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4 years ago

What is the The most appropriate SI unit for measuring the length of an automobile

1 answer:

7 0

If you're talking about S.I. Unit then it must be "meter" (nothing else). Meter is the only S.I. Unit of length and it also uses in measuring the length of an automobile 'cause it varies from few meters to several thousand meters.

In short, Your Correct answer would be "meter" (m)

Hope this helps!

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What does the ideal gas law allow a scientist to calculate that the other laws do not?

Daniel [21]

The ideal gas law.
PV=nRT
P=presure
V=volume
n=number of moles
R=Gas costant
T=temperature.

Answer: a. Number of moles.

6 0

3 years ago

Read 2 more answers

A 25kg mass is suspended at the end of a horizontal, massless rope that extends from a wall on the left and from the end of a se

patriot [66]

<h2>Answer:20.97g N,32.63g N</h2>

Explanation:

We consider the forces at the knot.

The vertical forces are

$T_{2}Sin(50^{0}})$ is the vertical component of tension $T_{2}$ at the knot.

$-25g$ is the weight of the mass $25Kg$ acting downwards.

The horizontal forces are

$-T_{1}$ is the tension in the rope acting left.

$T_{2}Cos(50^{0})$ is the horizontal component of tension $T_{2}$ acting towards right.

Since the knot has no mass,it is always in equilibrium.

So,the sum of forces acting on it will be zero.

Balancing vertical forces gives,

$T_{2}Sin(50^{0}})$ $-25g=0$

$T_{2}$ = $32.63gN$

Balancing horizontal forces gives,

$T_{2}Cos(50^{0})$ $-T_{1}=0$

$T_{1}=32.63g\times Cos(50^{0})=20.97gN$

7 0

3 years ago

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Bobby walks 10 m north, then 6 m east. Calculate his total distance travelled.

Setler79 [48]

Answer:

Bobby walked a total of 16 meters

Explanation:

10 + 6 = 16

7 0

3 years ago

Question in picture.

Gelneren [198K]

<h2>Hello!</h2>

The answer is: A. 19.3 joules

Since it's an elastic collision, the kinetic energy after and before the collision will be the same.

Kinetic energy can be calculated using the following equation:

$KE=\frac{1}{2}mv^{2}$

Where:

$KE=KineticEnergy\\m=mass\\v=velocity$

So,

First object, (going to the right):

$m=7.20kg\\v=2\frac{m}{s}$

$KE_{1}=\frac{1}{2}*7.20Kg*(2\frac{m}{s})^{2}=14.4Joules$

Second object:, (going to the left):

$m=5.75kg\\v=-1.30\frac{m}{s}$

$KE_{2}=\frac{1}{2}*5.75kg*(-1.30\frac{m}{s})^{2}=4.86Joules$

Remember,

$1Joule=1Kg.\frac{m^{2}}{s^{2} }$

Hence,

The total kinetic energy after the collision will be:

$T=KE_{1}+KE_{2}=14.4Joules+4.86joules=19.26joules=19.3joules$

The total kinetic energy after the collision is 19.3 joules (rounded to the nearest tenth)

Have a nice day!

6 0

3 years ago

While standing on ice, you first throw a tennis ball and then a bowling ball. Which one would cause you to have the greatest neg

marshall27 [118]

<span>Throwing the bowling ball would have the greatest negative velocity becasue Principle of the Conservation of Momentum states that: if objects collide, the total momentum before the collision is the same as the total momentum after the collision (provided that no external forces - for example, friction - act on the system). Thatâ€™s amazingly useful because it means that you can tell what is going to happenÂ afterÂ a collisionÂ beforeÂ it has taken place. Principle of Conservation of Energy: Of course, energy is also conserved in any collision, but it isn't always conserved in the form of kinetic energy.</span>

3 0

3 years ago

Read 2 more answers