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torisob [31]
3 years ago
13

WILL MARK BRAINLIEST. Look at the circuit below. What is the voltage between points C and D?

Physics
2 answers:
lianna [129]3 years ago
7 0

The hard way:

-- The total resistance in the series circuit is 120 ohms.

-- The current in the circuit is (voltage)/(resistance) = 3/60 = 0.025 A

-- The resistance between C and D is 60 ohms.

-- The voltage across a resistance is (current) x (resistance) = (0.025 x 60) = <em>1.5 volts. </em>(C)

<em>=================================</em>

The easy way:

-- In a series circuit, the total voltage of the power source divides among the circuit's components in proportion to their resistances.

-- Since the bulbs have equal resistances, each one will have 1/2 of the battery voltage across it.

-- (1/2) of (3 volts) = <em>1.5 volts</em> (C)

elena-s [515]3 years ago
6 0

Since two identical bulbs are connected in this circuit in series combination

So here same current will flow into the circuit

So here we can say

V = V_1 + V_2

V = 3 volts

also we know that

V_1 = iR_1

V_2 = iR_2

also it is given that bulbs are identical so we have

V_1 = V_2

as we have

R_1 = R_2

so now we can say

V = 2V_{CD}

3 = 2V_{CD}

V_{CD} = 1.5 Volts

so here voltage across C and D is 1.5 volts

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Which car has the most kinetic energy?
mixas84 [53]

Answer:

B. A car of mass 2000 kg with speed 7 m/s

Explanation:

The kinetic energy of an object is given by:

K=\frac{1}{2}mv^2

where m is the mass of the object and v is its speed.

From the formula, we see that the larger the mass and the speed of the object, the larger its kinetic energy. Among the choices given, we see that the car with largest mass and largest speed is car B, which has a mass of 2000 kg and speed of 7 m/s. Its kinetic energy is:

K=\frac{1}{2}(2000 kg)(7 m/s)^2=49,000 J

We can verify that the other cars have smaller kinetic energy. In fact:

- Car A: K=\frac{1}{2}(1000 kg)(3 m/s)^2=4,500 J

- Car C: K=\frac{1}{2}(1000 kg)(7 m/s)^2=24,500 J

- Car D: K=\frac{1}{2}(2000 kg)(3 m/s)^2=9,000 J

So, car B is the one which has most kinetic energy.

5 0
4 years ago
What are the body measurements​
ki77a [65]

Answer:

body measurements are a common method specifying body proportion for the purpose of fitting clothes.

6 0
3 years ago
Read 2 more answers
Bone has a Young's modulus of about
saveliy_v [14]

Answer: 4.74 mm

Explanation:

We can solve this problem with the following equation:

Y=\frac{stress}{strain} (1)

Where:

Y=1.8(10)^{10} Pa is the Young modulus for femur

stress=\frac{F}{A}=1.58(10)^{8} Pa is the stress (force F applied per unit of transversal area A) on the femur

strain=\frac{\Delta l}{l_{o}}

Being:

\Delta l the compression the femur can withstand before breaking

l_{o}=0.54 m is the length of the femur without compression

Writing the data in equation (1):

Y=\frac{\frac{F}{A}}{\frac{\Delta l}{l_{o}}} (2)

1.8(10)^{10} Pa=\frac{1.58(10)^{8} Pa}{\frac{\Delta l}{0.54 m}} (3)

Isolating \Delta l:

\Delta l=\frac{(1.58(10)^{8} Pa)(0.54 m)}{1.8(10)^{10} Pa} (4)

\Delta l=0.00474 m (5) This is the compression in meters

Converting this result to millimeters:

\Delta l=0.00474 m \frac{1000 mm}{1 m}=4.74 mm

4 0
4 years ago
A stretched string has a mass per unit length of 5.12 g/cm and a tension of 19.3 N. A sinusoidal wave on this string has an ampl
Sati [7]

Answer:

a. 0.143 mm b. 77.6 rad/m c. 483.18 rad/s  d. +1

Explanation:

a. ym

Since the amplitude is 0.143 mm, ym = amplitude = 0.143 mm

b. k

We know k = wave number = 2π/λ where λ = wavelength.

Also, λ = v/f where v = speed of wave in string = √(T/μ) where T = tension in string = 19.3 N and μ = mass per unit length = 5.12 g/cm = 5.12 ÷ 1000 kg/(1 ÷ 100 m) = 0.512 kg/m and f = frequency = 76.9 Hz.

So, λ = v/f = √(T/μ)/f

substituting the values of the variables into the equation, we have

λ = √(T/μ)/f

= √(19.6 N/0.512 kg/m)/76.9 Hz

= √(38.28 Nkg/m)/76.9 Hz

= 6.187 m/s ÷ 76.9 Hz

= 0.081 m

= 81 mm

So, k = 2π/λ

= 2π/0.081 m

= 77.6 rad/m

c. ω

ω = angular frequency = 2πf where f = frequency of wave = 76.9 Hz

So, ω = 2πf

= 2π × 76.9 Hz

= 483.18 rad/s

d. The correct choice of sign in front of ω?

Since the wave is travelling in the negative x - direction, the sign in front of ω is positive. That is +1.

4 0
3 years ago
ANSWER QUICKLY PLEASE &lt;3
Sladkaya [172]

The forces on one of the wires will be 0.000264 N.It is the field sensed around a moving electric charge that gives rise to the magnetic force.

<h3>What is a magnetic field?</h3>

It is the type of field where the magnetic force is obtained. With the help of a magnetic field. The magnetic force is obtained it is the field felt around a moving electric charge.

The given data in the problem is;

I is the current = 6.50 A

B is the magnetic field=f 2.71 X 10⁻⁵ T

The force on the wire is;

\rm F= BIL \\\\\ F=2.71 \times 10^{-5} \ T \times 6.50 \  A \times 1.50 \ m \\\\\ F=0.000264225 \ N

Hence, the force on one of the wires will be 0.000264 N.

To learn more about the magnetic field refer to the link;

brainly.com/question/19542022

#SPJ1

6 0
2 years ago
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