Answer:
A. 16.67 m/s
Explanation:
Speed or velocity refers to the rate of change in distance over a change in time. That is;
Speed = Distance ÷ time
Where;
Speed is in metre/seconds
Distance is in metre
Time is in seconds.
In this question, Steve throws a football 50 meters in 3 seconds. The average speed can be calculated this:
S = D/t
Where; d = 50m, t = 3s
S = 50/3
S = 16.6666666
S = 16.67m/s
Answer:
40,000N
Explanation:
Force = Acceleration × Mass
2000×20=40,000
Answer:
22500 Ns
Explanation:
Given,
Mass ( m ) = 1500 kg
Velocity ( v ) = 15 m/s
Formula : -
Impulse = mv
Impulse
= 1500 x 15
= 22500 Ns
Therefore,
22500 Ns is the impulse experienced by the car.
Note : -
Ns is the unit of impulse.
The reactivity of a nonmetal element in period 2 would be more violent than an element in period 4, as the size of the element and its ability to gain electrons would decrease as you go down the group in the table. Nonmetals want to form negative ions, as their weak valence shell allows them to gain electrons from other elements.
From the information gathered, the answer is '<span>The period 2 element would be more reactive because the attractive force of protons is stronger when electrons are attracted to a closer electron shell'. </span>
