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gavmur [86]
4 years ago
8

What is a specific name for the rock formed when lava cools and hardens at earths surface

Physics
1 answer:
BabaBlast [244]4 years ago
5 0
<span>The rock formed when lava cools and hardened at the earths surface- that would be the Igneous Rock.</span>
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A mixture consists of sand, salt, and iron filings. Which of the following instruments or materials would not be useful in separ
Zanzabum
Well water would prob be your best bet, you could extract the salt first and then use a magnet to seperate the iron filing from the sand
5 0
4 years ago
If a 25jg car accelerates at a speed of 100 m/s^2, what will the force of the car be ?
Tema [17]
The answer is B............
6 0
3 years ago
A racing car’s velocity is increased from 44 m/s to 66 m/s in 11 seconds. What is the acceleration? and what is the displacement
Musya8 [376]

Answer:

Explanation:

Acceleration is defined as the change in velocity per unit of time

Acceleration (a) = ΔV/t

V = Velocity      t = time

ΔV = V₂ - V₁      t = 11s

V₁ = 44m/s

V₂ = 66m/s

ΔV = 66 - 44

     = 22m/s

Acceleration (a) = 22/11

                          = 2m/s²

Displacement (d): Displacement equals the original velocity multiplied by time plus one half the acceleration multiplied by the square of time.

d = v₀ + 1/2*at²

v₀ = 44m/s

a = 2m/s

t = 11s

d = 44 + 1/2*(2 x 11²)

  = 44 + 121

d = 165m

8 0
4 years ago
A helicopter is hovering above the ground. Jim reaches out of the copter (with a safety harness on) at 180 m above the ground. A
vesna_86 [32]

Answer:

The maximum height of the package is 140 m above the ground. Jim Bond will not catch the package.

Explanation:

Hi there!

The equation of height and velocity of the package are the following:

h = h0 + v0 · t + 1/2 · g · t²

v = v0 + g · t

Where:

h = height of the package at time t.

h0 = initial height.

v0 = initial velocity.

t = time.

g = acceleration due to gravity (-9.81 m/s² because we consider the upward direction as positive).

v = velocity of the package at a time t.

First, let´s find the time it takes the package to reach the maximum height. For this, we will use the equation of velocity because we know that at the maximum height, the velocity of the package is zero. So, we have to find the time at which v = 0:

v = v0 + g · t

0 = 50.5 m/s - 9.8 m/s² · t

Solving for t:

-50.5 m/s / -9.81 m/s² = t

t = 5.15 s

Now, let´s find the height that the package reaches in that time using the equation of height. Let´s place the origin of the frame of reference on the ground so that the initial position of the package is 10 m above the ground:

h = h0 + v0 · t + 1/2 · g · t²

h = 10 m + 50.5 m/s · 5.15 s - 1/2 · 9.81 m/s² · (5.15 s)²

h = 140 m

The maximum height of the package is 140 m above the ground. Jim Bond will not catch the package.

6 0
3 years ago
State the career function of electrical engineering​
Flauer [41]

Answer:

Explanation:

Electrical engineers design, develop, and test electrical devices and equipment, including communications systems, power generators, motors and navigation systems, and electrical systems for automobiles and aircraft. They also oversee the manufacture of these devices, systems, and equipment.

7 0
3 years ago
Read 2 more answers
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