Logical Phys
Dani throws a ball into the air. At the peak of its trajectory, what forces act on it?
What is gravitational force?
The Sun never sets at your location for months at a time. wya?
What is a North Pole / What is a South Pole.
True, because the distance is a larger factor than mass in this case.
If something moves twice as fast, it has twice the kinetic energy.
4x (mv^2)
You see a crescent right before the sunrise. Is it waning or waxing?
Waning.
You weigh 98kg, and stand on a scale in an elevator. The elevator cable snaps. This is what it reads on the scale.
What is 0 Kg?
If the Earth doubled in mass, but size stays the same, what happens to its gravity?
It doubles.
False. Sound needs medium.
A solar eclipse happens because the moon's shadow is very big.
It's not that big actually, and it rarely occurs due to it being so small and the axial tilt not lining up.
At noon, your shadow points South. Where are you?
Northern Hemisphere.
Clive Tolentino circles the Earth at a constant speed. Is he accelerating, and if so, why?
The magnitude of the acceleration does not change, but the direction does.
The Earth orbits the sun for a year. This year is 2024, which is a leap year. Does the Earth fall towards the Sun in a technical sense?
Yes.
Two identical stars are the same distance from Earth.
Star A has twice the surface temperature of Star B.
Star B has twice the radius of Star A.
Which appears brighter to Earth?
Star A.
Higher Magnification lets you see fainter stars.
Spreads light, dims the star.
A star is visible for several nights
It suddenly disappears for a few hours
It later reappears at the same brightness
No explosion, no debris detected
What happened??
Exoplanet transit.
Two balls rolled towards the end of an abysmally large table with 1km length. One ball had a speed of 9.8m/s, while the other ball had a speed of 98m/s. If they fall at the same time, which ball hits the ground first?
Both.
If the moon suddenly stopped orbiting Earth, what happens to the moon?
It falls towards the Earth.
The moon rotates on its axis. Yes or no? How long is a day on the moon?
Yes. One Earth Month ~(29.5 Earth Days)
Solar eclipses are rare because the Moon is very small compared to the Sun
Satellite experiences no engine thrust
Continues moving at constant speed in a curve
Why doesn't it fly off in a straight line?
Centripetal Acceleration.
Hypothetically speaking, divers exploring the titanic went into the kitchen. The kitchen used to contain a lot of food and drinks, but is now desolate. The divers wanted to find alcohol there, and so they went to the winery section. Will they find any wine bottles intact?
Yes. Is it drinkable?
Two people at opposite sides of the Earth look at the night sky. Can they see the same star?
Yes.
An Astronaut is in deep space, away from any stars, in a vacuum. The astronaut does not immediately freeze to death. Why?
Because no Conduction / Convection, Radiation makes him cold pretty slowly.
If the Sun disappears, the Earth flies off after 8 minutes, as gravity is slower than Light. True or False, Why?
False because all EM waves travel at light speed.
A planet completes an orbit in just a few days
Surface temperature is extremely high
The star wobbles strongly despite being massive
What kind of planet is this?
Hot Jupiter.