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3 years ago

How to convert 7500kilometers to meters

Physics

1 answer:

Kazeer [188]3 years ago

7 0

Answer:

7500000 metres

Explanation:

1 kilometre = 1000 metres

so 7500 kilometres would equal to 7500000 metres

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You push against a steamer trunk with a force of 750 N at an angle of 25° with the horizontal . The trunk is on a flat floor and

djverab [1.8K]

This means that the horizontal force is 750sin(25°). To be able to move the truck, force applied must be greater than static friction, which equals to its coefficient (0.77) x normal contact force (= weight)

Hence, 750sin(25°) = 0.77mg. m = 750sin(25°)/(0.77g)

3 0

3 years ago

A motorcyclist drives from A to B with a uniform speed of 30 km/h and returns back with a speed of 20km/h-¹ find the average spe

k0ka [10]

Answer:

Average speed = 24 km/h

Explanation:

Let the distance be x.

Given the following data;

Uniform speed A = 30 km/h

Uniform speed B = 20 km/h

To find the average speed;

Mathematically, the average speed of an object is given by the formula;

$Average \; speed = \frac {total \; distance}{total \; time}$ ..... equation 1

Total time = TA + TB

$T_{A} = \frac {x}{30}$

$T_{B} = \frac {x}{20}$

$Total \; time = \frac {x}{30} + \frac {x}{20}$

$Total \; time = \frac {5x}{60}$

Total distance = x + x

Total distance = 2x

Substituting the values into equation 1;

$Average \; speed = \frac {2x}{\frac {5x}{60}}$

$Average \; speed = \frac {2x*60}{5x}$

$Average \; speed = \frac {120}{5}$

Average speed = 24 km/h

6 0

3 years ago

What is the speed of sound dependent on?

mojhsa [17]

Depends on the elasticity and density of the medium through what it is traveling

5 0

3 years ago

Two particles, one with charge -5.45 × 10^-6 C and one with charge 4.39 × 10^-6 C, are 0.0209 meters apart. What is the magnitud

Levart [38]

Explanation:

Given that,

Charge 1, $q_1=-5.45\times 10^{-6}\ C$

Charge 2, $q_2=4.39\times 10^{-6}\ C$

Distance between charges, r = 0.0209 m

1. The electric force is given by :

$F=k\dfrac{q_1q_2}{r^2}$

$F=9\times 10^9\times \dfrac{-5.45\times 10^{-6}\times 4.39\times 10^{-6}}{(0.0209)^2}$

F = -492.95 N

2. Distance between two identical charges, $r=0.0209\ m$

Electric force is given by :

$F=\dfrac{kq_3^2}{r^2}$

$q_3=\sqrt{\dfrac{Fr^2}{k}}$

$q_3=\sqrt{\dfrac{492.95\times (0.0209)^2}{9\times 10^9}}$

$q_3=4.89\times 10^{-6}\ C$

Hence, this is the required solution.

3 0

3 years ago

The annual production of Cl2 is about 45 millions tons per year. Assume that a typical plant is operational 90 % of the year. Th

olga nikolaevna [1]

Answer:

a) CI^- ⇒ CI2 + 2e^-

b) 4.2 * 10^9 amperes

c) 1.4 * 10^10 watts

Explanation:

Given data:

Annual production of C12 = 45 millions tons per year

Typical plant operational percentage = 90%

Operating voltage of a cell = 3.4 v

A) Half-cell reaction for oxidation chloride to form chlorine

CI^- ⇒ CI2 + 2e^-

B) Calculate the total current worldwide needed to generate the global supply of CI 2

Total current = $\frac{Q}{t}$ = $\frac{1.2*10^{17} }{2.84*10^7}$ = 4.2 * 10^9 amperes

Q = charge , t = time

C ) Calculate electrical power need to produce global supply of chlorine using electrolysis

P = V*I

= 3.4 * 4.2 * 10^9

= 1.4 * 10^10 watts

7 0

3 years ago

How to convert 7500kilometers to meters​

How to convert 7500kilometers to meters