Answer:
Claim 2
Explanation:
Australia's skin cancer rate is so high because of the climate and the weather in their area. It is also because since australia is on the bottom of the globe, the continent recieves higher UV radiation.
Thanks for the brainliest!
1.Australia has one of the highest rates of skin cancer in the world. This is due largely to our climate, the fact that many of us have fair skin that isn't really suited to such harsh conditions, our proximity to the equator (high UV levels) and our social attitudes and love for the outdoors.
2.Australia's unusually harsh sunshine results mainly from its location in the Southern Hemisphere. The elliptical orbit of the Earth places the Southern Hemisphere closer to the sun during its summer months than the Northern Hemisphere during its summer.
3.Basically, through migration, our two countries have been populated by many people with fair skin whose ancestors come from much less sunny climates. Lack of protective pigmentation leaves skin cells especially vulnerable to the DNA-damaging rays from the sun.20 Mar 2018
A girl is travelling on her bike at a speed 2.54 m/s. If the girl and her bike have a kinetic energy of 193 J, what is the combined mass of the girl and her bike? Show all your work.
Answer:
About 59.83 kg
Explanation:
The formula for kinetic energy is [tex]KE = \frac{1}{2}mV^2[/tex], where KE = Kinetic Energy in Joules (J), m = mass in kilograms (kg), and V = Velocity in meters per second (m/s).
In this problem, we are given the Kinetic Energy amount as 193 Joules and the Velocity as 2.54 m/s. Let's plug it into our equation
[tex]193 = \frac{1}{2} * 2.54^2m[/tex]Now, let's solve this equation.
Step 1: Simplify both sides of the equation.
[tex]193 = 0.5 * 2.54 * 2.54 * m[/tex] [tex]193=3.2258m[/tex]Step 2: Divide both sides by 3.2258.
[tex]193/3.2258 = 3.2258m/3.2258[/tex] m ≈ 59.830 kilogramsThe gravitational pull of the sun is greatest in our solar system because it...
A. is the brightest
B. has the greatest mass
C. has the greatest magnetism
Answer:
B. has the greatest mass
Explanation:
mass & distance affect pull
grativy affects speed & shape of orbit of the planet
quiziz
What happens to the signal inside of the cell phone? Describe at least two kinds of transformations or changes that happen to the signal inside of cell phone.
Answer:
When you're talking on a cell phone, it converts your voice into a signal that is transmitted via radio waves to the nearest cell tower. The cell tower then relays the radio wave back to the person you're speaking to, converting it first to a signal and then back to sound again.
Explanation:
no explanation for you
but the answer is in the top!
what force much be applied to stop a 1400kg car that is initially traveling at 13 m/s over a 5 second time period
Answer:
As per Provided Information
Mass of car m is 1400KgInitial velocity u is 13m/sTime taken to stop t is 5 second .Final velocity v is 0m/swe have been asked to determine the force applied to stop the car. First we will calculate the acceleration of the car.
[tex] \boxed{\bf \: a \: = \dfrac{(v - u)}{t}}[/tex]
Substituting the value and let's solve it
[tex] \longrightarrow\sf \: a \: = \dfrac{0 - 13}{5} \\ \\ \\ \longrightarrow\sf \: a \: = \cfrac{ - 13}{5} \\ \\ \\ \longrightarrow\sf \: a \: = - 2.6 \: {ms}^{ - 2} [/tex]
Now, let's calculate the force applied to stop the car .
[tex] \pink{\boxed{\bf \: F = ma}}[/tex]
Substituting the value we get
[tex] \longrightarrow \sf \: F = 1400 \times ( - 2.6) \\ \\ \\ \longrightarrow \sf \: F = - 3640 \: N[/tex]
Here , negative sign show that the " Force is acting in opposite direction of the motion"
Therefore,
3640 Newton force is required to stop the car .Sally and sam were building simple circuits in science class. they used d-cell batteries as an energy source. what kind of energy is found in batteries? question 1 options: potential light energy potential elastic energy potential chemical energy potential electrical energy
Answer:
option 3 potential chemical energy
Can someone please answer my question?
What is one way plate tectonics causes change on earth?
Answer: Tectonic processes cause the movement of land and earthquakes. This heat drives plate tectonics and parts of the rock cycle. Where humans can live can be affected by volcanic events, sea level rise, and earthquakes, all of which are related to tectonic processes.
hope it helps!:)
An electromagnetic wave moves through electric and magnetic fields. What is the relationship between the wave and the fields?
Answer:
the electric and magnetic fields that make up an electromagnetic wave are perpendicular (at right angles) to each other. Both fields are also perpendicular to the direction that the wave travels. Therefore, an electromagnetic wave is a transverse wave.
Explanation:
A student measures the voltage and current between two points in an electrical circuit. If the voltage is 220 V and the current is 1.2 A, what is the resistance, according to Ohm's law?
A. 2190
B. 2640
C. 1830
D. 0.0050
Answer:
Your answer is C
Explanation:
V=IxR
220 divide by 1.2=183.0
The answer was probably a type error so it should be C
A tow truck pulls a 3500 kg mazda car out of the mud. The car is moved 20 M in 4 seconds by the truck. What is the work done by the tow truck
Answer:
W = F * S one does not know the work performed because one does not know what force produced the resulting work. Neither can one calculate the power required because P = W / t (work / time)
One only knows the distance and the time but not the force required.
A 150- branch in a circuit must be reduced to 93 . A resistor will be added to this branch of the circuit to make this change. What value of resistance should be used and how must the resistor be connected
The value of resistance that should be used is 244.74 Ohms and the resistor must be connected in parallel.
Given the following data:
Initial resistance, R₁ = 150 Ohms.Final resistance, R₂ = 93 Ohms.What is a parallel circuit?A parallel circuit can be defined as an electrical circuit with the same potential difference (voltage) across its terminals.
In order to determine the magnitude of a resistor that should be added to this branch of the circuit, the electrical circuit would be connected as a parallel circuit.
Next, the total effective resistance of this electrical circuit is given by:
RT = (R₁ × R₂)/(R₁ - R₂)
RT = (150 × 93)/(150 - 93)
RT = 13950/57
RT = 244.74 Ohms.
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What is the weight of a box with a mass of 150 kg on Earth?
N
Use g= 9.81 m/s2 and do not include units in your answer.
Answer:
W = M g = 150 kg * 9.81 m/s^2 = 1470 N
You were only given 3 significant figures in the question.
The weight of the box is 1471.5 N.
What is weight?In science and engineering, an object's weight is defined as the force of gravity acting on the thing. Weight is sometimes described as a vector quantity in common textbooks, denoting the gravitational force acting on the item.
Given parameters:
Mass of the box, m = 150 kg.
Acceleration due to gravity, g = 9.8 m/s².
Hence, weight of the box is, W = mg = 150 kg × 9.81 m/s² =1471.5 N.
SO, weight of the box with a mass of 150 kg on Earth is 1471.5 N.
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What is the energy of a single photon of visible light with a wavelength of 500.0 nm? 1 nm=10^−9 m
1. 3.97×10^−19 J
2. 84×10^14 J
2. 02×10^18 J
4. 95×10^−19 J
Answer:
3.97×10^−19 J
From the planks equation
E=hv
V= c/ wave length
V= 3×10^8/500×10^-9
=6×10^14
E= hv
6.63×10^-34×6×10^14
= 3.97×10^−19 J
Explanation:
A pool player makes a shot on a pool table. The 0.17 kg cue ball strikes the 0.15 kg #8-ball, but it is not sunken on the table. Instead, the 8-ball bounces off a rail, and collides into the cue ball a second time. When they collide in a perfectly elastic collision, the cue ball is travelling 1.2 m/s [N10°E) and the 8-ball is travelling 0.89 m/s [W20°N]. Determine the final velocities of each ball.
Answer:
cue ball final: 0.85 m/s at N65°W
8-ball final: 1.27 m/s at N12°E
Explanation:
In a perfectly elastic collision, both momentum and energy are conserved. The momentum is the sum of products of mass and velocity. The energy is half the product of mass and the square of velocity. The difference of "particle" velocities changes sign as a consequence of the collision.
__
equations for final velocityIf we let the masses be m1 and m2, the corresponding initial velocities be v1 and v2, and the final velocities be u1 and u2, we have ...
m1·u1 +m2·u2 = m1·v1 +m2·v2 . . . . . . . conservation of momentum
u1 -u2 = v2 -v1 . . . . . . . . . . . . . . . relative velocity sign changes
This pair of linear equations can be solved for u1 and u2 in any of the usual ways to give ...
u1 = v1(m1 -m2)/(m1 +m2) + v2(2·m2)/(m1 +m2)
u2 = v2(m2 -m1)/(m1 +m2) +v1(2·m1)/(m1 +m2)
__
application to this problemUsing angle measures as clockwise from north, we are given ...
cue ball: m1 = 0.17 kg, v1 = 1.2∠10° m/s
eight ball: m2 = 0.15 kg, v2 = 0.89∠-70° m/s
A suitable calculator can find the final velocities using the above equations.
The first attachment shows the calculations using a TI-84 work-alike calculator.
cue ball final: 0.85 m/s at N65°W
8-ball final: 1.27 m/s at N12°E
The second attachment shows a vector diagram of the velocities.
Is it possible for a person to have zero mechanical energy? Why or why not?
Answer: No
Explanation:
There are a few explanations as to why. I'm not sure as to what level of an explanation you are looking for. A person's body is made of atoms, which have constant motion due to multiple processes. An atom can never ever be frozen to absolute zero motion, we can only approach that value. Therefore, we will always have kinetic energy. Another explanation is Einstein's famous formula E = mc^2. This is the rest mass energy, which all things with mass obey. There is an energy-mass equivalence.
1) anything that has mass and takes up space is called
A. Tissues
B. Mass
C. Matter
D. Atomic number
E. Weight
2) mechanical energy is
A. Found in machinery only
B. Usually measured at the atomic level
C. The sum of the chemical and thermal energy of an object
D. The sum of the kinetic and potential energy of an object
( please answer it guys i really bad at my physics TnT))
[tex]\qquad \qquad \huge \pink {\sf{☁Answer☁}} \\ \\ [/tex]
Anything that has mass and takes up space is :-[tex]\pink{\boxed{\sf{↪Option.c↩}}}[/tex]
→Matter✓
mechanical energy is[tex]\pink{\boxed{\sf{↪Option.d↩}}}[/tex]
→The sum of the kinetic and potential energy of an object✓
___________________☃️[tex]\sf{\:мѕнαcкεя\: ♪...}[/tex]
A liquid exerts the pressure of 5000 Pascal at the bottom of vessel.If the depth of liquid is 2 m,find the density of the given liquid. (g=10 metre per square)
Please help!
Answer:
250
Explanation:
pressure = depth x density of liquid x g
5000 = 2 x density x 10
density = 250
Explain How can an endergonic reaction not be endothermic?
Answer:
Answer below in pic
I hope my answer helps you.
Answer:
I totally agree with what the person above me said.It is correct
Think about the process of pulling down the spring and letting it go. For this event, list each form of energy associated with the spring and the weight. (Hint: Use the Energy Graph.)
Answer:
gravitational 2.force of gravityExplanation:
1.it ocours when an object is thrown into the sky. 2.iy ocurs when an object is falling or being pulled from the sky
Ryan holds a ball still at position A and then releases it. His friend stops the ball at position F. The image shows the path of the ball from position A to position F. Identify the kind of energy the ball has at each position. PE
KE
PE and KE
Answer:
See below
Explanation:
a PE only...the ball is not moving
b and c PE and KE
d KE only
e and f PE and KE
The energy of the ball at its highest position is potential energy.
What is law of conservation of energy ?The law of conservation of energy states that, energy can neither be created nor destroyed. Despite this, it is capable of changing its form. The sum of the energies in an isolated system is constant regardless of the types of energy present.
Here,
According to law of conservation of energy, at each position of the ball, it will have some amount of energy.
At point A
The ball is at its highest position, that means maximum height. So, the energy of the ball at that position is potential energy and it doesn't have any kinetic energy.
At points B and C
At these positions the ball is moving downwards. That means the potential energy is being converted into kinetic energy of the ball. So, it has both PE and KE.
At point D
The ball is at the lowest position, on the ground. So, the potential energy is zero. Therefore, it has the kinetic energy.
At points E and F
At these positions, the ball is moving upwards. So, it has both PE and KE.
Hence,
The energy of the ball at its highest position is potential energy.
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give any 2 evidence of the unsual expansion of water
Answer:
The anomalous expansion of water is an abnormal property of water whereby it expands instead of contracting when the temperature goes from 4o C to 0o C, and it becomes less dense.
Explanation:
The density is maximum at 4 degree centigrade and decreases below that temperature as shown in graph.
Help please I am stuck
Answer:
ADCACExplanation:
If these cranes make the work being done ten times easier, what is the mechanical advantage?
A. cannot be determined
B. ten
A student makes a voltage divider from a 45-V battery, a 475-k
resistor, and a 235-k resistor. The output is measured across the
smaller resistor. What is the voltage?
Answer:
14.9 v
Explanation:
V = IR
The voltages across the resistors will be proprtional to the values of the resistors
45 * 235 / (235 + 475) =
Lewis structure for BeCI2
Answer:
you can see it in the picture
How does earths magnetic field protect us from solar flares
Answer:
Earth's magnetic field serves to deflect most of the solar wind, whose charged particles would otherwise strip away the ozone layer that protects the Earth from harmful ultraviolet radiation.
Answer:
Earth's magnetic field serves to deflect most of the solar wind,
whose charged particles would otherwise strip away the ozone layer that
protects the Earth from harmful ultraviolet radiation.
Roughly how long does it take for the sun's light to reach Earth - 8 minutes, 8 hours or 8 days?
Answer:
8 minutes
Explanation:
Light travels at a speed of 299,792
kilometers per second; 186,287 miles
per second. It takes 499.0 second
for light to travel from the Sun to the
Earth, a distance celled 1 Astronomical
Unit.
10. Josie and Trey were working on their physics project and both built catapults. Trey's catapult shot a ball
30 meters in 10 seconds, while Josie's catapult shot a ball 45 meters in 15 seconds. Whose catapult caused
the ball to move at a faster speed?
Answer:
Josie's ball faster than T
1. A woman shuts her summer cottage up in September and returns to June. No one has entered the cottage in the meantime
Explain what she is likely to find, in terms of the second law of thermodynamics.
The hot summer cottage she left in September will still be hot when she returns in June as long as no one enters it (Isolated).
What is second law of thermodynamics?The second law of thermodynamics states that, hot things always cool unless you do something to stop them. Or the total entropy of an isolated system can never decrease.
In other words, not all heat energy can be converted into work in a cyclic process.
Therefore, we can conclude that when the woman returns, the hot summer cottage she left in September will still be hot when she returns in June as long as no one enters it (Isolated).
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Explain Resistor in parallel and series.
[tex]\sf\huge\underline\blue{Resistor:-}[/tex]
[tex]\rightarrow[/tex]A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element.
[tex]\rightarrow[/tex]Resistors reduce the current flow and lower voltage levels within circuits.
[tex]\sf\large\underline\purple{Resistors \:in\: Series:-}[/tex]
[tex]\rightarrow[/tex]A circuit is said to be connected in series when the same amount of current flows through the resistors. In such circuits, the voltage across each resistor is different.
[tex]\rightarrow[/tex]In a series connection, if any resistor is broken or a fault occurs, then the entire circuit is turned off. The construction of a series circuit is simpler compared to a parallel circuit.
[tex]\rightarrow[/tex]For the above circuit(attached image-1), the total resistance is given as:
[tex]\sf{R_{total}\: = \:R1 + R2 + ….. + Rn}[/tex]
The total resistance of the system is just the total of individual resistances.
[tex]\sf\large\underline\purple{Resistors \:in\: Parallel:-}[/tex]
[tex]\rightarrow[/tex]A circuit is said to be connected in parallel when the voltage is the same across the resistors. In such circuits, the current is branched out and recombines when branches meet at a common point.
[tex]\rightarrow[/tex]A resistor or any other component can be connected or disconnected easily without affecting other elements in a parallel circuit.
[tex]\rightarrow[/tex]The figure(attached image -2) above shows ‘n’ number of resistors connected in parallel. The following relation gives the total resistance here
[tex]\sf{\frac{1}{R_{total}}\: = \:\frac{1}{R1} + \frac{1}{R2} + ….. + \frac{1}{Rn}}[/tex]
[tex]\rightarrow[/tex]The sum of reciprocals of resistance of an individual resistor is the total reciprocal resistance of the system.
_______________________________
Hope it helps you:)
Answer:
In a series circuit, the output current of the first resistor flows into the input of the second resistor; therefore, the current is the same in each resistor. In a parallel circuit, all of the resistor leads on one side of the resistors are connected together and all the leads on the other side are connected together.
You are riding a bicycle. If you apply a forward force of 150 N, and you and the bicycle have a combined mass of 90 kg, what will be the forward acceleration of the bicycle Assume there is no friction)
A. 1.67 m/s2
B. 1.85 m/s2 m
C. 0.60 m/s2
D. 3.37 m/s2
Force(F) = 150N
Mass(m) = 90kg
To Find,Acceleration(a) = ?
We know,F= m×a
[tex]150 = 90 \times \text{a} \\ \\ \text{a} = \frac{150}{90} \\ \fbox{cancelling by 3} \\ \\ \text{ a} = \cancel \frac{150}{90} \\ \\ \text{ a} = \frac{5}{3} = 1.67 \text{m/s} {}^{2} [/tex]
[tex] \therefore \text{Option A= 1.67 m/s² is the correct answer}[/tex]
Hope this helpsAnswer:
A. 1.67 m/s2
Explanation:
F = m*a, so a = F/m = 150/90 ≈ 1.67 [tex]m/s^2[/tex]