Answer:
Product
Explanation:
The force between two charges is given by :
[tex]F=\dfrac{kq_1q_2}{r^2}[/tex] ...(1)
Where
k is electrostatic constant
q₁ and q₂ are charges
r is the distance between charges
From equation (1), it is clear that the magnitude of the force is directly proportional to the product of charges.
HELP PLS MARKING BRANLIST 100 pts TAKING TEST RN
An airplane went from 120 m/s to 180 m/s in 4.0 seconds. What was its acceleration?
45 m/s2
15 m/s2
60 m/s2
30 m/s2
Answer:
15 m/s^2 The first thing to calculate is the difference between the final and initial velocities. So 180 m/s - 120 m/s = 60 m/s So the plane changed velocity by a total of 60 m/s. Now divide that change in velocity by the amount of time taken to cause that change in velocity, giving 60 m/s / 4.0 s = 15.0 m/s^2 Since you only have 2 significaant figures, round the result to 2 significant figures giving 15 m/s^2
Explanation:
How much power does an Ox pulling a plow 20 m cross a field, exerting 120J of work over a period of 15 s?
Answer:
8W
Explanation:
Given parameters:
Distance covered = 20m
Work done = 120J
Time = 15s
Unknown:
How much power does the Ox exerts = ?
Solution:
Power is the rate at which work is being done
Power = [tex]\frac{Work done }{time}[/tex]
Power exerted by ox = [tex]\frac{120}{15}[/tex] = 8W
Which of the following is NOT true about the relationship between electricity and magnetism?
A O All magnets are surrounded by an electric field.
B.
Generators use magnets to induce an electric current.
Motors use electric currents to generate an electric field.
D. A magnetic field can be used to generate an electric current.
How much work is done on a small car if a 1000 N force is exerted to move it 75
Answer:
75000J
Explanation:
Given parameters:
Force applied on the car = 1000N
Distance moved = 75m
Unknown:
Work done = ?
Solution:
The work done by a body is the force applied to move it through a particular distance.
So;
Work done = Force x distance
Therefore;
Work done = 1000 x 75 = 75000J
Calculate the resistance of an electric blanket that draws 9 A to transform 50 W of energy.
Answer:
The resistance is 0.617Ω.
Explanation:
Given that the formulas are V = I × R and P = I × V so when you substitute the V formula into P formula, you will get P = I² × R. Using this formula, you can find the resistance :
P = I² × R
50 = 9² × R
50 = 81 R
50 ÷ 81 = R
R = 0.617Ω (3sf)
What causes water to move from the liquid part of the hyrdrosphere to the cyrosphere?
Answer:
When the liquid moves through the hydrosphere, the water collects into a cloud. When it falls to the earth, turning into snow and sleet collecting in rivers and lakes.
Explanation:
Hope that helps
Answer:
The frozen part of the hydrosphere has its own name, the cryosphere. Water moves through the hydrosphere in a cycle. Water collects in clouds, then falls to Earth in the form of rain or snow. This water collects in rivers, lakes and oceans.
Where on the electromagnetic spectrum can you find infrared waves? Compare to gamma, x-ray, ultraviolet, and light waves.
Answer:
Infrared, Visible light, UV light, X-ray, gamma
Explanation:
Peaks in standing wave are called
Answer:
Antinode
Explanation:
The antinode is a point along the wave that has the greatest maximum velocity in the y-direction.
Sandra is riding a water slide at her favorite water park. At the top of the slide,
she has 5,000 J of gravitational potential energy. After a few seconds, she has
1,928 J of gravitational potential energy. What is her kinetic energy at this point,
in J?
Answer:
3072J
Explanation:
At all points through her slide, it is important to reiterate that energy is always conserved.
Kinetic energy is the energy due to the motion of a body.
Potential energy is the energy due to the position of a body.
Based on the law of conservation of energy, energy is neither created nor destroyed but simply transformed from one form to another.
So;
At all points:
Total energy = Potential energy + Kinetic energy
Since the initial energy = 5000J which is the potential energy
This is the total energy within the system as the kinetic energy at this point is 0;
After a few seconds, the potential energy is 1928J;
Kinetic energy = Total energy - potential energy = 5000J - 1928J
Kinetic energy = 3072J
A car's gas tank contains 58.7 kg
of gasoline, which takes up
0.0814 m^3 of volume. What is
the density of the gasoline?
Answer:
721 kg/m^3
Explanation:
Trust me bro
help please fast + i dont want an answer from g**gle .
Julio was standing at the Om line and ran west to the 50m line in 5s. What
was Julio's velocity?
O 10 m/s east
O 10 m/s west
O 250 m/s east
250 m/s west
can anyone help with this?
If the wavelength of a wave is quadrupied then what happens to the frequency of the wqve(Assume speed is constant)
Answer:
What happens to the wavelength of a wave if you double the frequency?
If the frequency of a wave is increased, what happens to its wavelength? As the frequency increases, the wavelength decreases. 2. If the frequency is doubled, the wavelength is only half as long.
Explanation:
please answer and fast i am in a test
Answer:
Online means connected to a network.
Credible means reliable or trustworthy
Cite means to quote from an article or book.
A frictionless pulley system connects a 150 Kg block of a flat surface with a coefficient of friction of 0.20 to a hanging 200 kg block. Determine the tension on the cord, the frictional force of the block on the surface, acceleration of descending block, and time required for a hanging block to full 10 meters.
Based on their locations on the periodic table, which two elements would you
expect to form positive ions with a +3 charge?
O A. Nitrogen, N
O B. Aluminum, Al
O C. Phosphorus, P
D. Boron, B
Answer:
i think it would be B. Aluminum, Al and D. Boron, B
Explanation:
since they're both in group 13 and they forms a 3+ ion
A student rides a bicycle for 15 miles in 3 hours. What is the student's speed? What else would you need to know for the velocity?
Answer:
5 miles per hour
Explanation:
if you divide 15 by 3 you get 5, therefore the student is going 5 miles per hour.
PLEASE HELP!!! (15 points)
The only group of elements that DO NOT form ions and are found as monatomic atoms in nature are the:
halogens
noble gases
alkali metals
alkaline earth metals
Answer:
noble gases is those group of elements that DO NOT form ions and are found as monatomic atoms in nature .
The only group of elements that DO NOT form ions and are found as monatomic atoms in nature are the: noble gases.
What are noble gases?The noble gases are a group of chemical elements with comparable qualities; under normal conditions, they are all odourless, colourless, monatomic gases with very minimal chemical reactivity. Historically, they were also known as inert gases and aerogens. Helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radioactive radon are the six naturally occurring noble gases (Rn).
Oganesson (Og) is a highly radioactive element created synthetically. Although the IUPAC has included oganesson since "group 18" and "noble gas" have been used interchangeably, oganesson may not be appreciably chemically noble and is projected to deviate from the norm and be reactive due to relativistic effects. Its chemistry has not yet been studied due to the single known isotope's relatively brief 0.7 ms half-life.
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When a golf club hits a 0.0459 kg ball at rest, it exerts a 2380 N force for 0.00100 s. What is the speed of the ball afterwards? (Unit = m/s)
Answer:
51.85m/s
Explanation:
Given parameters:
Mass of ball = 0.0459kg
Force = 2380N
Time taken = 0.001s
Unknown:
Speed of the ball afterwards = ?
Solution:
To solve this problem, we use Newton's second law of motion:
F = m x [tex]\frac{v - u}{t}[/tex]
F is the force
m is the mass
v is the final velocity
u is the initial velocity
t is the time taken
2380 = 0.0459 x [tex]\frac{v- 0}{0.001}[/tex]
0.0459v = 2.38
v = 51.85m/s
Answer:
2.38
Explanation:
F = dp/dt --> dp = F*dt ---> p = F*t if F is constant over time so
p = 2380N* 0.001 s = 2.38 kg-m/s
A hockey puck slides to a stop on ice. The coefficient of friction between the puck and
the ice is 0.026. What is the puck’s acceleration?
Answer:
Explanation:
The puck slides on the ice . Coefficient of sliding friction μ = .026
Limiting frictional force = μ R
R is reaction force of the surface .
R = mg
Friction force = μ mg
deceleration = μ mg / m
= μ g
= .026 x 9.8 = .2548
= 0.26 m /s².
A(n) ________________________ is a molecule that is soluble in both polar and nonpolar solvents.
Answer: ethanol which will dissolve in both water (a polar solvent) and gasoline (a non-polar solvent)
Explanation:
According to the concept of solubility, ethanol is a molecule which is soluble in both polar and non-polar solvents.
What is solubility?
Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute present in a saturated solution.
The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on temperature and pressure which is maintained.Concept of solubility is not valid for chemical reactions which are irreversible. The dependency of solubility on various factors is due to interactions between the particles, molecule or ions.
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A sample of cobalt-60 has an activity of 2000 Bq. What will the activity be after 10 years? Cobalt-60 has a half life of 5 years.
Answer:
500.3 Bq
Explanation:
From the formula;
0.693/t1/2 = 2.303/t log (Ao/A)
Where;
t1/12 = half life = 5 years
Ao = initial activity = 2000 Bq
0.693/5 = 2.303/10 log (2000/A)
0.1386= 0.2303 log (2000/A)
0.1386/0.2303 = log (2000/A)
0.6018 = log (2000/A)
(2000/A) = Antilog (0.6018)
(2000/A) = 3.9976
A = 2000/3.9976
A = 500.3 Bq
The diagram shows a tennis ball being thrown vertically into the air. When the ball just left the players hand it is at the speed of 5.0 m/s . The tenis ball has the mass of 0.058 kg. Write down the equation that links kinetic energy to mass and speed
Answer:
1. KE = ½mv²
2. The kinetic energy of the tennis ball is 0.725 J
Explanation:
The following data were obtained from the question:
Mass (m) = 0.058 kg
Velocity (v) = 5.0 m/s
Kinetic energy (KE) =.?
1. Defining an expression which relates kinetic energy, mass and speed of an object.
Kinetic energy is simply defined as the energy possess by an object in motion. Mathematically, kinetic energy can be represented as:
KE = ½mv²
Where
KE => is the kinetic energy.
m => is the mass of the object.
v => is the velocity of the object.
2. Determination of the kinetic energy of the tennis ball.
Mass (m) = 0.058 kg
Velocity (v) = 5.0 m/s
Kinetic energy (KE) =.?
KE = ½mv²
KE = ½ × 0.058 × 5²
KE = 0.029 × 25
KE = 0.725 J
Thus, the kinetic energy of the tennis ball is 0.725 J.
A 1.5 kg ball is thrown at 10 m/s. What is the ball's momentum?
Answer:
[tex]\boxed {\boxed {\sf 15 \ kg*m/s}}[/tex]
Explanation:
Momentum is the product of mass and velocity.
[tex]p=m*v[/tex]
The mass of the ball is 1.5 kilograms and the velocity is 10 meters per second.
[tex]m= 1.5 \ kg \\v= 10 \ m/s[/tex]
Substitute the values into the formula.
[tex]p= 1.5 \ kg* 10 \ m/s[/tex]
Multiply.
[tex]p=15 \ kg*m/s[/tex]
The momentum of the ball is 15 kilogram meters per second.
Answer:
15 kg m/s
Explanation:
[tex]p = mv \: = 1.5 \times 10 = 15 \: kgm {s}^{ - 1} [/tex]
Which part of this chemical process requires energy? KOH + HBr - KBr + H20 A. Forming bonds in KOH and HBr B. Breaking bonds in KBr and H2O C. Breaking bonds in KOH and HBr D. Forming bonds in KBr and H2O
The chemical process which requires energy is breaking bond in KOH and HBr. Hence, option C is correct.
What is energy?The capacity to perform work is known as energy in physics. Potential, kinematic, thermodynamic, electromagnetic, chemical, nuclear, and other types are all possible.
As energy is transferred through one body to another, there is also heat and work. As a result, heat transfer may result in thermal energy, whereas labor done may result in mechanical power.
As per the given reaction in the question,
KOH + HBr - KBr + H20
Here, in this reaction the chemical process which requires the energy is at the time of breaking of bonds in KOH and HBr at that time the energy is required.
Therefore, it is concluded that breaking bonds in KOH and HBr i.e., option C is correct.
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Velocity is speed in a given
• space
• direction
• number
• problem
Someone please help meee
Answer: Your right its ( The pressure of the substance)
Explanation: MArk me as brainlisti
Answer:
The color of the substance.
Explanation:
The color. (I think, it should be right because color shouldn't affect it.)
What is the acceleration of a 10 kg block that experiences a 50 N applied force as it slides across a
horizontal surface where the coefficient of kinetic friction between it and the surface is 0.10?
4.02 m/sec² is the acceleration of a 10 kg block that experiences a 50 N applied force as it slides across a horizontal surface.
What is force?A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.
force = 50 N - frictional force = ma
50 - 9.8 = ma
a = 40.2/10
a = 4.02 m/sec²
4.02 m/sec² is the acceleration of a 10 kg block that experiences a 50 N applied force as it slides across a horizontal surface.
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Which terms describe the purpose of antennas on devices that use radio waves?
transmit and receive
modify and amplify
amplify and receive
modify and transmit
Which terms describe the purpose of antennas on devices that use radio waves?
Answer:
transmit and receiveExplanation:
Hope it helps:)
#CarryOnLearning
Answer:
Transmit and receive (A)
Explanation:
On Edge