On ground weight of plane will be measured as its actual weight which will be given as
now when plane is in air its weight is measured as combined effect of earth gravitational force and buoyancy force both
so weight in air will be given as
here since net effect due to air is opposite to the direction of weight so in air the plane weight will be measure less than its weight on ground.
so answer will be
A)more than a plane in the air
The answer is D, only B is a mineral. I always look at it as mineral's atoms are usually closer together but always check your answers.
Answer:
- 0.8333 m/s^2
Explanation:
the equation for calculating acceleration that I have used is
(V2-V1)/t
where V2 is the final recorded velocity and V1 is the initial velocity and t is the duration of the acceleration.
which you plug the numbers in (15 - 25)/12 = 10/12 and because you are slowing down, it should be negative
I am in highschool honors physics so I am not college leveled, I might be wrong but I hope this is useful,
Answer:
Nervous system and immune system
Explanation:
The nervous system is involved because you immediately jumped away, that ur brain and nerves initiating the fight or flight response. The immune system is involved because the tack most likely pierced your skin, so your immune system needs to work to make sure the wound does not get infected.
Answer:
a) α = 9.30 rad / s² and b) t = 2.26 s
Explanation:
Part A
For this exercise we will use the equation of Newton's second law rotational
Σ τ = I α
fr r = I α
Where I is the moment of inertia of the sphere
I = 2/5 M r²
We replace
fr r = 2/5 M r² α
α = 5/2 fr / M r
Let's calculate
M = 250 g (1 kg / 1000g) = 0.250 kg
r = d / 2 = 4.30 / 2
r = 2.15 cm (1m / 100cm) = 0.0215 m
α = 5/2 0.0200 / (0.250 0.0215)
α = 9.30 rad / s²
Part B
Let's use the angular kinematic equation
w = w₀ - α t
t = (w - w₀) / α
They give us the change in angular velocity 21.0 ras / s
t = 21.0 / 9.30
t = 2.26 s
