1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
olya-2409 [2.1K]
3 years ago
11

Please help i really need it. this is my physic exam

Physics
2 answers:
erastova [34]3 years ago
7 0
Correct answer is C.
Harlamova29_29 [7]3 years ago
3 0

Answer:

bout=14.4V , b)R2=80

am i right

You might be interested in
When the resistance of a circuit is doubled, and no other changes occur, what effect does this have on this current in the circu
liraira [26]

As a result of doubled resistance, current will be halved.

As we know, Ohm's law inversely relates current and resistance to each other. The equation is as follows -

V = I*R, where V is voltage, I is current and R is resistance.

As the question mentions no change in any other parameter, let's assume I₁ and I₂ be initial and final current and R₁ and R₂ initial and final resistance.

So, R₂ will be 2R₁ as it is doubled.

Now, equating the values and finding out the value of final current.

I₁R₁ =  I₂R₂

Keep the value of R₂

I₁R₁ =  I₂2R₁

Cancelling R₁ as it is common on both sides of equation.

So, we get - I₁ =  2I₂

I₂ = I₁/2

Thus, as can be seen above, final current will be half of initial current.

Learn more about Ohm's law and relation between current, voltage and resistance -

brainly.com/question/796939

#SPJ4

3 0
2 years ago
how your weight would change with time if you were on a space ship traveling away from,earth toward the moon
Mkey [24]
U wouldn't get enough vitamins
4 0
3 years ago
What is the Galaxy we live in called?
Fittoniya [83]
The Milky Way is a spiral galaxy type so it has arms sort of like an octopus. We live in the Milky Way
7 0
3 years ago
Read 2 more answers
A boy weighs 40 kilograms. He runs at a velocity of 4 meters per second north. Which is his momentum?
Artist 52 [7]
The formula for momentum is mass times velocity. Simply, we just multiply the given values:
p = mv
p = 40 kg x 4 m/s
p = 160 kg m/s

Other units for momentum is N s.
p = 160 N s 
4 0
3 years ago
If you measure the amount of work accomplished in a particular time interval, u have measured-
serious [3.7K]

Answer:

The power

Explanation:

We know that the work definition is given by the following expression:

W = F * d

where:

F = force [Newtons] [N]

d = distance [meters] [m]

W = work [Joules]

And the expression that defines the work done by unit of time is called - <u>Power</u>, therefore:

P = W/t

where:

P = power [watts] [w]

W = work [Joules] [J]

t = time [seconds] [s]

6 0
3 years ago
Other questions:
  • Which tool can be used to measure the volume of a liquid to one decimal place?
    5·2 answers
  • Why do toasters always have a setting that burns the toast to a horrible crisp, which no decent human being would eat?
    13·2 answers
  • There are 2.2 pounds in a kilogram. If a boy's mass is 40 kg, what is his weight in pounds?
    11·2 answers
  • We have starin which is 0.4 and area is 0.05 what is sigma
    10·1 answer
  • Rex Things throws his mother's crystal vase upwards with an initial velocity of 26 m/s. Determine the time it would take for the
    10·1 answer
  • How the materials between a capacitors’ plates can change its capacitance
    14·1 answer
  • A 9.0 m long uniform rod with a weight of 8 N has 3 masses hanging from it; a 4N mass 1 meter from the left end, a 2 N mass 6 me
    8·1 answer
  • 7) A force of 500N exists between two identical point charges separated by a dis-
    8·2 answers
  • Two charges of magnitude ‒Q and +4Q are located as in the figure below. At which position (A, B,
    15·1 answer
  • PLEASE HELP ASAP I WILL GIVE YOU BRAINLEAST (15 POINTS)
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!