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Dmitry_Shevchenko [17]
3 years ago
14

The acceleration used for the height is 9.81 m/s2 because it is the acceleration due to gravity. (true or false)

Physics
1 answer:
Yuliya22 [10]3 years ago
4 0

Answer:

true

Explanation:

Gravity (or the acceleration due to gravity) is 9.81 meters per second squared, on the surface of Earth, because of the size of Earth and the distance we are on its surface from its center.

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What strongly affects the movement of the air masses along the earths surface
trapecia [35]
I think the answer is wind
5 0
4 years ago
Suppose you are standing on the center of a merry-go-round that is at rest. You are holding a spinning bicycle wheel over your h
ioda

Answer:

B. It begins to rotate counterclockwise

Explanation:

It can happen that the merry-go-round remains at rest in the case when the person is standing on the axle  of the merry go round whose axis is fixed to some rigid support, but here the person is standing at the center of the merry-go-round not at the axle hence the according to the conservation of angular momentum. Angular momentum is given as:

L=I.\omega

for the conservation of momentum

I.\omega=I'.\omega'

where:

I= moment of inertia of the merry-go-round

\omega= angular velocity of the merry-go-round

I'= moment of inertia of the bicycle wheel

\omega'= angular velocity of the wheel

As the person tries to stop the wheel which is rotating then the person feels an opposing force which tries to moves the whole system in its direction.

6 0
3 years ago
PHYSICS HELP PLEASE!! MUST SHOW MATH WORK!!
SVETLANKA909090 [29]

<u>Answer:</u>

1) Distance traveled by bird = 403 meter

2)Average speed = 1.66 km /hour

3) Zcceleration = 2 m/s^2

<u>Explanation:</u>

1)  Distance traveled = Speed * Time taken = 31 * 13 = 403 meter.

2)  Average speed = Total distance covered / Time taken for that distance to cover.

    Total distance covered = 2+0.5+2.5 = 5 km

    Time taken = 3 hours

     Average speed = 5/3 = 1.66 km /hour

3)    Acceleration is defined as the rate of change of velocity, so acceleration a = change in velocity/time.

  Change in velocity = 14 - 6 = 8 m/s

   Time = 4 seconds

   So acceleration = 8 / 4 = 2 m/s^2

6 0
3 years ago
How big is the planet earth​
AnnZ [28]

After doing some research on Wiki, Google, and Easyscienceforkids, I have come to a conclusion that:

Mass: 5.972 * 10^24 kg

Radius: 3958.8 mi

Distance from the sun: 92.96 million mi

6 0
3 years ago
In the Bohr model of the hydrogen atom, an electron moves in a circular path around a proton. The speed of the electron is appro
Alexxx [7]

Explanation:

It is given that,

Radius of the circular orbit, r=0.53\times 10^{-10}\ m  

Speed of the electron, v=2.2\times 10^6\ m/s

Mass of the electron, m=9.1\times 10^{-31}\ kg

(a) The force acting on the electron is centripetal force. Its formula is given by :

F=\dfrac{mv^2}{r}

F=\dfrac{9.1\times 10^{-31}\times (2.2\times 10^6)^2}{0.53\times 10^{-10}}  

F=8.31\times 10^{-8}\ N

(b) The centripetal acceleration of the electron is given by :

a=\dfrac{v^2}{r}

a=\dfrac{(2.2\times 10^6)^2}{0.53\times 10^{-10}}

a=9.13\times 10^{22}\ m/s^2

Hence, this is the required solution.

5 0
3 years ago
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