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MariettaO [177]
3 years ago
7

True or false question scientists can predict when an earthquake will occur

Physics
1 answer:
Tanya [424]3 years ago
6 0

Answer:

False

Explanation:

Neither the USGS nor any other scientists have ever predicted a major earthquake. USGS scientists can only calculate the probability that a significant earthquake will occur in a specific area within a certain number of years.

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Could anyone help me on the questions of the Series Circuits please!!!! (The picture is attached)
strojnjashka [21]
Series circuits - cpt connected so that the same current passes through each of them. 
Disconnection/break in series circuit and current doesn't flow.
Current same 
The total potential difference across all of the components. (the sum of the pds across the individual series elements).

The diagram in the enclosure seems to show resistors in parallel. Which is a bit confusing ...

6 0
3 years ago
Help with Number 4 plz <3
vitfil [10]
Nevermind that one i dont know sorry 

8 0
4 years ago
You get home on a cold winter day and turn on the hea
Allushta [10]

The heat transferred by room heater to the room is an example of convection heat flow.

Answer: Option D

<u>Explanation:</u>

It is known that heat or thermal energy generally flows from high temperature to low temperature. Heat can be transferred in four ways. They are conduction, convection, radiation and electro-magnetic waves. So, in the present case, if we are turning on the heater highers the temperature of the room, we need to use room heaters. And generally room heaters utilize convection technology to flow the heat energy.

In convection mode of heat flow, the heat energy generated at the source i.e., in the coils of the room heater is made to flow away from the source using the fan or radiator kind of thing. So, this process of transfer of heat energy from the point of generation by making the heat flow or rise is termed as convection. And thus, convection is the best example which is used in room heater.

4 0
4 years ago
A small styrofoam ball with a layer of metallic coating is lowered into the gap between two large metal plates. A large potentia
Brut [27]

Answer:

ball will oscillate in between the plates

Explanation:

The metallic coated styrofoam lowered in between two large metal plates, a large potential difference V is kept between the two plates, will experience a force of repulsion ( because both plates and balls will have similar kind of charges and like charges repel each other)  from the opposite plates.

If we consider d as the distance between the plates, E as electric field because of Potential difference V. Then force F experience by the ball will be

F= \frac{qV}{d}

where q be the total charge on the metallic coated ball.

clearly,  since, both the plates will repel the ball in opposite directions, hence ball will be in oscillate in between the plates.

3 0
4 years ago
You are testing a new amusement park roller coaster with an empty car with a mass of 130 kg. One part of the track is a vertical
vlada-n [284]

Answer:

Work done by friction along the motion is given as

W_f = -5857.8 J

Explanation:

As per work energy theorem we can say

Work done by all forces = change in kinetic energy of the system

so here car is moving from bottom to top

so here the change in kinetic energy is total work done on the car

so here we will have

W_f + W_g = \frac{1}{2}m(v_f^2 - v_i^2)

W_f - mgH = \frac{1}{2}m(v_f^2 - v_i^2)

now plug in all data in it

W_f - (130)(9.81)(2\times 12) = \frac{1}{2}(130)(8^2 - 25^2)

W_f = 30607.2 - 36465

W_f = -5857.8 J

6 0
3 years ago
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