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According to the law of conservation of energy, the potential energy is converted to kinetic energy. Remember, potential energy is calculated using height and weight. If the ball is on the ground, height is 0.
Answer:
Toasting in a toaster is usually considered by (infra red) radiation. But the hot coils touch the toast so an element of heating by conduction occurs as well.
Explanation:
Answer: The rising and setting of the Sun.
The appearance and disappearance of the Moon.
Changes in season.
Appearance and disappearance of the Stars.
Explanation: The rising and setting of the Sun helps can be used as a standard to determine time since the rissing and setting of the Sun occurs at similar time and interval in a given geographical ocation.
The appearance and disappearance of the Moon which occurs during the night and early hours of the morning is similar in a given geographical locationation so it can be used as a standard for Time.
Change in season is another natural phenomenon which occurs at similar times in a given geographical location like Winter/summer, rainy/dry etc can be used as standards for time.
The appearance and disappearance of the Stars can also b used as standards for time in a given geographical location.
Answer:
Electric force, F = 84.93 N
Explanation:
Given that,
Charge on particle 1, 
Charge on particle 1, 
The distance between charges, d = 8.09 cm
To find,
The magnitude of the force that one particle exerts on the other.
Solution,
The electric force of attraction or repulsion is given by the formula as:
k is the electrostatic constant
F = 84.93 N
So, the magnitude of the force that one particle exerts on the other is 84.93 N.
Answer:
Option C
Solution:
As per the question:
Velocity of the jet, v = 600 m/s
Acceleration, a = 4.0 g
Now,
To calculate the radius of curvature:
The necessary centripetal force on the jet is given by the force:
(1)
where
= centripetal force
where
m = mass of the jet
R = radius of curvature of the path
Using eqn (1):
Thus
where
g = acceleration due to gravity = 
R = 9183.67 m ≈ 9200 m
