A Tesla Roadster car accelerates from rest at a rate of 7.1m/s' for a time of 3.9s.

Which is the correct order from the closest to the sun to the farthest away from the sun?

luda_lava [24]

Put your bet down on Choice 'A'. The others are just flat wrong.

6 0

3 years ago

The coefficient of friction between a rider and the merry go round is 0.45 and the person is measured to be traveling at 20.0 RP

svlad2 [7]

The person must stand at a radius of 0.99 m

Explanation:

In order for the person to stand on the merry go round, the force of friction acting on the person must provide the centripetal force necessary to keep the person in uniform circular motion.

Therefore, we can write:

$\mu mg = m\omega^2 r$

where:

- the term on the left is the force of friction, and the term on the right is the centripetal force

$\mu = 0.45$ is the coefficient of friction

m is the mass of the person

$g=9.8 m/s^2$ is the acceleration of gravity

$\omega = 20 \frac{rev}{min} \cdot \frac{2\pi rad/rev}{60 s/min}=2.09 rad/s$ is the angular velocity

r is the radius of the circular path

Solving the equation for r, we find the radius at which the person must be standing:

$r=\frac{\omega^2}{\mu g}=\frac{(2.09)^2}{(0.45)(9.8)}=0.99 m$

Learn more about circular motion:

brainly.com/question/2562955

brainly.com/question/6372960

#LearnwithBrainly

8 0

3 years ago

Why are less massive stars thought to age more slowly than more massive stars have much less fuel?

docker41 [41]

The reason being nuclear reactions are slow in less massive stars than in massive stars hence they age slowly.

8 0

4 years ago

A resistor and a capacitor are connected in series across an ideal battery having a constant voltage across its terminals. (a) A

maks197457 [2]

Answer:

(a) D. Zero.

(b) C. Equal to the battery's terminal voltage.

Explanation:

The question is incomplete, see the complete question for your reference and information.

A resistor and a capacitor are connected in series across an ideal battery having a constant voltage

across its terminals. At the moment contact is made with the battery

(a) the voltage across the capacitor is

A) equal to the battery's terminal voltage.

B) less than the battery's terminal voltage, but greater than zero.

C) equal to the battery's terminal voltage.

D) zero.

(b) the voltage across the resistor is

A) equal to the battery's terminal voltage.

B) less than the battery's terminal voltage, but greater than zero.

C) equal to the battery's terminal voltage.

D) zero

A RC circuit is a circuit that is composed of both resistors and capacitors connect to a source of current or voltage.

basically when a voltage source is applied to an RC circuit, the capacitor, C charges up through the resistance, R

6 0

4 years ago

A rock is thrown by applying a force of 2.50N while doing 6.00J of work. Over what distance was the force applied?

maksim [4K]

Answer:

$\boxed {\boxed {\sf 2.40 \ meters}}$

Explanation:

Work is the product of force and distance, so the formula is:

$W= F \times d$

The work is 6.00 Joules, but

1 Joule (J) is equal to 1 Newton meter (N*m).
Therefore, the work of 6.00 J is equal to 6.00 N*m

The force is 2.50 Newtons.

The known values are:

W= 6.00 N*m
F= 2.50 N

Substitute the values into the formula.

$6.00 \ N*m= 2.50 \ N *d$

We are solving for distance, so we must isolate the variable, d. It is being multiplied by 2.50 Newtons and the inverse of multiplication is division. Divide both sides by 2.50 N.

$\frac {6.00 \ N*m}{2.50 \ N}=\frac{2.50 \ N * d}{2.50 \ N}$

$\frac {6.00 \ N*m}{2.50 \ N}=d$

The units of Newtons cancel out.

$\frac {6.00 m}{2.50 }=d$

$2.40 \ m =d$

The force was applied to the rock over a distance of <u>2.40 meters</u> and choice <u>C</u> is correct.

6 0

3 years ago