uses and effects of UV rays? ​

Answers

Answer 1

Answer:

The above pic may help you :)

Uses And Effects Of UV Rays?

Related Questions

what do the terrestrial planets and jovian planets have in common

Answers

Similarities:

They were all formed at roughly the same time 4.6 billion years ago. Both Jovian and Terrestrial planets orbit the sun.Both groups have magnetic fields.

Hope this helps u...

Organizing data into a graph is an
example of
a. collecting data.
b. forming a hypothesis.
c. asking a question.
d. analyzing data.

Answers

i think it’s A. collecting data

A 0.5 kg yellow bouncy ball rolls to the right at a speed of 8 m/s while a 0.25 kg blue bouncy ball rolls
to the left towards it with a speed of 4 m/s. After the collision, the blue bouncy ball rolls to the right
with a speed of 12 m/s. How fast is the yellow ball rolling and in what direction?

Answers

Explanation:

Let yellow ball be m1 = 0.5kg with u1 = 8 m/s and blue ball be m2 = 0.25 kg with u2 = - 4 m /s respectively.

After collision, blue ball travels 12 m/s.

Using conservation of Linear Momentum :

m1u1 + m2u2 = m1v1 + m2v2

0.5* 8 + 0.25 * - 4 = 0.5 * v1 + 0.25 * 12

v1 = 0 m/sec i.e. Yellow ball comes to rest.

Using the proper physics vocabulary tell me how do you get a constant speed

Answers

Answer:

Formula for constant-speed = Total distance / Total time taken

Explanation:

pls help
will give the brainliest!
Urgent!!​

Answers

Answer:

Explanation:

hey there

a) i think ammeter and voltmeter

b) variable resistor

c) To see how the resistance changes when the current changes

I will literally Venmo u a dollar If I can solve this lol haahha

Answers

Answer: Answer is D

why is the unit of temperature is called derived unit

Answers

Explanation:

The SI unit of power is the kilogram-meter2 per second cubed, which is called the watt (1 W = 1 kg-m2/s3). Since power is the energy used per unit of time, it is derived as the energy/time quotient.

Kelvin is a fundamental unit! It's a lot easier to measure temperature than to measure the motion of component particles. Hence, we can accept it as a fundamental quantity. Time is said to be a fundamental unit because it is not dependent on one or more units

A farmer is attempting to take a chicken across a river in a motorboat while a fox waits on shore with a bag of grain. If the river has a current with a velocity of 2.0 m/s and the boat maintains a speed relative to the water of 4.5 m/s, in which direction (angle) should the farmer point the boat so that the boat follows a straight path directly across the river?

Answers

Answer:

The farmer should go approximately 26.39° relative to the direction of and toward the river current velocity or approximate 90 - 26.39 which is 63.12° clockwise from the perpendicular direction across the river

Explanation:

The given parameters are;

The river current velocity = 2.0 m/s

The boat speed relative to the water = 4.5 m/s

Therefore, for the boat to have a resultant velocity that will follow a straight path directly across the river, we have;

The water current velocity, 2 m/s, the relative speed of the boat, 4.5 m/s, and the resultant velocity, v, form a right triangle, with the water current being the base, and the boat's relative speed being the hypotenuse side, while the height is the resultant velocity

Therefore, we have;

The direction of the boat relative to the direction of current the river = θ

The relative speed of the boat × sin(θ°) = The river current velocity

∴ sin(θ°) = The river current velocity/(The relative speed of the boat)

Which gives;

sin(θ°) = 2 m/s/(4.5 m/s) = 2/4.5 = 4/9

θ = sin⁻¹ = sin⁻¹(4/9) ≈ 26.39°

Therefore, the farmer should go approximately 26.39° relative to the direction of  and toward the river current velocity or approximate 90 - 26.39 which is 63.12° clockwise from the perpendicular direction across the river.

Describe how an adult can teach a child to become a racist or bigot using positive reinforcement and negative punishment. Make sure you define the terms and apply the term to a real world example.

Answers

Answer:

by raising them in an environment in wich it is common and giving false information about other races to install bad stereo types and distrust in the child who will grow up to not know any better do to the dumb ignorant parent raised the same way

Explanation:

?????? thats all i got im not a politician BLM

Which of these physical properties is not.similar in all four of these objects

A. Mass
B magnetism
C density
D electrical conductivity

Answers

D electrical conductivity should be the answer

Which of the following is most likely to happen when energy is transferred to an object A) the object will stay exactly the same B)The object Will begin to move C)the force on the object will decrease D) the mass of the object will increase

Answers

Answer:

B. the object will begin to move

Explanation:

If energy is transferred the object will definitely change so it CANNOT be "A". If you add energy the object will have more force so it CANNOT be "C". The mass of an object can't increase just by giving an object energy so it CANNOT be "D"

When energy is transferred to an object, the object is most likely to move either it gains a kinetic energy or it undergo a thermal vibration if thermal energy is applied.

What is energy transfer?

Energy can be transferred from its high energetic area to less . All forms of energy can be transferred like this.For example, heat energy can be transferred through various modes such as conduction, convection, radiation etc.

When an object gain some energy its particles starts to vibrate and move apart. This makes the intermolecular force of attraction between molecules weaker than before and they tend to be more reactive.

The energy transferred to an object does not make any change in mass, or any of its innate properties or does not apply any force. Therefore, option B is correct.

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28.2 km equal how many meters

Answers

Answer:exactly 28200 meters

Explanation:

Maria walks 20 ft north, 35 ft east, and 20 ft south to get to the pool. Find her distance and displacement.

Answers

Answer: distance = 75ft

displacement = 35ft east

The required displacement of maria to get to the pool is 35 ft and the distance is 75 ft.

What are distance and displacement?

To solve this problem, we first need to understand the difference between distance and displacement.

Distance is the total length traveled by an object, regardless of its starting and ending points. In this case, the distance traveled by Maria would be the sum of the distances of each segment of her journey,
Distance = 20 ft + 35 ft + 20 ft = 75 ft

Displacement, on the other hand, is the straight-line distance from the starting point to the ending point, measured in a straight line.

So let's assume the movement of maria on  coordinate where North and East are positive movements and West and south are negative now add the distances,

Displacement =20 + 35 - 20 = 35 ft

Thus, the required displacement of maria to get to the pool is 35 ft and the distance is 75 ft.

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Will the pressure in glass of fruit juice be bigger or smaller than the pressure in water?

Answers

Answer:

smaller

Explanation:

Water have more evaporation

Why magnet has more force at poles than middle ? Don't steal from google

Answers

Middle is the furthest from each pole, there is magnetic force at pole as it is due to the Earth's magnetic core

it's cause the magnetic force is greater where the field lines are crowded

since all the magnetic field lines generate from the poles, the crowd of field lines is maximum near pole

hope that helps !

What is a core sample ????

Answers

Answer:

Core samples are small portions of a formation taken from an existing well and used for geologic analysis. The sample is analyzed to determine porosity, permeability, fluid content, geologic age, and probable productivity of oil from the site. ... Core samples reveal the physical and chemical nature of the rock.

Which explains how to calculate the average acceleration of a moving object?
1.Divide the change in velocity by the change in time.
2.Multiply the change in time by the change in velocity.
3.Divide the change in time by the change in velocity.
4.Subtract the velocity from the change in time.

Answers

Answer Multiply the acceleration by time to obtain the velocity change: velocity change = 6.95 * 4 = 27.8 m/s . Since the initial velocity was zero, the final velocity is equal to the change of speed.

​  

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The minus sign indicates the average velocity is also toward the rear of the plane.

The average velocity of an object does not tell us anything about what happens to it between the starting point and ending point, however. For example, we cannot tell from average velocity whether the airplane passenger stops momentarily or backs up before he goes to the back of the plane. To get more details, we must consider smaller segments of the trip over smaller time intervals. For instance, in the figure below, we see that the total trip displacement,

 

Answer:

bdjdiosfjigjdigjtrht <3

Explanation:

A motorboat heads due west at 15 m/s across a river that flows due south at 7.5 m/s. What is the magnitude and direction of the resultant velocity in m/s? Round off answer to 2 decimal places.​

Answers

Answer:

16.77 m/s, 26.57° south of west

Explanation:

The two velocities form a right triangle.  Use Pythagorean theorem to find the magnitude of the resultant velocity.

v² = (-15 m/s)² + (-7.5 m/s)²

v = 16.77 m/s

Use trig to find the angle.

tan θ = ((-7.5 m/s) / (-15 m/s))

θ = 26.57° south of west

Eric has a mass of 19.0 kg on the earth. What is Eric's weight on earth? What is Eric's weight on Mars? where the acceleration of gravity is approximately 0.381 of that of Earth's? ________.

Answers

Answer:

Weight on Earth = We = 186.2 N

Weight on Mars = Wm = 70.94 N

Explanation:

The weight of an object is defined as the force applied on the object by the gravitational field. The magnitude of weight is given by the following formula:

W = mg

were,

W= Weight of Eric

m = mass of Eric

g = acceleration due to gravity

ON EARTH:

W = We = Eric's Weight on Earth = ?

m = Eric's Mass on Earth = 19 kg

ge = acceleration due to gravity on Earth = 9.8 m/s²

Therefore,

We = (19 kg)(9.8 m/s²)

We = 186.2 N

ON MARS:

W = Wm = Eric's Weight on Mars = ?

m = Eric's Mass on Mars = 19 kg

gm = acceleration due to gravity on Mars = 0.381(ge) = (0.381)9.8 m/s² = 3.733 m/s²

Therefore,

Wm = (19 kg)(3.733 m/s²)

Wm = 70.94 N

How’d the turtle cross the road

Answers

Answer:

He crawled.

Explanation: He crawled with the strength he gained from a leaf.

He did it by doing it.....

what is the momentum of an animal with a mass of 72kg who is moving with a velocity of 2.2 m/s

Answers

Answer:

The answer is

158.4 kgm/s

Explanation:

The momentum of an object when given it's mass and velocity can be found by using the formula

momentum = velocity × mass

From the question

velocity = 2.2 m/s

mass = 72 kg

The momentum is

momentum = 2.2 × 72

We have the final answer as

158.4 kgm/s

Hope this helps you

Given a graph of volocity v . Time what does a horizontal line represent

Answers

Answer:

Acceleration

Explanation:

For example, if the acceleration is zero, then the velocity-time graph is a horizontal line (i.e., the slope is zero). If the acceleration is positive, then the line is an upward sloping line (i.e., the slope is positive).

Horizontal line on a position time graph indicate that the object is

Answers

This means that the body is in rest, as the there is no change in displacement or distance (depending on which graph you are looking at), over time

The position- time graph of an object gives the velocity of the object. If the graph shows a horizontal line along the x axis, the object is stationary.

What is velocity?

Velocity of an object is a physical quantity measuring the distance covered per unit time. It is a vector quantity and thus have a magnitude and direction. Velocity is thus, the ratio of change in distance to the change in time.

v = dx/dt.

A moving object is always associated with certain velocity. Which can be constant or changing. The plot of position v/s time gives the change in position with respect to time. Thus, velocity can be calculated from this.

If the position -time graph shows a horizontal line means there is no change in distance with time and the velocity of the object is zero. Thus, the object is stationary or at rest.

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Describe voltage in terms of charge and electrons.

PLEASE HELP I WILL GIVE BRAINLIEST​

Answers

Answer:

Voltage is a measure of how much energy is delivered to charge. At its most basic, an electron (basic charge) is imparted 1.602×10^−19 joules when moved through an electric potential difference of one volt. An electron is then said to have an energy of 1 electronvolt. So, voltage is energy divided by charge.

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Suppose you take a trip that covers 240 km and takes 3 hours to make. Your average speed is?

80 km/hr
30 km/hr
60 km/hr
240 km/hr
540 km/hr

Answers

Answer:

80km/h hope this helps

Answer:80 km/h

Explanation:

Speed =distance/time

what are examples of velocity and speed

Answers

Explanation:

A train moves at a high velocity. Velocity is the rate of motion, speed or action. An example of velocity is a car driving at 75 miles per hour.

Sunspots are dark areas on the surface of the Sun. They mark strong magnetic fields, and more sunspots indicate that the Sun is more active and is releasing more energy. The following graph presents the average daily number of sunspots from 1900 through 1944. Each data point is the average for one month.
Notice the series of peaks and troughs in the graph. The time from one minimum (trough) to the next is called a Solar Cycle. Solar Cycles can be anywhere from 9 to 14 years long.

What can be predicted with the most certainty from this graph?
A.
The next minimum in the graph will be in 1953.
B.
The average daily number of sunspots will peak in 1949.
C.
The average daily number of sunspots in 1949 will be 80.
D.
The average daily number of sunspots will increase throughout 1945.

Answers

Answer:

D

Explanation:

study island. first answer is wrong

The average daily number of sunspots will increase throughout 1945. therefore the correct answer is option D.

What is a solar system?

It is a system in which the sun's gravitational attraction causes all the planets and celestial bodies to revolve around it.

As specified in the issue statement On the surface of the Sun are spots known as sunspots. Increased sunspots imply that the Sun is more active and is producing more energy since they are a sign of strong magnetic fields.

The average daily number of sunspots from 1900 to 1944 is shown in the graph below. The average for each data point is for one month.

The graph's sequence of peaks and valleys should be noted. A solar cycle is the period of time from one minimum (trough) to the next. Solar cycles can last from nine to fourteen years.

Thus, The average daily number of sunspots will increase throughout 1945, therefore the correct answer is option D.

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an object accelerated at 6.00m/s^2 starting at a velocity of 15.2m/s for 12.4 seconds. what is the objects final velocity?

Answers

The objects final velocity is 89.6m/s

Two cars - Car A and Car B - drive in the same direction down a street. Car B is traveling at 30 m/s. Car A is traveling 20 m/s. Imagine that you're sitting inside Car A and Car B passes you. What is the velocity of Car B relative to you? Don't forget UNITS.

Answers

Answer:derp

Explanation:

A fleeing student covered a distance of 210 meters in 35 seconds. what is the student's speed in meters/second? what is the student's speed in meters/minute?

Answers

Explanation:

Given that,

A student covered a distance of 210 meters in 35 seconds.

We need to find the student's speed in meters/second and also in meters/minute.

Speed, v = distance (d)/time (t)

So,

[tex]v=\dfrac{210\ m}{35\ s}\\\\=6\ m/s[/tex]

We know that, 1 minute = 60 seconds

[tex]6\dfrac{m}{s}=6\times \dfrac{m}{(\dfrac{1}{60})\ \text{minutes}}\\\\=360\ \text{meters/minutes}[/tex]

Hence, the student's speed is 6 m/s or 360 meters/minute.

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