Usain Bolt accelerates at a rate of 3.7

5 single loop of copper wire, lying flat in a plane, has an area of 8.60cm2 and a resistance of 3.00. A uniform magnetic field p

Finger [1]

Answer:

0.652 mA

Explanation:

According to Faraday's Law :

$Emf = - \frac{d \phi}{dt}$

$= \frac{- \delta \phi }{\delta \ t}$

$|E| = \frac{A ( \delta B)}{\delta t}$

where ;

A = $8.60*10^{-4}$

$\delta B = 3.00 T - 0.5 T = 2.5 T$

$|E| = \frac{8.60*10^{-4}*2.5}{1.10}$

$|E| = 1.96*10^{-3}$

Induced current I = $\frac{|E|}{R}$

= $\frac{1.96*10^{-3}}{3.0}$

= $6.52*10^{-4} A$

= 0.652 mA

Thus, the induced current in the loop of wire over this time = 0.652 A

4 0

3 years ago

A supersonic aircraft flies at 3 km altitude at a speed of 1000 m/s on a standard day. How long after passing directly above a g

Gre4nikov [31]

Answer:

<h3>After 3seconds</h3>

Explanation:

A supersonic aircraft flies at 3 km altitude at a speed of 1000 m/s on a standard day. How long after passing directly above a ground observer is the sound of the aircraft heard by the ground observer

Using the formula for calculating speed expressed as;

Speed = Distance/Time

Given;

Distance = 3km = 3000m

Speed = 1000m/s

Required

How long after passing directly above a ground observer is the sound of the aircraft heard by the ground observer (Time)

From the formula;

Time = Distance/speed

Time = 3000/1000

Time = 3seconds

Hence the sound of the aircraft is heard after 3 seconds

7 0

3 years ago

What does the doppler effect tell astronomers about the universe

Luden [163]

The doppler effect has red and blue shifts. A red shift means something is moving farther away, and a blue shift means it is moving closer. The universe has a red shift, and since a red shift means that it is moving farther away, this tells astronomers that the universe is still expanding.

7 0

3 years ago

Grain is pouring into a silo to be stored for later use. Due to the friction between pieces of grain as they rub against each ot

jolli1 [7]

Answer:

The electric force between them if the pieces of grain are 2 cm apart is $3.15\times 10^{-11}\textrm{ N}$ .