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IrinaVladis [17]
3 years ago
10

How much electrical energy is generated by hydroelectric power?

Physics
1 answer:
insens350 [35]3 years ago
6 0
Search it on google lolololololololo
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All ball is thrown up with a vertical velocity of 54 m/s and a horizontal velocity of 39 m/s. Calculate how many seconds it will
VikaD [51]

5.5 s

Explanation:

The time it takes for the ball to reach its maximum height can be calculated using

v_y = v_{0y} - gt \Rightarrow t = \dfrac{v_{0y}}{g}

since v_y = 0 at the top of its trajectory. Plugging in the numbers,

t = \dfrac{(54\:\text{m/s})}{(9.8\:\text{m/s}^2)} = 5.5\:\text{s}

8 0
3 years ago
TP-10 Which of the following is considered a safe refueling practice?
erik [133]

Answer:

The correct option is;

Sending all passengers below while refueling

Explanation:

Safety tips for refueling a boat includes;

1) People that are not involved in the refueling of the boat should be made to leave the area

2) The engines, electronics, ignition system and open flames should be off

3) Ensure the boat is properly secured to the dock

4) Do not use the hands-free clips and try not to be distracted

5) Ensure not to completely fill the fuel tank as fuel has the tendency to expand as its temperature rises. The tank should have about 90% filling

7 0
3 years ago
Suppose you're performing experiments in science class in which you start with 70 bacteria and the amount of bacteria triples ev
barxatty [35]
1h----------------> 70x3=210 bacteria
2h-----------------> 210*3=630 bactaeria
let be y the number of bacteria at the t=0h
it is y=70 3^0
for t= 1h
y=70*3^1=210
for t=2h
y=70*3^2=630

so we can write y=70*3^x, where x is the number of hour


5 0
4 years ago
Read 2 more answers
A 50.0-kg skater begins a spin with an angular speed of 4.0 rad/s. By changing the position of her arms, the skater decreases he
Pani-rosa [81]

Answer:

The Skater's final angular speed =8rad/s

Explanation:

Let initial momentum of inertia be I1

Let final momentum of inertia be I2

But I2= I1/2

It is decreased by one-half

There is no external torque on the system, therefore

I1w1=I2w2

I1×4=(I1/2)×w2

Dividing through by I1 on both sides leaves you with:

4=w2/2

Cross multiply

W2=4×2=8rad/s

4 0
4 years ago
How does collecting petroleum affect the environment?
Ray Of Light [21]
Transforming crude oil into petrochemicals release toxins into the atmosphere that are dangerous for humans and ecosystem health
3 0
4 years ago
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