When the resistance is doubled, the current reduces by half.
Ohms lawOhms law states that the voltage applied to a circuit is directly proportional to the current flowing in the circuit.
V = IR
V/R = I
where;
V is emf of the batteryR is resistanceI is the currentFrom the equation above, when the resistance is doubled, the current reduces by half.
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which factor should a student include in a model to explain differences in temperature at earthed equator and earths poles?
Answer:
The uneven heating of Earth by the sun causes the climate to be warm and dry at the equator and cold and wet toward the poles. The angle of sunlight is different at different latitudes, which causes the climate to be warm at the equator and colder toward the poles.
Explanation:
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Question 20 Essay Worth 5 points)
What is the power rating of an LED light bulb if 0.50 A flow through it when connected to an 18 V battery?
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
So, the power rating of that LED light bulb is 9 Watt.
IntroductionHi ! I will answer your question. This material is about electricity where You are instructed to calculate the rated power of a lamp. Always remember, the power required by the lamp must also be at least the same as the power from the mains so that the light is not too dim or the lamp does not explode.
Formulas UsedIn this question, the formula used is the formula for calculating power, which is the product of the voltage and current flowing. It can be seen mathematically as below:
[tex] \boxed{\sf{\bold{P = V \times I}}} [/tex] Or
[tex] \boxed{\sf{\bold{P = \frac{V^2}{R}}}} [/tex]
With the following condition :
P = power that needed (Watt or W)V = voltage that used (Volt or V)I = current that flowed (Ampere or A)R = resistance in electric tools (Ohm or [tex] \sf{\varOmega} [/tex])Problem SolvingWe know that :
V = voltage that used = 18 VI = current that flowed = 0.50 AWhat was asked :
P = power that needed = ... WStep by step :
[tex] \sf{P = V \times I} [/tex]
[tex] \sf{P = 18 \times 0.5} [/tex]
[tex] \boxed{\sf{P = 9 \: Watt}} [/tex]
Conclusion :So, the power rating of that LED light bulb is 9 Watt.
A car starts from rest and speeds up to 30 m/s in a total of 6 s.
What is the acceleration?
ctive
5 m/s2
30 m/s
ker
24 m/s2
5 m/s
Answer:
5 m/s2
Explanation:
Using the equation velocity = initial velocity + (acceleration x time)
30 m/s = 0 + acceleration x 6 s
30 m/s = 6 s x acceleration
30 m/s / 6s = acceleration
acceleration = 5 m/s2
An ant climbs at a steady speed up the side of its
anthill, which is inclined 30.0" from the vertical. Sketch
a free-body diagram for the ant.
Pleas help me it urgent !?
The weight of the ant is the force that acts on the anthill in the downward direction and at angle of 30° rom the vertical.
Given the following data:
Angle of inclination = 30.0°.What is a free-body diagram?In Science, a free-body diagram can be defined as a graphical illustration which is typically used to visualize moments, tension, and applied forces that are acting on an isolated or rigid body (object) while using arrows pointing in the direction of these forces.
In this scenario, the weight of the ant is the force that acts on the anthill in the downward direction and at angle of 30° rom the vertical.
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17. Which one of the following temperatures is equal to 5°C?
OA. 278K
ОВ.0К
OC. 418
0D.465K
Answer:
A. 278K
Explanation:
I look it up it and I used a conversion chart
A very fast train starts running from the earth at a speed of 60 miles per hours . How many years will it take to reach Uranus without stopping anywhere?
Time:-
[tex]\\ \rm\hookrightarrow \dfrac{2.998\times 10^9}{96}[/tex]
[tex]\\ \rm\hookrightarrow 0.0312\times 10^9[/tex]
[tex]\\ \rm\hookrightarrow 3.12 \times 10^7hrs[/tex]
The person would have died before reaching Uranus .
Brainliest if correct Question 2 of 10
What two types of energy does a rock have as it rolls down a hill?
O A. Sound energy
B. Potential energy
c. Nuclear energy
D. Kinetic energy
E. Magnetic energy
SUBMI
Answer:
b and d
Explanation:
hii guyss how r u all many days after i came online!!
Answer:
I AM COOL DUDE HOW R U?
Explanation:
. If the electrical force of repulsion between two same amount of charges is 10 N, and
they are 30000 m apart. What is the magnitude of each charge?
Answer:I dont know
Explanation:
Because I dont know
PLEASE HELP! Will give BRAINILIEST! An amplifier can magnify the intensity of sound waves by a factor of 1,000. If a 30dB sound is fed into the amplifier, how many decibels will come out?
Answer:
30,000dB
Explanation:
30,000dB because 30 multiplied by a factor of 1000 is 30,000
Hope this helps! :)
Which object would have the highest gravitational attraction?
A. compact car
B. bicycle
C. semi truck
As a spaceship travels from Earth to the moon, which value never changes?
A. velocity
B. weight
C. acceleration
D. mass
Answer:
1. C semi truck
2. C acceleration
Explanation:
what is the meaning of energy
Answer:
Energy by definition is the property of matter that involves interactions with molecules, in order to perform an action.
Explanation:
They're many different types of energy, a few of them are...
. Thermal energy
. Solar energy
. Chemical energy
. Kinetic energy
. Potential energy
. Mechanical energy to name a few...
All of these specific energies involve the interaction of molecules which are used for different things and can be converted from one type of energy to another.
Hope this helps.
Rahim and john were two friends. once rahim went to visit the new house of john . to expel hot air out of the kitchen, john fitted an exhaust fan on his kitchen window. by seeing this , rahim said to john that an exhaust fan should place on the wall near his kitchen ceiling. otherwise, the exhaust fan will not expel the hot air more effectively.
(a). is rahim right or wrong ? why?
(b). how a vantilator works in circulating fresh air in the room?
Answer soon as possible
Answer:
i don't know how to explain it but I think it's just the way you do it by yourself
Students place the end of a wooden board on some books so that the board can be used as an inclined plane. The
students release a ball at the top of the inclined plane and measure the time for the ball to reach the bottom of the
ramp. The students perform three trials. The students then cover the board with a cloth and follow the same
procedure as before. The data are graphed below.
Part A
Describe two forces acting on the ball during the investigation.
Part B
Explain why the ball takes more time to roll down the ramp with a cloth surface.
Part C
Explain why the students repeated the investigation three times.
Part D
Explain how the ball's energy changes as the ball moves down the ramp.
Friction is the force that opposes motion.
What is friction?The term friction refers to the force that hinders the movement of a surface over another. The frictional force depends on the nature of the surfaces in contact.
1) The two forces acting on the ball during the frictional force are the forward force and the frictional force.
2) The ball takes more time to roll down the incline in the presence of the cloth because of the increase in friction of the surface.
3) The students repeated the investigation there times in order to ensure accuracy of the results.
4) The energy of the ball changes from potential energy at the top of the ramp to kinetic energy as it rolls down the ramp.
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what is the valency of Sulphur!!
Explanation:
The sulphur atom has 6 electrons in the outermost shell, and its valency could be 6. But it is easier for sulphur to gain two electrons instead of losing six electrons. Hence, its valency is determined by subtracting six electrons from the octet and this gives a valency of two for sulphur.
a propeller has a diameter of 76 inches. what is the area covered by the propeller after 3 complete turns?
Answer:
looking at aircraft of a similar size and performance, the propeller diameter is generally in the region of 1.4 – 1.8 m (4.6 ft to 6.0 ft).
Explanation:
A locomotive is pulling 9 freight cars, each of which is loaded with the same weight. The mass of each loaded car is 37,000 kg, and we can neglect friction on these 9 cars. If the train is accelerating forward at 0.81 m/s^2 on a level track, what is the tension in the coupling between the second and third cars?
The tension in the coupling between the second and third cars is 269,730 N.
Tension in the coupling between the carsSince the weight of each car is the same, the applied force on each will be the same and the tension on the coupling between the cars will be the same.
T = F = ma
T = 9(37,000 x 0.81)
T = 269,730 N
Thus, the tension in the coupling between the second and third cars is 269,730 N.
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You are riding your bike at 5 mis. In order to avoid hitting a child that has
run into the street, you slam on your brakes and slow to a stop. It takes you
1.5 seconds to fully stop. What was your acceleration?
You are riding your bike at 5 m/s. In order to avoid hitting a child that has run into the street, you slam on your brakes and slow to a stop. It takes you 1.5 seconds to fully stop. Acceleration will be 3.33 [tex]m/s^{2}[/tex]
The branch of physics that defines motion with respect to space and time, ignoring the cause of that motion, is known as kinematics. Kinematics equations are a set of equations that can derive an unknown aspect of a body’s motion if the other aspects are provided.
given
speed = 5 m/s
time = 1.5 seconds
using
v = u + at
0 = 5 + a ( 1.5 )
a = -5 / 1.5
= 3.33 [tex]m/s^{2}[/tex]
Acceleration will be 3.33 [tex]m/s^{2}[/tex]
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7th grade science i mark as brainliest
mary jogs for 15 min at 240 m/min, walks the next 10 min at 90 m/min
Answer: 4500 m
Explanation:
[tex]15 min. * \frac{240 m}{min.} = 3600 m[/tex]
[tex]10 min. * \frac{90m }{min.} = 900 m[/tex]
[tex]3600m +900m = 4500m[/tex]
What is the most important reason that astronomers have learned more about our planetary system in the last 30-40 years than all of history before then.
What can be proved from the given figure?
It prove that liquid pressure increases with depth
PLEASE HELP! WILL GIVE BRAINLIEST! A jet travels through air at 464.1 m/s. If the air has a temperature of 0 degrees C, at what Mach number is the jet flying?
Answer:
Mach 1.4
Explanation:
V = 331.5 + 0.6*0 = 331.5 m/s
464.1/331.5 = Mach 1.4
who is a meterologist?
Answer:
A meteorologist is a scientist who studies weather Explanation:
A meterologist is a scientist who studies the weather condition of an environment.
WHO IS A METEROLOGIST?A meteorologist is a scientist that specifies in the act of understanding and forecasting the atmospheric condition or weather of the Earth surface.
The branch of science that studies weather is called meteorology and a meterologist uses several techniques and tools to explain weather.
Therefore, a meterologist is a scientist who studies the weather condition of an environment.
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A hiker travels 5.0 km north and then 2.5 km west What is the resultant displacement vector?
Answer: The resultant displacement vector is 5.6km
The resultant displacement vector of the hiker is equal to 5.6 km.
What is displacement?The distance can be described as the total length traveled by an object and is a scalar quantity with only magnitude. The distance should be always positive.
The displacement of an object can be described as the shortest length between two points. The displacement can be considered as a vector quantity with direction & magnitude. The displacement can be +ve, -ve, or zero and can be changed with time.
Given, a hiker moves 5.0 km along AB in the North and then 2.5 km west along BC.
The length (AC) is the resultant displacement that can be calculated by using Pythagoras' theorem:
AC² = AB² + BC²
AC² = (5.0)² + (2.5)²
AC² = 25 + 6.25
AC = 5.59 km ≈ 5.6 km
Therefore, the displacement of the hiker is 5.6 Km.
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A box of spherical jawbreaker candies is 23 g and its volume is 32.3 cm3. If the average mass of a single jawbreaker is 0.94 g, what is the radius of a single jawbreaker
The radius of each jawbreaker is approximately 0.68 cm.
Volume of a sphere;v = 4 /3 πr³where
r = radius
Therefore,
23 g = 32.3 cm³
0.94 g = ?
cross multiply
volume of a single jawbreaker = 32.3 × 0.94 / 23 = 30.362 / 23 = 1.32 cm³
Therefore,
volume of each jawbreaker = 4 /3 πr³
1.32 = 4 / 3 × 3.14 × r³
r³ = 1.32 /4.18666666667
r³ = 0.31533683707
r = ∛0.31533683707
r = 0.680651651 = 0.68
Therefore, the radius of each jawbreaker is approximately 0.68 cm.
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If the population of frogs decreased, then what would increase?
A
foxes
B
hawks
C
caterpillars
Answer:
my answer is letter b ithink
What type of wave squeezes together and
pulls apart?
A. longitudinal wave
B. transverse waves
C. seismic waves
D. electromagnetic waves
Answer:
B, longitudinal moves up and down, seismic also,l
You are using a wrench to loosen a bolt. The wrench has a 0.330 m long handle and you apply 205 Newtons of force perpendicular to the end of the handle. How much torque have you applied?
Answer: Try and subtract
Explanation:
what do you mean by escape speed at a place?
In celestial mechanics, escape velocity or escape speed is the minimum speed needed for a free, non-propelled object to escape from the gravitational influence of a primary body, thus reaching an infinite distance from it.
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