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OleMash [197]
4 years ago
10

A ball is thrown straight up from a point 2 m above the ground. The ball reaches a maximum height of 3 m above its starting poin

t and then falls 5 m to the ground. When the ball strikes the ground, what is its displacement from its starting point?
Physics
1 answer:
qwelly [4]4 years ago
8 0

Answer:

2 m

Explanation:

The displacement of any body is the shortest distance in an object's path between its initial and final point.

The ball would travel 3 m from the point of throwing then fall down 5 m to the ground. The total distance traveled is 7 m.

The displacement of the ball will be the distance from the point of throwing to the ground i.e., 2 m as it is the shortest distance between the initial and final point of the ball's journey.

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Why must the difference between the water level in the eudiometer tube and the water level in the beaker be measured
Bas_tet [7]

Answer:

Explanation:

The difference between the water level in the eudiometer tube and the water level in the beaker must be measured because we have to put into consideration, the pressure of the gases in the eudiometer tube. This said pressure of gas in the eudiometer must equal the atmospheric pressure. If or by chance, the water levels happens not to be at the same height, then this is not the case. And then, as a result, in order to account for the difference between both, while also being able to get accurate results, you have to find the difference or subtract the water levels and then go ahead in converting them to mmHg.

3 0
3 years ago
A light-year measures the _______ that light travels in 1 year.
o-na [289]
<span>A light-year measures the distance that light travels in 1 year. 

Answer : B ) Distance

-Hope this helps.</span>
4 0
4 years ago
Read 2 more answers
What would be the resulting charge of carbon (C) after this element loses four electrons?
Sladkaya [172]

Answer:

Carbon will become positively charged.

The charge of Carbon will be +4.

Explanation:

The charge of Carbon will be +4.

In the periodic table, elements that give out  or lose electrons during electrochemical combinations are called electropositive elements. If carbon loses electrons during the chemical combination, Carbon will become positively charged, with a valency equal to the number of electrons that it lost.

This will make carbon have a charge of +4

7 0
3 years ago
The elementary particle called a muon is unstable and decays in about 2.20μs2.20μs , as observed in its rest frame, into an elec
vredina [299]

Answer:

5.865 μs

Explanation:

t₀ = Time taken to decay a muon = 2.20 μs

c = Speed of Light in vacuum = 3×10⁸ m/s

v = Velocity of muon = 0.927 c

t = Lifetime observed

Time dilation

t=\frac{t_0}{\sqrt{1-\frac{v^2}{c^2}}}\\\Rightarrow t=\frac{2.2\times 10^{-6}}{\sqrt{1-\frac{(0.927c)^2}{c^2}}}\\\Rightarrow t=\frac{2.2\times 10^{-6}}{\sqrt{1-0.927^2}}\\\Rightarrow t=\frac{2.2\times 10^{-6}}{\sqrt{0.140671}}\\\Rightarrow t=\frac{2.2\times 10^{-6}}{0.3750}\\\Rightarrow t=5.865\times 10^{-6}\ seconds

∴Lifetime observed for muons approaching at 0.927 the speed of light is 5.865 μs

3 0
3 years ago
An object was dropped from the plane with 1000 km above the ground with a mass of 300 kg. Find the acceleration of the object ea
Oxana [17]

Answer:

9.8m/s^2

Explanation:

The acceleration due to gravity on earth is 9.8m/s^2 regardless of the mass of the object. This means, in the absence of air resistance, both a 3000 kg object and a 300 kg will accelerate at the same rate of 9.8m/s^2 towards  earth.

The reason the acceleration due to gravity is the same for all masses is that by grace of nature, the inertial mass m of the object from F= ma  equals the gravitational mass m from F =G \dfrac{mM}{R^2}, resulting

ma=G\dfrac{mM}{R^2}

\boxed{a=G\dfrac{M}{R^2}}

which is the acceleration that only depends on the mass of earth and its radius, and not on the mass of the object.

8 0
4 years ago
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