Answer:
Earth's tilted axis causes the seasons. Throughout the year, different parts of Earth receive the Sun's most direct rays. So, when the North Pole tilts toward the Sun, it's summer in the Northern Hemisphere. And when the South Pole tilts toward the Sun, it's winter in the Northern Hemisphere.
Explanation:
It's all about Earth's tilt!
Claim:- Many people believe that Earth is closer to the Sun in the summer and that is why it is hotter. And, likewise, they think Earth is farthest from the Sun in the winter.
Although this idea makes sense, it is incorrect.
It is true that Earth's orbit is not a perfect circle. It is a bit lop-sided. During part of the year, Earth is closer to the Sun than at other times. However, in the Northern Hemisphere, we are having winter when Earth is closest to the Sun and summer when it is farthest away! Compared with how far away the Sun is, this change in Earth's distance throughout the year does not make much difference to our weather.
There is a different reason for Earth's seasons.
Reasoning:- earth's axis is an imaginary pole going right through the center of Earth from "top" to "bottom." Earth spins around this pole, making one complete turn each day. That is why we have day and night, and why every part of Earth's surface gets some of each.
Earth has seasons because its axis doesn't stand up straight.
But what caused Earth to tilt?
Long, long ago, when Earth was young, it is thought that something big hit Earth and knocked it off-kilter. So instead of rotating with its axis straight up and down, it leans over a bit.
By the way, that big thing that hit Earth is called Theia. It also blasted a big hole in the surface. That big hit sent a huge amount of dust and rubble into orbit. Most scientists think that that rubble, in time, became our Moon.
As Earth orbits the Sun, its tilted axis always points in the same direction. So, throughout the year, different parts of Earth get the Sun’s direct rays.
Sometimes it is the North Pole tilting toward the Sun (around June) and sometimes it is the South Pole tilting toward the Sun (around December).
It is summer in June in the Northern Hemisphere because the Sun's rays hit that part of Earth more directly than at any other time of the year. It is winter in December in the Northern Hemisphere, because that is when it is the South Pole's turn to be tilted toward the Sun.
Earth's lopsided orbit
Evidence- Earth's perihelion (point closest to Sun) = 91,400,000 miles from Sun
Earth's aphelion (point farthest from Sun) = 94,500,000 miles from Sun
While that is a difference of over 3 million miles, relative to the entire distance, it isn’t much.
And, believe it or not, aphelion (when Earth is farthest from the Sun) occurs in July, and perihelion (when we are closest) occurs in January. For those of us who live in the Northern Hemisphere where it's summer in July and winter in January, that seems backwards, doesn't it? That just goes to prove that Earth's distance from the Sun is not the cause of the seasons.
Answer:
Earth's tilted axis causes the seasons. Throughout the year, different parts of Earth receive the Sun's most direct rays. So, when the North Pole tilts toward the Sun, it's summer in the Northern Hemisphere. And when the South Pole tilts toward the Sun, it's winter in the Northern Hemisphere.
Hope it helps..
Which is the load
Answer:
A is the load in the diagram
Answer:
i think the answer is A
Which of these objects must have the greatest force acting on it? pls help fast
A. A baseball being dropped to the ground.
B. A baseball being tossed 1 meter into the air.
C. A paper airplane being tossed across the room.
D. A bowling ball being tossed 1 meter into the air.
Let's look at Newton's second law
F=maForce is directly proportional towards mass
If mass is more force will be more.
Between baseball and bowling ball Bowling ball has higher mass
So it would expert most force
Option D
A 3 kg toy plane is attached to a 1.8 m string that it can be whirled around in a horizontal circle above the users head. If one’s exerts a force of 10 N on the string, what speed should the plane have as it rotates
With the use of formula, The plane should rotate at the speed of 3 m/s
Circular MotionWhen a body is moving rotationally at a point, the motion is said to be a circular motion. There are two types of motion in a circle
Vertical circular motionHorizontal circular motionGiven that a 3 kg toy plane is attached to a 1.8 m string that it can be whirled around in a horizontal circle above the users head rotates.
The given parameters are:
mass m = 3 kg
Length L = 1.8 m = radius
Force F = 10 N
Velocity V = ?
If one’s exerts a force of 10 N on the string, The speed the plane should have can be calculated by using the below formula
F = M[tex]V^{2}[/tex] / r
Substitute all the parameters into the formula
10 = 3 x [tex]V^{2}[/tex] / 1.8
Cross multiply
18 = 3[tex]V^{2}[/tex]
[tex]V^{2}[/tex] = 18/3
[tex]V^{2}[/tex] = 9
V = [tex]\sqrt{9}[/tex]
V = 3 m/s
Therefore, The plane should rotate at the speed of 3 m/s
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A student repeats a reaction several times to test the effects of various
changes on the reaction rate. The data table shows the results. How does
increasing the temperature of the system change thereaction rate?
A. Increasing the temperature decreases the reaction rate.
B. Increasing the temperature increases the reaction rate.
C. More information is needed to determine what happens to the reaction rate.
D. Increasing the temperature has no effect on the reaction rate.
Answer:
The correct answer is - C. Increasing the concentration increases the reaction rate.
Explanation:
Answer:
B. Increasing the temperature increases the reaction rate.
Explanation:
The reaction time column displays how long the reaction ran for. If a reaction rate was fast then time taken for reaction to run would be slow right?
Therefore, original condition had reaction time of 10 second, but increaseing temperature lowered the time to 5 second, which must mean that reaction rate increased.
A reversible reaction is in
_______ when forward and reverse
directions of the reaction occur at the same rate so there is no overall change in the
amounts of reactants and products.
Answer:
Equilibrium
Explanation:
Equilibrium is a special situation or stage of a reactionAt equilibrium the concentrations of reactants and products are equalThe rate of change of forward and backward reaction is also sameWhich statements correctly describe the effect of distance in determining the gravitational force and the electrical
force? Check all that apply.
The gravitational force has an infinite reach.
The electrical force has an infinite reach.
The gravitational force is inversely proportional to the distance.
U The electrical force is inversely proportional to the distance.
O The gravitational force is inversely proportional to the square of the distance.
O The electrical force is inversely proportional to the square of the distance.
The statements 1,4 and 5 accurately describe the influence of distance on gravitational and electrical forces.
What is Newton's law of gravity?Newton's law of gravity states that each particle having mass in the universe attracts each other particle with a force known as the gravitational force.
Gravitational force is proportional to the product of the masses of the two bodies and inversely proportional to the square of their distance.
Decreasing the distance would increase the gravity of the planet.
The following statements accurately describe the influence of distance on gravitational and electrical forces.
1. The gravitational force has an infinite reach.
4. The gravitational force is inversely proportional to the square of the distance.
5. The electrical force is inversely proportional to the square of the distance.
Hence, options 1,4 and 5 are correct.
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A piece of polystrene has charge of -4mC(4 millicoulombs) and is placed 3m from a piece of salt with a charge of -3mc. Calculate the amount of electrostatic force which will be produced
From the calculation, we can see that the electrostatic force on the material is 1200 N.
What is electrostatic force?The electrostatic force is described by Coulumb's law. According to the law;
F = Kq1q2/r^2
Where;
q1 = -4 * 10^-3 C
q2 = -3 * 10^-3 C
r = 3 m
K = 9 * 10^9
Hence
F = 9 * 10^9 * -4 * 10^-3 C * -3 * 10^-3 C/(3)^2
F = 1200 N
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Ahmad pulls a sled across level snow by 75 N . If the sled moves 15 m , how much work does Ahmad do on the sled?
Answer:
1125 J
Explanation:
W=F x s
= 75 x 15
=1125
7
8
What happens when the thermal energy of a substance increases?
O The motion of the particles in the substance increases, and the temperature of the substance decreases.
O The motion of the particles in the substance decreases, and the temperature of the substance increases.
O Both the motion of the particles in the substance and the temperature of the substance decrease.
O Both the motion of the particles in the substance and the temperature of the substance increase
Answer:
D
Explanation:
it is because when the thermal energy increases the particles move faster and the temperature increases.
Anujan and Piragavy are pulling on either side of a box with ropes. Anujan rope pulls with a force of 35 N [35° N of W], while Piragavy pulls with a force of 11 N [41° S of E]. There is a frictional force of 6 N [s] opposing the motion. Calculate the following: The Fnet and the acceleration of the object.
The net force on the block is 20.678 N. Force is defined as the product of mass and acceleration. Its unit is Newton.
What is force?Force is defined as the push or pull applied to the body. Sometimes it is used to change the shape, size, and direction of the body.
Anujan rope pulls with a force of 35 N [35° N of W]. The force is resolved in x and y direction as;
[tex]\rm F_{1x}= 35 cos 35^0 \\\\ F_{1y}=35 sin 35^0[/tex]
Piragavy pulls with a force of 11 N [41° S of E]. The force is resolved in x and y direction as;
[tex]\rm F_{2x}= 11 cos 41^0 \\\\ F_{2y}=11 sin 41^0[/tex]
The net force on the block is;
[tex]\rm F_{net}=F_{1x}-F_{2x}\\\\\ F_{net}=35 \ cos 35^0- 11 \cos 41^0 \\\\ F_{net}=20.678 \ N[/tex]
Hence,the net force on the block is 20.678 N.
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if earth struck by a small asteroid how will the hours of daylight and night change?
Answer:
Nothing
Explanation:
We get struck by small asteroids. imperciptable changes in our degree of tilt and rate of rate of rotation
Which statement is true about this magnet and nails?
The nails are permanent magnets.
Both the magnet and the nails are permanent magnets.
Both the magnet and the nails are temporary magnets.
The nails are temporary magnets.
Answer: The nails are temporary magnets.
Explanation:
A permanent magnet is a magnet that will stay magnetized, while a temporary magnet will lose magnetism.
The magnet here is a permanent magnet, so the "Both the magnet and the nails are temporary magnets." option is incorrect.
The nail is a temporary magnet, so this narrows the options down to our answer;
The nails are temporary magnets.
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A block of mass 8 m can move without friction
on a horizontal table. This block is attached
to another block of mass 34 m by a cord that
passes over a frictionless pulley.
If the masses of the cord and the pulley
are negligible, what is the magnitude of the
acceleration of the descending block?
Answer:
Let M1 = 8 kg and M2 = 34 kg
F = M a = (M1 + M2) a
F = M2 g the net force accelerating the system
M2 g = (M1 + M2) a
a = M2 / (M1 + M2) g = 34 / (42) g = .81 g = 7.9 m/s^2
When the ultrasound beam strikes the surface at or nearly at right angles, the fraction of sound energy that is reflected (R) at the interface between two materials of acoustic impedance Z1 and Z2, respectively, is given by:
Explanation:
the expression of x= -4t+2t^2 where x is displecement?Mars had a mass of 6.38* 10^23 kg and a radius of 3,390,000meter what is the force of gravity experienced by a mars rover with a mass of 3.7 kg playing in the Martian surface
I hope its helps you . you can also write 1.44×10^3 it will be better
The magnitudes of the electric potential and of the electrostatic force depend on which factors? O
A. Mass and distance O
B. Distance and amount of charge O
C. Density and amount of charge O
D. Mass and amount of charge
Answer:
Density and amount of charge O
A projectile is shot at initial speed v0 = 8.94 m/s with angle theta = 26.5 degree as shown. It reaches the distance x = 24 m.
Find height h of the cliff, your answer should be positive.
A projectile is shot with the initial speed, it follows the motion called projectile motion. The height of the cliff is 44.91 m.
What is initial speed?The speed at the start of the motion is the initial speed.
The horizontal distance is
x = v₀ sin θ. t
Substitute 26.5 for θ, 24 for x and 8.94 m/s for x, we get the time taken to complete the journey.
t = 24/ (8.94 cos26.5) = 3 s
Maximum height reached
H = v₀²sin²θ/2g
H = (8.94)² x sin²( 26.5) /(2 x 9.8)
H =0.8118 m
The height of the cliff is obtained by the equation of motion
0.8118 - h = -1/2 gt² +v₀sinθ.t
Substitute the values, we get
h =0.8118 +1/2x9.8x (3)²
h =44.911m
Thus, the height of the cliff is 44.91 m.
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There are five appliances: an air conditioner (1000 W), a refrigerator (450 W), a washing machine (500 W), a popcorn popper (250 W), and a stereo (20 W). What are the three highest-power appliances that can be plugged into two outlets and be running at the same time? The maximum current capacity of the circuit is 15 A, and the outlets provide 120 V. (HINT: Find the current of each appliance). SHOW YOUR WORK.
The three highest-power appliances that can be plugged into two outlets and be running at the same time are air conditioner, washing machine and popcorn popper.
Current of each appliance
The current of each appliance is calculated as follows;
P = IV
I = P/V
air conditioner (1000 W), I = 1000/120 = 8.33 A
refrigerator (450 W), I = 450/120 = 3.75 A
washing machine (500 W), I = 500/120 = 4.17 A
popcorn popper (250 W), I = 20/120 = 0.17 A
The three highest-power appliances that can be plugged into two outlets;
8.33 A + 4.17 A + 0.17 A = 12.67 A, which is less than 15 A.
Thus, the three highest-power appliances that can be plugged into two outlets and be running at the same time are air conditioner, washing machine and popcorn popper.
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how does x-rays tube work
A)Compton effect
b)Photoelectric phenomenon
c) cathod and anode
Answer:
c
Explanation:
X-ray tube is an evacuated electron tube that creates X rays by accelerating electrons to a high velocity and causing them to collide with a target, the anode plate, using a high-voltage field.
calculate how much charge passes through the LED in 1 hour if the current flowing in the circuit below is 350mA
Given the the current flowing in the circuit and the elapsed time, the charge that passes through the LED is 1260 Coulombs.
What is Current?Current is simply the rate of flow of charged particles i.e electrons caused by EMF or voltage.
If a charge passes through the cross-section of a conductor in a given time, the current I is expressed as;
I = Q/t
Where Q is the charge and t is time elapsed.
Given the data in the question;
Time elapsed t = 1hr = 3600sCurrent I = 350mA = 0.35ACharge Q = ?We substitute our given values into the expression above to determine the charge.
I = Q/t
Q = I × t
Q = 0.35A × 3600s
Q = 1260C
Therefore, given the the current flowing in the circuit and the elapsed time, the charge that passes through the LED is 1260 Coulombs.
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What fitness components can impact a soccer players performance?
A) Dribbling, passing, shooting and heading
B) Physical, emotional, and cognitive factors
C) Cardiovascular, muscular strength/power, muscular endurance
D) None of the above
Answer:
C) Cardiovascular, muscular strength/power, muscular endurance
Explanation:
I did take the quiz
Answer:
C) Cardiovascular, muscular strength/power, muscular endurance
Explanation:
what particle moves from one object to another so that the object is either positively charged or negatively charged
Answer:
electrons move causing the object to be positive or negative charged
Explain the mechanism of hearing
Explanation:
The pinna collects the sound waves and conducts them to the auditory canal. Sound waves struck at the ear drum and set it into vibration. Eustachian tube equalizes the pressure on either side of the ear drum and thus allows it to vibrate freely. Ear drum transmits the vibrations to ear ossicles.
Which one is evidence that electricity is flowing?
A motor in a circuit is not moving
The battery is connected
A light bulb shines
Answer:
C. A light bulb shines
Explanation:
When electricity flows through a circuit and powers the light bulb, the light bulb would shine.
The answer isn't B because if the battery was only connected to the circuit without the circuit being turned on by the switch, electricity would not flow from the battery to the light bulb.
Consider an object of mass 2kg on a ramp with βs=0.5 and βk=0.4.
If we keep increasing the ramp angle, what is the angle() that the object starts to move downward? Give your answer in degree with 1 decimal place.
If we keep increasing the ramp angle, the angle that the object starts to move downward is 26.6°
To find the ramp angle, we need to know the forces acting on the mass on the ramp.
Forces acting on the mass on the ramp.Since the mass will just start to move, the force acting on the mass in the horizontal direction is the horizontal component of its weight in that direct. So, F = mgsinθ. where θ = ramp angle
The force acting on the mass in the vertical direction is the vertical component of its weight, F' = mgcosθ where θ = ramp angle
For the mass to just start to move downwards, the horizontal component of its weight must equal the static frictional force, f on it.
F = f
Since f = μN where
μ = coefficient of static friction = 0.5 and N = normal force = F' = mgcosθSo, F = f
mgsinθ = μmgcosθ
Dividing through by mgcosθ, we have
mgsinθ/mgcosθ = μmgcosθ/mgcosθ
sinθ/cosθ = μ
μ = tanθ
The ramp angle at which the object starts to move downwardSo, the angle at which the object starts to move downward is
θ = tan⁻¹μ
Since μ = 0.5
θ = tan⁻¹0.5
θ = 26.57°
θ ≅ 26.6°
So, the angle at which the object starts to move downward is 26.6°.
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which vector has an x component with a length of 3?
Answer:
A) b.
Explanation:
all the details are in the attached picture.
the diagram aeroplane banking to make a horizontal turn .The aeroplane is travelling at a speed of 75ms-1 and the radius of the turning circle is 800m
The centripetal acceleration of the aeroplane is determined as 7.03 m/s².
Centripetal acceleration of the aeroplaneThe centripetal acceleration of the aeroplane is calculated as follows;
ac = v²/r
where;'
v is the speed of the aeroplaner is the radius of the pathac = (75²)/(800)
ac = 7.03 m/s²
Thus, the centripetal acceleration of the aeroplane is determined as 7.03 m/s².
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A horizontal rectangular surface has dimensions 3.00 cm by 4.20 cm and is in a uniform magnetic field that is directed at an angle of 32.0 ∘ above the horizontal.
What must the magnitude of the magnetic field be to produce a flux of 3.60 × 10 −4 Wb through the surface?
Hi there!
Recall the equation for magnetic flux.
[tex]\Phi _B = \oint B \cdot dA[/tex]
We can also rewrite this as:
[tex]\Phi_B = B \cdot A = BAcos\phi[/tex]
B = Magnetic field strength (T)
A = Area of surface (m²)
φ = angle between the surface's area vector and magnetic field
Since the rectangular surface is horizontal, its perpendicular area vector points straight UP.
The magnetic field makes an angle of 32° with the surface but makes an angle complementary to this angle with the AREA VECTOR. (Think: the vertical)
Complementary of 32° ⇒ 90° - 32° = 58°
Now, we can rearrange the above equation to solve for the magnetic field.
[tex]\Phi_B = BA cos\phi \\\\B = \frac{\Phi_B}{Acos\phi}\\\\B = \frac{3.6 \times 10^{-4}}{(0.03 * 0.042)cos(58)} = \boxed{0.539 T}[/tex]
what is the relationship between Earth’s revolution and seasons
Answer:
The Earth's revolution not only affects but actually causes the temperature conditions that give us spring, summer, fall and winter seasons. Which season it is depends on whether you live in the Northern or Southern Hemisphere because the Earth's axis tilts toward one of the two as it moves around the sun.
Arrangement is used to increase the resistance in a circuit.
Resistors connected in parallel
Resistors connected in alternate
Resistors connected in series
Resistors connected in combination
Answer:
Resistors connected in series
