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3 years ago

List of energy changes when hydroelectricity city is made

Physics

1 answer:

ryzh [129]3 years ago

8 0

Answer:

A turbine and generator produce the electricity

Explanation:

"A hydraulic turbine converts the energy of flowing water into mechanical energy. A hydroelectric generator converts this mechanical energy into electricity.

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Moment of inertia: A dumbbell-shaped object is composed by two equal masses, m, connected by a rod of negligible mass and length

LekaFEV [45]

Answer:

B.Less than

Explanation:

We are given that

Mass of each object=m

Length of rod=r

$I_1$ =Moment of inertia of the dumbbell shaped object with respect to an axis passing through the center of the rod and perpendicular to it.

$I_2$ =Moment of inertia with respect to an axis passing through one of the masses.

$I_1=\frac{mr^2}{4}+\frac{mr^2}{4}$

$I_1=\frac{2mr^2}{4}=\frac{1}{2}mr^2$

$I_2=mr^2$

$I_2>I_1$

Hence, $I_1$ is less than $I_2$

B.Less than

3 0

3 years ago

What safety factors should astronauts be aware of when collecting rock samples on the Moon?

Oksanka [162]

Answer:

Explanation:

Astronauts face a wide range of dangers when maneuvering in space. Collecting rock samples requires breaking apart rocks on the moon's surface, which requires tools. These tools are sometimes small hammers or other times special drills. All of this process means moving and using force to break these rocks apart and every single movement can cause a mistake which can lead to a piece of the suit ripping or a failure in the machinery. Since there is no oxygen on the moon the tiniest failure in the suit can lead to the death of the astronaut. Therefore, having backup safety precautions, and quick repair scenarios is a must when collecting rock samples on the moon.

8 0

3 years ago

A golfer tees off from the top of a rise, giving the golf ball an initial velocity of 44 m/s at an angle of 25° above the horizo

mars1129 [50]

Answer:

a) $y=17.6m$

b) $v_{x}=39.87m/s\\v_{y}=-28.05m/s$

Explanation:

From the exercise we got our initial data

$v_{o}=44m/s\\\beta =25\\x=190m$

a) To find maximum height we know that at that point $v_{y}=0$

$v_{y} ^{2} =v_{oy} ^{2} +2a(y-y_{o} )$

$0=(44sin25)^{2} -2(9.8)y$

Solving for y

$y=\frac{(44sin25)^{2} }{2(9.8)} =17.6 m/s$

b) Since we know that the ball strikes the fairway 190 m away

$x=v_{ox}t\\ 190=44cos25t$

Solving for t

$t=4.76s$

Now, we can calculate the speed of the ball in both axes

$v_{x}=44cos25=39.87m/s$

$v_{y}=v_{oy}+at$

$v_{y}=44sin25-(9.8)(4.76)=-28.05m/s$

The negative sign means the direction of the ball at that point.

5 0

4 years ago

What is the iv and the DV in a rocket

alekssr [168]

an independent variable (IV) that you can change. • Typical IV's might be number of fins, length of rocket, type of material, mass of the rocket. • Choose one dependent variable (DV) and make three launches per DV for each IV for a total of. six launches..

Explanation:

6 0

3 years ago

The Astronomer Carl Sagan is famous. Why?

Zolol [24]

Mainly because he was Johnny Carson's advisor and consultant
on space, astronomy, and science in general, and he appeared
on The Tonight Show Starring Johnny Carson many times.

6 0

3 years ago

List of energy changes when hydroelectricity city is made​

List of energy changes when hydroelectricity city is made