Answer: The force needed is 140.22 Newtons.
Explanation:
The key assumption in this problem is that the acceleration is constant along the path of the barrel bringing the pellet from velocity 0 to 155 m/s. This means the velocity is linearly increasing in time.
The force exerted on the pellet is
F = m a
In order to calculate the acceleration, given the displacement d,
we will need to determine the time t it took for the pellet to make the distance through the barrel of 0.6m. That time can be determined using the average velocity of the pellet while traveling through the barrel. Since the velocity is a linear function of time, as mentioned above, the average is easy to calculate as:
This value can be used to determine the time for the pellet through the barrel:
Finally, we can use the above to calculate the force:
Explanation:
Current is measured in terms of Ampere abbreviated by (I)
Is the quantity of charge passing in given point in a circuit per unit time
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is The Virgin River<span> at the upper end of Zion Canyon. It will definitely help you! Regards.</span><span>
</span>
Answer:
Explanation:
Electrical energy is the correct answer
Answer:
a) 8 cents
b) 25.6 cents
c) 2.4 cents
Explanation:
Given:
Cost of electricity = 8 cents/kWh
Total cost = Wattage ×Time × Electricity cost
a) cost of running a lamp of 100 W for 10 h will be
Energy consumed = 100 W ×10 h = 1000 Wh or 1 kWh [1 kW = 1000 W]
Total cost = Energy consumed × electricity cost
⇒Total cost = 1 kWh × 8 cents/kWh = 8 cents
b) cost of running a TV of 400 W for 8 h will be
Energy consumed = 400 W × 8 h = 3200 Wh or 3.2 kWh
Total cost = Energy consumed × electricity cost
⇒Total cost = 3.2 kWh × 8 cents/kWh = 25.6 cents
c) cost of running a microwave of 1200 W for 15 min will be
Energy consumed = 1200 W × = 300 Wh or 0.3 kWh [1h = 60 min]
Total cost = Energy consumed × electricity cost
⇒Total cost = 0.3 kWh × 8 cents/kWh = 2.4 cents