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3 years ago

5

What happens to power as speed increases?

1 answer:

belka [17]3 years ago

7 0

Well you know the formula is,

Power= Work/Time

So as time increases, Power Decreases, it's an inverse relationship.

Think about it like this, to have more "power" you have to be able to do a lot in a short amount of time, so by spending more time on something, your power decreases.

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Whats the answer???????????

Leviafan [203]

Answer: Less than 4 ohms

Explanation:

We have three resistors with the following resistance:

$R_{1}=4\Omega$

$R_{2}=6\Omega$

$R_{3}=8\Omega$

Now, when the resistors are connected in parallel, the total resistance $R$ is calculated as follows:

$\frac{1}{R}=\frac{1}{R_{1}}+\frac{1}{R_{2}}+\frac{1}{R_{3}}$

Isolating $R$ :

$R=\frac{R_{1}R_{2}R_{3}}{R_{3}(R_{1}+R_{2})+R_{1}R_{2}}$

Rewriting with th known values:

$R=\frac{(4\Omega)(6\Omega)(8\Omega)}{8\Omega(4\Omega+6\Omega)+(4\Omega)(6\Omega)}$

Finally:

$R=1.84 \Omega$

Hence, the correct option is less than 4 ohms.

4 0

3 years ago

Alekssandra [29.7K]

Answer:

I just need to get points soorry

Explanation:

3 0

3 years ago

According to the periodic table, the average atomic mass of helium is

vfiekz [6]

Helium has an atomic mass of 4.00 atomic mass units.

8 0

4 years ago

. A car with a mass of 700-kg changes its speed from 10.0 m/s to 30.0 m/s in a displacement of 50.0 meters. Calculate the net fo

Nezavi [6.7K]

Answer:

5600N

Explanation:

Given parameters:

Mass of car = 700kg

Initial velocity = 10m/s

Final velocity = 30m/s

Displacement = 50m

Unknown:

Net force acting on the car = ?

Solution:

To find the force acting on a body, it is pertinent we know the mass and acceleration.

Force = mass x acceleration

Now;

Let us find the acceleration from the kinematics equations:

v² = u² + 2aS

v is the final velocity

u is the initial velocity

a is the acceleration

S is the distance

30² = 10² + (2 x a x 50)

900 = 100 + 100a

100a = 800

a = 8m/s²

Therefore;

Force = 700 x 8 = 5600N

6 0

3 years ago

Suppose that a simple pendulum consists of a small 81 g bob at the end of a cord of negligible mass. If the angle θ between the

MariettaO [177]

Answer:

(a) 0.115 m

(b) 2.08 x 10^-5 J

Explanation:

mass of bob, m = 81 g = 0.081 kg

The equation of oscillation is given by

θ = 0.068 Cos {9.2 t + Ф}

Now by comparison

The angular velocity

ω = 9.2 rad/s

(a) $\omega^{2} =\frac{g}{L}$

where, L be the length of the pendulum

$L =\frac{g}{\omega ^{2}}$

$L =\frac{9.8}{9.2 \times 9.2}$

L = 0.115 m

(b) A = L Sinθ

A = 0.115 x Sin 0.068

A = 7.8 x 10^-3 m

Maximum kinetic energy

K = 0.5 x mω²A²

K = 0.5 x 0.081 x 9.2 x 9.2 x 7.8 x 7.8 x 10^-6

K = 2.08 x 10^-5 J

8 0

3 years ago