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3 years ago

HELP PLEASE I NEED AN A FOR THIS TO PASS

Physics

1 answer:

inessss [21]3 years ago

4 0

Answer:

D: The velocity increases during the time periods labeled A and C

Explanation:

Since gravity pulls us down to Earth, it will pull down the ball faster when the ball is falling.

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A battery with an emf of 24.0 V is connected to a resistive load. If the terminal voltage of the battery is 16.1 V and the curre

lions [1.4K]

Answer:

2.03 Ω

Explanation:

EMF: This can be defined as the potential difference of a cell when it is not delivering any current. The S.I unit of Emf is Volt.

The formula of emf is given as,

E = I(R+r)............................ Equation 1

Where E = Emf, I = current, R = External resistance, r = internal resistance.

Make r the subject of the equation

r = (E-IR)/I........................ Equation 2

Note: From ohm's law, V = IR.

r = (E-V)/I........................ Equation 3

Where V = Terminal voltage

Given: E = 24 V, I = 3.9 A, V = 16.1 V.

Substitute into equation 3

r = (24-16.1)/3.9

r = 7.9/3.9

r = 2.03 Ω

6 0

3 years ago

Draw on a piece of paper the uniform magnetic field directed out of a page, it means towards you. Magnetic field is uniform in s

Papessa [141]

Answer:

A. Counterclockwise

Explanation:

Electric fields can be created in vacuum space by variable magnetic fields. If we focus in the Lenz's law we have

$\int Edl=-\frac{d\Phi_{B}}{dt}$

and by taking into account the right hand rule we deduce the direction of the circulation of the field

I hope this is useful for you

regards

3 0

3 years ago

Solve for the dog's displacement during segments A and B (0-20s)?

Katena32 [7]

The dog walked 5 meters backwards in the first 10 seconds, then 5 meters forward from 10-20 seconds. After 20 sec he was back where he started. Displacement (20sec) = zero.

5 0

3 years ago

Read 2 more answers

A train A travelled a distance of 150 km in 3 hours, whereas, train 'B"

ozzi

Answer:

Therefore, Train A is faster with 50km/h and a 5km/h difference

Explanation:

train A

150km/3h = 50km/h

train B

180km/4h = 45km/h

8 0

3 years ago

What percent of all. Bolts fire within a cloud

cricket20 [7]

more than 90%

hope this helps :)

6 0

4 years ago