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An accelerometer is a device that uses the extension of a spring to measure acceleration in terms of Earth’s gravitational acceleration (g). What is the approximate acceleration if this accelerometer spring is extended just 0.43 centimeters?

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# Tag: gravitational

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Arrange the balls in order from greatest amount of gravitational potential energy to least

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Frogs are amphibians, meaning they need land. The open ocean does not have land.

Dolphins live in and travel around the ocean, not needing land and capable of swimming great depths so they are capable of living in the open ocean.

Alligators live in areas with shallow waters where they can cool down and hide to capture unsuspecting prey. They need to breathe every now and then and even though they are fantastic swimmers in rivers, they can’t go too deep. They also need land to lay their eggs and mate, so the open ocean is not the best option for an alligator.

Hippopotami also live in shallow water like alligators. And like alligators, they need to breathe every now and then and they can’t go too deep in water. Rivers are great for them, but they won’t last too long in an open ocean.

Thus, the organism most likely adapted to the open ocean are dolphins.

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**Answer:**

1) Water has very high specific heat.

2) It expands when it freezes

3) ability to dissolve in ionic substances

4) Water molecules at the surface experience fewer hydrogen bonds than water molecules within the liquid.

**Explanation:**

1) Water molecules due to their high specific heat , undergo relatively less increase in temperature after absorbing heat. So they prevent their adjoining area to experience sharp increase in temperature.

2) Water is an example which expands on freezing. In it , large spaces are left between molecules when it cools. It happens because hydrogen bonds prevent any two molecules to come very close thereby creating gaps. This gap is filled up when ice melts , which results in overall reduction in volume of water.

3) Uneven distribution of charge results in water molecules becoming polar in nature . A polar substance can be dissolved in polar solvents only.

4) It is due to property of surface tension. Property of surface tension results due to molecules of water near the surface experiencing a net downward force due to hydrogen bonds . It is due to fewer hydrogen bonds made by them.

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**Answer:**

1) Water has very high specific heat.

2) It expands when it freezes

3) ability to dissolve in ionic substances

4) Water molecules at the surface experience fewer hydrogen bonds than water molecules within the liquid.

**Explanation:**

1) Water molecules due to their high specific heat , undergo relatively less increase in temperature after absorbing heat. So they prevent their adjoining area to experience sharp increase in temperature.

2) Water is an example which expands on freezing. In it , large spaces are left between molecules when it cools. It happens because hydrogen bonds prevent any two molecules to come very close thereby creating gaps. This gap is filled up when ice melts , which results in overall reduction in volume of water.

3) Uneven distribution of charge results in water molecules becoming polar in nature . A polar substance can be dissolved in polar solvents only.

4) It is due to property of surface tension. Property of surface tension results due to molecules of water near the surface experiencing a net downward force due to hydrogen bonds . It is due to fewer hydrogen bonds made by them.

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Fg=(G*m₁*m₂)/r₂, where G=6.67*10^-11 m³ kg⁻¹ s⁻² is the gravitational constant, m₁ and m₂ are the masses of the two bodies and r is the distance between those bodies.

Due to the gravitational attraction the pencil and the eraser will attract if we there is no friction on the surface.

m₁=10 g=0.01 kg is the mass of the pencil

m₂=20 g=0.02 kg is the mass of the eraser

r=2.5 cm = 0.025 m

First we calculate the Fg:

Fg={(6.67*10^-11)*0.01*0.02}/(0.025²)=2.1344*10^-11 N

To get the velocity v of the pencil:

v²=2as, where a is the acceleration of the pencil and s is the path. In our case s=r so we can write:

v²=2ar

a=Fg/m₁= 2.133*10^-9 m/s²

v²=2*(2.133*10^-9)*0.025=1.0665*10^-10

v=√(1.0665*10^-10)=1.0327*10^-5 m/s

We have the velocity and the acceleration, so we can calculate the time t with the equation:

t=v/a=(1.0327*10^-5)/(2.133*10^-9)=4841.6 s

1 hour has 3600 s so when we divide time t in seconds by 3600 we get time T in hours:

T=t/3600=4841.6/3600=1.3449 h.

So the time for the pencil and eraser to touch is T=1.3449 hours.

Also time T can be expressed like T= 1h and 20 mins and 41.64 s

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**Answer:**

1) Water has very high specific heat.

2) It expands when it freezes

3) ability to dissolve in ionic substances

4) Water molecules at the surface experience fewer hydrogen bonds than water molecules within the liquid.

**Explanation:**

1) Water molecules due to their high specific heat , undergo relatively less increase in temperature after absorbing heat. So they prevent their adjoining area to experience sharp increase in temperature.

2) Water is an example which expands on freezing. In it , large spaces are left between molecules when it cools. It happens because hydrogen bonds prevent any two molecules to come very close thereby creating gaps. This gap is filled up when ice melts , which results in overall reduction in volume of water.

3) Uneven distribution of charge results in water molecules becoming polar in nature . A polar substance can be dissolved in polar solvents only.

4) It is due to property of surface tension. Property of surface tension results due to molecules of water near the surface experiencing a net downward force due to hydrogen bonds . It is due to fewer hydrogen bonds made by them.

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Fg=(G*m₁*m₂)/r₂, where G=6.67*10^-11 m³ kg⁻¹ s⁻² is the gravitational constant, m₁ and m₂ are the masses of the two bodies and r is the distance between those bodies.

Due to the gravitational attraction the pencil and the eraser will attract if we there is no friction on the surface.

m₁=10 g=0.01 kg is the mass of the pencil

m₂=20 g=0.02 kg is the mass of the eraser

r=2.5 cm = 0.025 m

First we calculate the Fg:

Fg={(6.67*10^-11)*0.01*0.02}/(0.025²)=2.1344*10^-11 N

To get the velocity v of the pencil:

v²=2as, where a is the acceleration of the pencil and s is the path. In our case s=r so we can write:

v²=2ar

a=Fg/m₁= 2.133*10^-9 m/s²

v²=2*(2.133*10^-9)*0.025=1.0665*10^-10

v=√(1.0665*10^-10)=1.0327*10^-5 m/s

We have the velocity and the acceleration, so we can calculate the time t with the equation:

t=v/a=(1.0327*10^-5)/(2.133*10^-9)=4841.6 s

1 hour has 3600 s so when we divide time t in seconds by 3600 we get time T in hours:

T=t/3600=4841.6/3600=1.3449 h.

So the time for the pencil and eraser to touch is T=1.3449 hours.

Also time T can be expressed like T= 1h and 20 mins and 41.64 s

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**Answer:**

1) Water has very high specific heat.

2) It expands when it freezes

3) ability to dissolve in ionic substances

**Explanation:**

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**The tension in the rope when gymnast climbs a rope with constant speed will be boxed{588{text{ N}}}.**

**Further explanation:
**

We have to calculate the tension in the rope when the gymnast climbs a rope with the constant speed.

**Given:
**

We have given that,

The mass of the gymnast is .

**Formula and concept used:
**

Consider a body is moving with an acceleration in upward direction, then the direction of the inertia force will be in the opposite direction of the direction of the acceleration.

That is, the direction of the inertia force will be in the downward direction for the moving body.

Inertia force can be calculated as,

Here, is the inertia force and is the acceleration.

So, the net downward force will be equal to the sum of the weight of the body and the inertia force.

Substitute the values of as and as in above equation.

…… (1)

Here, gymnast is climbing with the constant speed.

So, acceleration of the gymnast in upward direction will be zero.

Substitute for in equation (1).

So, the net downward force will be,

This downward force will be balanced by the tension in the rope.

So, tension in the rope will be,

…… (2)

**Calculation:
**

Substitute the value for and for in equation (2).

So, the tension in the rope will be .

**Learn more:
**

1. Type of mirror used by dentist: brainly.com/question/997618

2. Wind and solar energy: brainly.com/question/1062501

3. Motion under force brainly.com/question/9484203.

**Answer details:
**

**Grade:** High School

**Subject:** Physics

**Chapter:** Force

**Keywords:
**

Astronaut, climb a rope, tension in the rope, constant speed, acceleration, acceleration due to gravity, force, weight, mass, downward, upward, direction, motion.

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The calculation of the gravitational force between two objects

refers to the distance between their centers.

The minimum possible distance between the Earth’s and moon’s

centers is the sum of their radii (radiuses).

Earth’s radius . . . . . 6,360 km = 6.36 x 10⁶ meters

Moon’s radius . . . . . 1,738 km = 1.738 x 10⁶ meters

Sum of their radii = 8.098 x 10⁶ meters

Also:

Earth’s mass . . . . . 5.972 x 10²⁴ kg

Moon’s mass . . . . . 7.348 x 10²² kg

and now we’re ready to go !

Gravitational force =

G M₁ M₂ / R²

= (6.67 x 10⁻¹¹ N-m²/kg²)(5.972 x 10²⁴ kg)(7.348 x 10²² kg)/(8.098 x 10⁶ m)²

= (6.67 · 5.972 · 7.348 / 8.098²) · (10²³) Newtons

= (I get …) ** 4.463 x 10²³ Newtons**

That’s almost exactly 10²³ pounds

= 50,153,000,000,000,000,000 tons.

Those are big numbers.

All I can say is: I wouldn’t exactly call that “resting” on the surface”.

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