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3 years ago

What is mightier than steel yet cowers from the sun?

Physics

2 answers:

Levart [38]3 years ago

6 0

Ice is mightier than steel yet cowers from the sun.

Explanation

Steel is the hardest metal used in building heavy vessels for sailing or other kind of transportation.

But as it is a metal, it has freezing point so the steel may get frozen leading to failure in the working of ships at low temperatures.

Even vessels like ships, submarines can break if collided with ice blocks in the northern pole region.

So ice has the capacity to weaken the steel but it will melt easily in sunlight.

So ice is the one which mightier than steel yet cowers from the sun.

JulijaS [17]3 years ago

4 0

Ice is only thing which is mightier than steel because it can breaks things which are made up of steels like ships but in the sunlight ice melts away it means it cowards away.

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A plane flying horizontally at a speed of 50 m/s and at an elevation of 160 m drops a package, and 2.0 s later it drops a second

Anarel [89]

Answer:

386 m

Explanation:

Let's call the horizontal distance between the point of launch and the point of landing of the first package $x\text{ m}$ .

2 seconds after landing at $x$ , the plane has travelled a horizontal distance of $2\text{ s}\times 50 \text{ m/s} = 100\text{ m}$ .

At this new point, the second package is launched. Because it is launched under the same conditions as the first, its horizontal distance from its point of launch is also $x\text { m}$ .

To determine $x$ , we determine the time of fall of the package. Being a vertical motion, the drop has an initial velocity, $u$ , of 0 m/s with acceleration, $a = g = 9.8 \text{ m/s}{}^2$ , and a distance, $s$ , of 160 m. We use the equation of motion:

$s = ut+\frac{1}{2}at^2$

$160 = 0\times t + \frac{1}{2}9.8\times t^2$

$t = \sqrt{\dfrac{160}{4.9}}\text { s}=\dfrac{40}{7}\text { s}$

In this time, the package, with a horizontal velocity of 50 m/s, travels the horizontal distance, $x$ , of

$x = 50 \text{ m/s}\times \dfrac{40}{7}\text { s} = \dfrac{2000}{7}\text { m} = 286 \text{ m}$

The distance apart between both packages is $x+100\text{ m} = 286+100\text{ m} = 386\text{ m}$

7 0

3 years ago

A 35 kg boy is riding a 65 kg go-cart. He pushes on the gas pedal, causing the cart to accelerate at 5 m/s2. Use the equation F

trasher [3.6K]

Answer:

$\boxed {\boxed {\sf 500 \ Newtons }}$

Explanation:

The equation for force is given:

$F=m*a$

First, we must find the total mass, which is the sum of the boy's mass and the go-cart's mass.

total mass= boy's mass + go cart's mass

The boy's mass is 35 kilograms and the go cart's is 65 kilograms.

total mass= 35 kg+ 65 kg=100 kg

Now we know the total mass and the acceleration.

$m= 100 \ kg \\a= 5 \ m/s^2$

Substitute the values into the formula.

$F=100 \ kg * 5 \ m/s^2$

Multiply.

$F= 500 \ kg*m/s^2$

1 kilograms meter per square second is equal to 1 Newton.
Our answer of 500 kg*m/s² is equal to 500 Newtons.

$F= 500 \ N$

The force exerted by the go cart engine is <u>500 Newtons.</u>

4 0

2 years ago

Read 2 more answers

We know that the motion of the Moon around the Earth is due

nadezda [96]

Answer:

YES

Explanation:

Gravity acts as the centripetal force and the velocity earth has keeps it from falling on the sun.

3 0

3 years ago

A bag of sugar weighs 5.00 lb on Earth. What would it weigh in newtons on the Moon, where the free-fall acceleration is one-sixt

gizmo_the_mogwai [7]

Answer:

Earth: 22.246 N

Moon: 3.71 N

Jupiter: 58.72 N

Explanation:

The mass of an object will remain constant in any location, its weight however, can fluctuate depending on its location. For example, a golf ball will weigh less on the moon, but its mass will not be different if it was on earth.

To calculate anything, we need to convert to standard measurements.

5.00 lbs = 2.27 kg

On earth, gravity is measured to be 9.8 m/s², so the weight in Newtons on Earth would be: (2.27 kg) x (9.8 m/s²) = 22.246 N

Repeated on the moon where gravity is (9.8 m/s²) x (1/6) = 1.633 m/s², so the weight in Newtons on the moon would be: (2.27 kg) x (1.633 m/s²) = 3.71 N

Repeated on Jupiter where gravity is (9.8 m/s²) x (2.64) = 25.87 m/s², so the wight in Newtons on Jupiter would be: (2.27 kg) x (25.87 m/s²) = 58.72 N

3 0

3 years ago

how does inertia explain the movement of your body when a car in which you are riding comes to a sudden stop? (8 sentences)

nydimaria [60]

Your body continues to move unless stopped by the seatbelt. An object in motion will remain in motion. Since your body was already moving it will continue to.

5 0

3 years ago