Answer:
40 000 units of momentum
Explanation:
Assuming that the mass is doubled and the velocity stays constant the new momentum will be doubled the original momentum.
<h3><u>Answer;</u></h3>
D. Longitudinal waves
<h3><u>Explanation;</u></h3>
- A wave is a transmission of a disturbance from one point to another. It involves the transmission of energy from a source to other points.
- <em><u>Waves may classified as longitudinal waves or transverse waves depending on the vibration of particles relative to the wave motion.</u></em>
- <em><u>Longitudinal waves are waves in which the vibration of particles is parallel to the direction of the wave motion, while transverse wave are types of waves in which the vibration of particles is perpendicular to the wave motion.</u></em>
- Longitudinal waves creates regions of compressions and rarefactions, while transverse waves creates regions of maximum displacement called crests and troughs
Answer: An electric circuit is a representation of how current moves from the source of the current( example a battery or a cell) through resistors and other devices before entering the source.
Explanation:
The two important types of electrical circuit includes:
--> open circuit and
--> closed circuit.
A circuit is said to be open when the electrical source, such as the battery or the cell, is not connected to any external conductor (or resistance). In this situation, any voltmeter connected across the terminal of the cell measures the total driving force of the cell.
In this type of circuit, current cannot flow from one end of power source to the other due to interruptions.
A circuit is said to be closed if the source of electricity is connected to an external conductor through which current is passed.
In a closed circuit, there is complete electrical connection which allows current to flow or circulate. Here, part of the total driving force of the source is used to drive current through the external resistance and the difference is used to overcome the internal resistance of the battery.
Answer:
Explanation:
Let T be the tension
For linear motion of hoop downwards
mg -T = ma , m is mass of the hoop . a is linear acceleration of CG of hoop .
For rotational motion of hoop
Torque by tension
T x R , R is radius of hoop.
Angular acceleration be α,
Linear acceleration a = α R
So TR = I α
= I a / R
a = TR² / I
Putting this value in earlier relation
mg -T = m TR² / I
mg = T ( 1 + m R² / I )
T = mg / ( 1 + m R² / I )
mg / ( 1 + R² / k² )
Tension is less than mg or weight because denominator of the expression is more than 1.
Answer:
Explanation:
Cutting a string in half because
b is irreversible
c is a cheical and d is also a chemical change
