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SVEN [57.7K]
3 years ago
5

Keisha writes that if an object has any external forces acting on it, then the object can be in dynamic equilibrium but not

Physics
1 answer:
Westkost [7]3 years ago
8 0

Answer:

An object in either state of equilibrium must have no net force acting on it.

Explanation:

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The 2 substances in the containers below were heated to 50 degrees Celsius; then left to cool to room Temp of 20 degrees Celsius
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2 years ago
Write the dimension of a / b in the x = at + bt2. Where x is the distance and t is the time?​
Luba_88 [7]

The dimension of a/b where x is the distance and t is the time is T

Given the expression

x = at + bt²

where

x is the distance

t is the time

Based on the homogeneity principle, the expression on the left-hand side must be equal to that on the right. Hence;

x = at

a = \frac{x}{t}

Since x is the distance and distance is measured in metres, the dimension equivalent will be the length 'L'

Since t is the time and time is measured in seconds, the dimension equivalent will be the seconds 'T'

a=\frac{L}{T}

Similarly;

x  = bt²

b=\frac{x}{t^2}\\b=\frac{L}{T^2}

Next is to get a/b;

\frac{a}{b} =  \frac{L}{T} \div \frac{L}{T^2}\\\frac{a}{b} = \frac{L}{T}*\frac{T^2}{L}  \\\frac{a}{b} =\frac{T^2}{T}\\\frac{a}{b} =T

Hence the dimension of a/b is T

4 0
3 years ago
Why are we seeing extremely old light from Canopus instead of light in real-time?
Irina-Kira [14]

Answer:

Canopus is more than 300 light years away from earth. This means it takes the light we see more than 300 years to reach us.

8 0
3 years ago
A car tire rotates at a constant angular velocity of 3.5 rotations during a time interval of 0.75 seconds. What is the angular s
Andru [333]

Answer : \theta = 2.625\ radians

Explanation :  

Given that,

Angular velocity \omega = 3.5\ rad/s

Time t = 0.75 s

We know , the formula of angular velocity

\omega = \dfrac{\theta}{t}

\theta = \omega \times t

\theta = 3.5\ rad/s\times0.75\ s

The angular speed of the tire is

\theta = 2.625\ radians

Hence, this is the required solution.



4 0
3 years ago
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