Answer:
Explanation:
When you put another light bulb in parallel with the other two, you are not going to get something for nothing. The current drain on the battery has to go up.
Let the lightbulbs have a a resistance of r. Two light bulbs with make the resistance go to 1/2 r. The lower the resistance, the more the current. When you put the third light bulb in, the resistance will go to 1/3 r. So the current goes up.
If you put another resistor in series with x, the resistance adds. The total series resistance is 2x. The current reading will go down. The higher the resistance the lower the current.
Which equation correctly relates mechanical energy, thermal energy, and total
energy when there is friction present in the system?
A. Ethermal
Ethermal
=
ME
B. Ethermal = Etotal - ME
C. Ethermal = ME - Etotal
D. Ethermal = Etotal + ME
Answer:
B
This is because frictional energy is similar to thermal energy in a system. Therefore the thermal energy produced is equal to
What happens as a result of changing the number of protons in an atom?
O The atom becomes an ion of the same element
O The atom becomes an isotope of the same element.
O The atom becomes a different element.
O Nothing changes.
Answer:
the atom becomes an isotope of the same element
Explanation:
isotopes are elements with the same atomic number but different mass number
a system absorbs 35J of heat and in the process it does 11J of work if the initial internal energy is 205J a,what is the final internal energy b,the system follows a different thermodynamic path to the same final state and does 15J of work, what is the heat transferred ?
Answer:
[tex]a)uf = 205 + 35 - 11 \\ = 240 - 11 \\ = 229j \\ b)q(heat \: transferd) = 229 - 205 - 11 \\ = 24 - 11 \\ = 13j \\ thank \: you[/tex]
The heat transferred is
a) u f = 205+35-11
=240-11
= 229 j
b) q (heat transferred ) = 223-205-11
= 24-11
= 13 j
What is the difference between course and process in thermodynamics?
While a thermodynamic gadget passes thru an exchange in the state, a succession of states exceeded could be termed as a course of the device or direction of an alternate country. If the route of change of kingdom is completely distinctive, route of alternate of the nation may be termed as thermodynamic manner.
The technique is described via a direction, which is the non-stop collection of consecutive states via which the machine passes, consisting of the initial nation, the intermediate states, and the very last state. The process has a course along the course.
An asset whose price would not depend upon the course taken to attain that unique price is thought to as kingdom capabilities or point features. In contrast, those capabilities which do depend upon the direction from points are referred to as course features.
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what is moment and it's type
Explanation:
The turning effect of a force is called moment .
There are two types of moment. They are:-
clockwise momentanti-clockwise momentWhat is the potential energy of a rock that weighs 10.0 kg and is sitting on top of a hill 100 meters high?l
Answer:
9800 J
Explanation:
P.E = mgh
m = massg = gravitational accelerationh = heightP.E = (10.0)(9.8)(100) = 9800 J
why cannot an athlete stop instantaneously when he reaches the end in after the race
Explanation:
because his lower body is in inertia of motion.
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fuse wire is alloy of copper and alluminium? true or false
[tex]\huge\mathfrak\green{True}[/tex]
Calculating A cyclist's speed changes from
0 m/s to 15 m/s in 10 seconds. What is the
cyclist's average acceleration?
[tex]\\ \sf\longmapsto Acceleration=\dfrac{v-u}{t}[/tex]
[tex]\\ \sf\longmapsto Acceleration=\dfrac{15-0}{10}[/tex]
[tex]\\ \sf\longmapsto Acceleration=\dfrac{15}{10}[/tex]
[tex]\\ \sf\longmapsto Acceleration=1.5m/s^2[/tex]
Average acceleration is calculated using the following formula: Average Acceleration = Change in Velocity/ Time.
Acceleration is a fundamental concept in physics that measures the rate of change of an object's velocity with respect to time.
It quantifies how quickly an object's speed or direction of motion is changing.
Acceleration = Final velocity − Initial velocity/ Time
= 15 − 0/ 10
= 15/ 10
= 1.5 m/s²
Therefore, The cyclist's average acceleration is 1.5 m/s²
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In which condition work up done opposes to frictional force
Answer:
When any work is done against friction then work done opposes to frictional force.
A car of 900 kg mass is moving at the velocity of 60 km/hr. It is
brought into rest at 50 metre distance by applying brake. Now,
calculate the force required to stop the car. [Ans: 2500 N] class 9
Answer:
2500N.
Explanation:
SEE THE IMAGE FOR SOLUTION
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Explanation:
Force = mass × acceleration
Mass = 900kg
Acceleration = velocity ÷ time
Velocity = 60km/hr = 60 × 1000 ÷ 3600
Velocity = 60000 ÷ 3600
Velocity = 16.67m/s
To get the time
Velocity = Distance ÷ time
16.67 = 50 ÷ time
Cross multiply
16.67 × time = 50
time = 50 ÷ 16.67
time = 3 seconds
Acceleration = 16.67 ÷ 3
Acceleration = 5.56m/s²
Therefore, Force = 900 × 5.56
Force = 5004 Newton
If I'm cold and want to warm up with an electric heater, which energy would I need in order to make the heater work?
a=light energy
b=electric energy
c=potential energy
d=mechanical energy
The answer would be B.) Electric Energy
Answer:
b.electric energy
we need electric energy to make the heater work.
discuss the three consequences of lack of basic services in community
We have that the Three consequences of lack of basic services in community are
-Educational Impact
-Insecurity
-Poverty
Lack of basic services in community
There are many consequences that result from the lack of basic services in a community but i shall focus on these three as they are very major impacts
-Educational Impact
Basic service like Water,Electricity ,Mobility and close Proximity to market place has a major impact on the ability of a person pursue educational attainments.we live in a modern world and without power(as) electricity we can not do much of studying in this times
-Insecurity
The Human mind is built with a default setting of Survival.Without the basic services provide persons of low moral will tend to go into illegal acts to survive as the basic needs are necessary for survival
-Poverty
For a community to grow it is necessary that the right environment is made available for growth and if these requirements are not meet in form of basic services in community the community falls under the threat of falling into poverty
In conclusion
The Three consequences of lack of basic services in community are
-Educational Impact
-Insecurity
-Poverty
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imagine that you are in the outer space where gravitational pull and friction force are non-existent. if you throw a solid ball, what do you think will happen to the ball?
Answer:
It will go on forever and won’t stop moving
Explanation:
I think it will travel forever and will be slow in the process it won’t stop is what I think
The ball is hurled upward into space, it climbs steadily until it collides with an obstruction in its path.
What is gravitational force?All mass-bearing objects are attracted by gravitational force. Because it consistently attempts to bring masses together rather than push them apart, the gravitational force is referred to as attractive.
As we know, the gravitational force is given by:
[tex]\rm F = \dfrac{Gm_1m_2}{r^2}[/tex]
Where G is the gravitational constant.
m1 and m2 are masses.
r is the distance between the masses.
As we know,
There is no gravity in space, the ball is not subject to the effects of gravity. When a ball is hurled upward into space.
It climbs steadily until it collides with an obstruction in its path.
Thus, the ball is hurled upward into space, it climbs steadily until it collides with an obstruction in its path.
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name the different varieties of electrolytes used in alkaline button cells
Answer:
Potassium hydroxide
Explanation:
it is the standard electrolyte solution for alkaline cells
91.0x26x504 ...............
Answer:
1192464
Explanation:
91.0 times 26 = 2366
2366 times 504 = 1192464
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Write the importance of international bureau of weight and measures in the country
Answer:
International Bureau of Weights and Measures (BIPM) is an international organization founded to bring about the unification of measurement systems, to establish and preserve fundamental international standards and prototypes, to verify national standards, and to determine fundamental physical constants. The bureau was established by a convention signed in Paris on May 20, 1875, effective January 1876. In 1921 a modified convention was signed. The convention provides for a General Conference that meets every four years to consider required improvements or modifications in standards. An International Committee of Weights and Measures, composed of 18 scientists elected by the conference, meets annually to monitor worldwide uniformity in units of measure.
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As a society, living sustainably means protecting Earth's natural capital and living on its natural income. True or False
Answer:
true
Explanation:
7. A train is traveling with an initial velocity of 20.1 m/sec. If the brakes can apply a maximum
acceleration of -0.0500 m/sec”, how long will it take the train to stop?
The time that takes for the train that is traveling with an initial velocity of 20.1 m/s to stop is 402 seconds.
The time that will take for the train to stop can be calculated with the following kinematic equation:
[tex] v_{f} = v_{i} + at [/tex] (1)
Where:
[tex] v_{f}[/tex]: is the final velocity = 0 (when it stops)
[tex] v_{i}[/tex]: is the intial velocity = 20.1 m/s
a: is the acceleration = -0.0500 m/s²
t: is the time =?
By solving equation (1) for t, we have:
[tex] t = \frac{v_{f} - v_{i}}{a} = \frac{0 - 20.1 m/s}{-0.0500 m/s^{2}} = 402 s [/tex]
Therefore, it will take 402 seconds for the train to stop.
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which energy is found in water store in dam?
a.kinetic energy
b.potential energy
c.chemical energy
d.both a and b
Answer:
d. both a and b
Answer:
potential energy
what is meant by an acceleration of negative 2metre per second square
means that a body is in motion, and its velocity is measured in meters per second. And, that velocity is increasing by two meters per second, every second.
........................
why is the base of the kettle made of plastic not metal?
Answer:
The metal base and the plastic housing are sealed together to complete the tea kettle body.
Explanation:
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BRAINLIEST : A car starts from rest and accelerates at a rate of 40 m/s2 over a time if 2.4 s. How fast is the car going at the end of this time interval?
Please explain
Answer:
[tex]\boxed {\boxed {\sf 96 \ m/s}}[/tex]
Explanation:
We are asked to find the final velocity of the car given the acceleration and time. We can use the following kinematics equation to calculate the final velocity.
[tex]v_f=v_i+(a \times t)[/tex]
The car starts from rest, so the initial velocity is 0 meters per second. It accelerates a rate of 40 meters per square second over a period of time of 2.4 seconds.
[tex]v_i[/tex]= 0 m/s a= 40 m/s²t= 2.4 sSubstitute the values into the formula.
[tex]v_f= 0 \ m/s + ( 40 \ m/s^2 \times2.4 \ s)[/tex]
Solve inside the parentheses.
40 m/s/s * 2.4 s = 40 m/s * 2.4=96 m/s[tex]v_f= 0 \ m/s + (96 \ m/s)[/tex]
Add.
[tex]v_f= 96 \ m/s[/tex]
The final velocity of the car is 96 meters per second.
A tractor pulls a trainer at a constant speed the tractor exerts a forward force of 1600N on the trailer. What is the force exerted by the trailer on the tractor?
Answer: 1600N backwards.
Explanation: This falls into the third law.
Read the PDF to help.
Explanation:
The answer is magnetic north pole
Which is the cause of the suns magnetic properties ?
A) upward movement or super heated gases in the convection zone
B) uneven churning of plasma
C) rapid spinning of metals in the core
D) uniform clockwise rotation of charger particles
Answer:
Q:
What characteristic is shared by sunspots, solar flares, and coronal mass ejections? Select the two correct responses.
A:
They tend to occur during active periods of the solar cycle. & They are caused by outward fluctuations of the sun's magnetic field.
Q:Drag each item to the correct location.
A: sunspot: cooler area on suns surface where the magnettic field emerges
solar flare: intense burst of radiation coming from the rapid release of magnetic energy
coronal mass ejection: large bubble of plasma from the rapid release of magnetic energy
Q: Which is the cause of the sun's magnetic properties?
A: uneven churning of plasma
Explanation:
took quick check
good luck yall
The uneven churning of plasma is the cause of the sun's magnetic properties, therefore the correct answer is option B.
What is a magnetic field?A magnetic field could be understood as an area around a magnet, magnetic material, or an electric charge in which magnetic force is exerted.
For a simple bar magnet, N-pole and S-pole are the points on a magnet that have the strongest magnetic field. The magnetic field originates from the north pole and terminates in the south pole of a magnet.
The positively charged ions and negatively charged electrons that make up the plasma of the Sun move around a lot due to its high temperatures. Multiple intricate magnetic fields that twist and turn are produced by the moving plasma. A magnetic field is produced by the extremely hot plasma that escapes from the Sun as the solar wind.
Thus, The sun's magnetic properties are caused by uneven plasma churning, so option B is the correct answer.
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A cup of sugar has a volume of 237ml . What is the mass of the cop of sugar if the density of sugar is 1.59g/ml?
Answer:
v=237ml m=? density(rho) = 1.59 g/ml
density = mass/volum
mass= (density)(volume)
m=(1.59)(237)
m=376.83g
Speed is measured by what SI units?
Answer:
Hi, There! The Correct Answer is Below!
unit of speed is the meter per second (m/s
Explanation:
Some Extra Information! :)
Speed is a measure of how fast something is travelling. The most common units of speed are metres per second (m/s), kilometres per hour (km/h) and miles per hour (mph). In a typical car journey the speed of the car will change. The distance divided by the time will calculate the average speed of the car.
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Wich of the following quantities is not a vector
Answer:
A vector has magnitude (size) and direction. The length of the line shows its magnitude and the arrowhead points in the direction. We can add two vectors by joining them head-to-tail:
Explanation:
what is 342 m/s in kilometers per hour?
Answer: 1231.2 km/h
Explanation: 342 x 3.6 ( because 1 m/s equal 3.6 km/h)
Bob the American has just driven his car across the Canadian border when he sees a
speed limit sign of 85 kilometers/hour. His speedometer only shows his speed in
miles/hour. Convert the kilometers to miles so that Bob doesn't get a speeding ticket.
(Conversions: 1 mile = 5280 ft; 1 foot = 12 in.; 1 inch = 2.54 cm
Answer:
it equals 53 miles per hour