Answer:
From 0 -4 seconds the acceleration is positive. (The graph is going upwards.)
From 6-10 seconds the acceleration is negative. (The graph is going downwards.)
Answer:
Therefore the terminal velocity = 1.45 m/s
Explanation:
Terminal velocity: Terminal velocity is the highest velocity of an object when it falls from rest trough a media.
= terminal velocity
w = weight of the object = mg
= drag coefficient=0.80
A= frontal area
= media density = 1.2 kg/m³
m = mass = 8 kg
g= acceleration due to gravity = 9.8 m/s²
Front area = length× breadth
= (18×47)cm²
=846 cm²
Therefore the terminal velocity
=1.45 m/s
Therefore the terminal velocity = 1.45 m/s
Answer:
Explanation:
Since the work done is same everywhere in the universe. Hence, the work done in jumping will be same for the person on moon and earth:
Answer: Microwaves.
Explanation: First, we have a trivial answer, and that is the visible light, which is responsible to let the information on the tv to be seen by the user.
Now, TV technology was possible thanks to the microwaves, that are used because these can carry more energy than other types, and these microwaves needed a special technology because they couldn't be handled by the current technology at the time.
Answer:
The energy transformations that occur is Mechanical → electrical → light.
Explanation:
- When the water falls through the dam the gravitational potential energy of water is transformed into kinetic energy.
- This energy rotates the turbine (mechanical energy) connected to a generator.
- Now this mechanical energy is converted into electrical form through the process of electromagnetic induction (when a conductor cuts the magnetic field, electricity is produced).
- The electricity thus produced is driven to different offices and houses through wires.
- By drawing this current we light our homes and offices.
