host relationship with the robin because it uses the robin's nest. B Predator-prey relationship with tent caterpillars because they both use the same resources from the sugar-maple tree. C Producer-consumer relationship with sugar-maple trees because it gets food from the trees. D Producer-consumer relationship with its young because it feeds its young regurgitated food
Answer:
It has producer-consumer relationship with sugar-maple trees because it gets food from the trees.
Explanation:
The mourning bird is primarily a seed eater and not an insect eater. Since it is a seed eater, it will directly from the sugar-maple tree which is the producer.
In an ecosystem, the producers are plants which can trap energy directly from the sun during photosynthesis. This energy is passed on to the consumers.
Hence, the mourning bird has producer-consumer relationship with sugar-maple trees because it gets food from the trees.
If the charge 16 C flows through the lightening during time 0.002 s then the AVERAGE current is equal to
80 A
8000 A
80000 A
0 A
Other:
Answer:
the average current is 8000 A
Explanation:
I got it answered by an expert
A physical property is
O onethat describes using our 5 sences
O stops when a chemical reaction is occurring
one that makes something new
O one that describes a chemical change.
Answer:
One that we describe using our 5 senses
Explanation:
A physical property describes something we can physically observe.
Is 35 miles per hour a vector or a scalar?
1. vector
2. scalar
Answer:
scalar
is the correct answers
Answer:
Scalar
Explanation:
Mph, cubic feet,pounds, and hours are scalar terms
Which statements about acceleration are true?
Check all that apply.
A. Acceleration is found by dividing the change in speed by the
change in time.
B. Acceleration is a vector quantity.
C. The symbol used for acceleration is a
D. The SI units for acceleration are m/s^2
Answer:
B
C
D
My answers... I hope this helps
Describing Energy Transformations
This activity will help you meet this educational goal:
You will write an explanation of a process using precise language and vocabulary.
Directions
Read the instructions for this self-checked activity. Type in your response to each question, and check your answers. At the
end of the activity, write a brief evaluation of your work.
Activity
In this activity, you will analyze some events and describe the energy transformations that take place.
Part A
A battery powers a circuit for a small noisy fan. The fan's motor gets warm as it turns. What energy transformations are
taking place?
Answer:
chemical energy to electrical energy to sound energy to heat energy
Answer:
chemical energy to electrical energy to sound energy to heat energy
Explanation:
Susie rolls a bowling ball down the alley and knocks over most of the pins. Explain why fewer pins were knocked over when her little brother rolled a basketball, at the same velocity, down the alley.
Answer:
The force used
Explanation:
This has to be because of the force used. Both Susie and her younger brother might have hit the ball with the same velocity, but they surely couldn't have hit it with the same force. The force with which Susie hurts it is heavier than that with which her younger brother hits it, and as such, Susie gets to fall down more pins than her brother will be able to. The ball has to have a lot of force in it for it to be able to knock off all the pins there. So basically, the more the force, the higher it's chances of hitting all the pins