answer.
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
Dmitry_Shevchenko [17]
2 years ago
7

A 1.5 volt, AAA cell supplies 750 milliamperes of current through a flashlight bulb for 5.0 minutes, while a 1.5 volt, C cell su

pplies 750 milliamperes of current through the same flashlight bulb for 20 minutes. Compared to the total charge transferred by the AAA cell through the bulb, the total charge transferred by the C cell through the bulb is
A) half as great

B) twice as great

C) the same

D) four times as great

Why??
Physics
1 answer:
likoan [24]2 years ago
7 0

Answer:

D) four times as great

Explanation:

The current through a circuit or device is given by the formula:

I = q/t

q = (I)(t)

where,

I = current

q = charge

t = time

<u>FOR AAA CELL</u>:

I = 750 mA = 0.75 A

t = 5 min = (5)(60) sec = 300 sec

q = q₁

Therefore,

q₁ = (0.75 A)(300 sec)

q₁ = 225 Coulomb

<u></u>

<u>FOR C CELL</u>:

I = 750 mA = 0.75 A

t = 20 min = (20)(60) sec = 1200 sec

q = q₂

Therefore,

q₂ = (0.75 A)(1200 sec)

q₂ = 900 Coulomb

Thus, from the values of charges for both cells, it is clear that, Compared to the total charge transferred by the AAA cell through the bulb, the total charge transferred by the C cell through the bulb is:

<u>D) four times as great</u>

You might be interested in
A carousel - a horizontal rotating platform - of radius r is initially at rest, and then begins to accelerate constantly until i
OLga [1]

Answer:

α = (ω²)/8π

Explanation:

The angular acceleration(α) of the carousel can be determined by using rotational kinematics:

ω² =ωo² + 2αθ

Let's make α the subject of this equation ;

ω² - ωo² = 2αθ

α = (ω² −ωo²)/2θ

Now, from the question, since initially at rest, thus, ωo = 0

Also,since 2 revolutions, thus, θ = 2 x 2π = 4π since one revolution is 2π

Plugging in the relevant values to get ;

α = (ω²)/2(4π)

α = (ω²)/8π

7 0
2 years ago
In the lab setup above, block 1 is being pulled across a smooth surface by a light string connected across a pulley to a falling
Nuetrik [128]

Answer:

As block 1 moves from point A to point B, the work done by gravity on block 2 is equal to the change in the kinetic energy of the two-block system.

Explanation:

As block 2 goes down , work is done by gravity on block 2 . This is converted

into kinetic energy of block 1 and block 2 . Work done by gravity is mgh which can be measured easily . kinetic energy of both the blocks can also be measured.  

8 0
2 years ago
A pump lifts water from a lake to a large tank 20 m above the lake. How much work against gravity does the pump do as it transfe
Aleonysh [2.5K]

Answer:

980 kJ

Explanation:

Work = change in energy

W = mgh

W = (1000 kg/m³ × 5.0 m³) (9.8 m/s²) (20 m)

W = 980,000 J

W = 980 kJ

The pump does 980 kJ of work.

3 0
2 years ago
Read 2 more answers
Which of the following statements best describes the characteristic of the restoring force in the spring-mass system described i
Grace [21]

Answer : The restoring force is directly proportional to the displacement of the block.

Explanation :

Restoring force is defined as the force that is exerted by the spring due to its mass.

Mathematically, the restoring force can be written as :

F\propto-x

F = - k x

where,

k is the spring constant.

x is the displacement caused due to the mass.

Negative sign shows that the force is acting in opposite direction.

So, it is clear that the restoring force is directly proportional to the displacement of the block.

Hence, the correct option is (b) " The restoring force is directly proportional to the displacement of the block ".

5 0
2 years ago
Read 2 more answers
The number of gallons of water in a storage tank at time t, in minutes, is modeled by w(t) = 25 − t2 for 0≤t≤5. At what rate, in
Kisachek [45]

Answer:

Rate of change of water will be -6 gallon/minute

Explanation:

We have given water in the tank as the function of time as

w(t)=25-t^2

We have to find the rate of change of water in the tank at t = 3 minute

For rate of change we have to differentiate both side

So \frac{dw}{dt}=0-2t

At t = 3 minute

\frac{dw}{dt}=0-2\times 3=-6gallon/minute

8 0
2 years ago
Other questions:
  • A sound wave traveling eastward through air
    8·2 answers
  • If E1 = 13.0 V and E2 = 5.0 V , calculate the current I2 flowing in emf source E2.
    8·1 answer
  • A vector A is added to B=6i-8j. The resultant vector is in the positive x direction and has a magnitude equal to A . What is the
    12·2 answers
  • describe how the piece of chalk in this image may be affected by static friction, sliding friction, fluid friction and rolling f
    9·2 answers
  • A hot–air balloon is moving at a speed of 10.0 meters/second in the +x–direction. The balloonist throws a brass ball in the +x–d
    10·1 answer
  • A horizontal jet of water is made to hit a vertical wall with a negligible rebound. If the speed of water from the jet is 'v', t
    13·1 answer
  • A plane traveling north at 100.0 km/h through the air gets caught in a 40.0 km/h crosswind blowing west. This turbulence caused
    15·1 answer
  • Carbon dioxide (CO2) gas within a piston–cylinder assembly undergoes a process from a state where p1 = 5 lbf/in.2 , V1 = 2.5 ft3
    9·1 answer
  • A clever inventor has created a device that can launch water balloons with an initial speed of 85.0 m/s. Her goal is to pass a b
    8·1 answer
  • A box of mass M is pushed a distance Δ x across a level floor by a constant applied force F . The coefficient of kinetic frictio
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!