Answer:
3. both are true.
Explanation:
Energy increses with decrease in wavelenght.
For photoemission to occur, a threshold energy barrier must be broken.
Higher energy means more electrons will be emmited.
The electrons emmited will posses energy that is less than the incident energy by the value of the threshold energy.
So the higher the energy, the higher the energy possessed by the electrons.
Newtons 1st law of motion states that the object will continue to move at its present speed and direction until an outside force acts upon it.
So unless the objects inside the car are restrained, they will continue moving at whatever speed the car is traveling at, even if the car is stopped by a crash.
Answer:
egrfeirugherhgourehgabgwehgoehborghrewuhgelkg
Explanation:
Force=mass x acceleration
f= 0.5 x40
f=20N
Answer a would be correct since velocity is a vector and has a magnitude and a direction. In this case v₁ = - v₂.
