One of the challenges of tidal wave energy is the start-up costs are expensive. Because it needs materials that do not erode quickly and can withstand the pressure of the incoming waves. This is another form of a renewable source of energy.
Answer:
if your on odyssey the correct answer is A. the start-up costs are expensive.
Answer: The impulse delivered to the object is 33 N • s.
Explanation: Impulse = Change in momentum
The momentum of an object is calculated by multiplying its mass by its velocity:
Momentum = Mass x Velocity
Given:
Mass of the object = 1.5 kg
Initial velocity = +15 m/s
Final velocity = +22 m/s
Time interval = 3.5 seconds
First, we need to calculate the change in momentum:
Change in momentum = Final momentum - Initial momentum
To find the initial momentum, we multiply the mass by the initial velocity:
Initial momentum = Mass x Initial velocity
Initial momentum = 1.5 kg x 15 m/s
To find the final momentum, we multiply the mass by the final velocity:
Final momentum = Mass x Final velocity
Final momentum = 1.5 kg x 22 m/s
Now, we can calculate the change in momentum:
Change in momentum = Final momentum - Initial momentum
Change in momentum = (1.5 kg x 22 m/s) - (1.5 kg x 15 m/s)
Simplifying the equation:
Change in momentum = 33 kg m/s
Finally, we have found the change in momentum, which is equal to the impulse delivered to the object. Therefore, the impulse delivered to the object is 33 N • s.
Answer:
11 Ns
Explanation:
Impulse = change in momentum
J = Δp
J = mΔv
J = (1.5 kg) (22 m/s − 15 m/s)
J = 10.5 kg m/s
Rounded to two significant figures, the impulse is 11 Ns.
1.5 amps
7.5 amps
3.3 amps
The purpose of a fuse or circuit breaker is _____.
to speed up the current
to slow down the current
to stop current that is flowing too fast
to stop current that is flowing too slow
(1) The value of the current depends upon how they are connected.
When placed in series:
The resistance would be: 3+2=5ohms.
Ohm's law is given as:
⇒
When placed in parallel:
The resistance would be:
Now, the current would be:
(2) The purpose of a fuse or circuit breaker is to stop current that is flowing too fast.
A fuse is wire that have low melting point when placed in a circuit. When current is moving too fast i.e. in case of over current, the heat produced melts this wire which further breaks the circuit. Similarly a circuit breaker is a switch which opens up in case of over flow of current.
Thus, a circuit breaker is then used to to stop current that is flowing too fast.
No that other answer is not right they messed up and the right answer would be 0.3 I hope that this helps