Calculate the time it takes for sunlight to reach Earth if it travels at 300,000 km / s, knowing that the distance from the sun to the earth is 150,000,000 km. Express it in minutes
Answer:
8.3min
Explanation:
Given parameters:
Speed of sunlight = 300000km/s
Distance of sun and earth = 150000000km
Unknown:
Time in minutes = ?
Solution:
To solve this problem;
Speed = 
Time = 
Now insert the parameters and find the speed;
Time = 
= 500s
Now;
60s makes 1 minute
500s will give 
= 8.3min
Answer: Probably at-least 30 mins to an hour
The magnitude of the Earth's acceleration is 
Explanation:
First of all, we start by calculating the magnitude of the force exerted by the apple on the Earth. According to Newton's third law, this is equal to the force exerted by the Earth on the apple, which is the weight of the apple, given by:
where
m = 0.43 kg is the mass of the apple
is the acceleration of gravity
Substituting,
Now we can find the Earth's acceleration by applying Newton's second law:
where:
F = 4.2 N is the net force exerted by the apple on the Earth
is the mass of the Earth
a is the Earth's acceleration
And solving for a, we find:
Learn more about Newton laws of motion:
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Using momentum balance:
The 588 N mother is on the other side of the seesaw, 2.20m away from the pivot
F1 = 588 N
x1 = 2.20 m
Two of her children sat on the other side:
F2 = 256 N
x2 = 2.00 m
F3 = 412 N
x3 = unknown
F1x1 = F2x2 + F3x3
Solve for x3:
588 * 2.2 = 256 * 2 + 412 * x3
x3 = 1.90 meters away from pivot
In an exothermic reaction, there is a transfer of energy to the surroundings in the form of heat energy. The surroundings of the reaction will experience an increase in temperature. Many types of chemical reactions are exothermic, including combustion reactions, respiration & neutralization reactions of bases & acids.
