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OLEGan [10]
4 years ago
14

A circuit is made of 0.4 ohm wire, 150 ohm bulb and a 120ohm rheo stat connected inseries. Determine the total resistance of the

resistance of the circuit?
Physics
1 answer:
lions [1.4K]4 years ago
6 0
Answer:
Total resistance = 270.4 ohm

Explanation:
In series connection, the total resistance can be calculated by adding all the resistances.

We have:
wire resistance = 0.4 ohm
bulb resistance = 150 ohm
rheostat resistance = 120 ohm

Adding up all the resistances, we can get the total resistance of the circuit as follows:
Total resistance = 0.4 + 150 + 120 = 270.4 ohm

Hope this helps :)
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A cart of mass 20 kg, initially at rest, is pushed with a net force of 40 N on a flat surface. If the cart is pushed 5 m, what i
bixtya [17]
Using the theorem of kinetic energy
1/2mVf² - 1/2mVi²= WF + Wp,     Wp=0
WF = F. AB, AB=5m and F= 40N, m=20kg
so the final kinetic  is KEf= 1/2mVf² = WF =<span>F. AB= 40*5=200J
</span>
the final velocity is 1/2mVf² <span>=200, implies   Vf= sqrt(20)=2sqrt(5)m/s</span>

3 0
3 years ago
If you were asked how to evaluate scientific evidence, what would you would want to include in your answer?
raketka [301]
You would want to include qualitative and quantitative evidence
6 0
4 years ago
Andrea and the other members of the tennis team are practicing hitting tennis balls. If two people hit identical balls at the sa
Pachacha [2.7K]

If two people hit identical tennis balls at the same time, the ball that has the most kinetic energy is the ball that moves at the fastest speed.

<u>Explanation:</u>

The energy possessed by an object by virtue of its motion is called its kinetic energy indicating that only moving objects have kinetic energy. The kinetic energy of an object depends on its speed and mass.

It is given by the expression

K=1/2 mv^2

where m denotes the mass of the object and v denotes its velocity.

since kinetic energy is directly proportional to the square of the velocity, the kinetic energy of an object increases with its velocity.

Hence an object that moves at the fastest speed will have the most kinetic energy.

8 0
3 years ago
A pebble is dropped from rest from the top of a tall cliff and falls 53.4 m after 3.3 s has elapsed. How much farther does it dr
jeka94

Answer:

426.84 m

Explanation:

initial velocity u = 0

time t = 3.3 s

distance travelled s = 53.4 m

acceleration due to gravity = g

s = ut + 1/2 g t²

53.4 = 0 + 1/2 g x 3.3²

g = 9.8 m /s²

For the whole length of fall

distance travelled = h

total time = 6.6 + 3.3 = 9.9 s

h = ut + 1/2 g t²

u again = 0

h = .5 x 9.8 x 9.9²

= 480.24 m

distance travelled in last 6.6 s

= 480.24 - 53.4

= 426.84 m

6 0
3 years ago
Consider a short time span just before and after the spark plug in a gasoline engine ignites the fuel-air mixture and releases 1
Tju [1.3M]

Answer:

Temperature after ignition=7883.205 K

Explanation:

The number of moles is,

n=PV/RT

=(1.18x10^6)(47.9x10^-6)/8.314(325)

= 0.0209 moles

a) In this process volume is constant

Q=U

=nCv.dT

dT= Q/nCv

=1970/(1.5x8.314)(0.0209)

= 7558.205 K

The final temperature is,

= 7558.205+325

= 7883.205 K

5 0
3 years ago
Read 2 more answers
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