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skelet666 [1.2K]
3 years ago
15

Which use of a simple machine changes the direction of a force? A. using a ramp to load boxes onto a truck B. using an axe to sp

lit wood C. removing a bottle cap with a bottle opener D. lifting a rock with a crowbar
Physics
1 answer:
kiruha [24]3 years ago
8 0
A. <span> using a ramp to load boxes onto a truck </span>
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The Cassegrain design provides more compact (shorter) telescopes. Why? (Examine figures 2.4.2 and 2.4.3). The shorter design is
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Answer:

Because the light reflects multiple times until it gets to the Cassegrain focus.

Explanation:

The Cassegrain design can be seen in a reflecting telescope. In this type of design the light is collected by a concave mirror, and then intercepted by a secondary convex mirror, and sends it down to a central opening in the primary mirror (concave mirror), in which a detector is placed (Cassegrain focus)

Since, the light is reflected many times due to Cassegrain design, that leads to shorter telescopes.                    

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3 years ago
The approximate rotation period of the Moon is: A. 1 day B. 1 week C. I month D. Infinite, since the Moon does not rotate, but k
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Answer:

C. 1 month

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4 years ago
3. A bunny and a tortoise start a race from rest. The bunny accelerates at a rate ab for a time to until it reaches its
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3 years ago
Worldwide, the total number of land animals killed for food every hour is ______.
NISA [10]

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8 million animals

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