Answers
Answer:
2,8
Explanation:
The first electron shell would have 2 electrons, the second shell would have 8 electrons. This is because Neon has a relative charge of 10.
Related Questions
Frequency= Wavelength = 502 km Speed= 100 m/s
Answers
Answer:
Explanation:
Wavelength = 100m. Speed = V. 2.) Frequency = 20 Hz. Wavelength = 200 m. Speed = ... 2=1.7m. F=Y/2 f=2×10. 5.) Wavelength = 502 km. Speed= 100 m/s.
You have been managing your time for years so you probably already have some ideas about what works for you. What are some effective time management strategies you have used at home at school or in the workplace? Why were they successful?
Answers
One of the most effective time management strategies that I have used is creating a to-do list. They are successful because they help me to prioritize tasks, remain organized, increase productivity, and reduce stress.
One of the most effective time management strategies that I have used is creating a to-do list.
Creating a to-do list helps me to prioritize tasks and ensures that I do not forget any important tasks.
When creating a to-do list, I ensure that I put the most important tasks at the top of the list and then work my way down.
The to-do list has helped me to organize my work, manage my time effectively and reduce stress.
Another effective strategy that I have used is breaking large tasks into smaller manageable tasks.
When dealing with complex tasks, I break them down into smaller, more manageable chunks.
This helps me to focus on the individual parts of the task, which are easier to handle and manage.
When I focus on smaller tasks, I find it easier to get started, and I gain momentum as I make progress on each small task.
This method has helped me to increase my productivity and reduce the stress that comes with handling large tasks.
In conclusion, the above time management strategies have helped me to manage my time effectively at home, school, and in the workplace.
They are successful because they help me to prioritize tasks, remain organized, increase productivity, and reduce stress.
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Describe the pattern you see in the chart PLEASE HURRY IS URGENT
Answers
Answer:
0-0
Explanation:
Forgive me..... I'm getting points 0-0
which statement is ture about the factors affecting physical fitness
Answers
Answer:
We can control some of the factors but not all of them.
Answer:hi
Explanation:
An object with charge -q is in motion near a wire that has a current I to the right. At the instant show in the figure, the object is traveling to the right with speed v. Both the wire and the motion of the object are in the plane of the page. Which of the following statements is true about the force on the object due to the current I at the instant shown?
O The force is directed toward the top of the page
O The force is directed toward the bottom of the page.
O The force is directed toward the right.
O There is no force on the object due to the current.
Answers
The correct answer is option A). The force is directed toward the top of the page.
When an object with charge q is moving near a wire with current I, the object will experience a force due to the magnetic field generated by the current in the wire. The direction of this force is determined by the right-hand rule.
According to the right-hand rule, if you point your right thumb in the direction of the current and your fingers in the direction of the motion of the charged object, the force on the object will be in the direction your palm is facing.
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Frozen food will thaw more quickly when placed under running water than if it
is immersed in water. Why?
Answers
Answer:
google answers, i'm not 100% on how to type my own answer
Explanation:
Thaw food submerged under running water at a temperature of 70˚F (21˚C) or lower. The water flow must be strong enough to wash food particles into the overflow drain. In a microwave oven. You can safely thaw food in a microwave oven if the food will be cooked immediately.
The reason defrosting in water is preferable is because water conducts heat better than air. And the faster food is thawed, the better it tastes.
Answer:
The reason defrosting in water is preferable is because water conducts heat better than air. And the faster food is thawed, the better it tastes.
What type of energy shows motion?
Answers
Answer:
kinetic energy
Explanation:
Answer:
Kinetic energy
Explanation:
A speeding bullet, a walking person, and electromagnetic radiation like light all have kinetic energy.
Which law of thermodynamics does each of the following scenarios violate (if any)?
A machine that can turn 1000J of heat directly into 1000J of electricity
1.
The first law of thermodynamics
2.
The second law of thermodynamics
3.
The third law of thermodynamics
4.
It is allowed
Answers
Answer: The scenario violates the second law of thermodynamics.
Explanation: The second law states that heat cannot be converted into work without some loss of usable energy, and that the amount of usable energy in a closed system will always decrease over time. Therefore, the machine described in the scenario cannot exist because it would violate the second law by converting all of the heat into electricity without any loss of usable energy.
What happens to the resistance of a wire as it gets wider
Answers
Answer:
it snaps
Explanation:
the more force you put on it, the wired out it gets than it snaps. I think
Part A
Which factors affect the speed of ocean waves?
Answers
Please please help!!!
The half-life of uranium-238 is about 4.5 billion years. How does this isotope's long half-life make it useful for finding the
age of rocks on Earth and in space?
Answers
Answer:
Because the half-life is as long as Earth has existed, virtually all rocks on Earth still have most of their uranium-238. So, measurements can easily be obtained.
Explanation:
exact answer from pluto/ edmentum
The significant part of the chemical composition of rocks is uranium. The half -life of uranium is close to the age of earth. Hence, by measuring the uranium content in rocks we can predict its age.
What is uranium?Uranium is 92nd element in periodic table. It is an actinide element. All the actinides are radioactive in which the most common is uranium. They all undergo radioactive decay process. Radioactive decay is a first order reaction. The rate constant K can be written as:
k = 1/t ln (W0/Wt)
where t is the tome of decay, W0 be the initial amount and Wt is the amount after time t.
here k = 0.693/t1/2
By this relation we can find t the age of a substance, if know the amounts and half life t1/2. Uranium is present in rocks and minerals. Uranium undergo nuclear decay and will forms its isotopes or new products.
Thus, by measuring the current amount of uranium in rocks by knowing the half life of uranium we can predict the age of rocks.
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Part A
The goal of your paper is to describe the history of the discovery and research of Proxima Centauri. Another goal is to find the possibilities of traveling to this star. Some questions that your paper should answer are:
When was Proxima Centauri discovered?
How was Proxima Centauri discovered?
How have scientists researched Proxima Centauri?
What technologies have they used? What types of data do these technologies collect?
Have spacecraft ever reached this star?
What are the limitations of sending spacecraft to Proxima Centauri?
What accommodations would humans need to travel to Proxima Centauri?
Now write down two more questions you have about Proxima Centauri that you plan to answer in your paper.
Answers
Answer:
Proxima Centauri was discovered in 1915.
Robert Innes used a blink comparator to examine a photographic plate showing an area of 60 square degrees around Alpha Centauri.
The sixty-four-meter radio telescope at Parkes Observatory in Australia.
they used the James Webb Space Telescope and The sixty-four-meter radio telescope.
no nothing as been to Proxima Centauri it would take about 54,400 years to get there.
getting to Proxima Centauri, our solar system's nearest star, would take four years and three months. And that is travelling at light speed, a velocity well beyond our reach. The quickest we could currently get to Proxima Centauri, using our fastest rockets, is 80,000 years.
Explanation:
a suspension bridge cable is connected to its anchor at a 20 degree angle. calculate the vertical component force on the anchor by the cable.
Answers
The question is missing some parts. Here is the complete question.
A suspension bridge cable is connected to its anchor at a 20° angle. Find the vertical and horizontal component of the force on the anchor by the cable.
Answer: \(F_{x}=\) 14095.4 N
\(F_{y}=\) 5130.3 N
Explanation: The force applied to the anchor is not perpendicular to the horizontal plane. So, it can be decomposed into 2 components: a vertical component, which is on the y-axis, and a horizontal component, which is on the x-axis.
The force and its components forms a right triangle, so we can calculate the components by using trigonometric relations:
Horizontal
\(cos(20)=\frac{F_{x}}{F}\)
\(F_{x}=F.cos(20)\)
\(F_{x}=15,000(0.9397)\)
\(F_{x}=\) 14,095.4 N
Vertical
\(sin(20)=\frac{F_{y}}{F}\)
\(F_{y}=Fsin(20)\)
\(F_{y}=\) 15,000(0.3420)
\(F_{y}=\) 5,130.3 N
The vertical and horizontal components of force on the anchor by the cable are 5130.3 N and 14095.4 N, respectively.
Objects want to keep doing the same thing is a way of stating ....
Answers
Answer:
Objects want to keep doing the same thing is a way of stating Newtons First Law.
The correct option is (a) inertia. "Objects want to keep doing the same thing" it implies a connection to the principle of inertia in physics. Inertia is the property of matter that resists changes in its state of motion or rest.
According to Newton's first law of motion, an object will remain at rest or continue moving in a straight line at a constant velocity unless acted upon by an external force. This property is commonly known as "the law of inertia." In other words, objects tend to maintain their current state of motion (whether at rest or in motion) unless influenced by an external force.
When we say "Objects want to keep doing the same thing," we're drawing an analogy between this scientific principle and human behavior. It suggests that objects, like humans, have a natural inclination to resist change and continue their current course of action. This analogy helps convey the idea that objects exhibit a tendency to persist in their existing state.
"Objects want to keep doing the same thing" to inertia emphasizes the notion that objects, like humans, tend to maintain their current state of motion or rest unless influenced by an external force.
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The correct question is:
Objects want to keep doing the same thing is a way of stating ......
a) inertia
b) force
c) power
d) moment
Masses m and 2m are joined by a light inextensible string which runs without slipping over a uniform circular pulley of mass 2m and radius a. Using the angular position of the pulley as generalized coordinate, write down the Lagrangian function and Lagrange's equation. Find the acceleration of the masses.
Answers
Answer: the acceleration of the masses is given by = 0, which means the angular acceleration of the pulley is zero. This implies that the masses m and 2m move with constant velocity, they are in equilibrium.
What is the acceleration of the object at t = 4s?
Answers
Answer:
no answer of this bcuz to find aclleration.initial velocity and final velocity too... I think question is wrong
An adventurous cliff jumper runs horizontally off a cliff at time t = 0. We can ignore air resistance.
Which graph best describes the cliff jumper’s vertical displacement over time?
THE ANSWER IS IN THE ATTACHMENT!
Answers
The graph C best describes the cliff jumper's vertical displacement as shown in the attachment.
The initial vertical velocity of the cliff jumper would be zero as the cliff jumper runs off the cliff horizontally. As he jumps off, he is subjected to gravitational pull. This increases his velocity with respect to time.
During some of the initial time, the displacement would be lesser as his velocity increases with increase in time. Also the graph is in the 4th quadrant because the vertical displacement is downwards ( Negative ) as the time increases ( Positive ).
Therefore, the graph with a curve that lies in 4th quadrant with a lesser initial displacement is the correct answer.
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A student at another university repeats the experiment you did in lab. Her target ball is 0.860 m above the floor when it is in the target holder and the steel ball she uses has a mass of 0.0120 kg. She finds that the target ball travels a distance of 1.40 m after it is struck. Assume g = 9.80 m/s2. What is the kinetic energy (in joules) of the target ball just after it is struck?
Answers
Answer:
11.8 Joules
Explanation:
Given:-
- The height of the target ball, si = 0.860 m
- The mass of target and steel ball, m = 0.012 kg
- The target ball travels a distance ( x ) after being struck = 1.40 m
Find:-
What is the kinetic energy (in joules) of the target ball just after it is struck?
Solution:-
- We are given the initial distance of the target ball as 0.86 m above the floor which travels a distance ( x ) after being struck.
- We will employ the one dimensional kinematic equation of motion to determine the initial velocity ( vi ) of the target ball as follows:
\(vf^2 = vi^2 - 2*g*x\)
Where,
vf: The final velocity of target ball at maximum height = 0
g: The gravitational acceleration constant = 9.8 m/s^2
- Plug in the required parameters and evaluate the ( vi ) as follows:
\(0^2 = vi^2 - 2*( 9.80 )*( 1.40 )\\\\vi^2 = 27.44\\\\vi = \sqrt{27.44} = 5.24 m/s\)
- The kinetic energy ( Ek ) of an object with mass ( m ) and initial velocity ( vi ) is expressed as:
\(E_k = 0.5*m*(vi)^2\\\\E_k = 0.5*0.86*27.44\\\\E_k = 11.8 J\)
Answer: The kinetic energy of the target ball just after it is struck is 11.8 Joules.
An aluminum "12 gauge" wire has a diameter d of 0.205 centimeters. The resistivity ρ of aluminum is 2.75×10−8 ohm-meters. The electric field in the wire changes with time as E(t)=0.0004t2−0.0001t+0.0004 newtons per coulomb, where time is measured in seconds.Find the current I through the conductor at time 5.0 seconds.
Answers
Answer:
I = 4.75 A
Explanation:
To find the current in the wire you use the following relation:
\(J=\frac{E}{\rho}\) (1)
E: electric field E(t)=0.0004t2−0.0001t+0.0004
ρ: resistivity of the material = 2.75×10−8 ohm-meters
J: current density
The current density is also given by:
\(J=\frac{I}{A}\) (2)
I: current
A: cross area of the wire = π(d/2)^2
d: diameter of the wire = 0.205 cm = 0.00205 m
You replace the equation (2) into the equation (1), and you solve for the current I:
\(\frac{I}{A}=\frac{E(t)}{\rho}\\\\I(t)=\frac{AE(t)}{\rho}\)
Next, you replace for all variables:
\(I(t)=\frac{\pi (d/2)^2E(t)}{\rho}\\\\I(t)=\frac{\pi(0.00205m/2)^2(0.0004t^2-0.0001t+0.0004)}{2.75*10^{-8}\Omega.m}\\\\I(t)=4.75A\)
hence, the current in the wire is 4.75A
Which of the following is NOT a mental process?
Select one:
a. Walking on the beach
b. Solving the math problem
c. Thinking of the correct answer
d. Choosing the right answer
Answers
Answer:
Its A. Walking on the beach
Answer:
walking on a bench is the answer
Two parallel very long straight wires carrying current of 5A each are kept at a separation of 1m. If the currents are in the same direction, the force per unit length between them is __________
Answers
Answer:
The force per unit between the two parallel wires with same current flowing in the same direction is 5 x 10⁻⁶ N/m repulsive force.
Explanation:
Given;
current though the two parallel wires, I₁ and I₂ = 5A
distance between the two wires, R = 1 m
The force per unit of the wires is calculated as;
\(\frac{F}{L} = \frac{\mu_o I_1I_2}{2\pi R}\)
Where;
μ₀ is permeability of free space = 4π x 10⁻⁷ m/A
Substitute in the given values into the equation and determine the force per unit length (F/L).
\(\frac{F}{L} = \frac{\mu_o I_1I_2}{2\pi R} \\\\ \frac{F}{L} = \frac{4\pi *10^{-7}*5*5}{2\pi *1}\\\\ \frac{F}{L} = 5*10^{-6} \ N/m \ (repulsive)\)
Therefore , the force per unit between the two parallel wires with same current flowing in the same direction is 5 x 10⁻⁶ N/m repulsive force.
Two horizontal forces, 225 and 165 N, are exerted on box. If these forces are applied on same direction, find the net horizontal force on the box.
Answers
When two forces are applied in the same direction, we can use the vector addition to find the net force. The net force is found by adding the magnitudes of both forces.
In this case, the two forces are 225 N and 165 N, and they are applied in the same direction.
Therefore, the net horizontal force on the box is:
Net force = force 1 + force 2 = 225 N + 165 N = 390 N
This means that the net force acting on the box is 390 N when two horizontal forces, 225 N and 165 N, are exerted on the box in the same direction.
4. When scientists calculate the trajectory a satellite takes on its way to
study a planet, what do you think they use?
5 points
A Speed and velocity
B. Velocity and acceleration
O C. Speed, velocity, and acceleration
O D. Speed only
Answers
When scientists calculate the trajectory a satellite takes on its way to
study a planet, they use C. Speed, Velocity, and acceleration.
A trajectory, often known as a flight path, is the route taken by an object moving under the influence of gravity. Typically, the phrase is applied when referring to projectiles or satellites. A parabola curve is usually a decent approximation of the trajectory form when an object is propelled for in a short distance.
When scientists calculate the trajectory a satellite takes on its way to
study a planet they take the speed, velocity, and acceleration into consideration.
The formula for calculating the trajectory can be expressed as:
\(\mathbf{y = h + xtan (\alpha) - \dfrac{gx^2 }{2V_o^2cos^2 (\alpha)}}\)
where;
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a student that just received their driver's license decides to buy a new car. he remembers from physics class that heat engines have thermal efficiency that can be calculated. he asks the car dealer for a car that has a high thermal efficiency rating. the car dealer say he has a car that is 100% efficient. which law of thermodynamics best describes why the car cannot be 100% efficient?
Answers
Answer: the first law of thermodynamics
Explanation:
The second law of thermodynamics is the best description for the car to cannot be having 100% efficient engine.
What is the second law of thermodynamics?Thermodynamics is the branch of science which deals with the study of heat. Heat is a form of energy which exists as a result of the change in the temperature between the two bodies or objects under study.
The second law of thermodynamics is a physical law, which is based up on the universal experience concerning with the heat and energy interconversions between bodies present in the system and surrounding. One simple statement of this law is that, the heat energy always moves from the hotter objects to the colder objects, unless the energy in some form is supplied to the object to reverse the direction of heat flow between the objects.
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How did earth change about 2.5 billion years ago when many organisms began using photosynthesis to make food
A. The amount of oxygen in the atmosphere increased
B. Mass extinctions occurred
C. The oceans became larger
D. Rainfall increased
Answers
How do lenses and mirrors compare in their interactions with light?
A. Lenses spread light apart; mirrors do not.
B. Lenses bounce light from their surface; mirrors do not.
C. Lenses bring light to a point; mirrors do not.
D. Lenses bend light as it passes through; mirrors do not.
Answers
Answer:
B.lenses bounce light from their surface, mirrors do not
what is the difference btw specific capacity and heat capacity.
Answers
Answer: Specific heat is the amount of heat energy required by a unit of mass of a substance to raise its temperature through1℃ or 1 k. On the other hand, heat capacity is the amount of heat energy required by a substance to raise its temperature by 1℃ or 1 K.
Explanation:
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Two point charges each carrying a charge of +3.5 E−6 C are located 3.5 meters away from each other.
How strong is the electrostatic force between the two points (k = 9.0 E9 Nm2/C2)?
Is this force a repulsive force or an attractive force?
Remember to identify all data (givens and unknowns), list equations used, show all your work, and include units and the proper number of significant digits to receive full credit.
Answers
Charge on each point, q = +3.5E-6 C
Distance between the points, r = 3.5 m
Coulomb's constant, k = 9.0E9 Nm²/C²
The equation for the electrostatic force between two point charges is given by:
F = k * (q1 * q2) / r^2
where F is the force between the charges, q1 and q2 are the magnitudes of the charges, r is the distance between the charges, and k is Coulomb's constant.
Substituting the given values, we get:
F = (9.0E9 Nm²/C²) * [(3.5E-6 C) * (3.5E-6 C)] / (3.5 m)²
F = 2.3E-2 N
Therefore, the electrostatic force between the two point charges is 2.3E-2 N.
Since both charges are positive, the electrostatic force between them is a repulsive force.
Answer: the answer is 0.009N
Explanation: as we know, force =KqQ/R^2
F= 9*10^9*3.5*10^-6*3.5*10^-6/(3.5)^2
F=9*10^-3N
According to the graph below, which of the statements about these cars must be true? A) The speed of car C is greater than the speed of car D. B) At time t = 10 s, both cars have the same velocity. C) The cars meet at time t = 10 s. D) Both cars have the same acceleration. E) The magnitude of the acceleration of car C is less than the magnitude of the acceleration of car D.
Answers
According to the graph below, the statements about these cars must be true are :
At time t = 10 s, both cars have the same velocityThe cars meet at time t = 10 soptions B and C are correct
What is velocity?Velocity is described as the directional speed of an object in motion as an indication of its rate of change in position as observed from a particular frame of reference and as measured by a particular standard of time.
There are some similarities between velocity and speed and they include:
Both are physical quantities, so both can be measured and quantified. Both the terms (speed and velocity) are associated with moving body only; not with static body. Both have same unit of measurementVelocity (v) is known as a vector quantity that measures displacement (or change in position, Δs) over the change in time.
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The graph is attached below:
Microwaves have a frequency of 10 000 million Hz. Their wavelength is 0.03 m.
Calculate the speed of microwaves.
Show clearly how you work out your answer.
Answers
The speed of the microwaves is 3 × 10^10 meters per second. This result indicates that microwaves, like all electromagnetic waves, travel at the speed of light in a vacuum.
The speed of a wave can be calculated using the formula: speed = frequency × wavelength. In this case, the frequency of the microwaves is given as 10,000 million Hz, which is equivalent to 10,000 × 10^6 Hz or 10^10 Hz. The wavelength is given as 0.03 m.
Plugging these values into the formula, we have:
Speed = (10^10 Hz) × (0.03 m)
Simplifying the calculation, we find:
Speed = 3 × 10^10 m/s
Therefore, the speed of the microwaves is 3 × 10^10 meters per second. This result indicates that microwaves, like all electromagnetic waves, travel at the speed of light in a vacuum. The speed of light is approximately 3 × 10^8 meters per second, so microwaves have a slightly higher speed due to their longer wavelength. It's important to note that the speed of light is a fundamental constant of nature and does not depend on the properties of the specific electromagnetic wave being considered.
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