San Diego, the state’s second largest city, is at the heart of a metropolitan area that comprises all of San Diego county. Surrounding communities include Escondido (north), La Mesa and El Cajon (east), National City, Fashion Valley and Chula Vista (between the northern and southern portions of the city), Imperial Beach (southwest), and Coronado (west; at the northern end of Silver Strand). More than a dozen Indian reservations are scattered throughout the county, and Tijuana, Mexico, lies just south of the border. Inc. 1850. Area, 372 square miles (963 square km). Pop. (2010) 1,307,402; San Diego–Carlsbad–San Marcos Metro Area, 3,095,313; (2020) 1,386,932; San Diego–Chula Vista–Carlsbad Metro Area, 3,298,634.
Famous for its miles and miles of white-sand beaches and amazing weather, the city offers an abundance of fun attractions for visitors of all ages.

#shorts #satisfying #travel #california #sightseeing #tour #walkingtour #walkingvideo

In this video, we explore how RNA interference (RNAi) plays a crucial role in the world of agriculture by controlling roundworms. We find out how a genetically modified plant can induce the RNAi mechanism in roundworms, ultimately killing them.

Timestamps:
00:00 - Introduction
01:15 - Overview of RNAi process
04:12 - How is RNAi involved in pest control?
08:00 - Why does the plant's RNAi mechanism stop in the middle?

Practice this concept: https://www.khanacademy.org/sc....ience/in-in-class-12

Check out more videos and exercises on Biotechnology and its Applications: https://www.khanacademy.org/sc....ience/in-in-class-12

To get you fully ready for your exam and help you fall in love with biology, find the complete bank of exercises and videos for Class 12 Biology here: https://www.khanacademy.org/sc....ience/in-in-class-12

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Created by Sulagna Das

The term matter refers to anything that occupies space and has weight—in other words, that element the universe is made of. All matter is made up of substances called elements, which have specific chemical and physical properties and cannot be broken down into other substances through ordinary chemical reactions.

This video is part of meriSTEM Australian senior science educational resources (CC BY-NC-SA 4.0). Email the team (contact.meristem@anu.edu.au) for further information, course access and curriculum links.

This video is part of meriSTEM Australian senior science educational resources (CC BY-NC-SA 4.0). Email the team (contact.meristem@anu.edu.au) for further information, course access and curriculum links.

In this video, teachers will get an idea about how to teach the mode of heat transfer. Students will learn how heat is a form of energy. They will identify that the application of heat results in the expansion of air. They will also differentiate between the different modes of heat transmission: conduction, convection, and radiation.

Link for the text lesson plan: https://drive.google.com/file/....d/1_GHeuT0bv3Ywr7gAg

This video is produced under IISER Pune – Tata Technologies “STEP for STEM” Project.

Team: Prof. Harinath Chakrapani, Dr Sourabh Dube, Dr Aparna Deshpande, Shubhangi Wankhede, Ashok Rupner, Dr Neeraja Dashaputre, Dr Chaitanya Mungi, Ankish Tirpude, Shraddha Bhurkunde, Dinesh Turkar, Pradnya Pujari, Sakhee Bhure, Dr Apurva Barve, Dr Asim Auti, Shanti Pise, Rohit Piwal and Science media centre team of IISER Pune.

By attaching some needles to a small piece of pipe and bringing a magnet close to them, we can demonstrate magnetic induction and the concept of magnetic memory. Lets see how to make this simple magnetoscope.

Six needles are hanging from a pipe using nylon threads. A magnet is brought close to these needles. North Pole of a magnet induces South Pole at the near ends of the needles. On removing the magnet, the needles move away from each other due ti repulsion between like poles. And if you bring the south pole of the magnet close to needles, only a few of them are repelled. Some needles also show attraction as new pole gets induced. These needles are made of soft iron, which show very poor magnetic retention or memory.

This setup containing hanging needles that demonstrate specific behavior in presence of a magnet is also a model for magnetoscpoe, just like gold leaf electroscope.

Hope you enjoyed this simple demonstration of magnetic induction. For more exciting experiments about math’s and science subscribe to our YouTube channel.
Thanks!

Production team: Ashok Rupner, Chaitanya Mungi, Neha Apte, Prof. B. D. Chakradeo, Shraddha Bhurkunde, Mukund Mehendale
Camera: Vivek Kannadi, Kanchan Sharma
Music: Dr. Manasi Kulkarni

This is a very simple experiment to explain static electricity. Using readily available materials, anybody can perform this experiment in their home.

⁣Newton's third law by simple Balloon

Friends today we will learn a very interesting chemistry experiment using very simple chemicals which are readily available in our kitchens.

We need vinegar, baking soda, a good quality plastic bottle and a balloon.

Fill about a table spoon full of baking soda in the balloon. Pour about 30 millilitres of vinegar in the plastic bottle. Now, attach the balloon to the bottle as shown. Now slowly invert the balloon so that the baking soda and vinegar is mixed.

You’ll notice lot of effervescence on top of the solution and the balloon is inflated with some gas.

Let’s take a look at the chemical reaction that is taking place. Vinegar is a dilute solution of Acetic acid whereas Baking soda is Sodium bicarbonate which is alkaline in nature. Mixing these two chemicals is an example of acid-base neutralization reaction. Usually neutralization reactions produce salt and water. But in this reaction, there is another byproduct which is a gas.

Mixing of acetic acid and sodium bicarbonate produces sodium acetate and carbonic acid. Carbonic acid is made when carbon dioxide reacts with water. Thus carbon dioxide gas is produced when the unstable carbonic acid splits into its components i.e. water and Co2 which inflates the balloon. Carbon dioxide is a colorless and odorless gas and this balloon experiment allows us to see this gas being produced.

Carbonic acid is present in carbonated drinks such as soda or soft drinks which releases CO2 gas when the bottle is opened. CO2 gas is non-combustible so it is used in fire extinguishers. Sodium acetate crystalizes very quickly and is used in hand warmers which are used in very cold regions.

I hope you enjoyed this experiment and learnt something new. For more such fun with hands-on science and math’s activities please visit our YouTube channel IISER Pune science activity centre.

Have fun!

Team: Ashok Rupner, Chaitanya Mungi, Shraddha Bhurkunde, Neha Apte, Sandeep Jadhav

⁣Understanding liquid pressure

Create a database for Jett Car Hire Ltd saved as your name and personal number and carry out the following tasks.
Instructions:
(a). Design a table saved as drivers to hold the above data.
(b). Design a tabular form having a sky-blue background colour, footer of your name you will use to populate the table. Save the form as Data Entry.
(c). Design three queries that will return workers who:
(i). have no remarks against their records. Save the query as Not Appraised.
(ii). drive Car_Type that is not a Wish. Save the query as Not Wish.
(iii). celebrate birth day in the month of January. Save the query as Born Jan.
(d). Create a report to return drivers who drive a Premio Car_Type. Save the report as Premio.
(e) Create a report having all the records on one sheet. Save the report as All.
The report should have the following details:
(i). A good red line boarder.
(ii). Group and sort your records in order of car_type
(iii). Add a title: MOTO VEHICLES INFORMATION REPORT size 24
(f) Add an image Motor.png on your report to serve as a logo
(g) Print your queries and report only.


More Video Lessons On Database Access By Kakuru Benard
Lesson 1: https://youtu.be/dJaCGMqGJvc
Lesson 2: https://youtu.be/Y3W9DVcgEPU
Lesson 3: https://youtu.be/qNnvdX1ibRk
Lesson 4: https://youtu.be/41UWvApgg58
Lesson 5: https://youtu.be/REQESvACSSs
Lesson 6: https://youtu.be/RoXjFYqwcSo
Lesson 7: https://youtu.be/NIjSEl5Kopw
Lesson 8: https://youtu.be/FUdtRE4fKf8
Lesson 9: https://youtu.be/n5PDGCFKyLM
Wakisha 2023: https://youtu.be/U5-oYEIUn5o
UNEB 2023 Paper 2: https://youtu.be/jAgtwfS6OC8
UNEB 2023 Paper 3: https://youtu.be/E2bwpS-Gwgw
UNEB 2023 Paper 1: https://youtu.be/GWRXjetAjpg

Database Lesson 4

More Video Lessons On Database Access By Kakuru Benard
Lesson 1: https://youtu.be/dJaCGMqGJvc
Lesson 2: https://youtu.be/Y3W9DVcgEPU
Lesson 3: https://youtu.be/qNnvdX1ibRk
Lesson 4: https://youtu.be/41UWvApgg58
Lesson 5: https://youtu.be/REQESvACSSs
Lesson 6: https://youtu.be/RoXjFYqwcSo
Lesson 7: https://youtu.be/NIjSEl5Kopw
Lesson 8: https://youtu.be/FUdtRE4fKf8
Lesson 9: https://youtu.be/n5PDGCFKyLM
Wakisha 2023: https://youtu.be/U5-oYEIUn5o
UNEB 2023 Paper 2: https://youtu.be/jAgtwfS6OC8
UNEB 2023 Paper 3: https://youtu.be/E2bwpS-Gwgw
UNEB 2023 Paper 1: https://youtu.be/GWRXjetAjpg

For practice questions after each video, register an account to access our free senior science courses at https://courses.meristem.anu.edu.au. Teachers can access free lesson plans and in-class activities by joining our teacher community via http://meristem.anu.edu.au/ind....ex.php/new-to-merist

This video is part of meriSTEM Australian senior science educational resources (CC BY-NC-SA 4.0). Email the team (contact.meristem@anu.edu.au) for further information, course access and curriculum links.

Fidget spinners are toys that have gained popularity these days as they spin for a very long time and stay balanced while spinning.
Today we will make an innovative handy electricity generator by using fidget spinner. In this simple model, we use spinning motion to create a fluctuating magnetic field which in turn generates electricity.
To design the generator, we need
1. Thin insulated copper wire
2. A fidget spinner
3. 3 Neodymium magnets
4. Cylinder caps and bottle cap
5. LED
6. Wooden board
7. Bottle cap
8. Cutters
9. Glue

The key thing about the fidget spinner is the ball bearing at the center of the toy which allows free rotation. The design of this part is very simple.

• Stick a disk neodymium magnet on one side of each arm of the fidget spinner using glue. Please make sure that the magnets are attached at the center of the circle to make it balanced.
• To make the coil, wind insulated copper wire on a cylindrical cap or PVC pipe. Wind the wire proximately 1000 times to make the coil as shown.
• Keep both ends of the wire uncoiled to serve as connection points. Tie this coil at several places to prevent it from unwinding. Wind the wires such that the windings do not open easily.
• Scrape off the insulation at the ends of two leads of the coil. Carefully check if the insulation is removed completely. Now join the LED to the coil. Your coil and LED assembly are now ready.
• Now place the fidget spinner on the bottle cap to get some height and keep the coil LED assembly underneath the magnet. Keep the gap between the magnet and the copper coil minimum.
• When you spin the magnets attached to fidget spinner above the coil then you see the LED glow.
• Once you have got one coil assembly to work, go ahead and mount the assembly on a wooden strip.
• With help of glue stick the cylindrical cap, coil assembly and the LED on the wooden strip.
• Stick the spinner on the cylindrical cap using glue. Let the complete assembly dry.
• Make sure that the magnets attached to the spinner do not touch the coil. When you spin the magnets above the coils then you can see the LED glowing. You can spin the toy in the dark to see this beautiful effect.
• The model works according to Faraday’s law which states that a changing magnetic field through a coil of wire induces an electromotive force (emf) in the coil which in turn causes current to flow. The law describing induced emf is named after the British scientist Michael Faraday.
So friends play with your fidget spinner and make it do more things than just spinning!
We hope you learned some new today from these experiments.
To learn more such Fun hands-on science and math’s activities please visit our YouTube channel “IISER Pune science activity center”.
Have fun!

Ashok Rupner, Chaitanya Mungi, Shraddha Bhurkunde, Neha Apte, Sandeep Jadhav Music: Dr. Manasi Kulkarni

This topic is covered in SSC 10th Std. Science Part 1, Chapter 4: Effects of Electric Current, Page No. 59-60 and NCRT 10th Std. Chapter 10: Magnetic Effects of Electric Current, Page No. 233-236.

This video is part of meriSTEM Australian senior science educational resources (CC BY-NC-SA 4.0). Email the team (contact.meristem@anu.edu.au) for further information, course access and curriculum links.

This video is part of meriSTEM Australian senior science educational resources (CC BY-NC-SA 4.0). Email the team (contact.meristem@anu.edu.au) for further information, course access and curriculum links.

For practice questions after each video, register an account to access our free senior science courses at https://courses.meristem.anu.edu.au. Teachers can access free lesson plans and in-class activities by joining our teacher community via http://meristem.anu.edu.au/ind....ex.php/new-to-merist

This video is part of meriSTEM Australian senior science educational resources (CC BY-NC-SA 4.0). Email the team (contact.meristem@anu.edu.au) for further information, course access and curriculum links.

In today’s world, hundreds of appliances use a motor. So, friends today let us make a very simple DC motor with house hold materials. You need a battery, safety pins, insulated copper wire, magnets, old bicycle tube, scissors and a cutter.
Take a 1.5 meter of insulated copper wire and wind it around the battery. Move it around 10 turns and remove it from the battery. Take one end and tie a knot and stretch it out. Repeat the same at other end. For equal distances of the weight both the knots should be diametrically opposite. Trim both ends to 3 cm. Now take a cutter and scrape off three sides on one end such that one side is still insulated. On other diametrically opposite side scrape the insulation entirely.
The coil is ready now.
Next take an old bicycle tube and cut two broad rubber bands. Stretch and fix these rubber bands on battery and tuck in the magnet and the safety pins. The motor is now ready. If you place the coil in this assembly it starts.
A motor is a device that converts electrical energy into mechanical energy. When the coil is connected to the battery current passes through it which makes it electromagnet. This electromagnet has its north and south poles. The permanent magnet placed in the vicinity of the magnet gives it attractive and repulsive kick depending on the polarity of both the magnets and the coil rotates.
As you might remember as we purposely left the insulation at one end. This precisely contributes switching the current on and off for every rotation.
Current passing, magnetic field and number of turns are the three important factors.
Wasn’t it simple? So make your own dc motor and have fun!


Team: Ashok Rupner, Apurva Barve, Shanti Pise, Prachi Pasalkar, Shilpa Jain

Some of you may have difficulties in understanding Highest Common Factor (HCF) and Least Common Multiple (LCM). But these mathematical concepts can be understood easily with some activities. Let's find out!

HCF: The numbers that can divide a given number completely (leaving a remainder of zero) are called its factors. The highest common factor (HCF) of a group of numbers is the largest common factor of the numbers. Lets find out how to find HCF of two numbers by some performing activities.

PRIME FACTORIZATION 0:59
One method of determining the HCF of two (or more) numbers is by representing both numbers as products of their prime factors. The HCF is a factor that is common to both/all numbers and also the largest such factor. Hence, we multiply all the prime factors that are common to both/all numbers in order to obtain the highest common factor of the two numbers.

CONTINUED DIVISION 3:02
Another method of determining the HCF of two numbers is by continued division. It is also called Euclid's Algorithm. It is a process by which we repeatedly eliminate the smaller number from the larger number until we get an equal number on both sides.

The steps to follow in continued division are as follows:
1. Make two columns and write one number in each column.
2. Compare the two numbers. Subtract the smaller number from the larger one.
3. Compare the two numbers again. Subtract the smaller number from the larger one.
4. Repeat this step until the numbers on both sides are equal. This number is the HCF of the two numbers we began the algorithm with.

Try both these methods with many different pairs/groups of numbers!
For smaller numbers, try to guess what the HCF/GCD would be and check your answer.
Use prime numbers with composite numbers or pairs/groups of prime numbers. What do you observe about their HCF in each case?

LCM 4:33
The smallest number which is a multiple of two numbers is called their least common multiple (LCM). The activity described in the video visually explains what the LCM of two numbers denotes - it is the smallest number where the multiples of the given pairs/groups of numbers coincide, i.e. the smallest number which is a multiple of all the numbers we are calculating the LCM of.

Make your own number line and cut out many strips of paper, divide each one of them into intervals representing different numbers, and try to find the LCMs of different pairs/groups of numbers!

Once again, what do you observe when you calculate the LCM of prime numbers, or prime and composite numbers, or composite numbers? Are the prime factors of each number in the pair/group also somehow related to their LCM?"

Presented by: Vrushali Sahasrabudhe, Sevasadan English Medium School, Pune

Produced by: IISER Pune Science Activity Center
Website: https://www.iiserpune.ac.in/ou....treach/science-activ
Activities: https://sites.google.com/acads.....iiserpune.ac.in/iis
Subscribe to the IISER Pune Science Activity Center YouTube channel: https://www.youtube.com/c/IISE....RPuneScienceActivity