An uncharged spherical conductor hangs by an insulating thread. You bring a negatively charged rod near
from the left side. The net charge on the hanging conductor’s left side is (choose one):
a. Positive
b. Negative
c. Neutral
Answer:
Positive
This type of charging is called charging by induction In this the uncharged body gets the opposite type of charge.when a negatively charged rod is bring near uncharged spherical conductor it attracts positive charge and repels negative charges
so In left side all positive charges appears and in right side all negetive
Types of methods of charging
Charging by contact charging by rubbing charging by induction.how does radiation differ from conduction and convection for the transference of heat
?
Answer:
look below! :)
Explanation:
Radiation transfers heat through electromagnetic waves
conduction transfers heat through direct contact of things
convection transfers heat through movement of air or water
A football is kicked with an initial velocity of 10 m/s at an angle of 25°. If it hits the ground 1.5s later, how many meters does it travel?
Answer:
i am pretty sure its 15 m
Explanation:
10 m/s
1.5 seconds
25 angle
10m/1.5s
10x1.5=15
A solenoid is configured to produce a magnetic field of 0.027T at its center. it has radius 1.4 cm and length 40cm and the wire can carry a maximum length of 12.0A. What is the total length required
The total length of the wire required is 63 m.
What is current?The current is the stream of charges which flow inside the conductors when connected across the end of voltage.
Given is a solenoid is configured to produce a magnetic field of 0.027T at its center. it has radius 1.4 cm and length 40cm and the wire can carry a maximum current of 12.0 A.
Radius, r = 1.4cm = 0.014 m
Length l = 40 cm = 0.4 m
If the current is I, then the magnetic field in solenoid is given by
B = μ₀ n I
By substituting the values, we get
0.027 = 4π x 10⁻⁷ x n x 0.4
n = 1792 turns/unit length
Total length of wire = circumference x Turns
L = 2πr x N
where N = nl
Plug the values, we get
L = 2π x 0.014 x1792 x 0.4
L = 63 m
Thus, the total length of the wire is 63 m.
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What is the purpose of the scapula to move during arm elevation?
The purpose of the scapula to move during arm elevation is increase the range of elevation of the arm.
What is the importance of movement of the scapula during arm elevation?The scapula is an important bone which is found in the shoulder and back region of the body.
The scapula enables and increases the range of motion of the arm with its motions.
During arm elevation, the scapula undergoes an upward rotational motion.
Therefore, the purpose of the scapula to move during arm elevation is increase the range of elevation of the arm.
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A football is kicked with an initial velocity of 10 m/s at an angle of 25 degrees. If it hits the ground 1.5s later, how many meters does it travel?
The distance travelled by the ball, given the data is 7.82 m
Data obtained from the questionInitial velocity (u) = 10 m/sAngle of projection (θ) = 25 degrees Time of flight (T) = 1.5 sAcceleration due to gravity (g) = 9.8 m/s²Range (R) = ?How to determine the rangeThe range (i.e distance) travelled by the ball can be obtained as illustrated below:
R = u²Sine(2θ) / g
R = 10² × Sine (2×25) / 9.8
R = 10² × Sine 50 / 9.8
R = 7.82 m
Thus, the distance travelled by the ball is 7.82 m
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A train is traveling west at a velocity of 25 m/s. Another train is traveling east directly toward the west-bound train at a velocity of 15 m/s. The west-bound train blows its whistle with a frequency of 600 Hz when the two trains are 1000 m apart and then blows its whistle again 10 seconds later. For passengers on the east-bound train, how will the perceived frequency of the first whistle compare with the perceived frequency of the second whistle
(a) The frequency observed by the passenger on the east-bound train when they are 1000 m apart is 675.5 Hz.
(b) After 10 seconds, the frequency observed by the passenger on the east-bound train will be greater than the frequency observed when they are 1000 m apart.
Observed frequency
The frequency observed by the passenger on east-bound train is calculated by applying Doppler shift formula.
[tex]f = f_0(\frac{v \pm v_0}{v\pm v_s} )[/tex]
where;
f is observed frequencyf₀ is original frequency or source frequencyv is speed of soundv₀ is speed of observer (positive when moving towards source)vs is source frequency (negative when moving towards observer)when the two trains are 1000 m apart[tex]f = 600(\frac{343 +15}{343-25} )\\\\f = 675.5 \ Hz[/tex]
The frequency observed by the passenger increases with decrease in distance between the two trains.
Thus, after 10 seconds, the frequency observed by the passenger on the east-bound train will be greater than the frequency observed when they are 1000 m apart.
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What would be the effect of adding a proton to a nucleus?
A. It would increase the strong nuclear force and increase the
electrostatic force.
B. It would decrease the strong nuclear force and decrease the
electrostatic force.
C. It would increase the strong nuclear force and decrease the
electrostatic force.
D. It would decrease the strong nuclear force and increase the
electrostatic force.
Answer:
A
Explanation:
The electrostatic force and strong nuclear force are opposite forces. The electrostatic force causes the repulsion beteween the positively charged protons in the nucleus but the strong force keeps the nucleus glued together but overcoming the electrostatic force. They would both increase upon the addition of a proton or radioactivity will result.
You are on a boat in a fog and know there are cliffs ahead of you somewhere, but you cannot see them. you use your fog horn to send out a blast of sound (assume the temperature of the air is 20 oc) and the time it takes for the sound to return to you is 20.0 s. how far away are the cliffs (in metric units)
The distance of the cliff from where you are is determined as 3,430 m.
Distance of the cliffApply the formula for echo.
v = 2d/t
where;
v is speed of sound at 20 ⁰C = 343 m/sd is distance = ?t is time = 20 s2d = vt
d = vt/2
d = (343 x 20)/2
d = 3430 m
Thus, the distance of the cliff from where you are is determined as 3,430 m.
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Siobhan wants to measure the mass of the bag of flour.what should she do?
Answer:
Weight it in beam balance or any other weight mesuring device
A spring with constant 185 N/m is compressed 1.38 m with a mass of 0.53 kg. How fast is it going 2.5 m above the ground?
The velocity 2.5 m above the ground will be 49.07 m/sec.
What is spring force?
The force required to extend or compress a spring by some distance scales linearly concerning that distance is known as the spring force. Its formula is;
F = kx
The formula for force is;
F=ma
Equating both the equation;
ma = kx
a=kx/m
a=( 185 N/m × 1.38 m) / 0.53
a = 481.6 m/s²
The speed is found by Newton's third equation of motion;
v²=u²+2as
v²=0+2as
v²=2 × 481.6 m/s² × 2.5 m
v = 49.07 m/sec
Hence the velocity 2.5 m above the ground will be 49.07 m/sec.
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Two skaters, a man and a woman, are standing on ice. Neglect any friction between the skate blades and the ice. The mass of the man is 89 kg, and the mass of the woman is 59 kg. The woman pushes on the man with a force of 46 N due east. Determine the acceleration (magnitude and direction) of (a) the man and (b) the woman
Answer:
Acceleration of this man: approximately [tex]0.52\; {\rm m\cdot s^{-1}}[/tex] due east.
Accelerate of this woman: approximately [tex]0.78\; {\rm m \cdot s^{-1}}[/tex] due west.
Explanation:
The question implies that the net force on the man is [tex]F = 46\; {\rm N}[/tex] due east. The mass of the man is [tex]m = 89 \; {\rm kg}[/tex]. The acceleration of the man would be:
[tex]\begin{aligned} a &= \frac{F}{m} \\ &= \frac{46\; {\rm N}}{89\; {\rm kg}} && \genfrac{}{}{0}{}{(\text{due east})}{} \\ &\approx 0.52\; {\rm m\cdot s^{-2}} && (\text{due east})\end{aligned}[/tex].
In other words, the acceleration of this man would be approximately [tex]0.52\; {\rm m \cdot s^{-2}}[/tex] due east (same direction as the net force.)
By Newton's Laws of Motion, for every force there is a reaction force that is equal in magnitude but opposite in direction.
The woman in this question is applying a due east [tex]46\; {\rm N}[/tex] force on the man. Thus, this woman would experience a reaction force of the same magnitude ([tex]46\; {\rm N}\![/tex]) and opposite direction (due west) from the man. Under assumptions of the question, the net force on the woman would be [tex]\! 46\; {\rm N}[/tex] due west.
The acceleration of this [tex]m = 59\; {\rm kg}[/tex] woman would be:
[tex]\begin{aligned} a &= \frac{F}{m} \\ &= \frac{46\; {\rm N}}{59\; {\rm kg}} && \genfrac{}{}{0}{}{(\text{due west})}{} \\ &\approx 0.78\; {\rm m\cdot s^{-2}} && (\text{due west})\end{aligned}[/tex].
Which would most likely cause a decrease in the rate of energy production in a fusion nuclear reactor? a drop in the temperature in the reactor an increase in the number of neutrons in the reactor an increase in the amount of nuclear fuel used in the reactor a drop in the number of reactions that involve the splitting of nuclei
A drop in temperature would most likely result in a decline in the rate of energy production in a fusion nuclear reactor.
What is nuclear power?The utilization of nuclear reactions to generate energy is known as nuclear power.
Nuclear power facilities produce the great bulk of the electricity generated by nuclear fission of uranium and plutonium.
The environment should be hot enough for the deuterium and tritium ions' kinetic energies to be sufficient to break through the Coulomb barrier and fuse together.
Therefore, a decrease in temperature would most likely cause a decrease in the rate of energy production in a fusion nuclear reactor.
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The average distance from Earth to the Moon is 384,000 km. How many days would it take, traveling at 800 km/h (the typical speed of a jet), to reach the Moon
Answer:
20 days, 480 hours
Which of the following describes an action-reaction pair?
A. You push on a wall, and the wall pushes back on you.
O B. You sit on a chair, and the chair is pulled down by gravity.
O C. A cup pushes down on a table, and the table pushes down on the
ground.
D. The Moon's gravity pulls on Earth, and your gravity pulls on the
Moon.
Answer:
A) only the wall is involved for both forces (action-reaction)
a traffic light at an intersection is hanging from two wires of equal length making angles of 10 degrees below the horitzontal. The traffic light weights 2500 N. What are the tensions in the wires
The tensions in the wires at the given angle of inclination is determined as 434.1 N.
Tension on the wire
The tension in the wires is calculated as follows;
T = Wsinθ
where;
T is tension in each wireW is weight of the traffic lightT = 2500 x sin(10)
T = 434.1 N
Thus, the tensions in the wires at the given angle of inclination is determined as 434.1 N.
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A point located on the second hand of a large clock has a radial acceleration of 0. 1cm/s2. How far is the point from the axis of rotation of the second hand?
The distance of the point from the axis of rotation of the second hand is 9.1 m.
Radius of the clockThe point from the axis of rotation of the second hand is the radius of the rotation of the clock.
a = v²/r
v² = ar
v = √ar
V = 2πr/T
√ar = 2πr/T
ar = 4π²r²/T²
a = 4π²r/T²
r = aT²/4π²
r = (0.1 x 60²)/(4π²)
r = 9.1 m
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NEED ANSWER ASAP!!!! Tony pulls a luggage cart at an angle of 30° to the horizontal. The luggage cart has a mass of 35 kg, and he pulls with a force of 75 N.
a. What is the normal force on the luggage cart?
b. What force would Tony need to apply at a 30° angle to pull the luggage cart completely off the ground?
c. How does your answer in part (b) change as the angle increases?
a)The normal force on the luggage cart will be 305.85 N
b)The force would Tony needs to apply at a 30° angle to pull the luggage cart willl be 375 N.
What is the friction force?It is a type of opposition force acting on the surface of the body that tries to oppose the motion of the body. its unit is Newton (N).
it is defined as the product of the coefficient of friction and normal reaction.
On resolving the given force and acceleration. Mathematically aion in the different components and balancing the equation gets.Components in the x-direction.
Given data;
The angle of pulling with horizontal. = 30°
Mass of luggage cart=35 kg
Pulling force= 75 N
The force in the y-direction;
N+Fsin30° = mg
N+75 sin 30° = 35 × 9.81
N=305.85 N
The force would Tony need to apply at a 30° angle to pull the luggage cart completely off the ground;
N-mg=Fsin30
Fsin30=75 sin 30
Fsin30=375 N
Hence the normal force on the luggage cart and force would Tony need to apply at a 30° angle to pull the luggage cart willl be 305.85 N and 375 N.
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What words experiences in Niels Bohrs life That led to his interest in science and the study of the atom
The words experiences in Niels Bohr's life that led to his interest in science and the study of the atom is he disliked writing essays and talented in mathematics.
What is atom?Atom is the smallest unit of the element. Different elements have different size atoms and same element have same size atoms.
Neil Bohr loved talking, he had a disliking of writing essays. He was talented in mathematics. He then attracted to the sciences. Physics interested Neil and when he was a teenager, he started correcting the mistakes in his school's textbooks.
The contributions are present in the modern atomic model. They are: All matter consists of atoms. Atoms of the same element are the same in size and atoms of different elements are different. Atoms combine in whole-number ratios to form compounds.
Thus, Physics interested him to further study for atom.
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True or false? the electric field produced by a uniform, infinite plane of charge does not depend on the distance from the plane.
True, the electric field produced by a uniform, infinite plane of charge does not depend on the distance from the plane.
What is electric field?Electric field is the region of space at which electric force is felt.
E = kq/r²
where;
r is the distance of the chargeat infinite plane, r → ∞, and E = 0
Thus, the electric field produced by a uniform, infinite plane of charge does not depend on the distance from the plane.
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briefly describe how the micrometre screw gauge is used
Answer:
the micrometre screw gauge is used for making precise linear measurements (e.g to measure diameter of a wire)
Propane (c3h8), a common fuel, reacts with oxygen to form carbon dioxide and water according to the equation below. c3h8 5o2 → 3co2 4h2o how many grams of oxygen are required to produce 37.15 g co2? 37.15 g co2 = g o2
The amount of oxygen will be 22.29 gm required to produce 37.15 g co₂.
What is a chemical reaction?One or more compounds, known as reactants, are transformed into one or more distinct substances, known as products. Such a process is known as a chemical reaction.
Given reaction;
[tex]\rm C_3h_8 +5O_2 }\rightarrow 3CO_2 +4H_2O[/tex]
The quantity of oxygen is x and the quantity of carbon dioxide is y then the ratio of their composition is found as;
5x=3y
5x=37.15
x=3×37.15/5
x=22.29 gm
Hence the amount of oxygen will be 22.29 gm
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Answer: 45.02 (g O2)
Explanation: The person above me is wrong...but this is the right answer on edge! Ik cuz i just did this assignment and got 100% Hope this helps :D
What are the characteristics of the image formed by the object?
Answer:
The image is formed by a convex lens with the object at 2F.
Image will be of same size as the objectImage will be real and upside down.Sample Response: The image created by the object is located on 2F behind the lens, real, inverted, and the same size as the actual object.
Explanation: EDGE.
the range of diameters and luminosities displayed by elliptical galaxies is ____.
The range of diameters and luminosities displayed by elliptical galaxies is 3000 to 700,000 light years and Mv-23 down to Mv- -16 mag respectively
What are elliptical galaxies?Elliptical galaxies are type of galaxies with a smooth ellipsoidal shape.
They are the most abundant galaxies in the universe.
Their diameter ranges from 3, 000 to 700, 000 light years.
Their luminosity ranges from Mv-23 down to Mv- -16 mag
Therefore, the range of diameters and luminosities displayed by elliptical galaxies is 3000 to 700,000 light years and Mv-23 down to Mv- -16 mag respectively.
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a balloon of total mass 2200 kg hovers stationary at a height of several meters above the ground. a mass of 200 kg is released from rest from the balloon.calculate the acceleration of the balloon as it starts to rise.
Answer:
1 m/s²
Explanation:
added in the picture
red dwarf stars (stars between 0.08 and 0.5 solar masses) evolve very differently than other stars as they age because ____.
Red dwarf stars evolve very differently than other stars as they age because their interiors are well mixed, through strong convection.
What are red dwarf stars?
Red dwarf stars are the smallest and coolest kind of stars on the main sequence.
Red dwarf stars (stars between 0.08 and 0.5 solar masses) evolve very differently than other stars as they age because their interiors are well mixed, through strong convection.
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Please, please help i will give 50 points to someone who will help me get this correct!!!!!
can you write the question because i cant see it
Can anyone please answer this cq..
Answer the following questions clearly and thoughtfully.
1. If you were governor of your state...
A. What are two things you would do to protect wetlands? (2 points)
B. What are three important things wetlands can do that make them worth
protecting? (3 points)
I need help
A) Formulate policies to protect wetlands and ensure that the policies are enforced.
B) Wetlands hold important biodiversity. They are a source of foods, medicines, and raw materials. They help with stabilizing the climate.
WetlandsAs a governor of my state, the two most important steps to protect wetlands include:
Formulate relevant policies through consultation with different stakeholdersEnsure that the policies are enforced. Wetlands are homes to many important plant, animal, and microbe species. Some of these species serve as foods, raw materials, and medicines for humans and their livestock.Wetlands help sequestrate carbon dioxide and as such, help with the regulation of climate.More on wetlands can be found here: https://brainly.com/question/11438518
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To protect the wetlands, I will ensure a strict enforcement of all existing state laws on the conservation of wetlands.
What are wetlands?The wetlands are those areas that consists of marshes and swamps. They are of great important to the ecosystem and biodiversity.
a) The two things that I will do to protect wetlands are;
I will ensure that the areas that drain into the wetlands are kept clean from contaminants such as pesticides and other chemicals.I will ensure a strict enforcement of all existing state laws on the conservation of wetlands.b) Wetlands are very important because;
They are very important in erosion controlThey help to preserve biodiversityThey are important components of the biogeochemical cycles of water, nitrogen and sulfur.Learn more about wetlands:https://brainly.com/question/11438518
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Because of wave refraction, erosion along an irregular coastline is:
Because of wave refraction, erosion along an irregular coastline is greatest in headlands.
What is Refraction?This is referred to as the bending of light as it passes from one medium to another with its speed being changed.
Refraction causes erosion along an irregular coastline to be greatest in headlands which is the area of land projected out toward the sea.
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