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professor190 [17]
3 years ago
14

What device is created with a battery, iron nail and coiled wire?

Physics
1 answer:
vivado [14]3 years ago
7 0
A closed circuit, an electromagnet, and a series circuit.
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Which of the following does not provide evidence that continents move?
kvasek [131]
I believe the answer is A.
7 0
4 years ago
A condition where warmer air lies above cooler air, limiting vertical circulation and trapping pollutants near the surface, is.
xxMikexx [17]

Answer: Temperature inversion

Explanation: Temperature inversion is a reverse of the normal temperature flow or distribution of the air,it usually causes temperature to rise as altitude increase towards the troposphere instead of reduction of temperature.

Temperature inversion is caused when warm,dense air flow above cold,less dense air. Temperature inversion is hazardous to man as it traps pollutants close to the Earth surface,this condition limits vertical circulation.

7 0
3 years ago
A 1.2 m long wave travels 11.2 m to a wall and back again in 4.0 s. What is
algol [13]

Answer:

   f = 4.67 Hz

Explanation:

We can approximate the wave as a traveling wave, therefore the speed of the wave is constant

          v = d / t

the total distance remember, in going to the wall and back is

          d = 2 11.2 = 22.4 me

we substitute

          v = 22.4 / 4.0

          v = 5.6 m / s

now we can use the relationship between the speed of the wave, its wavelength and u frequency

          v =λ f

          f = v /λ

          f = 5.6 / 1.2

          f = 4.67 Hz

3 0
3 years ago
what happens to the current across a circuit when the voltage is doubled while the resistance is held back ​
Lynna [10]

Since the current is inversely propotional to its resistance, when the voltage is doubled the current will be one-half

7 0
3 years ago
Read 2 more answers
Derive a general formula for projectile motion with the object launched at an angle
vagabundo [1.1K]

Answer:

  y = x tan θ - (g / 2v₀² cos² θ) x²

Explanation:

An equation is called a general formula that relates the position on the x-axis and the height on the body's axis.

Let's write the position on each axis

X axis. No acceleration

         x = v₀ₓ t

Y Axis.  There is the acceleration of gravity

        y = v_{oy} t - ½ g t²

Let's clear the time in the first equation and substitute in the second

       y = v₀ sin θ  (x / v₀ₓ) - ½ g (x / v₀ₓ)²

       y = v₀ sin θ / v₀ cos θ x - ½ g x² / v₀² cos² θ

       y = x tan θ - (g / 2v₀² cos² θ) x²

This is the trajectory equation in projectile launching

6 0
3 years ago
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