Answer:
The time is 1.8s
Explanation:
The ball droped, will freely fall under gravity.
Hence we use free fall formula to calculate the time by the ball to hit the ground
Where h is the height from which the ball is droped, g is the acceleration due to gravity that acted on the ball, and t is the time taken by the ball to hit the ground.
From the question,
h=16m
Also, let take
By substitution we obtain,
Diving through by 9.8
square root both sides, we obtain
Answer:
Just gonna take this at free points and yes you are right but I am confused on what you wanted us to do
Answer:
C
Explanation:
During nuclear fusion, the high pressure and temperature in the sun's core cause nuclei to separate from their electrons. Hydrogen nuclei fuse to form one helium atom.
Answer:
I=2.80 A
Explanation:
We Know that R =R₀(1+∝ ΔT)
R=R₀ (1+3.9*10⁻³ *(61-20))
R=R₀ (1.1599)
I=V/R=V/(R₀ (1.1599)
1.4 = V/(R₀ (1.1599) ∵ equation 1
We have to calculate I when T=-88°
R =R₀(1+∝ ΔT)
R=R₀ (1+3.9*10⁻³ *(-88-20))
R=R₀ (0.5788)
I=V/(R₀ (0.5788) ∵equation 2
Dividing equation 2 by equation 1
I = 2.80 A
Kepler's third law states that, for a planet orbiting around the Sun, the ratio between the cube of the radius of the orbit and the square of the orbital period is a constant:
(1)
where
r is the radius of the orbit
T is the period
G is the gravitational constant
M is the mass of the Sun
Let's convert the radius of the orbit (the distance between the Sun and Neptune) from AU to meters. We know that 1 AU corresponds to 150 million km, so
so the radius of the orbit is
And if we re-arrange the equation (1), we can find the orbital period of Neptune:
We can convert this value into years, to have a more meaningful number. To do that we must divide by 60 (number of seconds in 1 minute) by 60 (number of minutes in 1 hour) by 24 (number of hours in 1 day) by 365 (number of days in 1 year), and we get
