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Vinvika [58]
3 years ago
12

Which of these is NOT needed to sustain life on a planet? *

Physics
1 answer:
Vadim26 [7]3 years ago
7 0
I think it’s proximity of the sun
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Learning Task 1: Define or describe the following words relat are not familiar with the word, you may ask assistance from y your
Tems11 [23]

Answer:

1.) TABLE = The table is 2.74 m (9.0 ft) long, 1.525 m (5.0 ft) wide, and 76 cm (2.5 ft) high with any continuous material so long as the table yields a uniform bounce of about 23 cm (9.1 in) when a standard ball is dropped onto it from a height of 30 cm (11.8 in), or about 77%.

2.) TENNIS = Tennis is a racket sport that can be played individually against a single opponent (singles) or between two teams of two players each (doubles). Each player uses a tennis racket that is strung with cord to strike a hollow rubber ball covered with felt over or around a net and into the opponent's court.

3.) PING-PONG = Table tennis, also known as ping-pong and whiff-whaff, is a sport in which two or four players hit a lightweight ball, also known as the ping-pong ball, back and forth across a table using small rackets. ... Spinning the ball alters its trajectory and limits an opponent's options, giving the hitter a great advantage.

4.) NET = This is stretched across the centter of the table by a cord attached to a post at either end. It measures 6ft long and the ball must pass over it for a rally to continue.

5.) BALL = The ball, which is spherical and hollow, was once made of white celluloid. Since 1969 a plastic similar to celluloid has been used. The ball, which may be coloured white, yellow, or orange, weighs about 0.09 ounce (2.7 grams) and has a diameter of about 1.6 inches (4 cm).

6.) RACKET = A table tennis racket is made up of two distinct parts - a wooden blade which incorporates the handle together with table tennis rubbers affixed to each side of the blade using water-based glue.

Explanation:

All my answers are

about the tools of the

game of tennis

3 0
2 years ago
How dose the hypothesis and observations connect
gavmur [86]

Answer:

<em>In the observational method, the hypothesis is constructed to explain the observations. A simple one may be a generalization of the observations. A more complex hypothesis may postulate a relationship between the events, and may even be used to predict other observations.</em>

7 0
2 years ago
For two objects in space with very different masses, the gravitational force causes:
guajiro [1.7K]
The answer is B. The less massive object to orbit the more massive object.
Explanation: The more massive the object, the larger its gravitational pull.
Example: the moon orbits the earth because the moon’s mass is smaller than earth, earth orbits the sun because the earth’s mass is smaller than the sun..
7 0
1 year ago
A radioactive nucleus has a half-life of 5*108 years. Assuming that a sample of rock (say, in an asteroid) solidified right afte
Gre4nikov [31]

Answer:

0.002

Explanation:

The half-life of the radioactive nucleus is related to its quantity, by the following equation:

N_{t} = N_{0}2^{-t/t_{1/2}}

<u>Where:</u>

<em>N(t): is the quantity of the radioactive nucleus at time t</em>

<em>N₀: is the  initial quantity of the radioactive nucleus</em>

<em>t: is the time = 4.5x10⁹ years</em>

<em>t(1/2): is the half-life of the radioactive nucleus = 5x10⁸ years</em>

\frac{N_{t}}{N_{0}} = 2^{-4.5 \cdot 10^{9} y/5 \cdot 10^{8} y} = 2 \cdot 10^{-3}

Therefore, the fraction of the radioactive element in the rock today is 0.002.

I hope it helps you!  

7 0
3 years ago
The most unusual looking and the most expensive airplane in the Americas is the ________ bomber, also called the _______________
Kamila [148]

The most expensive military aircraft is B-2 Spirit bomber, which costs 2.2 billion dollars! The Northrop B-2 Spirit, is also known as the Stealth Bomber.

Source: https://www.aviationcv.com/aviation-blog/2016/top-5-most-expensive-military-aircraft

5 0
3 years ago
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