Answer:
The total amount of energy that would have been released if the asteroid hit earth = The kinetic energy of the asteroid = 1.29 × 10¹⁵ J = 1.29 PetaJoules = 1.29 PJ
1 PJ = 10¹⁵ J
Explanation:
Kinetic energy = mv²/2
velocity of the asteroid is given as 7.8 km/s = 7800 m/s
To obtain the mass, we get it from the specific gravity and diameter information given.
Density = specific gravity × 1000 = 3 × 1000 = 3000 kg/m³
But density = mass/volume
So, mass = density × volume.
Taking the informed assumption that the asteroid is a sphere,
Volume = 4πr³/3
Diameter = 30 m, r = D/2 = 15 m
Volume = 4π(15)³/3 = 14137.2 m³
Mass of the asteroid = density × volume = 3000 × 14137.2 = 42411501 kg = 4.24 × 10⁷ kg
Kinetic energy of the asteroid = mv²/2 = (4.24 × 10⁷)(7800²)/2 = 1.29 × 10¹⁵ J
The approach here is to decompose all directions into North and East and then do simple Cartesian addition of the obtained coordinates.
S1 = 399 E
S2 = 552 Km 58.5 deg west of north ;
= 552 cos (58.5) N - 552 sin (58.5) E
= 288.41 N - 470.65 E
S3 = 890 N
total S = (890 + 288.41) N + (399 - 470.65) E
S = 1178.41 N - 71.65 E
D =
D = 1180.58 Km
direction = atan(N/E) = -86.52 deg
means : 3.48 deg west of north
Answer:
The key point was that Kennedy challenged Nixon to a series of televised debates. It was the first televised presidential debate in American history.
In 1960, 88 % of American homes had television. About 2/3 of the electorate watched the first debate on TV. Nixon was recovering from a knee injury, he looked drained. Kennedy, meanwhile, had been resting in a hotel for an entire weekend, he looked tan and confident.
Most Americans watching the debates voted for Kennedy, most radio listeners seemed to give the edge to Nixon. hope this helps
The answer to this is CP Air Mass. cP stands for Continental Polar Air Mass. This is the type of air mass that comes from Northern Canada. This kind of air mass is cold, having a little moisture only and you can expect cold seasons during the months of winter.