The true statement about an orbit is that the sun and a planet are at the two foci of an orbit. Hence, option B is correct.
An orbit is a curved path taken by an object in celestial mechanics, such as the path taken by a planet around a star, a natural satellite around a planet, or an artificial satellite around an object or location in space, such as a planet, moon, asteroid, or Lagrange point.
Ordinarily, the term "orbit" refers to a trajectory that repeats itself periodically, though it can also apply to a non-repeating trajectory. Kepler's principles of planetary motion roughly predict that planets and satellites have elliptic orbits, with the center of mass orbiting at a focal point of the ellipse.
Hence, this concludes that option B is correct.
To get more information about Orbit :
what is the problem that i need to solve?
It simply means that the longest side of the object is 4 m that is 400cm..
The electromagnetic waves are determined by the wavelength. Hence, the correct option is D.
Electromagnetic waves are made up of vibrating electric and magnetic fields. The electric and magnetic fields are mutually perpendicular to each other. EM waves are transverse in nature.
Electromagnetic waves can travel through the vacuum in the form of radiation. The EM waves travel with the speed of light 3×10⁸ m/s. EM waves have no mass and charge. These waves can carry energy in space.
The behavior of electromagnetic waves depends on its frequency and wavelength. EM waves are classified into 7 types based on its frequency and wavelength. They are classified from radio waves to Gamma rays.
Frequency is inversely proportional to wavelength, f = c / λ. Higher frequencies have shorter wavelength and lower frequencies have longer wavelength.
Thus, the wavelength determines the radiation that an electromagnetic waves. Hence, the option D is correct.
To learn more about Electromagnetic waves:
Eliminate D as there is no nonconservative force, then look at each energies before and after. The speed of the book will increase, so kinetic energy is increasing. The height of the book is increasing, so gravitational potential energy is increasing. However, since the spring is becoming decompressed, the elastic potential energy is decreasing.
it is A
The maximum height the pebble reaches is approximately;
A. 6.4 m
The question is with regards to projectile motion of an object
The given parameters are;
The initial velocity of the pebble, u = 19 m/s
The angle the projectile path of the pebble makes with the horizontal, θ = 36°
The maximum height of a projectile, , is given by the following equation;
Therefore, substituting the known values for the pebble, we have;
Therefore, the maximum height of the pebble projectile, ≈ 6.4 m.
melting ice cream
in order for the ice cream to melt, thermal energy (heat) must be applied to it.
Answer: Once upon a time there was a world without gravity. Billy Bob was sitting at home and his dad went to get some milk. But when he stepped out he floated away. Billy Bob never saw his dad again. The end.
Let's list out the known variables that we are given in this question.
We are trying to solve for displacement in the x-direction.
Find which constant acceleration equation contains all 4 of these variables.
Plug the known values into the equation and solve for delta x.
The car goes 30 m after the driver begins to brake.
the answer should be 30 m
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