Answer:
<em>it</em><em> </em><em>takes</em><em> </em><em>2</em><em>.</em><em>1</em><em>6</em><em> </em><em>hrs</em><em> </em><em>to</em><em> </em><em>fully</em><em> </em><em>charge</em><em> </em><em>the</em><em> </em><em>phone</em>
Explanation:
V = 5v
I = 1A
E = 38.9 Kj = 38900 j
t = ?
E = IVt
t = E/IV
t = 38900 ÷ (1 × 5)
t = 38900 ÷ 5
t = 7780 seconds
t = 7780/3600............( converting time in seconds to hours)
t = 2.16 hrs
Answer:B
Explanation:
Given
mass of Sled is m
another package of mass m is thrown on it
Suppose u be the initial velocity of sled
conserving momentum


where v is the final velocity
Initial kinetic energy 
Final Kinetic Energy
Final Kinetic Energy
Final kinetic Energy is half of initial
Answer:
The concentration of acetic acid present in the vinegar is 0.113M
Explanation:
1. As the titration occurs between an acid and a base is called neutralization. The balanced chemical reaction between the acetic acid and the NaOH is:

2. Calculate the moles of NaOH used, taking in account the concentration of NaOH 1.00M:

3. Calculate the number of moles of acetic acid neutralized using stoichiometry:

4. Calculate the concentration of acetic acid present in the vinegar:

None of above/D (but I'm not very sure)
3 because opposites attract