Marshmallow
When you it in water it float but the brick sinks
This is because marshmallow are sugar which is simple molecules combined by van set waals force
The brick is a giant ionic structure which adopts ionic bond the molecules are packed more closed
Answer:
D. 100 cm
Explanation:
The speed of a wave is the wavelength times the frequency.
v = λf
Wave A and B have the same speed, so:
λf = λf
(50 cm) (7000 Hz) = λ (3500 Hz)
λ = 100 cm
Answer:
Current will decrease.
Explanation:
When we increase the number of stepping in transformer, the voltage will increase as its is directly proportional to the number of turn of stepping. Thus as the voltage will increase, current will decrease. As per the equation of ideal transformer, E1 / E2 = I2 / I1
E1 and E2 are the voltages in primary and secondary winding and I1 and I2 are the current.
As the number of turns will be increased more inevitable losses will be generated that dissipates heat thus warming the primary.
Though the conservation of energy is obeyed but losses occur in this scenario hence step-up transformers cannot be used to create free energy.
Answer:
1) is equal to, 2) is equal to, connected and moving along the same track.
Explanation:
1) The speed of the small engine car <em>is equal to</em> the speed of the massive cargo car.
2) The magnitude of the acceleration of the small engine car <em>is equal to</em> the magnitude of the acceleration of massive cargo car because they are <em>connected and moving along the same track</em>.
Answer:
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