C. crests. The wavelength is the distance between two specific parts of a wave. This might also be the trough.
Answer:
Acceleration, 
Explanation:
Given that,
Mass of a truck, m = 2000 kg
Force used to move the truck, F = 4200 N
We need to find the acceleration of the truck. The force acting on the truck is given by the expression as follows :
F = ma
a is the acceleration of the truck

So, the acceleration of the truck is
.
(A) power = 0.208 kW = 208 watts
(B) energy = 6.6 x 10^{9} joules
Explanation:
energy consumed per day = 5 kWh
(a) find the power consumed in a day
1 day = 24 hours
power = \frac{energy}{time}
power = \frac{5}{24}
power = 0.208 kW = 208 watts
(b) find the energy consumed in a year
assuming it is not a leap year and number of days = 365 days
1 year = 365 x 24 x 60 x 60 = 31,536,000 seconds
energy = power x time
energy = 208 x 31,536,000
energy = 6.6 x 10^{9} joules
Explanation:
Efficiency = work out / work in
e = 571 J / 1694 J
e = 0.337
Answer:
V=34.2 m/s
Explanation:
Given that
Height , h= 54 m
Horizontal distance , x = 35 m
Given that , the ball is thrown horizontally , therefore the initial vertical velocity will be zero.
In vertical direction :
We know that

Now by putting the values in the above equation we got


Assume 
Thus



We also know that



In horizontal direction :


Thus the resultant velocity


V=34.2 m/s
Therefore the velocity will be 34.2 m/s.