Answer:
Joe & Bo's car: 200.0 kg + 100.0 kg = 300.0 kg; Melinda's car: 25.0 kg + 100.0 kg = 125.0 kg
so the answer is 125.0kg
Answer:
Wavelength, 
Explanation:
It is given that,
Velocity of an electron, 
Mass of an electron, 
We need to find the wavelength of an electron. It can be calculated using the De- Broglie wavelength as :



So, the wavelength of an electron is
. Hence, this is the required solution.