Answer:
6.78571 m/s
55.13387 Joules
Explanation:
= Velocity of squid = 2.5 m/s
= Velocity of water
= Mass of water = 1.75 kg
Mass of squid
Momentum of squid
As the momentum of the system is conserved
The speed of the water is 6.78571 m/s
Kinetic energy the squid creates is given by
Kinetic energy of the squid + Kinetic energy of water
Kinetic energy the squid creates by this maneuver is 55.13387 Joules
Kepler's third law is used to determine the relationship between the orbital period of a planet and the radius of the planet.
The distance of the earth from the sun is .
<h3>
What is Kepler's third law?</h3>
Kepler's Third Law states that the square of the orbital period of a planet is directly proportional to the cube of the radius of their orbits. It means that the period for a planet to orbit the Sun increases rapidly with the radius of its orbit.
Given that Mars’s orbital period T is 687 days, and Mars’s distance from the Sun R is 2.279 × 10^11 m.
By using Kepler's third law, this can be written as,
Substituting the values, we get the value of constant k for mars.
The value of constant k is the same for Earth as well, also we know that the orbital period for Earth is 365 days. So the R is calculated as given below.
Hence we can conclude that the distance of the earth from the sun is .
To know more about Kepler's third law, follow the link given below.
brainly.com/question/7783290.
The kinetic energy of flywheel of a stationary engine is 120J.
<u>Explanation:</u>
Key Terms:
- torque: A rotational or twisting effect of a force; (SI unit newton-meter or N m; imperial unit foot-pound or ft-lb)
- inertia: The property of a body that resists any change to its uniform motion; equivalent to its mass.
- angular velocity: A vector quantity describing an object in circular motion; its magnitude is equal to the speed of the particle and the direction is perpendicular to the plane of its circular motion.
Here , angular acceleration = 2
Angular velocity w = Angular acceleration × time
∵ Acceleration is 2 rad per second sq. So , time is 1 sec.
⇒ Angular velocity (w) =
⇒ Angular velocity (w) =
Now, kinetic energy ⇒
⇒
⇒
⇒
∴ The kinetic energy of flywheel of a stationary engine is 120J.
D= 2.9 g/ml
M= 1500 g
V= .52 L
Answer:
A positive charge experiences a force in the direction of an electric field.
Explanation:
Electric field is defined as the electric force acting per unit positive charge. Mathematically, it is given by :
We know that like charges repel each other while unlike charges attract each other. The direction of electric field is in the direction of electric force. For a positive charge the field lines are outwards and for a negative charge the electric field lines are inwards.
So, the correct option is (b) "A positive charge experiences a force in the direction of an electric field".