Answer:
10 ms⁻¹
Explanation:
The amount of momentum that an object has is dependent upon two factors
- mass of the moving object
- speed of motion
In terms of an equation,
Momentum (P) = Mass(m)×velocity(v)
P = m×v
600 = 60 × v ⇒ v = 10 ms⁻¹
Answer:
221.17 kJ
Explanation: Note the heat of vaporization is in kJ/mol,then to determine the number of moles of water: divide the mass by 18. Then multiply the number of moles by the molar heat of vaporization of water.
N = 97.6 ÷ 18
Q=molar heat *moles
Q = (40.79) * (97.6 ÷ 18)
This is approximately 221.17 kJ
Answer:
The number of turns in the secondary coil is 4145 turns
Explanation:
Given;
the induced emf on the primary coil,
= 95 V
the induced emf on the secondary coil,
= 875 V
the number of turns in the primary coil,
= 450 turns
the number of turns in the secondary coil,
= ?
The number of turns in the secondary coil is calculated as;
![\frac{N_p}{N_s} = \frac{E_p}{E_s}](https://tex.z-dn.net/?f=%5Cfrac%7BN_p%7D%7BN_s%7D%20%3D%20%5Cfrac%7BE_p%7D%7BE_s%7D)
![N_s = \frac{N_pE_s}{E_p} \\\\N_s = \frac{450*875}{95} \\\\N_s = 4145 \ turns](https://tex.z-dn.net/?f=N_s%20%3D%20%5Cfrac%7BN_pE_s%7D%7BE_p%7D%20%5C%5C%5C%5CN_s%20%3D%20%5Cfrac%7B450%2A875%7D%7B95%7D%20%5C%5C%5C%5CN_s%20%3D%204145%20%5C%20turns)
Therefore, the number of turns in the secondary coil is 4145 turns.
One of Kepler's laws is that the orbits of planets are elliptical. It's not a suggestion.
BTW, circles are ellipses too, but so special that their likelihood is close to zero.
The talk test can be used to measure the <u>intensity of an activity</u>
<u>Option: B</u>
<u>Explanation:</u>
The talk test is usually used to measure the intensity of a particular activity when a person talks during that activity. This is mostly used in cardiovascular patients to measure the intensity of the exercise.
For example, when a person can talk during exercising, it means that he is able to use the oxygen to create energy for the muscles. i.e he will be in aerobic state. Incase, he is not able to talk any more during his exercise, it means that the breathing rate has reached a particular ventilatory threshold.
So now the body is creating energy from the stored system such as muscle glucose and creatine. Thus this talk test helps to determine in which way your body creates energy, aerobic or non aerobic.