Answer:
About 2.5 hours
if displacement covered by a particle is zero then distance cover by it
Answer:
When displacement is zero, the particle may be at rest, therefore, distance travelled = 0.
Again, when displacement is zero, the final position matches with the initial position after some time, but the distance travelled will not be zero.
What is the effect of using split rings in a simple d.c generator
Answer:
Hence, The effect of using split rings in a simple DC motor is that the direction of the current flowing in the coil is reversed.
Why do white gassy stuff come out of planes?
Answer:
Jets leave white trails, or contrails, in their wakes for the same reason you can sometimes see your breath. The hot, humid exhaust from jet engines mixes with the atmosphere, which at high altitude is of much lower vapor pressure and temperature than the exhaust gas.Explanation:
Hopes this helps. Mark as brainlest plz!A hockey stick stores 4.2 J of potential energy when it is bent 3.1 cm. Treating the hockey stick as a spring, what is its spring constant
Answer:
Spring constant, k = 8740.89 N/m
Explanation:
Given the following data;
Potential energy = 4.2 J
Extension, e = 3.1 cm to meters = 3.1/100 = 0.031 m
To find the spring constant;
Mathematically, the potential energy stored in a spring is given by the formula;
[tex] P.E = \frac {1}{2}Kx^{2} [/tex]
Where;
P.E is potential energy.
K is the spring constant.
x is the extension of the spring.
Substituting into the equation, we have;
[tex] 4.2 = \frac {1}{2}*k*0.031^{2} [/tex]
Cross-multiplying, we have;
[tex] 8.4 = k*0.000961 [/tex]
[tex] k = \frac {8.4}{0.000961} [/tex]
Spring constant, k = 8740.89 N/m
Two people push a box, both in the same
direction; to the right. One person at 100N and
the other at 200N, what is the net force?
Answer:
300N
Explanation:
If both people push the box in the same direction the force applied to the box is the sum of the N from both peoplef:
100N + 200N = 300N
57. Example of the law of force and acceleration
Answer:
Newton's Second Law of Motion says that acceleration (gaining speed) happens when a force acts on a mass (object). Riding your bicycle is a good example of this law of motion at work. Your bicycle is the mass. Your leg muscles pushing pushing on the pedals of your bicycle is the force.
Explanation:
Can anybody help please?
Which of the following is true
Answer:
E
Explanation:
How much energy is needed to raise the temperature of a 2 g piece of iron from 20 degrees C to 120 degrrees C
Answer:
the amount of energy needed to raise the temperature of the iron is 90 J.
Explanation:
Given;
mass of the iron, m = 2 g
initial temperature, t₁ = 20⁰ C
final temperature, t₂ = 120⁰ C
specific heat capacity of iron, c = 0.45 J/g⁰C
The amount of energy needed to raise the temperature of the iron is calculated as follows;
H = mcΔt
H = mc(t₂ - t₁)
H = 2 x 0.45 x (120 - 20)
H = 90 J
Therefore, the amount of energy needed to raise the temperature of the iron is 90 J.
What is the magnitude of kinetic energy of a 20kg box moving at a velocity of 8m/s
A. 160 J
B. 80 J
C. 640 J
D. 1280 J
Answer:
Explanation:
[tex]KE=\frac{1}{2}mv^2[/tex] and we are solving for KE:
[tex]KE=\frac{1}{2}(20)(8)^2[/tex] which gives us that
KE = 640 J, choice C.
What is the name of the shuttle with 134 successful launches
International space station is the mission of NASA. It has launched 134 successful space missions.
What is International Space Station ?International space station is a huge place in the space but in the close orbit with all possible facilities for astronauts , scientists and others
What is NASA ?The National Aeronautics and Space Administration (NASA) is an acronym for the National Aeronautics as well as Space Administration. NASA was established as a division of the United States government on October 1, 1958. NASA is just in charge of all research and technology related to aviation and space in the United States.
To know more about NASA and International space station.
https://brainly.com/question/13033832
#SPJ2
Which situation below most likely causes a theory to change?
A new idea is hypothesized.
A scientist repeats the same procedures of an experiment.
A new technology is invented that allows for new experimentation.
A previous experiment is repeated in the same setting.
Answer:
A new technology is invented that allows for new experimentation.
Explanation:
This should be the best situation because new technology helps scientists make more accurate and precise experiments, usually giving changes to the old experiments, and the discovery of newer parameters that could not have been found in the old experiment.
So new technology, more accurate and precise experiments, more parameters and conditions have been found, giving scientists a deeper understanding of what is happening, therefore giving a theory a high probability to change.
Dr. Eriksson is working on a material called selenium. She is adding a certain number and type of atoms to the selenium, which will control conductivity. Selenium is most likely what kind of material?
Answer:
Selenium is a semiconductor
Explanation:
Selenium is a semiconductor.
Elements in the column IV and VI of the periodic table are referred to as Semiconductor.
Selenium lies in the column VI along with Tellurium
Some other elements of the column IV are silicon, germanium, and tin
Answer:
semiconductor
Explanation:
Can you please help me?
Answer:
Law of reflectionExplanation:
According to the laws of reflection,
Incident ray, reflected ray and normal lie on the same plane. Angle of reflection and angle of incidence are always equal.→ Angle of reflection : Angle of which light rays reflect off surface.
→ Angle of incidence : Angle at which light rays strikes the surface.
Answer: reflection
Explanation:
What is the mass of something that weighs 300 N on earth
Answer:
30.5810 kg
Explanation:
How much current is present if you have a line with 0.0001 C of charge running every 0.17 s?
Answer:
Q=it
where Q=Charge
i= Current
t=time
i=Q/t
= 0.0001/0.17
=5.88x10-⁴Amperes
hello random people who use this app
Answer:
Hello stranger I don't know
Explanation:
._____.
Answer:
hi stranger lol
Explanation:
1. Explain and find the volume of the round pan rounded to the nearest tenth.
2. Explain and find the volume of the rectangular pan rounded to the nearest tenth.
3. Explain how the volume of the two cake pans compare.
4. The cake density is 0.454 ounce per cubic inch and the fair price is $0.20 per ounce. What should be a fair price for each cake?
Explanation:
1. Given,
Diameter of the round pan = 8in
Radius of the round pan = 8/2 = 4in
Height of the round pan = 2in
Therefore,
Volume of the round pan
[tex]\pi {r}^{2} h[/tex]
[tex] = 3.14 \times 4in \times 4in \times 2in[/tex]
[tex] = 100.48 {in}^{3} [/tex]
When rounded to nearest tenth,
[tex] = 100.5 {in}^{3} (ans)[/tex]
2. Given,
Dimensions of the rectangular pan = 12in, 8in, 2in
Therefore,
Volume of the rectangular pan = breadth × height × length
= 12in × 8in × 2in
[tex] = 192 {in}^{3} [/tex]
When rounded to nearest tenth,
[tex] = 192.00 {in}^{3} [/tex]
[tex] = 192.0 \: or \: 192 {in}^{3} [/tex]
3. Volume of round pan
[tex] = {100.5in}^{3} [/tex]
Volume of Rectangular pan
[tex] = 192 {in}^{3} [/tex]
Hence,
Their difference of volume will be ,
[tex] = (192 - 100.5) {in}^{3} [/tex]
[tex] = 91.5 {in}^{3} (ans)[/tex]
4. In this case we must know either the mass of the cake or its volume.
Given the case that we know the mass of the cake, it would be:
price = x * 0.2
where x is the mass of the cake in ounces, that is to say if for example a cake has a mass of 10 ounces, it would be:
price = 10 * 0.2 = 2
which means that each cake costs $ 2
Given the case of the volume, we must first multiply the density by this volume in order to calculate the mass and finally the price.
price = x * 0.454 * 0.2
where x is the volume of the cake in cubic inches, if for example the volume is 10 cubic inches it would be:
price = 10 * 0.454 * 0.2 = 0.908
which means that each cake costs $ 0.9
A 10- kilogram box is at static equilibrium and the downward pull of gravity acting on the box is 98 Newton's what is the minimum force that would be required to just pick up the box ?
Answer:
Explanation:
Now
Look at it this way. This box is in equilibrium... Meaning forces around balanced out.
Now...
The Earth's pull on it is 98N
What Minimum external forces is needed to pick this up....
Now... The Minimum Force is 98N
Why?
Since This Box is under the influence of gravity...
Gravity is acting as a resistance
If you apply a force less than 98N... Let's say 50N on this box... It won't budge because your applied force is less than the resisting force on it(98N).
So We need a force ≥98. So the least force is 98N. Nothing below this will move the Box
Answer 98N.
Answer:
See image
Explanation:
Plato
A car takes 12 s to go from v=0m/s to v = 20 m/s at constant acceleration. Part A If you wish to find the distance traveled using the equation d=1/2at2, what value should you use for a?
Answer:
a = 1.67 m/s²
Explanation:
Given that,
Initial speed, u = 0
Final speed, v = 20 m/s
Time, t = 12 s
We need to find the distance traveled using the equation, d = 1/2 at².
Where
a is acceleration, a = (v-u)/t,
[tex]a=\dfrac{20-0}{12}=1.67\ m/s^2[/tex]
So,
[tex]d=\dfrac{1}{2}\times \dfrac{v-u}{t}\times t^2\\\\d=\dfrac{1}{2}\times {v-u}\times t\\\\d=\dfrac{1}{2}\times {20-0}\times 12\\\\d=10\ m[/tex]
Hence, the acceleration is 1.67 m/s² and the distance traveled is 10m.
You have set up a circuit that uses one battery to light two bulbs. One of the bulbs burns out, causing the other bulb to turn off. Explain why this happens. PLS HELP DUE IN 50 MINSSS
a rod of zinc has a mass of 5kg. in water it weighs 25 N. what is the buoyant force on it when it is submerged in water?
Answer:
If it has a mass of 5 kg its weight is 5 kg * 9.8 m/s^2 = 49 N
Weight in air = 49 N
Weight in water = 25 N
Buoyant force provided by water = 49 - 25 = 24 N
define atomic radius
Answer:
The atomic radius of a chemical element is a measure of the size of its atoms, usually the mean or typical distance from the center of the nucleus to the boundary of the surrounding shells of electrons.
Explanation:
Hope It Helps!
Which of the three methods of heat transfer is at work when an iceberg, that is floating in the ocean, is melting??
A.conduction
B.convercion
C.radiation
Answer:
As far as the iceberg is concerned - conduction is taking place because the outer layers melt and disappear in the ocean. Heat is being transferred into the iceberg.
For the ocean waters one would also have convection because as the iceberg melts the ice water that is formed would become more dense than the surrounding water and would sink into the warmer water.
An inclined plane rises to a height of 2m over a distance of 6m. Calculate:
A. The angle of the slope
Answer:
20° slope
idek i just put it into a calculator
An inclined plane rises to a height of 2m over a distance of 6m. The angle of the slope is 20°.
What is inclined plane?A plane with or without friction is inclined at an angle to the horizontal direction or +x axis.
Given is the height of 2m over a distance of 6m.
Using the trigonometric relation, we get angle θ
tanθ = perpendicular / base
tanθ = 2/6
θ = tan⁻¹ (0.333)
θ =18.42°
Thus, the slope of the inclined plane is 18.42°.
Learn more about inclined plane.
https://brainly.com/question/14983337
#SPJ2
1.A hand exerciser utilizes a coiled spring. A force of 89.0 N is required to compress the spring by 0.0191 m. Determine the force needed to compress the spring by 0.0508 m.
Answer:
236.71 N
Explanation:
Applying,
F = ke................. Equation 1
Where F = force, k = spring constant, e = extension.
make k the subject of the equation
k = F/e.............. Equation 2
From the question,
Given: F = 89 N, e = 0.0191 m
Susbtitute these values into equation 2
k = 89/0.0191
k = 4659.69 N/m
When e = 0.0508 m
The force needed is given as
F = (4659.69×0.0508)
F = 236.71 N
Answer:
Force needed to compress spring by 0.0508 m = 236.71 N (Approx.)
Explanation:
Given:
Force applied = 89 N
Length of spring compress = 0.0191 m
Find:
Force needed to compress spring by 0.0508 m
Computation:
Using Hooke's law
F = K(x)
Constant K = F / x
Constant K = 89 / 0.0191
Constant K = 4,659.68 N/m
Force needed to compress spring by 0.0508 m
So,
Force needed to compress spring by 0.0508 m = K(X)
Force needed to compress spring by 0.0508 m = (4,659.68)(0.0508)
Force needed to compress spring by 0.0508 m = 236.71 N (Approx.)
What is exothermic .Is it a reaction?
Answer:(of a reaction or process) accompanied by the release of heat.
Explanation: trust moi
Convection is the transfer of heat energy by:
A Molecular contact
B Electromagnetic waves
C Density Differences
D Movement through a vacuum
the answer is a molecular contact I am pretty sure
The distance between a charge and the source of an electric field changes from 3 mm to 6 mm.
As a result of the change, the electric potential energy of the charge is ______.
A. divided by 6
B. divided by 2
C. multiplied by 2
D. multiplied by 6
Answer:
c
Explanation:
The electric potential energy of the charge is divided by 2.
To find the electric potential energy, the values given from the source of an electric field changes from 3 mm to 6 mm.
What is electric potential energy?The electric potential energy is the energy that is needed to move a charge against the electric field.
The energy can be calculated as Work and these energy can be calculated as a whole not only the charges.
Formula for electric potential energy,
U = KQ²/r
where,
K is the constant, k = 9 × 10⁹
Substituting the values of q as the charges and then the distance can be,
U = KQ² / 3 and U = KQ² / 6
So that, the values can be divided by 2.
The unit of electric potential energy is Joule.
The distance can be from r to ∞.
Hence, Option B is the correct answer.
Learn more about electric potential energy,
https://brainly.com/question/12645463
#SPJ5
How can spectroscopy and infrared technology be useful in space?
(A)They can enhance speed by making spacecraft fuel more efficient.
(B)They can measure magnetic fields produced by astronomical bodies.
(C)They can provide an emergency escape to the astronaut from a space center.
(D)They can determine the elements that make up the surface of astronomical bodies.
Answer:
B
Explanation:
Spectroscopy measures electromagnetic radiation.
Your Answer Is...
B) They can measure magnetic fields produced by astronomical bodies.