Answer:
b
Explanation:
The radiation is reflected by the ice and then absorbed by the atmosphere.
Answer:
B
Explanation:
I got it right on my assignment
Beryllium has a charge of +2, and bromine has a charge of –1. Which is the best name for the ionic bond that forms between them? beryllium bromide beryllium bromine bromine berylliumide bromide berylliumide
Answer:
Beryllium bromide
Explanation:
There exists 2 elements in the question
Beryllium Be with valence of +2, and it's a metal
Bromine Br with a valence of -1, and is a non - metal.
Both of them combine together forming an ionic bond:
Be + Br(2) -> BeBr(2)
In naming the compound, we would say that since the first is a metal, beryllium, and the second being a halogen, bromine. We name it by calling the first name together with the last name and changing the last name of the non metal from -ine to -ide.
So we have, Beryllium Bromide.
Answer: A. Beryllium Bromide
Explanation:
Got it right on edge 2023
An arrow is fired at 5.20 m s−1 at an angle of 22.0° above the horizontal. Find the horizontal component of the initial velocity, expressing your answer in m s−1 to 2d.P.\
Answer:
[tex]4.82ms^{-1}[/tex]
Explanation:
We are given that
Initial velocity, u=5.20m/s
[tex]\theta=22^{\circ}[/tex]
We have to find the horizontal component of the initial velocity.
We know that
Horizontal component of velocity=[tex]ucos\theta[/tex]
Using the formula
Horizontal component of the initial velocity=[tex]5.2cos22^{\circ}[/tex]
Horizontal component of the initial velocity=[tex]5.2\times 0.9272[/tex]
Horizontal component of the initial velocity=[tex]4.82ms^{-1}[/tex]
Hence, the horizontal component of the initial velocity=[tex]4.82ms^{-1}[/tex]
Please help me on these 2 questions!! I'm counting on you guys
Answer:
b and you mom is cute so it's nice I'm here for points
2) Which tricks do you use to reduce pressure in everyday activities?
Answer:
Explanation:
Increase activity and exercise more. ...
Lose weight if you're overweight. ...
Cut back on sugar and refined carbohydrates. ...
Eat more potassium and less sodium. ...
Eat less processed food.
Which of the following quantities is a vector?
A. 400 gallons per minute
B. 312 days
C. 1056 grams
D. 3 feet per second north
Answer:
D
Explanation:
vectors have direction!
What is the distance from one peak to the next peak called?
(multiple choice)
a. crest
b. wavelength
c. amplitude
d. resting point
(choose 1 or more)
Answer:
b. wavelength
Explanation:
Electromagnetic waves is a propagating medium used in all communications device to transmit data (messages) from the device of the sender to the device of the receiver.
Generally, the most commonly used electromagnetic wave technology in telecommunications is radio waves.
Radio waves can be defined as an electromagnetic wave that has its frequency ranging from 30 GHz to 300 GHz and its wavelength between 1mm and 3000m. Therefore, radio waves are a series of repetitive valleys and peaks that are typically characterized of having the longest wavelength in the electromagnetic spectrum.
Basically, as a result of radio waves having long wavelengths, they are mainly used in long-distance communications such as the carriage and transmission of data.
The distance from one peak to the next peak is called wavelength. This distance is also equal to the distance from one trough of a wave to another.
Mathematically, wavelength is calculated using this formula;
[tex] Wavelength = \frac {speed}{frequency} [/tex]
PLEASE HELP WITH THE 6 FOLLOWING SCIENCE QUESTIONS (the topic is circuit symbols and equations):
1. How much charge flows through a speaker if it is on for 20 minutes and has a current of 10A?
2. 500 coulombs of charge flow through a bulb for 25 seconds. Calculate the current trough the bulb.
3. 12A of current and 984C of charge flow through a kettle. How long was the kettle switched on for?
4. A laptop is switched on for 5 hours. It has a current flowing through it of 12A. What is the total amount of charge that flowed through the laptop?
5. An ipad is left in standby mode for 3 hours. During this time, 2.16C of charge flowed through the ipad. How much current flowed through the ipad?
6. A small LED light as 200mA of current flowing through it and a charge flow of 150C. How many minutes and seconds was the light switched on for?
genuine answers please, don't waste answer slots if you don't actually have an answer, it's rather irritating x
1) I=Q/T then Q= I ×T 10* ( 20*60) = 10 (120) therefore the answer is 1200C
2) I= Q/T that is 500/ 25 and the answer is 20A
Which way do the players on the court rotate during a game? What happens if the players serve out of order?
Answer:
Explanation:
on volleyballit's clockwise and What Would Happen If Someone Served Out Of Order? If the wrong player on your team serves because it's not their turn, the point and the possession of the serve will go to your opponents.
3. Waves in a lake are 6.0 m apart and pass a person on a raft every 2.0 s.
What is the speed of the waves?
The speed of wave is 3m/s
What is a Wave Equation ?It is a linear second order partial differential equation which describe the propagation of oscillation at a fixed speed in some quantity .
Since , f = 1/t
f = 1/2 = 0.5 Hz
from wave equation
v(speed) = frequency * wavelength
v(speed ) = 0.5 * 6
v(Speed) = 3 m/s
Hence , The speed of wave is 3m/s
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What is Newton's 2nd law dealing with acceleration
Answer:
Newton's second law of motion pertains to the behavior of objects for which all existing forces are not balanced. The second law states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object. The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object.
Explanation:
30. A force is exerted on a box and an equal and opposite force is exerted by
the box. What explains this?
a conservation of energy
b Newton's first law of motion
c Newton's second law of motion
d Newton's third law of motion
Newtons third law of motion
Explanation:
According to Newtons third law of motion: Every action has an equal and opposite reaction.
Why might a PC monitor be covered with dust?
After gaining electrons from the cloth, can the polythene rod attract small pieces of paper?
Answer:
The attractive forces between the dust particles and Television Screen is due to static electricity. The free dust particles have some residual charge due to force of friction from air or colliding dust particles while the television screen has an opposite charge. They attract and dust settles on it.If a polythene rod is rubbed with cloth, the rod can lift small pieces of paper. This can be explained by stating that the rod becomes charged. A charged object will attract a neutral object until it touches and then it is repelled.Explanation:
The Gulf Stream is an ocean current that runs from the southern tip of Florida up the eastern coast of the U.S. And ends in the North Atlantic. How would this Northern flowing stream affect the coast of Europe?
Answer:
The Northern flowing stream will affect the coast of Europe by making climate of Western Europe and Northern Europe to be warmer than other areas that are located around the same latitude and this is simply because of the North Atlantic Current
Explanation:
The Northern flowing stream will affect the coast of Europe because the North Atlantic current causes the Gulf stream to be split into two ( 2 ) and the Northern stream which is a warm stream crossing over to Northern Europe. The Gulf stream makes climate of Western Europe and Northern Europe to be warmer than other areas that are located around the same latitude and this is simply because of the North Atlantic Current
The driver of a 1.5 x 10^3 kg car is traveling cast at 10 ms and increases its speed to 30 m/s east over 15 seconds. What is the initial and final momentum of the body? What is the net force acting on it?
Answer:
See explanations below
Explanation:
Force = m(v-u)/t
mass m = 1.5*10^3kg = 1500kg
v = 30m/s
u = 10m/s
Time t = 15secs
F = 1500(30-10)/15
F = 1500(20)/15
F = 100 * 20
F = 2000N
Force acting on it is 2000N
momentum = mass * velocity
final momentum = 1500 * 30
final momentum = 45000kgm/s
initial momentum = 1500 * 10
initial momentum = 15000kgm/s
The initial momentum, Final momentum and net force acting on the body are 15000 kgm/s, 45000 kgm/s, and 2000 N respectively.
To solve for initial momentum, Final momentum, and average force, we use the formulas below.
⇒ Formulas
M = mu................. Equation 1M' = mv................... Equation 2F = M'-M/t................ Equation 3⇒ Where:
M = Initial momentum of the carM' = Final momentum of the caru = Initial velocity'v = Final velocityt = timeF = net force acting on the car.From the question,
⇒ For The Initial momentum
m = 1.5×10³ kgu = 10 m/s east⇒ Substitute these values into equation 1
M = 1.5×10³×10M = 15000 kgm/sAlso for Final momentum,
⇒ Given:
v = 30 m/s⇒ Substitute into equation 2
M' = 1.5×10³×30M' = 45000 kgm/sAnd finally for net force,
⇒ Given:
t = 15 seconds⇒ substitute into equation 3
F = (45000-15000)/15F = 30000/15F = 2000 NHence,The initial momentum, Final momentum and net force acting on the body are 15000 kgm/s, 45000 kgm/s and 2000 N respectively.
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Magnesium has a charge of +2, and chlorine has a charge of –1. To form a chemical bond, how many magnesium ion(s) would the compound have? 0 1 2 3
Answer:
1
Explanation:
Just one. Because from the way compounds are named and or written. The elements exchange their number of valence electron to complement each other. So, a magnesium of +2 and a Chlorine of -1 when exchanged would give the formula of
MgCl(2)
And as we can tell from the formula of the compound I just write down, Magnesium has just a single ion in it, while Chlorine has 2.
So the answer is 1.
Answer:
the answer is 1
Explanation:
i took the test on edge 2023 and got it right
Which will ensure laboratory safety during the experiment? Check all that apply. using beaker tongs to handle the hot beaker reading the thermometer accurately checking the beaker for chips prior to heating on the hot plate using a beaker instead of an Erlenmeyer flask turning off the hot plate after use
Answer: • using beaker tongs to handle the hot beaker.
• checking the beaker for chips prior to heating on the hot plate.
• Turning off the hot plate after use
Explanation:
The options that will ensure laboratory safety during the experiment will be:
• using beaker tongs to handle the hot beaker.
• checking the beaker for chips prior to heating on the hot plate.
• Turning off the hot plate after use.
We should note that the beaker tongs are simply used in the holding of the beakers that have hot liquids in them. Also, it s vital for the hot plate to be turned off after its use so as to prevent accident.
Using beaker tongs to handle the hot beaker reading the thermometer accurately checking the beaker for chips prior to heating on the hot plate ensure laboratory safety throughout the experiment:
What is an experiment?An experiment is a technique used to prove or disprove a theory, or to test the efficiency or probability of something that has never been done before.
Experiments reveal cause-and-effect relationships by illustrating what happens when a specific component is changed.
The following options will ensure laboratory safety throughout the experiment:
1.Handling the heated beaker using beaker tongs.
2.Inspecting the beaker for chips before heating it on the hot plate.
3.After using the hot plate, turn it off.
Hence all the given options are correct.
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An airplane is flying in a horizontal circle at a speed of 100 m/s. The 80.0 kg pilot does not want the centripetal acceleration to exceed 7.00 times free-fall acceleration.
Answer:
The force will be "5,488". A further solution is provided below.
Explanation:
The given values are:
speed,
v = 100m/s
mass,
m = 80 kg
acceleration,
a = 7
Now,
Radius will be:
⇒ [tex]r=\frac{v^2}{ac}[/tex]
⇒ [tex]=\frac{(100)^2}{7\times 9.8}[/tex]
⇒ [tex]=\frac{10000}{68.6}[/tex]
⇒ [tex]=145.77[/tex]
Force will be:
⇒ [tex]F=m\times ac[/tex]
⇒ [tex]=80\times 68.6[/tex]
⇒ [tex]=5488[/tex]
if a car was moving at a speed of 25mph for 6 hours, how far would the car travel?
Answer:
150 miles
Explanation:
25mph x 6hrs = 150miles
Match the type of boundary with it's characteristic
Answer:
Transform= not destroyed or created
Divergent= crust created
Convergent= crust destroyed
Explanation:
The plates move in the opposite or away from each other at a transforming plate boundary. The two platform borders are not produced or destroyed in this case. As both plates converge on each other and thus destroy the plates for converging plate boundaries. When the plate is divergent, both plates shift away from each other by opening up and solidification for a new crust.
Answer:
Transform= not destroyed or created
Divergent= crust created
Convergent= crust destroyed
Explanation:
A carpenter lifts a 10 kg piece of wood to his shoulder 1.5 m above the ground. What is the wood's potential energy on the carpenter's shoulder? (*Hint: "g" is the acceleration due to gravity of an object on Earth. G = 10 m/s^2)
Answer:
The wood's potential energy on the carpenter's shoulder is 150 J.
Explanation:
Given;
mass of the wood, m = 10 kg
height through which the wood was raised, h = 1.5 m
acceleration due to gravity, g = 10 m/s²
The wood's potential energy on the carpenter's shoulder is calculated as;
P.E = mgh
P.E = 10 x 10 x 1.5
P.E = 150 J
Therefore, the wood's potential energy on the carpenter's shoulder is 150 J.
Can you find the net force of one vertical force and one horizontal force, such as in the picture below? Yes or no, and why?
Answer:
jwuwhisbuebeu said that good morning and private s the
Answer:
the answer to this question is a⁵/c²
A car with a speed of 50ms is stopped when its brakes are pressed. The displacement passed before stopping is 150 m. How much deceleration is the car?
The frequency of a sound wave corresponds to its
A car is launched by a spring and goes to the top of a loop. Fill in the energy bar chart by drawing a vertical bar(s) in the correct position (both Initial & Final conditions).
Answer:
A) the initial point all energy is elastic potential and the final point all energy is kinetic
B) a bar graph the two bars have the same height and the sum of their height is the initial energy
C) two bars, one for the kinetic energy and the other for the gravitational potential energy.
Explanation:
A) For this exercise we must use the energy conservation relations
starting point. When the spring is compressed
Em₀ = K_e = ½ k x²
end point, at the bottom of the loop
Em_f = K = ½ m v²
energy is conserved
Em₀ = Em_f
½ k x² = ½ m v²
v = [tex]\sqrt{ \frac{k}{m} }[/tex] x
In a bar graph the initial point all energy is elastic potential and the final point all energy is kinetic
B) intermediate point in a quarter of the radius
In this case we use the lower part of the loop as the starting point and the quarter part of the bow as the end point.
Em₀ = K
Em_f = K + U = ½ m v² + m g R
in a bar graph the two bars have the same height and the sum of their height is the initial energy
C) End point highest part of the loop
starting point, bottom of loop
Emo = K = ½ m v₀²
from part A of the exercise we saw that it is equal to the elastic energy of the spring
final point. Highest part of the loop
Emf = K + U
Em_f = ½ m [tex]v_{f}^2[/tex] + mg (2R)
where R is the radius of the loop
Em₀ = Em_f
1/2 m v₀² = 1/2 m v_{f}^2+ mg 2R
v₀² = v_f^2 + 4gR
In a bar graph there are two bars, one for the kinetic energy and the other for the gravitational potential energy. The sum of the heights of these bars is the initial energy, so the energy is transformed but not created or destroyed in the process.
What is the impulse of a dodgeball hitting a person in the face if it's initial velocity was 10m/s and it's velocity after hitting him in the face it is 5m/s? The ball weighs 3kg.
Answer:)
Explanation:)
If a wave is traveling at a certain speed and it's frequency is doubled,what happens to the wavelength of that water
Answer:
If the frequency is doubled the wavelength is only half as long.If you put your fingertip in a pool of water and repeatedly move it up and down,you will create circular water waves.
Hope this helps!!!
A 6 cm object is 8 cm from a convex lens that has a focal length of 2.7 cm. The image is 4 cm from the lens.
The height of the image is
cm ______
Answer:
3cm
Explanation:
The height of the image will be "3 cm".
Convex lensAccording to the question,
Size of object, u₀ = 6 cm
Distance of object, u = 8 cm
Focal length, f = 2.7 cm
Distance of image, v = 4 cm
Let,
Height of image be "[tex]v_i[/tex]".
We know the formula,
→ Magnification, M = [tex]\frac{Distance \ of \ image}{Distance \ of \ object}[/tex]
By substituting the values, we get
= [tex]\frac{4}{8}[/tex]
= 0.5
hence,
The image's height be:
→ M = [tex]\frac{Height \ of \ image \ (v_i)}{Height \ of \ object \ (u_0)}[/tex]
0.5 = [tex]\frac{v_i}{6}[/tex]
By applying cross-multiplication,
[tex]v_i[/tex] = 0.5 × 6
= 3 cm
Thus the response above is correct.
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frequency of sound determines its _____ measured in _____.
amplitude: amplitude of sound wave determines its _____ measured in _____.
Answer:
Loudness of sound is determined by its amplitude.
Loudness of sound is determined by its amplitude.The intensity or loudness of a sound depends upon the extent to which the sounding body vibrates, i.e., the amplitude of vibration. A sound is louder as the amplitude of vibration is greater, and the intensity decreases as the distance from the source increases.
Which of the following describes how energy is converted when a cat knocks a plant off of a counter?
A. The potential energy of the car is converted into kinetic energy.
B. The kinetic energy of the cat is converted into potential energy.
C. The potential energy of the plant is converted into kinetic energy.
D. The kinetic energy of the plant is converted into potential energy.
Answer:
c
Explanation:
tell me if im write
Part A: Multiple TRUE/FALSE
1. Which of the following statements about vectors and scalars are TRUE? List all that apply.
- A vector is a large quantity and a scalar is a small quantity.
- A scalar quantity has a magnitude and a vector quantity does not.
- A vector quantity is described with a direction and a scalar is not.
-Scalar quantities are path dependent quantities and vector quantities are not.
- A scalar quantity depends only upon the initial and final values of the quantity; this is not the case for vector quantities.
- The quantity 20 m/s, north is a speed and as such is a scalar quantity.
- The quantity 9.8 m/s/s is an acceleration value and as such is a vector quantity.
A vector quantity is described with a direction and a scalar is not.
Scalar quantities are path-dependent quantities and vector quantities are not.
Explanation:
Scalar quantity:
It is a physical quantity that only has magnitude.It is a 1-dimensional Its changes when magnitude changes.It can't be resolved.It is a path-dependent quantity.If any mathematical operation is applied between two or more scalar quantities will give a scalar.For example: mass, time, energy, etcVector quantity
It is a physical quantity that has magnitude and direction.It can be the 1-dimensional,2-dimensional, or 3-dimensional Any change in it changes its direction or magnitude or both.It can be resolved.It only depends on the initial and final values of quantities.If any mathematical operation is applied between two or more vector quantities will give a scalar or vector.For example: force, velocity, pressure, etc.So from this, we can conclude that the true statements out given statements in the question are:
A vector quantity is described with a direction and a scalar is not.
Scalar quantities are path-dependent quantities and vector quantities are not.
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