Answer:
Explanation:
a = (vf - vi) / t
a = (50 - 90) / 10.0
a = -4 km/h/s(1000 m/km / 3600 s/h) 
a = - 1.11 m/s²
 
        
             
        
        
        
The mass number of an isotope is the sum of the numbers of protons and the numbers of the neutron. Given that the mass number is 65 and the number of neutrons is 35, the number of protons is 30. The atom is then Zinc (Zn). The charge is equal to +2, as it lacks 2 more electrons. 
        
             
        
        
        
neutrons
Explanation:
Isotopes of an element differ in their number of neutrons. 
Isotopy is the existence of two or more atoms of the same element having the same atomic number but different mass numbers due to the differences in the  number of neutrons in their nucleus. 
- Isotopes of an element have the same electronic configuration. 
- They have the same chemical properties but differ in their masses. 
- The mass of an atom is function of the protons and neutrons. 
Learn more: 
Isotope brainly.com/question/2593342
#learnwithBrainly
 
        
             
        
        
        
Answer:
Flutter
Explanation:
Flutter is a type of arrhythmia that causes very fast and regular ryth of the atria of about 250 beats per minute.
Arrhythmia can be defined as any sort of irregularity heart rate or rhythm is also called as dysrhythmia. 
Arrhythmias can be categorized as heart block, bradycardia, tachycardia, fibrillation, flutter, sick sinus syndrome, and is diagnosed by Electrocardiography.
In Flutter, the heart chambers do get sufficient time to get filled with blood completely prior to next contraction.