Answer:
Part a)
Part c)
This mean the truck is decelerating and its speed is decreasing
Part e)
Part f)
Explanation:
Part a)
Speed of the truck is given as
as we know that
1 km = 1000 m
1 h = 3600 s
so we will have
Part c)
Average acceleration is given as
now we have
Part e)
as we know that it is uniform acceleration
so we can say
Part f)
distance traveled by the truck is given as
A budget is a guide that keeps you on the path to reach your financial goals. Budgeting keeps your finances under control, shows when you need to make adjustments to your spending, and helps you decide where your money goes instead of wondering where it all went.
Budgeting helps you answer these important questions:
Where does all my money go?
Is there a way to spend less?
How will I handle unexpected expenses like replacing a broken cell phone or repairing my car?
How can putting money into savings help me with some of my bigger financial goals?
Budgeting helps you achieve academic and financial goals.
Writing down your goals is the first step in creating a plan to make them realities. A budget will also help you prepare for unexpected expenses and obstacles. Budgeting involves challenging decision-making, but setting goals will make the tough choices a little easier.
As you create a budget, you’ll want to set short-, medium-, and long-term goals and track your progress toward achieving them.
Explanation:
You may know that electricity flows through wires. Wires are good conductors of electricity. Heat too can be transferred, or conducted, through some types of materials. The term conduction refers to the transfer of energy. Conduction occurs when energy is passed between objects.
The transfer of thermal energy is called heat. Particles of matter are in constant motion. Sometimes they collide with other particles. When they do, they transfer some of their energy. The energy is transferred from particle to particle. It is sort of like a row of dominoes falling over. In this process, thermal energy moves through a substance. It can even move into other nearby substances conduction occurs between particles of the metal in the pot. It also occurs between particles of the pot and the water. Figure below shows additional examples of conduction. Did you ever cook over a campfire? The man in Figure below is cooking his lunch. He waits as his food absorbs energy. First, the energy from the fire needs to heat the water. Soon, all the water in the pot will be boiling hot. The man also feels warm. He feels the heat from the flames. He feels the warmth even though he is not touching the flames. Thermal energy is transferred from the fire to his hands.
Answer:
<em>The total time is: t=451.22 sec</em>
<em>The average speed is: V=34.57 m/s</em>
Explanation:
<u>Average speed</u>
The average speed is calculated by dividing the total distance traveled by an object (x) by the total time it took it to travel that distance (t).
Since the student makes the trip in two parts, we have to calculate the total distance and the total time.
We know the distance to school is 7.8 Km = 7,800 m. The student makes his way home over the same distance, thus the total distance is
x=2*7,800 m=15,600 m
The first trip to school was done at an average speed of v1=32.6 m/s. Knowing the distance and speed, we can calculate the time:
The second trip back home was done at an average speed of v2=36.8 m/s. Let's calculate the second time:
The total time is:
The average speed is:
