The hand saw would involve more work because it takes more time and effort. 
        
             
        
        
        
Answer:
Acceleration will be 
Explanation:
We have given initial speed of the car is 70 km/hr
We know that 1 km = 1000 m 
And 1 hour = 3600 sec
So 
It is given that car stops in 12 sec 
So final speed of the car v = 0 m/sec
Time t = 12 sec
From first equation of motion v = u+at
So 
 ( negative sign indicates that speed of the car will constantly decrease )
 ( negative sign indicates that speed of the car will constantly decrease )
 
        
                    
             
        
        
        
Answer:
Shawn's speed relative to Susan's speed = 10 mph
Resultant velocity = 82.32 mph
Explanation:
The given data :-
i) Susan driving in north and speed of Susan is ( v₁ ) = 53 mph.
ii) Shawn driving in east and speed of Shawn is ( v₂ ) = 63 mph.
iii) The speed of both Susan and Shawn is relative to earth.
iv) The angle between Susan in north and Shawn in east is 90°.
We have to find Shawn's speed relative to Susan's speed.
v₂₁ = v₂ - v₁   = 63 - 53 = 10 mph
Resultant velocity,

v = 82.32 mph
 
        
             
        
        
        
Answer:
The fuse must be connected between the device and the power intake source. 
Explanation:
A fuse is a protective component of electrical appliances that is designed to be sensitive to a particular range of electric current 
The fuse is made of a thing metal strip with a known melting point. Once current abive its carrying capacity flows through it, large heat is generated in the metal strip which melts it and causes the metal strip to cut int two protecting the device from the power spike. 
 
        
             
        
        
        
In the test, it is observed that water that is not too deep If carbon dioxide levels are not low enough, blackout causes elevation.
<h3>What is research?</h3>
Unique and methodical activity performed to improve the reservoir of knowledge is known as the research. . A research project might be a continuation of previous work in the topic.
By the following way, the test is conducted;
1. The effect of the conversation test on exercise intensity prescription and monitoring in competitive athletes. The sound of your breath might assist you figure out what's wrong.
Athletes require oxygen to give energy and to eliminate carbon dioxide, which is a waste product produced when energy is produced.Because it is a reliable indicator of ventilatory efficiency in cardiac patients.
Ventilatory threshold performance is used to determine the lactate threshold. The maximal rate of oxygen consumption recorded during activity is 5.VO2 max. It is higher in trained people than in unskilled people.
Hence,in the test it is observed that water that is not too deep If carbon dioxide levels are not low enough, blackout causes elevation.
To learn more about the research, refer to the link;
brainly.com/question/18723483
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