500N
Explanation:
Given parameters:
Mass of skater = 50kg
Acceleration = 10m/s
Unknown:
Force = ?
Solution;
Force is a push or pull on a body. it is given as the product of mass and acceleration:
Force = mass x acceleration
Input the parameters:
Force = 50 x 10 = 500N
She hits the wall with a force of 500N
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<span>ΔT for the first sample is the total samples final temp, minus the first sample's initial temp (47.9-22.5), so 25.4oC.
Calculating q for the first sample as 108g x 4.18 J/g C x 25.4oC = 11466.58 Joules
Figuring that since the first sample gained heat, the second sample must have provided the heat, so doing the calculation for the second sample, I used
q=mCΔT
11466.58 Joules = 65.1g x 4.18 J / g C x ΔT
11466.58/(65.1gx4.18)=ΔT
ΔT=42.14oC
So, since second sample lost heat, it's initial temperature was 90.04oC (47.9oC final temperature of mixture + 42.14oC ΔT of second sample).</span>
Auto mechanics use them for both electric and hybrid cars, MRI technicians use them to look inside a patient's body when giving them an MRI scan, and robotic engineers use them also where the electromagnets power the motor and cause the robot to move.
Answer is Answer is E , using the right hand rule