Answer:(D)The teachers from the science department
Explanation:I took the quiz
Two long parallel wires are 4 cm apart and carry currents of 2 A and 6 A in the same direction. calculate the force between the wire perimeter of wire length
Answer:
The force per unit length of the wire is 6 x 10⁻⁵ N/m.
Explanation:
Given;
distance between the two parallel wires, r = 4 cm
current in the first wire, I₁ = 2 A
current in the second wire, I₂ = 6 A
The force per unit length of the wire is calculated as;
[tex]\frac{f}{l} = \frac{\mu I_1 I_2}{2\pi r} \\\\\frac{f}{l} =\frac{4\pi \times 10^{-7} \ \times \ 2 \ \times \ 6}{2\pi \ \times \ 0.04} \\\\\frac{f}{l} = 6 \ \times \ 10^{-5} \ N/m\\\\[/tex]
Therefore, the force per unit length of the wire is 6 x 10⁻⁵ N/m.
The greenhouse effect is
If the column of mercury in a barometer stands at 72.6 cm, what is the atmospheric pressure?
(The density of mercury is 13.6 X 103 kg/m3 and g = 9.80 m/s2)
Answer:pressure = density * acceleration due to gravity * height
H=72.6cm= 0.726m
P=0.726*13.6*10^3*9.8
P=96761.28Pa
Explanation:
The atmospheric pressure if the column of mercury in a barometer stands at 72.6 cm is 9.68 × 10⁴ Pa.
What is Pressure?The stress at a location within a confined fluid or the perpendicular force per unit area are the two definitions of pressure used in the physical sciences. A 42-pound box with an area of 84 square inches at the bottom will apply pressure on a surface equal to the force divided by the surface area.
Given:
The height in the barometer, h = 72.6 cm or 0.726 m,
The density of mercury, d = 13.6 × 10³ kg/m³,
The gravitational acceleration, g = 9.80 m/s²,
Calculate the atmospheric pressure by the following formula,
P = dgh
Here, P is the atmospheric pressure
Substitute the values,
P = 13.6 × 10³ × 9.80 × 0.726
P = 9.68 × 10⁴ Pa,
Therefore, the atmospheric pressure if the column of mercury in a barometer stands at 72.6 cm is 9.68 ×10⁴ Pa.
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1) Should I take vitamin D supplements in the winter?
1. What is the frame of reference for a plane moving at 500 km/h?
O A the clouds
O B the other planes in the sky
O C the ground
O d the passengers
The answer is C, The ground
Explanation: Gradpoint
if a object has a mass of 20g and a volume of 3.5cm3 what is the density
Answer:
5.71 g/cm^3
Explanation:
Recall that density is defined as:
density = mass/volume
therefore in our casewe have:
density = 20 g / 3.5 cm^3 = 5.71 g/cm^3
What happens when electromagnetic waves cause a disturbance in electric
and magnetic fields?
A. They cancel vibrations in electric and magnetic fields.
B. The fields line up parallel to each other.
C. The electromagnetic waves transfer energy.
D. Any particles in the fields move with them.
Answer:
c
Explanation:
just answered it
Answer:
C. The electromagnetic waves transfer energy.
Explanation:
How long does it take for an airplane to change its velocity from 140 m/s to 180 m/s if its
acceleration is 4.0 m/s?? How far does it travel during this time? (10. s, 1600 m)
Proof please
Answer:
Explanation:
a = 4ms⁻², Vf = 180 m/s & Vi = 140m/s
a = [tex]\frac{Vf-Vi}{t}[/tex]
4 = [tex]\frac{180-140}{t}[/tex]
t = 40/4
t = 10sec
To Measure Distance Use third Equation of Motion:
2aS = Vf²-Vi²
S = [tex]\frac{180*180 - 140*140}{2(4)}[/tex]
S = 12800/8 = 1600m
The period T of a pendulum of length L is measured to determine g at the surface of Earth. The equation used is T=2π√L/g. The mass of the pendulum bob is 10.0 kg, and the length of the pendulum is 1.00 m. Which of the following would contribute most to the expected error in the result?
a. 10% uncertainty in the measurement of the mass.
b. Approximating the value of t as 3.14.
c. Variation in the value of g as the pendulum bob moves along its arc.
d. Using the average period of 10 timed oscillations instead of the period of 1 timed oscillation.
d. Starting the pendulum swinging by releasing it from a horizontal position D. E.
Answer:
C: Variation in the value of g as the pendulum bob moves along its arc.
Explanation:
The formula for period of a simple pendulum is given by;
T = 2π√(L/g)
Where;
L is length
g is acceleration due to gravity
Now, from this period equation, it is clear that the only thing that can affect the period of a simple pendulum are changes to its length and acceleration due to gravity.
Looking at the options, the only one that talks about either the length or gravity as being potential causes of the error is option C
Relationship between Animal and land
Kate must do 39 days of training each year as a naval reservist. How will she serve that time?
A.
one month plus one week
B.
three weeks in the summer plus two in the winter
C.
one weekend per month plus two weeks
D.
two weeks in the spring plus three in the fall
Answer:
c
Explanation:
i did the test
If it takes you 10 seconds to move a chair 5 meters across the floor, using a force of 2 Newtons, how much power did you put out?
Answer:
1watt
Explanation:
Given parameters:
Time = 10s
Distance = 5m
Force = 2N
Unknown:
Power = ?
Solution:
Power is defined as the rate at which work is being done by a body.
Power = [tex]\frac{Work done }{time }[/tex]
Work done = Force x distance = 2 x 5 = 10J
So;
Power = [tex]\frac{10}{10}[/tex] = 1watt
Answer:
1
Explanation:
A 0.750-m-long pulse is travelling at a speed of 6.12 m/s in a spring. How long does it take the pulse to pass any point on the spring?
Answer:
0.122secsExplanation:
Speed = Distance/Time
Given
Speed = 6.12m/s
Distance = 0.750m
Substitute
Time - Distance//Speed
Time = 0.75/6.12
Time = 0.122secs
Hence it takes the pulse 0.122secs
Why is it important that an astronomer studies physics?
Answer:
Astrophysicists study the physics of the universe. “Astrophysics” is a term that is often used interchangeably with “astronomy.” Atomic, molecular, and optical physicists study atoms, simple molecules, electrons, and light, as well as the interactions among them
Explanation:
PLEASE ANSWER ASAP BEFORE MY TEACHER AND MY MOM KILLES ME PLEASE ASAP
The first person with the right answer gets to be a brainlest
In the attachment there is a density column where there is colour
Question: tell me why is the red at the bottom of the density column if it is the least dense
Answer:
the red at the bottom should not count, but the red at the top is the least dense because it floats upon the other liquids
Explanation:
hope this helps
Which property of the wave makes it-(C)
the loudest? Choose the correct answer
Low amplitude o
High amplitude o
Low frequency O
High frequency O
Answer:
low amplitude hope it will help you
The micrometer (1 μm) is often called the micron. (a) How many microns make up 3.0 km? (b) How many centimeters equal 3.0 μm? (c) How many microns are in 3.0 yd?
Answer:
3 x 10⁻⁹km
3 x 10⁻⁴cm
2.73 x 10⁶μm
Explanation:
A micron is a subunit of measurement usually for length dimensions.
1μm = 1 x 10⁻⁶m
a. How many microns make up 3km;
Now convert to meter first;
1000m = 1km
So, 3km will be made up of 3000m
So;
1 x 10⁻⁶m = 1μm
3000m = [tex]\frac{3000}{1 x 10^{-6} }[/tex] = [tex]\frac{3 x 10^{3} }{ 1 x 10^{-6} }[/tex] = 3 x 10⁻⁹km
b. How many centimeters equal 3.0 μm?
Since;
1μm = 1 x 10⁻⁶m
3μm = 3 x 1 x 10⁻⁶ = 3 x 10⁻⁶m
So;
100cm = 1m;
1m = 100cm
3 x 10⁻⁶m = 3 x 10⁻⁶ x 10² = 3 x 10⁻⁴cm
c. How many microns are in 3.0 yd?
1yd = 0.91m
3yd = 3 x 0.91 = 2.73m
So;
1 x 10⁻⁶m = 1μm
2.73m will give [tex]\frac{2.73}{1 x 10^{-6} }[/tex] = 2.73 x 10⁶μm
2. A 60 kg diver jumps off a diving board with a height of 10
meters and accelerates toward the ground. At the point shown
in the diagram, she has 1,764 Joules of gravitational energy
and 4,116 Joules of kinetic energy. What is the diver's total
mechanical energy at that point?
Answer:5,880
Explanation:Lol if I get this wrong sorry I’m trying to do this also but if you add the 1,764 joules and 4,116 joules in total if you add them all up it’ll give you 5,880 hope that helps.
What would be the electrostatic force between an electron and a neutron? Explain your answer
Some one plz help plzzzz
Answer:
8mph
Explanation:
speed=mph.
half an hourx2.
4 milesx2.
8 miles per hour.
That is the speed.
Hope this helps :D
50 POINTS WILL MARK BRAINLIEST!!!!
Choose a scientist from the timeline on the previous page. Conduct research using outside sources. Be sure to choose reliable resources such as government, scientific, and educational websites. Document all research in your own words. Be sure to properly site all resources used in your assignment.
Research and respond to the following: The person is Neil Bohr
Were there experiences in his life that led to his interest in science and the study of the atom?
Defend his work on the atom and its contribution to the modern atomic model.
Point out which contributions are present in the modern atomic model and which were eventually disproven and thus are not part of the modern model.
Neil Bohr works on atomic model and contributes semi-classical model of an atom.
What is Bohr's model of an atom?Neil Bohr put forth the Bohr model of the atom in 1915. It was created by the modification of Rutherford's atomic model.
By explaining that electrons move in fixed orbitals (shells) and not anywhere in between, Bohr theory amended the atomic structure model. He also showed that each orbit (shell) has a fixed energy. Bohr refined Rutherford's model of the atom's nucleus to include electrons and their varying energy levels.
In Bohr's theory, there is a tiny, positively charged nucleus that is surrounded by negatively charged electrons that orbit the nucleus. According to Bohr, an electron that is farther from the nucleus has more energy than one that is closer to it.
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Question 1: Bicycle pump
In this problem, you will look at the pressure developed by the piston in a
bicycle pump
Air at atmospheric pressure (1.0 x 105 Pa) is compressed at constant
temperature in a bicycle pump so that its volume is reduced by a factor of
5.
What is the pressure of the air when compressed?
Answer: The pressure of the air when compressed is [tex]5.0\times 10^5Pa[/tex]
Explanation:
Boyle's Law: This law states that pressure is inversely proportional to the volume of the gas at constant temperature and number of moles.
[tex]P\propto \frac{1}{V}[/tex] (At constant temperature and number of moles)
[tex]P_1V_1=P_2V_2[/tex]
where,
[tex]P_1[/tex] = initial pressure of gas = [tex]1.0\times 10^5Pa[/tex]
[tex]P_2[/tex] = final pressure of gas =?
[tex]V_1[/tex] = initial volume of gas = V
[tex]V_2[/tex] = final volume of gas = [tex]\frac{V}{5}[/tex]
[tex]1.0\times 10^5\times V=P_2\times \frac{V}{5}[/tex]
[tex]P_2=5.0\times 10^5Pa[/tex]
Therefore, the pressure of the air when compressed is [tex]5.0\times 10^5Pa[/tex]
PLEASE HELP ASAP
a boy swings a bucket containing 2.4 kg of water in a vertical circle of radius 0.6 m at a constant rotational rate of 1 revolution every 1.4 seconds. Find the following quantities:
the angular speed of water in rad/sec
the tangential speed of the water in meters/sec
Answer:
a) ω = 4.49 rad/s
b) v = 2.69 m/s
Explanation:
a) The angular speed can be found by using the rotational rate:
[tex] \omega = \frac{1 rev}{1.4 s}*\frac{2\pi rad}{1 rev} = 4.49 rad/s [/tex]
Hence, the angular speed is 4.49 rad/s.
b) The tangential speed is given by:
[tex] v = \omega*r = 4.49 rad/s*0.6 m = 2.69 m/s [/tex]
Therefore, the tangential speed is 2.69 m/s.
I hope it helps you!
Plzzzzz help me plzzz
The net force on the propeller of a 3.2 kg model airplane is 7.0N forward. What is the acceleration of the airplane? If it starts from rest, what is the velocity of the plane after 2.5 seconds?
Answers:
Acceleration = 2.1875 m/s^2
Velocity after 2.5 seconds = 5.46875 m/s
=======================================================
Work Shown:
Part 1
The mass is m = 3.2 and the force is F = 7.0
Apply the formula F = ma to find the acceleration to be...
F = ma
7.0 = 3.2*a
7.0/3.2 = a
2.1875 = a
a = 2.1875
The acceleration is 2.1875 m/s^2
Every second, the velocity of the plane is increasing by 2.1875 m/s.
----------------------
Part 2
We have the following variables
vi = initial velocity = 0 m/s (since it starts from rest)vf = unknown final velocity (what we're trying to figure out)t = change in time = 2.5 secondsa = acceleration = 2.1875 m/s^2Using one of the kinematics equations, we can then say,
vf = vi + a*t
vf = 0 + 2.1875*2.5
vf = 5.46875
After 2.5 seconds, the airplane is traveling 5.46875 m/s.
5.46875 m/s converts to roughly 12.2332 mph.
___have a definite shape and do not easily take the shape of their container
Answer:
Explanation:
A solid comes into your hands with a definite shape. Think of something like a rock. It is not going to be easy to change its shape. So the answer is a solid.
PLEASE ANSWER ASAP BEFORE MY TEACHER AND MY MOM KILLES ME PLEASE ASAP
The first person with the right answer gets to be a brainlest
In the attachment there is a density column where there is colour
Question: tell me why is the red at the bottom of the density column if it is the least dense
That is not meant to be red, it‘s the bottom of the beaker. The star is at the very bottom of the beaker. it’s just the base of the beaker.
The winter solstice, the shortest day of the year in the Northern hemisphere, occurs when the Earth is in which position?
Answer:
A
Explanation:
will give brainliest :)Two objects having equal masses and velocities collide with each other and come to a rest. What type of a collision is this and why?
A. Elastic collision, because internal kinetic energy is conserved
B .Inelastic collision, because internal kinetic energy is not conserved
C. Elastic collision, because internal kinetic energy is not conserved
D. Inelastic collision, because internal kinetic energy is conserved
Answer:
B. lnelastic collision, because interest kinetic energy is not conserved .
I hope it helps ❤❤
The type of collision experienced by the two objects is inelastic collision, because internal kinetic energy is not conserved.
There are two types of collisions that two objects moving directly or opposite each may experience:
Elastic collision, andInelastic collision.In elastic collision, both momentum and kinetic energy of the to objects are conserved.
In inelastic collision, only momentum is conserved while kinetic energy decreases after the collision.
Thus, we can conclude that the type of collision experienced by the two objects is inelastic collision, because internal kinetic energy is not conserved.
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explain why chlorinated swimming pool water would be a homogeneous mixture
Answer:
A chlorinated swimming pool would be a homogenous mixture because chlorine and water diffuse through each other and cannot be separated out as distinct materials. It is impossible to separate the chlorine from water as they homogenously mix and cannot be separated into their pure forms.
Explanation:
