Answer:- 0.134 seconds
Solution:- The speed is given as 
and the circumference is 24900 miles which is same as the distance light have to covered. It asks to calculate the time required to cover this distance by the light.
We need to do unit conversion from miles to meter as the speed is given in meter per second.
1 mile = 1609.34 meter
So, 
= 40072566 meters
Know that, 
It's rearranged to time as, 
Let's plug in the values in it:
= 0.134 seconds
So, the light would take 0.134 seconds to travel the mentioned speed. The answer without the unit is 0.134.
Answer:
F' = 3 N
Explanation:
Given that,
Two objects of equal mass have a force of gravity of 6 N between them.
If the mass of one is cut in half and the other stays the same such that,
m₁' = m₁ and m₂' = (m₂/2)
We need to find the new force. The gravitational force between two objects is given by :
We have, F = 6 N
New force,
So, the new force becomes 3 N.
Purpose- state the problem
research- find out about the topic
hypothesis- predict the outcome of the problem
expiriment- develop a procedure to test the hypothesis
conclusions-compare the hypothesis t ok the outcome of the experiment
Answer:
1: Luis's train Traveled 100M per Second.
2: The swimmer's average speed was 3 meters per Second.
3: The average speed of the car is 4.58 m a second.
Explanation:
1: Divide 5000 by 50
2: Divide 300 by 100
3: Divide 550 by 120
Answer:-
A) 3.745
B) 2 x 10^-13 M
[H+]
pOH = 1.3
Explanation:-
A) From the question we see
The strength of HCl solution = 1.8 x 10^-4 M.
The M stands for molarity which is moles / Litre.
HCl is a monobasic acid. So the number of moles of Hydrogen ion H+ HCl can give is the same as the value of it’s strength in moles per litre.
The hydrogen ion concentration [H+] is therefore 1.8 x 10^-4.
The formula for pH is
pH = - log [ H+ ]
= - log [1.8 x 10^-4]
= 3.745
B) From the question we see
The strength of KOH = 0.05 M
The M stands for molarity which is moles / Litre.
KOH is a monoacidic base. So the number of moles of Hydroxyl ion OH- KOH can give is the same as the value of it’s strength in moles per litre.
The Hydroxyl ion concentration [OH-] is therefore 0.05
The relation between [OH-] and [H+] is
[H+] x [ OH-] = 10^-14
[H+] = 10^-14 / [OH-]
= 10^-14/ 0.05
= 2 x 10^-13 M
Using the relation between pH and [OH-]
pOH = - log [OH-]
= -log [0.05]
= 1.3
