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zhannawk [14.2K]

2 years ago

10

A student is investigating potential and kinetic energy by stretching a spring across a table when the student lets go the sprin

g recoils

1 answer:

nikitadnepr [17]2 years ago

7 0

Answer: could be B.

Explanation:

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If an electron moves in a circle of radius 21 cm perpendicular to a B field of 0.4 T, what are the speed of the electron and the

kodGreya [7K]

Answer:

a)

$v = 4.048 *10^6$ m/s

b)

Angular frequency = $1.92 * 10^7$

Explanation:

As we know

$v = \frac{qBr}{m}$

q is the charge on the electron = $3.2 * 10^{-19}$ C

B is the magnetic field in Tesla = $0.4$ T

r is the radius of the circle = $0.21$ m

mass of the electrons = $6.64 * 10^{-27}$ Kg

a)

Substituting the given values in above equation, we get -

$v = \frac{3.2 * 10^{-19}*0.4*0.21}{6.64 * 10^{-27}} \\v = 4.048 *10^6$ m/s

b)

Angular frequency =

$\frac{4.048 * 10^6 }{0.21} \\1.92 * 10^7$

8 0

2 years ago

True or false. The Ohm's Law equation includes calculations using volts, current, and couloms.

Iteru [2.4K]

Answer:false

Explanation:

Ohms law:

Potential difference (volts)=current(ampere)×resistance(ohms)

Coulombs is a unit for quantity of Charges and it is not in ohms law

6 0

3 years ago

What type of soil is found around Pennsylvania riverbanks and consists of particles smaller than sand

PSYCHO15rus [73]

Answer:

Monongahela silt loam

Explanation:

Monongahela silt loam

its obvious

3 0

2 years ago

Which of the following can be caused by lightning or arson?

Amiraneli [1.4K]

Answer:

Wildfires

Explanation:

because wood is in the forst

7 0

2 years ago

Read 2 more answers

At what frequency does the driver of the car hear the ambulance’s siren? The velocity of sound in air is 343 m/s.

Katarina [22]

956.602hz.

Sorry for the late answer, just came across this.

4 0

3 years ago