1. Tectonic plates move
2. Magma forms and rises through the cracks
3. Lava flows onto the Earth’s surface
4. Lava cools and hardens to form igneous rock
Answer:
The distance between the submarine is, d = 9933.3 m
Explanation:
Given data,
The speed of the submarine A and B, v = 5 m/s
Submarine A produces a pulse of sound to detect B at a distance, d = 10 km
= 10000 m
The speed of sound in water is, V = 1500 m/s
The time period to receive echo is given by the formula,
t = d / v
= 10000 / 1500
= 6.67 s
The distance between the submarine is given by the relation
d = 10000 - 2(v x t)
= 10000 - 2(5 x 6.67)
= 9933.3 m
Hence, the distance between the submarine is, d = 9933.3 m
First we need to find the speed of the dolphin sound wave in the water. We can use the following relationship between frequency and wavelength of a wave:
where
v is the wave speed
its wavelength
f its frequency
Using
and
, we get
We know that the dolphin sound wave takes t=0.42 s to travel to the tuna and back to the dolphin. If we call L the distance between the tuna and the dolphin, the sound wave covers a distance of S=2 L in a time t=0.42 s, so we can write the basic relationship between space, time and velocity for a uniform motion as:
and since we know both v and t, we can find the distance L between the dolphin and the tuna:
Answer:
Momentum (P)= 3.15Kg.m/s
Explanation:
Because momentum by definition is the product of mass and velocity, therefore, it's calculated by the formula;
P=mv,,,
where 'P' Is the momentum
'm' is mass in Kilograms, note that mass should be in Kilograms, therefore the 450grams should be converted to kilograms by dividing it with a 1000, i.e (450g×1kg/1000g)= 0.45kg, and now you can substitute in the formula because you have everything you need to find momentum in the right si units.
so P=mv
P=0.45Kg×7m/s
P=3.15Kg.m/s