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zhuklara [117]
4 years ago
11

What is the average velocity of a car that travels 30 kilometers due wet in 0.50

Physics
1 answer:
rodikova [14]4 years ago
3 0

Answer:

60km/hr west

Explanation:

When you are dealing with velocity you always name the direction its going in

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What happens to water when it changes to ice?
Nezavi [6.7K]

Answer:

its density decreases it volume increases

Explanation:

When water turns to ice, it expands / contracts. Water is more / less dense than ice. The water you drink is a solid / liquid / gas.

5 0
3 years ago
At what temperature is the fahrenheit scale reading equal to twice that of the celsius?
yuradex [85]
320 degrees Fahrenheit and 160 degrees Celsius
5 0
3 years ago
The energy stored by any pair of positive charges is inversely proportional to the distance between them, and directly proportio
denpristay [2]

Answer:

 U = 25 J

Explanation:

The energy in a set of charges is given by

          U = k \sum \frac{q_i}{r_i}

in this case we have three charges of equal magnitude

          q = q₁ = q₂ = q₃

with the configuration of an equilateral triangle all distances are worth

          d = a

          U = k ( \frac{q_1q_2}{ r_1_2 } + \frac{q_1q_3}{r_1_3} + \frac{q_2q_3}{r_2_3} )

we substitute

           15 = k q² (3 / a)

            k q² /a = 5

For the second configuration a load is moved to the measured point of the other two

          d₁₃ = a

The distance to charge 2 that is at the midpoint of the other two is

          d₁₂ = d₂₃ = a / 2

           U = k (\frac{q_1q_2}{ r_1_2 } + \frac{q_1q_3}{r_1_3} + \frac{q_2q_3}{r_2_3})

            U = k q² (  \frac{2}{a} + \frac{1}{a} + \frac{2}{a} )

            U = (kq² /a) 5

substituting

            U = 5 5

            U = 25 J

5 0
3 years ago
Two identical blocks are attached to the same massless rope, which is strung around two massless, frictionless pulleys. A massle
Alik [6]

Answer:

The value of mass 1, m1= 6/5m

The value of mass 2, m2= 3/5m

Explanation:

case 1:

here tension and the acceleration will be:

for m1;

  • mg-T=ma
  • 2mg - 2T = 2ma  .....1.

for m2:

  • 2T-mg = ma/2 ..... 2.

adding the both equations,

2mg - 2T + 2T-mg = 2ma + ma/2

a = 2/5 g

putting the value of a into the equation 1.

mg - T = m* (2/5)g

T = 3/5 ( mg )

now

case 2:

The two identical blocks are released from the rest, the tension remains the same as the case 1.

so,

for m1:

  • 2T-m2g=0

for m2:

  • 2m2g - 2T =0

adding both equations we get,

2T-m2g + 2m2g - 2T = 0

m2 = m1 / 2

T = m1*g / 2

here we know that

T (case1) = T (case2)

3/5 ( mg ) = m1*g / 2

m1 = 6/5 m

hence

m2 = 3/5 m

learn more about tension here:

<u>brainly.com/question/23590078</u>

<u />

#SPJ4

4 0
2 years ago
The electric field in a certain region of Earth’s atmo- sphere is directed vertically down. At an altitude of 300 m the field ha
I am Lyosha [343]

Answer:

Net charge contained in the cubeq= 3.536×10^-6C

Explanation:

Formular for total flux in a cube is given as:

Total flux= E300Acos(180) + E200Acos(0)

Where A is crossectional area

Total flux= A(E200-E300)

Total flux= q/Eo

q= Eo×total flux

q=(8.84×10^-12)×(100)^2×(100-60)

q= 3.536×10^-6C

6 0
4 years ago
Read 2 more answers
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