Answer:
A
Explanation:
Voltage, V = Current, I x Resistance, R (V is directly proportional to I where R is constant of proportionality)
This means that when Voltage is increased, Current increases and when voltage is decreased, current decreases (and the inverse is true). Through all this though, resistance remains constant regardless.
Calculate the ideal mechanical advantage of a lever in which effort arm is 60 cm and load the arm is 4 cm
Question :-
Calculate the ideal Mechanical Advantage of a Lever in which Effort Arm is 60 cm and Load Arm is 4 cm .Answer :-
Mechanical Advantage is 15 .Explanation :-
As per the provided information in the given question, we have been given that the Effort Arm of liver is 60 cm . Load Arm is given 4 cm . And, we have asked to calculate the Mechanical Advantage .
For calculating the Mechanical Advantage , we will use the Formula :-
[tex] \bigstar \: \: \boxed{ \sf { \: Mechanical \: Advantage \: = \: \dfrac{Effort \: Arm}{Load \: Arm} \: }} \\ [/tex]
Therefore , by Substituting the given values in the above Formula :-
[tex] \dag \: \: \sf { \: Mechanical \: Advantage \: = \: \dfrac{Effort}{Load} \: } \\ [/tex]
[tex] \longmapsto \: \: \sf{Mechanical \: Advantage \: = \: \dfrac{ \: 60 \: }{4} } \\ [/tex]
[tex] \longmapsto \: \: \textbf {\textsf {Mechanical \: Advantage \: = \: 15 }} [/tex]
[tex] \underline {\rule {180pt} {4pt}} [/tex]
Answer:
Calculate the ideal Mechanical Advantage of a Lever in which Effort Arm is 60 cm and Load Arm is 4 cm .
Answer :-
Mechanical Advantage is 15 .
Explanation :-
As per the provided information in the given question, we have been given that the Effort Arm of liver is 60 cm . Load Arm is given 4 cm . And, we have asked to calculate the Mechanical Advantage .
For calculating the Mechanical Advantage , we will use the Formula :-
\begin{gathered} \bigstar \: \: \boxed{ \sf { \: Mechanical \: Advantage \: = \: \dfrac{Effort \: Arm}{Load \: Arm} \: }} \\ \end{gathered}
★
MechanicalAdvantage=
LoadArm
EffortArm
Therefore , by Substituting the given values in the above Formula :-
\begin{gathered} \dag \: \: \sf { \: Mechanical \: Advantage \: = \: \dfrac{Effort}{Load} \: } \\ \end{gathered}
†MechanicalAdvantage=
Load
Effort
\begin{gathered} \longmapsto \: \: \sf{Mechanical \: Advantage \: = \: \dfrac{ \: 60 \: }{4} } \\ \end{gathered}
⟼MechanicalAdvantage=
4
60
\longmapsto \: \: \textbf {\textsf {Mechanical \: Advantage \: = \: 15 }}⟼Mechanical Advantage = 15
\underline {\rule {180pt} {4pt}}
A small sphere with a charge of 4 nC is brought close to but does not touch uncharged conducting sphere A, which is grounded. The ground is disconnected, and the small sphere is removed. Sphere A is then brought close to but does not touch uncharged conducting sphere B. What is the net charge on sphere B as a result, and what is an explanation for the charge
Answer:
the answer is b that's my answer
A hummingbird beats its wings 80 times in 4 seconds. What is its period? (answer as a decimal, not a fraction.
What is the hummingbird's wingbeat frequency?
Answer:
20 per second
Explanation:
80/4
20
The hummingbird beats its wing 20 times per second!
Have an amazing day!!
PLEASE RATE AND MARK BRAINLIEST!!
electricity and magnetism
Answer:
Electricity is which is possessed by the flow of electrons.
Magnitism is the process in which the magnet attract the things which consist magnetic substance.
4. 10 pts possible
The Mofo Dam holds back a depth of 60 feet of water, but the lake
behind the dam is 100 feet wide. The Fus-Ro-Dah Dam holds back a
depth of 50 feet of water, but the lake behind the dam is 2 miles wide.
If the dams are to be constructed in the same way, which dam had to
be constructed to be strongest? (The water levels do not vary
seasonally. )
Mathematically, the Mofo dam has a depth of 60 feet of water, and Fus-Ro-Dah Dam has a depth of 50 feet of water.
Hence, the Mofo dam is constructed to be the strongest.
What dam is constructed to be strongest?Question Parameters:
The Mofo Dam holds back a depth of 60 feet of water
The Fus-Ro-Dah Dam holds back a depth of 50 feet of water,
the lake behind the dam is 2 miles wide.
Generally, The main independent factor to be considered is the depth of a dam, as its the depth of water that applies the most pressure on dams, So the only effective factor is depth.
In conclusion, the Mofo dam because it holds back a depth of 60 feet of water, While the Fus-Ro-Dah Dam holds back a depth of 50 feet of water,
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What factors do NOT affect friction between two objects? Explain how you know this.
Answer:
Friction does not depend on the amount of surface area in contact between the moving bodies or (within certain limits) on the relative speed of the bodies. It does, however, depend on the magnitude of the forces holding the bodies together.
1. A Capacitor c =5.31 nF, is made of two Parallel square Plates seperated by distance d = 5mm. Find the Area. please ans this, i will give brainliest
We know that,
[tex]\huge ➸ C = ϵ₀ \frac{A}{d} [/tex]
C⤏Capacitanceϵ₀⤏permittivity of free space constantA⤏Area of capacitor platesd ⤏distancegiven ↷
C⤏5.31 nF = 5.31 x 10^-9ϵ₀⤏8.85 x 10^-12 F/m A⤏Area of capacitor platesd ⤏5mmto find ↷
The Areasolution ↷
[tex]\begin{gathered}➸ C = ϵ₀ \frac{A}{d} \\ \end{gathered} [/tex]
[tex]\begin{gathered}➸ A = \frac{Cd}{ϵ₀} \\ \end{gathered} \\ [/tex]
[tex]\begin{gathered}➸ A = \frac{5.31 \times {10}^{ - 9} \times 5 }{8.85 \times {10}^{ - 12} } \\ \end{gathered} \\ [/tex]
[tex]➸ A =3 \times {10}^{3} {mm}^{2} [/tex]
[tex]➸ A =3 {m}^{2} [/tex]
Hence, the area is 3m²
Answer:
Explanation:
The capacitance of two parallel square plates of area A and separated by distance d is given as:
C = ε(A/d) where ε is the permittivity of the dielectric material
For air, ε = 8.854x10^(-12) F/m
Substituting into the equation:
5.31x10^(-9) = 8.854x10^(-12) * A / 5x10^(-3)
A = 3.00 m^2
Can an object have both potential and kinetic energy at the same time ?
Answer:
yes
Explanation:
An object can be elevated and moving at the same time, example: a thrown ball
Explanation:
Ofcourse! Objects can have both kinetic energy and potential energy at the same time.
An object can be elevated above the ground (have potential energy) and be moving at the same time (and also have kinetic energy).how do plants get energy
Explanation:
They get energy by taking water and minerals from the ground by root and take CO2 by leaves.They get energy by absorbing sunlight and use in the process of photosynthesisWhats the hottest planet in our solar system and why?
Please make the answer simpler thanks!
The greenhouse effect makes Venus roughly 700°F (390°C) hotter than it would be without a greenhouse effect.
From the question The hottest planet in our solar system is : Venus
Characteristics of VenusThe Venus which is the second planet from the sun, it is the hottest planet in the solar system due to the greenhouse effect which makes the Venus to be hotter that Mercury which is closest to the sun. The temperature of venus is set at approximately 700°F
Hence we can conclude that The hottest planet in our solar system is Venus
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(1) (1) The electromagnetic waves used in a microwave oven have a frequency of 2.45 10 H2)
The speed of the waves is 3.00 * 10% m/s.
Calculate the wavelength of the waves.
Answer:
3 cm
Explanation:
Using 2.45 GHz for f and using speed of light = wavelength*frequency, we find that the wavelength is about 3 cm(i rounded 2.45 GHz).
If the average mass of a scrapped car is 1,500 kg and 10 million cars are scrapped each year, what is the total mass of magnetic metals that could be recovered from scrapped cars each year?
Answer:9,750,000,000
Explanation:
975kg can be recovered so 975x10,000,000
The total mass of magnetic metals that could be recovered from scrapped cars each year will be equal to 9750,000,000.
What is an arithmetic operation?The four basic mathematical operations are the addition, subtraction, multiplication, and division of two or even more integers. Among them is the examination of integers, particularly the order of actions, which is crucial for all other mathematical topics, including algebra, data organization, and geometry.
As per the provided given data in the question,
Ten million cars are scrapped each year, then the total mass of magnetic material that could be recovered,
975kg can be recovered so,
= 975 × 10,000,000
= 9750,000,000
Therefore, it is concluded that the metal that could be recovered from scrapped cars each year will be equal to 9750,000,000.
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A car bounces up and down on its springs at 1.0 Hz with only the driver in the car. Now the driver is joined by four friends. The new frequency of oscillation when the car bounces on its springs is
The new frequency of oscillation when the car bounces on its springs is 0.447 Hz
Frequency of oscillation of spring
The frequency of oscillation of the spring is given by f = (1/2π)√(k/m) where
k = spring constant and m = mass on springNow since k is constant, and f ∝ 1/√m.
So, we have f₂/f₁ = √(m₁/m₂) where
f₁ = initial frequency of spring = 1.0 Hz, m₁ = mass of driver, f₂ = final frequency of spring and m₂ = mass on spring when driver is joined by 4 friends = 5m₁So, making f₂ subject of the formula, we have
f₂ = [√(m₁/m₂)]f₁
Substituting the values of the variables into the equation, we have
f₂ = [√(m₁/m₂)]f₁
f₂ = [√(m₁/5m₁)]1.0 Hz
f₂ = [√(1/5)]1.0 Hz
f₂ = 1.0 Hz/√5
f₂ = 1.0 Hz/2.236
f₂ = 0.447 Hz
So, the new frequency of oscillation when the car bounces on its springs is 0.447 Hz
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Which sentence describes an object that has gravitational potential energy?
Select one:
a.
A beach ball is round.
b.
A radio has batteries with stored chemical energy.
c.
A seagull sits on top of a fence post.
d.
A boat sails across the ocean.
Answer:
C. A seagull sits on top of a fence post.
8. A 55-kg skateboarder enters a ramp moving horizontally with a speed of 6.5 m/s, and leaves the ramp moving vertically with a speed of 4.1 m/s. (A) Find the height of the ramp, assuming no energy loss to frictional forces. (B) What is the skateboarder's maximum height above the bottom of the ramp?
(a) The energy lost to friction by the skateboarder is -699.6 J.
(b) The maximum height above the bottom of the ramp is 1.3 m.
Energy loss to frictionThe energy lost to friction by the skateboarder is calculated from the change in kinetic energy of the skateboarder.
ΔK.E = K.Ef - K.Ei
ΔK.E = ¹/₂m(vi² - vf²)
ΔK.E = 0.5 x 55 (4.1² - 6.5²)
ΔK.E = -699.6 J
Maximum height above the bottom of the rampThe maximum height above the bottom of the ramp is determined from conservation of energy.
mghi + ¹/₂mvi² = ¹/₂mvf² + mghf
55 x 9.8 x hi + (0.5 x 55 x 6.5²) = (0.5 x 55 x 4.1²) + (55 x 9.8 x 0)
539hi + 1161.88 = 462.28
539hi = -699.6
hi = -699.6/539
hi = -1.3 m
Thus, the maximum height above the bottom of the ramp is 1.3 m.
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someone please answer this, ill give you brainliest and your getting 100 points.
Explanation:
The inner part of earth is mainly of two parts
MantalCoreMantal and core both consists of Hot magmas .
So volcanism is required
Which of the following can be studied to find out evidence for the internal structure of the Earth?
O Mountain Building
O Seismic Waves ✓
Seismic waves due to their tendency to travel anywhere on earth ,helps to find out the internal structure of the earth by cracking up the crust and finding out the core of the planet.O Volcanism
O All of the above
A(n) 2602 kg van runs into the back of a(n)
989 kg compact car at rest. They move off
together at 7.2 m/s. Assuming no friction
with the ground, find the initial speed of the
van.
Answer in units of m/s.
Answer:
8.5 m/s
Explanation:
please see paper for the work!
Within what limits can the resistance of a circuit be varied when the rheostat resistance is 0...10 Ω? The resistance of the resistor is 20 Ω.
Answer:
passing through that circuit will be infinite.
Explanation:
When the resistance in any circuit is equal to zero then the current passing through that circuit will be infinite.
Hope it helps!!!!brainliest pls!!!!Answer:
Explanation:
When the resistance in any circuit is equal to zero then the current passing through that circuit will be infinite
Two technicians are discussing a resistance measurement between the can-h and can-l wires. Technician a says this measurement should be done with the ignition switch in the "run" position. Technician b states that a measurement of 0 ohms indicates an open in the network. Which technician is correct?
Based on the information given, the technician that's correct regarding the resistance measurement between the wires is Technician A.
Who is a technician?It should be noted that a technician simply means an individual that's in charge of looking after the technical equipment in an organization.
In this case, Technician A is correct. Technician B is incorrect as zero-ohm doesn't indicate an open circuit in the network but rather, a complete circuit.
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Yolanda is studying two waves. The first wave has an amplitude of 2 m, and the second has an amplitude of 3 m. Which statement accurately describes something that Yolanda can do as a part of her study? She can use destructive interference to generate a wave with an amplitude of 3. 1 m. She can use constructive interference to generate a wave with an amplitude of 1. 5 m. She can use destructive interference to generate a wave with an amplitude of 0 m. She can use constructive interference to generate a wave with an amplitude of 3. 5 m.
Option D is correct. She can use constructive interference to generate a wave with an amplitude of 3.5 m.
What is a wave?A wave is a phenomenon that flows across a material medium without leaving any lasting mark. Mechanical or electromagnetic waves can be used to classify them.
The wavelength of waves obtained by the interference is more than the two primary waves.
Hence Option D is correct. She can use constructive interference to generate a wave with an amplitude of 3.5 m.
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A ceiling fan rotates at the rate of 45 degree every 0.75sec. what is the angular speed of the fan in rad/sec
45° × π/180 = 0,7854 rad
ω = θ /t
ω = 0.7854 / 0.75 = 1.0472 rad/s
What force causes raindrops to fall to Earth?
A.lift
B.drag
C.gravity
D.buoyancy
Answer:
Gravity
Explanation:
Because gravity try to pull everything toward the earth center. So raindrops fall towards the ground
help, please
1.) What is the momentum of a 2,000 kg car moving at 24 m/s?
a.) 48,000 kg m/s
b.) 83.3 kg m/s
c.) 0.0012
--------------------
2.) What is the momentum of a 4.5 kg bowling ball moving at 7 m/s?
a.) 31.5 kg m/s
b.) 0.64 kg m/s
c.) 1.56 kg m/s
Answer:
A and A
Explanation:
see paper for work! :)
can someone please answer this, ill give you brainliest and your getting 100 points.
Answer:
Explanation:
The answer is the layer right under the convection current, C and D. The heat is generated by radioactive decay of heavy elements in the Earth core.
What is the heat source for convection currents in layer E?
O A
O B✓
when earth crust erupts, it forms magma which settle down in the Asthenosphere resulting in heating effect in the mantle .O C
O D