Answer:
OD) 3.7 kg-m/s
Explanation:
given:
velocity of baseball, v = 25 m/s
angle below horizontal, Θ =
mass of baseball, m = 0.15 kg
Generally, momentum (p) is given by equation:
p = mv
Horizontal component is given by
p = mv cosΘ
= 0.15 kg x 25 m/s x cos
= 3.71 kg- m/s
Hence horizontal component of momentum is OD) 3.7 kg-m/s
A. Bike A travels 2x or 2/1 and bike B travels 1/1
(I think this is right)
Answer:
Power = 2.45Kw or 2450 Watts.
Explanation:
<u>Given the following data;</u>
Mass, m = 250kg
Height, h = 2m
Time, t = 2secs
We know that acceleration due to gravity, g is equal to 9.8m/s²
Power can be defined as the energy required to do work per unit time.
Mathematically, it is given by the formula;
But Energy = mgh
Substituting into the equation, we have
Power = 2450 Watts
To convert to kilowatt (Kw), we would divide by 1000
Power = 2450/1000
Power = 2.45Kw.
Therefore, the average power output of the weightlifter is 2.45 Kilowatts.
Answer:C
Explanation:
Given
Total distance covered by car
First it travels with
then it travels with
time taken during first half
time taken during Second half
average speed
Answer:
After a nucleus with 85 protons undergoes alpha decay, it has 83 protons.
Explanation:
In an alpha particle there are two protons
In the given substance's nucleus, there are total of 85 protons
After the decay, the proton number reduce
The current proton number after decay is
85 -2 = 83
After a nucleus with 85 protons undergoes alpha decay, it has 83 protons.