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salantis [7]
3 years ago
10

What causes an electric force?

Physics
1 answer:
Fantom [35]3 years ago
7 0

Answer:

Electric force results form mutual interactions between two charges.

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3. A child decides to keep his goldfish outside in a small bowl. He has to add water every day to keep
weeeeeb [17]
Humidity is 90 it will be hotter so the child has to add water to the goldfish bowl
5 0
3 years ago
Two trains on separate tracks move toward each other. Train 1 has a speed of 109 km/h; train 2, a speed of 99.0 km/h. Train 2 bl
Rufina [12.5K]

Answer:

f_o=592.36 Hz

Explanation:

Given that

Train 1 (observer):

Speed = 109 km/h

Train 2 (source):

Speed = 99 km/h

Train 2 emitting frequency = 500 Hz

We know that observer and source are moving toward each other, then frequency heard by observer can be given as follows

f_o=\left(\dfrac{C+V_o}{C-V_s}\right)f_s

Where C is the velocity of sound  (C=1225 Km/h)

Now by putting the values

f_o=\left(\dfrac{C+V_o}{C-V_s}\right)f_s

f_o=\left(\dfrac{1225+109}{1225-99}\right)\times 500

f_o=592.36 Hz

4 0
3 years ago
A Rocket took 5 minutes to travel the 185 km. How fast did the Rocket travel in kilometers per minute (km/min)?
Jet001 [13]

Answer:

The rocket travelled 37km per minute

Explanation:

185÷5=37

6 0
3 years ago
Why does the number of cooling fins effect the rate of energy transfer from a radiator?
baherus [9]
<span>The number of cooling fins effect increases the rate of energy transfer from a radiator. It is because the cooling fins have an enlarged area allows heat to be transferred into the area away from the object it needs to have less heat with. Thereby cooling the object with cooling fins.</span>
5 0
3 years ago
Layer T contains a well-known index fossil that is 120 million years old. Layer R contains a different index fossil that is 100
RSB [31]

Answer:

Between 100 and 120 million years old

Explanation:

The principle of superposition refers to one of the geological principles used in the determining the relative depositional history or sequence of rock stratas in geologic stratigraphic study. The superposition principle explains that rocks deposited in stratas with the oldest rock layer being at the base and the youngest at the topmost layer. Hence using this principle, we can conclude that ; Rock layer M lies in between layer T and R ; thus M is younger than T and older than R. Therefore, the age of M will be between the range of age T and R.

7 0
3 years ago
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