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4 years ago

All of the planets stay near the ecliptic as they move on the Celestial Sphere

Physics

1 answer:

stellarik [79]4 years ago

3 0

Answer:

True

Explanation:

As the Earth goes around the Sun, it will appear that Earth is stationary and Sun is going around it. One can observe the same in real life as well. This apparent path followed by the Sun is called Ecliptic. The plane consisting Ecliptic is called as Ecliptic plane which is same as the orbital plane of Earth.

All the planets of the Solar system are also going around the Sun. Their orbital plane has negligible tilt with respect to Ecliptic plane. Due to this the planets will always appear near to the Ecliptic as they move on the celestial sphere.

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A projectile of mass 6.8 kg kg is shot horizontally with an initial speed of 14.5 m/s from a height of 26.7 m above a flat deser

sleet_krkn [62]

Answer:

Explanation:

Given

mass of projectile $m=6.8\ kg$

initial horizontal speed $u_x=14.5\ m/s$

height $h=26.7\ m$

Considering vertical motion

velocity gained by projectile during 26.7 m motion

$v^2-u^2=2 as$

v=final velocity

u=initial velocity

a=acceleration

s=displacement

$v^2-(0)^2=2\times (9.8)\times (26.7)$

$v=\sqrt{523.32}$

$v=22.87\ m/s$

Horizontal velocity will remain same as there is no acceleration

final velocity $v_{net}=\sqrt{(v)^2+(u_x)^2}$

$v_{net}=\sqrt{733.57}=27.08\ m/s$

Initial kinetic Energy $K_i=\frac{1}{2}mu_x^2$

$K_i=\frac{1}{2}\times 6.8\times (14.5)^2=714.85\ J$

Final Kinetic Energy $K_f=\frac{1}{2}mv_{net}^2$

$K_f=\frac{1}{2}\times 6.8\times (27.08)^2$

$K_f=2493.30\ J$

Work done by all the force is equal to change in kinetic Energy of object

Work done by gravity is $W_g$

$W_g=\Delta K$

$W_g=2493.30-714.85=1778.45\ J$

8 0

3 years ago

When a car suddenly stops at a red light, a book lying on the car seat slides forward. Why does the book continue to move forwar

goblinko [34]

Answer:

Explanation:

The answer is c because Newton’s third law states “ for every action there is an equal and opposite reaction.” Since the car quit moving the book did not stay at rest because there was a reaction.

3 0

3 years ago

Read 2 more answers

Difference between national park and wild life reserve

OleMash [197]

Answer:

wildlife reserves are not available for camping...but you can camp at a skatepark

7 0

3 years ago

Calculate the heat energy required to increase the temperature of 3 kg of water by 20ºC. The specific heat capacity of water is

Marina86 [1]

Answer:

Heat energy required = 252000J or 252KJ.

Explanation:

<u>Given the following data;</u>

Mass = 3kg

Temperature = 20ºC

Specific heat capacity of water = 4200 J/kg°C

To find the heat energy required;

Heat capacity is given by the formula;

$Q = mct$

Where;

Q represents the heat capacity or quantity of heat.
m represents the mass of an object.
c represents the specific heat capacity of water.
t represents the temperature.

Substituting into the equation, we have;

$Q = 3*4200*20$

Q = 252000 Joules or 252 Kilojoules.

6 0

3 years ago

When the reflecting wave flips upside-down on a stretched

blondinia [14]

The reflecting wave flips upside-down on a stretched string when the wave moves from a less dense part of the rope moves toward a boundary that has a higher density. Hence the correct answer is (Option E).

<h3>What is a Reflecting Wave?</h3>

A reflecting wave is a wave that abruptly changes its propagation direction when it hits the boundary between two media.

An echo is a real-world example of a reflecting wave.

Learn more about Reflecting Waves at:
brainly.com/question/64516

6 0

2 years ago