There is an Observatory close by- and although I have not been there, it is on my list of places that I would like to visit.
It seems appropriate to introduce a math problem here. (I was a High School Math teacher). Astronomy, Golf, Math- they are all related. If you have a grandchild who is an avid Golfer, pose this problem.
How can I calculate the height of a tree, assuming it is 10 AM and I want to get my golf ball to clear the tree? Hint: using its and my shadows? Good for grandmothers and mother to relate to golf-playing family members! By the way, I posed this problem to another grandson, who doesn’t play golf and learns in Yeshivah. His questions were to the point: I need to know the time of day because the numbers will be greater depending upon that. He also came up with the relationship.
From: Doctor Rick Subject:
Re: Measuring by shadow
Solution: My friend posed this question to me and I got the answer! The secret is in the sun’s rays: they fall on both you and the tree from the same direction. We say the rays are parallel. Also, the tree stands straight and so do you, so you and the tree are parallel. Finally, if the ground is flat, the tree’s shadow and your shadow are parallel. We can draw the tree, its shadow, you, and your shadow as triangles. The top of the tree is joined to the shadow of the top of the tree by a line that points back up to the sun. The top of your head and the shadow of the top of your head are joined by another line pointing back up to the sun.
When each side of one triangle is parallel to a side of another triangle, the triangles are SIMILAR. When we use this word in everyday life, we just mean “they are sort of the same, but not quite.” When we use it in math, it has a special meaning: “their shapes are exactly the same, though their sizes don’t have to be the same.” The “tree triangle” and the “you triangle” are similar. The sides of two similar triangles have equal proportions. If the horizontal side of one triangle is twice as long as the horizontal side of the other triangle, then the vertical side of the first triangle is twice as long as the vertical side of the other, and the diagonal sides follow the same pattern. These equal proportions let you figure out one length if you know three others. In the picture above, I marked “your height” as 5 feet, and your shadow as 2 1/2 feet. The tree’s shadow is 50 feet. How long is the tree’s shadow compared to your shadow? 50 100 — = — = 20 2.5 5 The ratio is 20 to 1; that is, the tree’s shadow is 20 times as long as your shadow. Since the triangles are similar, the ratio of the tree’s height to your height is also 20 to 1. If your height is 5 feet, and the tree is 20 times as tall, then the tree’s height is 20 * 5 feet = 100 feet (The “*” is the multiplication sign.) This is how you can use shadow lengths and your own height to measure the height of a tree! – Doctor Rick, The Math Forum http://mathforum.org/dr.math/
EVENT: Hebrew Astronomy Night on Apr 13 at 7-8 pm at the ORT Observatory in Maaleh Adumim Observatory
(at the ORT Aviation & Space School in 07) –
A public stargazing event was held on Wed Apr 13 from 7 to 8 pm at the Maaleh Adumim Observatory
RSVP to 050-440-2216
Program included: short lecture, viewing of the moon and Jupiter
through a telescope, and a tour of the observatory
More details at: wwww.oma.ort.org.il
Limited number of places! RSVP required! Get on their list.
cost: 20 NIS per person
Here is the original notice in Hebrew:
שלום למועדון האסטרונומיה של מעלה אדומים
הנכם מוזמנים לתצפית קהל הרחב:
ביום רביעי ה-13.4.16 בין השעות 19:00-20:00 תתקיים תצפית לקהל הרחב במצפה
הכוכבים, מעלה אדומים.
לתיאום הגעה- טלפון 0504402216
בתוכנית: הרצאה קצרה, תצפית ירח וצדק וביקור במצפה הכוכבים.
לפרטים נוספים: oma.ort.org.il
מס’ המקומות מוגבל !!! חובה לתאם הגעה!
עלות: 20 שקל
מנהל מצפה הכוכבים ופרויקטים במדעי-החלל
אורט תעופה וחלל
Hi everyone! http://jewishartsalon.us5.list-manage2.com/subscribe?u=f79e56ba382e1bb38444d1649&id=c431c05afd
I am forwarding this information and flier on to you, if you haven’t seen this amazing exhibit and body of work by Netanel Morhan please do, it is a “must see”.
When you visit his exhibit to show support and extend your best wishes be sure to mention your connection to the J.A.C. and welcome him into the “Circle” as he has joined our group. A “warm welcome” Netanel!
Blessings and hope to see many of you this Thursday! Leorah Parker 054-615-7935
“Beyond the Body Exhibit” at Beit Hasid Artspace in the German Colony, 45 Emek Rephaim which is open until April 19th:
Wednesday–Thursday(except April 14th) 5-8:30pm
Planning artist talk either April 15 or 16th.
Keep you posted.
Thanks for celebrating with us the opening of Netanel’s Beyond the Body and inviting Netanel to join Jerusalem Artist Circle.
All the best,
Ingredients for crust:
1/2 cup walnuts left in the water overnight
1/2 cup almonds left in the water overnight
2 tablespoons almond milk use fruit syrup on Passover
Ingredients for filling:
1 and 1/2 cup cashew nuts left in the water overnight
1/4 cup maple syrup
3 tablespoons lemon juice
3 tablespoons almond milk/use fruit syrup on Passover
Ingredients for topping (sauce)
1 cup raspberries
10 tablespoons almond milk/use fruit syrup on Passover
– wild strawberries for decoration
For the crust, add all the ingredients in a food processor and blend until small bits remain and it forms into a ball. Remove and set aside.
For the filling do the same thing. Add all the ingredients in a food processor and blend it.
For the topping put all the ingredients in a food processor and blend it. (You can use frozen fruits if you don’t have fresh ones).
Prepare small cake rectangles with parchment paper or coconut flakes. Add the crust first and then the filling. Pour the topping and decorate with wild strawberries and leave it in the freezer for 3 hours. Enjoy!