Calcium Bromide, commonly known as calcium dibromide, is an ionic compound since the second element is a nonmetal, resulting in an ionic compound. It is referred to as a hydrated salt.
What is a Compound?A chemical compound is a material made up of several similar molecules that include atoms from more than one chemical element and are kept together by chemical bonds. A molecule made up of only one element's atoms is hence not a compound.
What is a solution?A solution is a form of homogenous combination made of two or more components in chemistry. A solute in such a combination is a material that has been dissolved in another substance known as a solvent.
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a recipe calls for 30.0mL of baking soda. calculate the of the baking soda given its denstiy of 2.20g/mL
The mass of baking soda required that will have a volume of 30 mL is 66 g.
What mass of baking soda will have a volume of 30.0 mL given that the density of baking soda is 2.20 g/mL?The mass of a substance can be determined if the volume and the density of the substance are known.
The mass of a substance is related to the density and the volume of the substance by the following equation:
mass = density * volume
Considering the data provided about the baking soda:
volume of baking soda required = 30.0 mL
density of baking soda = 2.20 g/mL
Hence, mass of baking soda will be;
mass of baking soda = 2.20 g/mL * 30.0 mL
mass of baking soda = 66 g
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what was a control variable in this experiment? group of answer choices type of wire used final length of wax original length of wax thermal conductivity of wire
In the given experiment, the length of the wire, the type of wire utilized, and the thermal conductivity of the wire are the independent variables.
In the mentioned experiment, three kinds of variables are used, that is, the independent variable, the dependent variable, and the controlled variable. Of these the independent variables are the one that does not get modified, however, can be modified by the scientist, while the dependent variables are the one that modifies when the independent variables modify, and the controlled variables are the ones that are maintained the same throughout.
In the given experiment, the length of the wire, the type of wire utilized, and the thermal conductivity of the wire are the independent variables.
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Explain why astronomers use light years or astronomical units to describe distances in space instead of miles or meters.
Both the solar system and interstellar space are very large. 150 million kilometers are equivalent to one astronomical unit. Instead of having to count everything in millions or billions of kilometers, it is much simpler to count the distances if they are in counts of Astronomic Units.
Why light years are used as a distance measurement in astronomy?Astronomers can establish how far back in time they are looking by measuring in light-years. Everything we see in the night sky has already happened since it takes light time to reach our eyes. In other words, if you see something from a distance of 1 light-year away, you see it precisely as it was a year ago.However, the fundamental justification for utilizing light years is due to the vast distances we deal with in space.Due to the fact that objects in space are too far apart from one another, astronomers measure distance in space using an astronomical unit called a light-year rather than kilometers. The distance that a beam of light travels in a single year on Earth is referred to as a "light-year."By counting the wavelengths—the separation between successive peaks of the wave pattern—between two places, laser light is commonly employed to measure distances. The approach is inherently very precise due to the short wavelength (633 nanometers for the most common red light utilized).Why do astronomers use light years or astronomical units to describe distances in space instead of miles or meters?
Both the solar system and interstellar space are very large. 150 million kilometers are equivalent to one astronomical unit. Instead of having to count everything in millions or billions of kilometers, it is much simpler to count the distances if they are in counts of Astronomic Units.
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What is the “fight or flight” response and how does caffeine trigger this response?
Answer: Caffeine can change your response pattern; that jlot of wonderful energy people love can send your brain and body panicking which in tow starts up your flight or fight response.
How do signals from sensory neurons reach motor neurons?
Responses:
A-Signals move from dendrite to dendrite towards motor neurons.
B-Through interneurons in the brain and spinal cord that connect sensory neurons and motor neurons.
C-Motor neurons signal for the body to move the signal toward them.
D-Signals from sensory neurons do not get sent to motor neurons.
B. Signals from sensory neurons reach motor neurons through interneurons in the brain and spinal cord that connect sensory neurons and motor neurons.
What is sensory neurons?Sensory neurons are the nerve cells that work based on the sensory input from outside stimulus.
What is motor neurons?Motor neurons are special type of neurons or never cells that are found within the spinal cord and the brain.
How do signals from sensory neurons reach motor neurons?The sensory neurons carry afferent impulse to the central interneuron, which connects with the motor neuron.
The motor neuron carries efferent impulses to the effector, and cause the response observed.
Thus, signals from sensory neurons reach motor neurons through interneurons in the brain and spinal cord that connect sensory neurons and motor neurons.
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Who developed the equation that allowed the energy of the electron to be described quantum mechanically?.
Erwin Schrödinger developed the equation that allowed the energy of the electron to be described quantum mechanically.
Schrödinger's equation is,
Hamiltonian operator * Wave function = Energy * Wave function
It is partial differential equation which describes the wave function of a quantum - mechanical system. It is the most important part of quantum wave mechanics.
At first, Louis de Broglie stated that all particles could be treated as matter waves. Then Erwin Schrödinger specifically introduced a model of an atom, in which electrons are treated as matter waves.
Therefore, Erwin Schrödinger developed the equation that allowed the energy of the electron to be described quantum mechanically.
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What happens to the force between two charges if the magnitude of both charges is doubled and the distance between them is cut in half?
If the distance between the two charges is doubled, the attraction or repulsion becomes weaker, when the distance between the two charges is halved, the force is increased four times.
What do you mean by force?An object with mass feels a push or pull, which modifies its velocity. An agent with the ability to change a body's resting or moving condition is known as an external force.
Briefing:As stated, the distance between them that is divided in half is equal to r/2.
Let [tex]F_{\prime}[/tex] be the force when the distance is cut in half between the charges.
It is possible to express the force between the two charged particles as
where, q1 and q2 are the charges, r is the distance, is k constant of proportionality(Coulomb's constant), F is the force between the charges.
Calculation of the force at a halving of the distance between the charges
The force is reduced by half when the distance is:
[tex]F=\frac{k q_1 q_2}{r^2}[/tex]
[tex]F \prime=\frac{k q_1 q_2}{\left(\frac{r}{2}\right)^2}[/tex]
[tex]F /=\frac{4 k q_1 q_2}{r^2}[/tex]
[tex]F_{\prime}[/tex] = 4F
As a result, when the space between the two charges is cut in half, the force is multiplied by four.
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I'm kind of in a hurry would love if you help me here
At a certain instant a moving object comes to
momentary rest.
Is that object accelerating at that moment?
Answer: no
Explanation:
momentary rest = object is NOT in motion at that instant of time
In the moment that the object is at rest, the velocity is 0 meaning that there is no acceleration.
The diagram above shows a current-carrying wire (the red dot),
that produces the magnetic field pattern shown in the diagram
when viewed from above.
Which direction is the current flowing in?
The direction of the current flowing in the wire is inside the plane when viewed from above.
The direction of a magnetic field in a current carrying conductor can be found out by using Right Hand Thumb Rule.
According to this rule. if we suppose a straight wire is carrying current, not if we align the thumb of our right hand in the direction of the flowing current, then the direction of the magnetic field is same as that of the the curling fingers.
In our question, if we apply this rule then we can find, if we align our fingers in the same manner as that of the magnetic field, then the direction of our pointing thumb will be inside. The direction of thumb pointing will be same as that of the current.
So, we can say that by Right Hand Thumb Rule, the direction of the flowing current is Inside when viewed from top.
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If the falling time of an object is doubled, by what factor does the distance increase?
Answer:
length
Explanation:
If the falling time of an object is doubled, it will then that means that the length is doubled
ILL GIVE 40 POINTS TO THE FIRST PERSON TO ANSWER
What is the most likely evidence of an energy transformation taking place when a wire that is twisted and turned breaks? (5 points)
1: Reddish glow is emitted as kinetic energy is transformed into thermal energy
2: Reddish glow is emitted as kinetic energy is transformed into electrical energy
3: Broken end of the wire turns hot as kinetic energy is transformed into thermal energy
4: Broken end of the wire turns hot as kinetic energy is transformed into electrical energy
Answer:
It is 3
Explanation:
the reason its 3 is the wire is electrical and it heats up like a phone screen after using it for too long and its kinetic energy to thermal because the energy in the wires stop when they are broken because there is no way the energy can jump the wires
What is the object displacement over the 9 seconds interval
The object displacement over the 9 seconds interval will be 0 m. Displacement can be define as the shift in the position of an object with respect to the reference frame.
What does a physical displacement mean?An object's location changes if it moves with regard to a reference frame, like when a passenger moves to the back of an airplane or a lecturer moves to the right with respect to a whiteboard. Displacement is the term used to explain this shift in position.
How is the displacement formula created?The distance an item travels from its starting point until it reaches a certain velocity can be calculated using the formulas t = (v vi)/g and y = gt2/2 + vit. The equation for the object's velocity at a particular distance from the starting point is the outcome of this.
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the velocity of a diver just before hitting the water is -10.1 m/s, where the minus sign indicates that her motion is directly downward. what is her displacement during the last 1.20 s of the dive?
The velocity of a diver just before hitting the water is -10.1 m/s, where the minus sign indicates that her motion is directly downward. -5.06 m is her displacement during the last 1.20 s of the dive.
What is velocity?Velocity is the directional speed of a moving item as an indication of its rate of change in position as seen from a specific frame of reference and measured by a specific time standard (e.g., 60 km/h northbound). The idea of velocity is crucial in kinematics, the part of classical mechanics that explains the motion of bodies.
A physical vector quantity called velocity requires both magnitude and direction to be defined. Speed is a coherent derived unit that expresses the scalar absolute value (magnitude) of velocity. Its quantity is expressed in SI units (metric system) of metres per second (m/s or ms1). For example, "5 meters per second" is a scalar while "5 meters per second east" is a vector.
We are given that
v = -10.1 m/s
t = 1.20 s
[tex]v_0[/tex] = ?
a = g = - 9.80 m/s²
as we know upward movement is positive and downward movement is negative, we can find [tex]v_0[/tex] with this formula
⇒ v = [tex]v_0[/tex] + at
⇒ -10.1 = [tex]v_0[/tex] + (- 9.80 )(1.20)
⇒ -10.1 = [tex]v_0[/tex] - 11.76
⇒ [tex]v_0[/tex] = 1.66 m/s
As we have found velocity, now we can find displacement with this formula
⇒ [tex]\lambda[/tex] = [tex]v_0[/tex] t + [tex]\frac{1}{2} at^2[/tex]
⇒ [tex]\lambda[/tex] = (1.66 m/s)(1.20 s) + [tex]\frac{1}{2}[/tex](- 9.80 m/s²)(1.20 s)²
⇒ [tex]\lambda[/tex] = 1.992 m - 7.056 m
⇒ [tex]\lambda[/tex] = -5.064 m
= -5.06 m
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Suppose you go on a trip that covers 360 km and takes 6 Hours. What would your average speed be? 2. A car travels around a mountain. It travels a distance of 120 miles in 3 hours. What is the average speed of the car?
I need the answer for this and I want a step by step explanation on how you got the answer and if I need to use formulas.
Answer:
1. 360/6=60 Kilometers per hour
2. 120/3=40 Kilometers per hour
define center of gravity
Answer: a point from which the weight of a body or system may be considered to act. In uniform gravity it is the same as the center of mass.
Explanation:
look it up
How do scientific ideas change? Give an example
Explanation:
Question How do scientific ideas change? Give an exampleAnswerScientific ideas change over time as our evidence improves. The more experiments we do and the more data we collect, the better our scientific ideas become.I hope you are clear buddy.A spherical balloon is inflated with gas at a rate of 700 cubic centimeters per minute. how fast is the radius of the balloon changing at the instant the radius is 40 centimeters?
Rate of change is used to mathematically describe the percentage change in value over a defined period of time
A spherical balloon is inflated with gas at a rate of 700 cubic centimeters per minute. the radius of the balloon will be changing at a rate of 0.035 cm/min at the instant the radius is 40 centimeters
given
Radius = 40 cm
dv / dt = 700
to find
Rate by which radius of balloon is changing = ?
volume of sphere = 4/3 π [tex]r^{3}[/tex]
dv/dt = 4/3 * π [tex]r^{3}[/tex] dr/dt
dv/dt = 4/3 * 3 * π [tex]r^{2}[/tex] dr/dt
dv/dt = 4/3 * 3 * (3.14) * ([tex]40^{2}[/tex]) dr/dt
dv/dt = 20096 dr/ dt
700 = 20096 dr/dt
dr/dt = 700 / 20096
= 0.035 cm/min
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A green car travels on the highway at 12 m/s. A red car is behind the green car and traveling at 19 m/s. If it takes the red car 2 minutes to catch the green car, how far apart were they to begin with?
The two cars (red and green) are 2280 m apart
What is speed?Speed is the distance travelled per unit. Mathematically, it can be expressed as:
Speed = distance / time
With above formula, we can determine the distance by the red car. Details below
How to determine the distance travelled by the red carThe following data were obtained from the question:
Speed of red car = 19 m/sTime = 2 minutes = 2 × 60 = 120 secondsDistance =?The distance traveled by the red car in 2 mins ( i.e 120 s) can be obtained as followed:
Speed = distance / time
Cross multiply
Distance = speed × time
Distance = 19 × 120
Distance = 2280 m
Thus, the red and green cars are 2280 m apart
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3. A car speeds up from 10.0 m/s to 30.0 m/s in 3.0 s. What is its acceleration? In your response, show your work, the given and unknown quantities, the equation and any necessary algebra. Express your answer with the correct number of significant digits
Answer:
21.872
Explanation:
The mass of the car is 1200 kg.
(a) Calculate, for the first 20s of the motion,
(1) the distance travelled by the car
The distance travelled by the car in the first 20 seconds of the motion is 130 m.
What is the area under speed time graph?
The area under the speed-time graph is the distance the particle travels.
The distance traveled by the car in the first 20 seconds is calculated as follows;
From the speed - time graph, at 20 seconds, the speed of the car is 13 m/s.
Distance = area of the graph = area of triangle formed from time, 0 s to 20 seconds.
Distance = ¹/₂bh
where;
b is the base of the triangle formed = 20 s - 0 s = 20 sh is the height of the triangle formed = 13 m/sSubstitute the given parameters and solve for the distance traveled by the car.
Distance = ¹/₂bh
Distance = ¹/₂(20)(13)
Distance = 130 m
Thus, the distance travelled by the car in the first 20 seconds of the motion is 130 m.
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The missing graph is in the image attached.
How should these cells be connected (in series or in parallel) to produce a total potential of more than 0.100 v ?
To produce a total potential of more than 0.10 V, the cells must be connected in series such that every cell experiences the same current.
Connection in seriesIf the positive terminal of the first cell is connected to the negative terminal of the second cell and the positive terminal of the third cell, the cells are said to be connected in series. Every cell experiences the same current.
When ought cells to be linked in series?When one battery’s positive terminal is attached to the next one’s negative terminal, a group of batteries is said to be connected in series. The total algebraic sum of all the cells that is connected in series creates the totally battery’s overall emf.
Cells are connected from end to end to form a total series, allowing the same current to pass through each cell.
In a parallel connection the total potential difference remains the same and then this can be calculated as
Vtot = V
here V can be seen as the potential of each cell.
When in a series connection, the total potential difference of the capacitors cannot be counted as same unless their exact capacitances are same.
So, the potential differences of the capacitors can add up in total as
Vtot = V1 + V2 + V3 + and so on...
Here the total potential is seen as higher than the total individual capacitors.
So as to produce a total potential of more than 0.1 V, the cell must be connected in series.
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Complete Question
Electric eels and electric fish generate large potential differences that are used to stun enemies and prey. These potentials are produced by cells that each can generate 0.10 V. We can reasonably model such cells as charged capacitors.
How should these cells be connected (in series or parallel) to produce a total potential of more than 0.10 V?
A closed container holds 3,0 moles of co2 gas at stp. what is the total number of moles of ne that can be placed in a container of the same size at stp
By ideal gas approximation, the total number of moles of Ne is 3 moles.
We need to know about the ideal gas theory to solve this problem. The ideal gas is assumed that there is no interaction between particles in a gas. It can be determined by the equation
P . V = n . R . T
where P is pressure, V is volume, n is the number of moles gas, R is the ideal gas constant (8.31 J/mol.K) and T is temperature.
From the question above, we know that
STP condition (P = 1.01 x 10⁵ Pa, T = 273 K)
n = 3 moles
The ideal gas depends on the number of moles. Hence, the total number of moles of Ne will be the same as CO₂ (3moles).
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Who discovered the nucleus by bombarding gold foil with positively charged particles and noting that some particles were widely deflected?.
Answer:
Ernest Rutherford (later Lord Rutherford)
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Answer:
what do u need for this question
Several wires of varying thickness are all made of the same material and all have the same length. If the wires are arranged in order of decreasing thickness, what can be said about the ordering of their resistance?.
The wires will be arranged in order of increasing resistance.
The resistance of a wire is given by
[tex]R=\frac{pL}{A}[/tex]
where
p is the resistivity of the material
L is the length of the wire
A is the cross-sectional area of the wire
The only quantity that varies in this problem is the thickness, which corresponds to the value of A for each of the many wires, all of which are constructed of the same material and have the same length (same L).
Since the resistance R is inversely correlated with the cross-sectional area A, we can infer from the formula that the smaller the value of A, the higher the value of R. Accordingly, if we arrange the wires in decreasing order of thickness, we are actually doing so in increasing order of resistance.
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A small pebble is dropped from the top of a very high cliff. approximately how fast is the pebble traveling (in m/s) by the time it has dropped a distance of 125 meters?
A small pebble is dropped from the top of a very high cliff, the pebble will be moving with a speed of 50 m/s.
Calculationvi=0
vf=?
a= 10m/[tex]s^{2}[/tex]
s= 125m
By newton's third law of motion,
2as = [tex]v_{f} ^{2}[/tex] - [tex]v_{i} ^{2}[/tex]
[tex]v_{f} ^{2}[/tex] = 2x 10 x 125
[tex]v_{f}[/tex] = [tex]\sqrt{2500}[/tex] = 50m/s
What are the three motion equations?These are the three equations:
v = u + at.
S = ut + 1/2a[tex]t^{2}[/tex];
[tex]v^{2}[/tex] = [tex]u^{2}[/tex]+ 2as.
Explain what the equation of motion is?The fundamental equation of motion in classical mechanics is Newton’s second law, which states that the force F acting on a body is equal to the mass m of the body multiplied by the acceleration an of its center of mass, or F = ma.
What different motions are there?Motion can be divided into three categories depending on its type, as follows: linear movement and Rotational Motion in oscillations.
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What is Theoretical displacement
Displacement is the movement of unfavorable emotions from one thing or person to another.
As a kind of self-preservation, displacement is the act of shifting one's unfavorable emotions from one thing or person to another.
According to the notion, releasing stress or worry on a non-threatening target helps a person deal with negative emotions like fear or rage.
For instance, if a person feels angry because their boss yells at them, they might project those feelings onto someone or something else, such a member of their family or a piece of furniture.
For fear of losing their work, the person could feel unable to face their manager. As a result, they might vent their rage on a less dangerous person like their partner or housemate.
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consider a uniformly charged ring in the xy plane, centered at the origin. the ring has radius aaa and positive charge qqq distributed evenly along its circumference.
Ez = kqz / (z^2+a^2)^3/2 is the answer.
The expression of the electric field is,
E=kq / r^2
Here, r is the distance and its value is [tex]\sqrt{z^2 + a^2}[/tex]
Substitute the value of r in the above expression.
E=kq / [tex]\sqrt{z^2 + a^2}[/tex]^2
The expression of the electric field along the z-direction is given by,
dEz=dEcos[tex]\int\limits {dEcosθ} \,[/tex]
Here, the value of the cosine function is z / [tex]\sqrt{z^2 + a^2}[/tex]
On integrating the above expression and substituting the value
[tex]\int\limits{dEz} \,[/tex] =[tex]\int\limits{dEcosθ}[/tex]
Ez = Ecosθ
Ez = kq / [tex]\sqrt{z^2 + a^2}[/tex]^2 * z / [tex]\sqrt{z^2 + a^2}[/tex]
Ez = kqz / (z^2+a^2)^3/2
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Although part of your question is missing the question is Consider a uniformly charged ring in the XY plane, centered at the origin. The ring has a radius a and positive charge q distributed evenly along its circumference. What is the magnitude of the electric field along the positive z-axis due to the ring? Use k in your answer, where k=1/4πε
which is larger
a, 4 km
b, 4 mi
c, same size
Answer: (b) 4 mi
Explanation:
We will convert both options to a singular unit.
4 km ≈ 2.49 miles
Now, we can more easily compare them.
4 miles ? 2.49 miles
4 miles > 2.49 miles
b, 4 mi is larger