the ratio of the tota
Volume
in the oil. Find how many balls will be required to be dropped to raise the level of the oil
radius the sphere. How many small shots
surface area of shots and the surface area of the sphere.
29. Oil is contained in a cylindrical jar of radius 6 cm. Iron balls of radius 1.5 cm are
dropped
W
и w
10 on
Since
than
-6cm->
14cm
18. Clear
by 2 cm
30. A toy is in the shape of a right circular cylinder with a
hemisphere on one end and a cone on the other. The
height and radius of the cylindrical part are 14 cm and 6
cm respectively. The radii of the hemispherical and coni-
cal parts are the same as that of the cylindrical part. Cal-
culate the surface area of the toy if height of the conical
part is 10 cm (Fig. 18.13).
31. A storage tank consists of a circular cylinder with a hemi-
sphere adjoined on either ends. If the external diameter of
the cylinder is 1.0 m and its length is 7 m. What will be the
cost of painting the outside at Rs. 10 per sq. m?
Heig
Slant
= 1
Fig. 18.13
... 1
Answers
Answer:
Though the world has dealt with other pandemics in the past, COVID-19 has been spreading fast. Additionally, the virus is quite contagious and can pass between people before any symptoms appear.
The worry around the virus, and the effort to contain it, stems from a lack of previous experience with it. Since the virus is previously unknown, highly contagious, and passes easily from one person to the next, public health and government officials around the world are working hard to contain the spread of the virus while a vaccine is still unavailable.
COVID-19 spreads worry around the world
Photo by visuals on Unsplash
Why Schools Are Closing
As part of the effort to contain the spread of the coronavirus, public spaces such as schools, universities, and offices are closing down so that people can stay at home and prevent further spread.
In countries, such as China, where testing and quarantine measures were taken, the spread was able to level out. Measures that are taken to slow the rate of infection include social distancing, limits on event sizes, and home quarantine when necessary.
Closing schools and offices ensures that people can limit their interactions with others and slows the spread of the virus while the healthcare system copes with the pandemic.
Schools are closed and children are home until further notice
Photo by Kelly Sikkema on Unsplash
What Are The Alternatives When Schools Close
1. Online learning
Many schools and universities are opting to continue their normal classes on online platforms. This includes the use of online tools, such as group video programs, that allow teachers and students to meet and conduct classes over the internet.
Another way that students are continuing their studies is through distance education, which uses online programs that replace instructors with educational material that students study on their own.
An example of distance learning would be online classes or videos which students use on their own time, as opposed to meeting live with the teacher and other students.
However, not all schools and universities were able to make it online and may soon be closed forever. Institutions like University of the People – an online, tuition-free, US accredited university – have always been online. Because of that, students can learn with us anywhere, anytime. We don’t have a physical campus, so our doors are always open! Nas Daily, an impactful social media influencer, talks about this, how students are demanding more value and lowers costs for their collegiate studies, and other higher education news in his video below.
2. Free online programs
In light of the pandemic, and the interruption of normal education, many online educational platforms have been advertising free educational tools for students around the world who are stuck at home.
Companies such as Scholastic and Coursera are advertising free online courses to encourage students to continue learning at home, and websites such as Unesco and Openculture are creating lists of free online courses and resources for anyone who wishes to learn at home
Step-by-step explanation: