Hi there!
Use the following equation to solve:
F = ma, where:
F = Force (N)
m = mass (kg)
a = acceleration (m/s²)
Thus:
15 = 5m
15/5 = m
mass = 3 kg
Using a=f/m u get 100 bc 5/.05 =100m/s
Answer:
<h2> $1.50</h2>
Explanation:
Given data
power P= 2 kW
time t= 15 min to hours = 15/60= 1/4 h
cost of power consumption per kWh= 10 cent = $0.1
We are expected to compute the cost of operating the heater for 30 days
but let us computer the energy consumption for one day
Energy of heater for one day= 2* 1/4 = 0.5 kWh
the cost of operating the heater for 30 days= 0.5*0.1*30= $1.50
<u><em>Hence it will cost $1.50 for 30 days operation</em></u>
This problem illustrate an airplane which is decelerating, since it tells us about a braking force, this type of acceleration is opposite in direction or simply a "deceleration" of the aircraft. The given are mass m=3.55 x 10⁵ Kg. The net braking Force f=-4.05 x 10⁵ N or Newton. The formula for the force is equivalent to F=ma. therefore a=f/m or force divided by the mass. This braking force is acting in opposite direction therefore having a negative sign. The answer will be negative in sign reminding us that it is a form of "deceleration". The unit should be in m/s².
To solve this problem we will start by defining the relationship of the pitot tube and the value indicated in the pressure. We will take advantage of this relationship to obtain a ratio between the defined pressures and proceed to calculate the total and static pressure of the system through the correlation of pressure in isotropic systems. Finally we will perform this same procedure for pressure. Pitot tube measure the total pressure minus static pressure, then
Express the total pressure and static pressure ratio
Hence the static pressure is 400.4kPa
Express stagnation to static temperature ratio,
Therefore the stagnation temperature is 316.224K