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3 years ago

PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!

Physics

1 answer:

Sav [38]3 years ago

4 0

Hi again!

The correct answer for the kinetic energy of the car is 484,000 joules.

We can find this by using the formula. The formula for kinetic energy is $\frac{1}{2}$ m $v^{2} \\$

Knowing this we can fill in the formula using the info we were provided. Doing this we get: $\frac{1}{2}$ (2,000 · $22^{2}$ )

$22^{2}$ = 484

2,000 · 484 = 968,000

$\frac{1}{2}$ · 968,000 = 484,000

_______________________________

Question 9: Anthony has more power than Angel

We can see Anthony gets done with the same work quicker than Angel. But they did the same amount of work, just Anthony was quicker. Power is the rate at which work is done. Knowing this we can see the answer is Anthony has more power than Angel.

I hope those answers help u!

Good luck! :)

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A wave travels at 13 m/s and the crests are 6 meters apart. How many waves would you see pass you by per second? (round up to th

MrRa [10]

Answer:Number of waves =2.2

Explanation:

The frequency of A wave is defined as the number of waves moving a fixed point per second which is given as

f= $\frac{N}{t}$

F= Frequency

N= number of waves

t= time

We first find the frequency

Given velocity of the wave, v = 13m/s

and wavelength, λ as 6meters(distance between two consecutive crest)

, we fiind the frequency using

v= f λ

frequency = v / λ

= (13m/s ) / 6

=2.16s-1

f = $\frac{N}{t}$

2.16s₋¹= $\frac{N}{1s}$

Therefore N, Number of waves = 2.16 waves rounded up to 2.2 waves

3 0

3 years ago

What is the average power supplied by a 60.0 kg secretary running up a 4.0 m tall flight of stairs in 4.2 s?

Alchen [17]

A 60.0 kg secretary running up a 4.0 m tall flight of stairs in 4.2 s has an average power of 560 W (Option b).

<h3>What is power?</h3>

Power is the work done over a period of time.

A secretary with a mass (m) of 60.0 kg runs up a 4.0 m (d) tall flight of stairs. Given gravity (g) is 9.81 m/s², the work (W) done is:

W = m × g × d = 60.0 kg × 9.81 m/s² × 4.0 m = 2.35 × 10³ J

They do 2.4 × 10³ J of work in 4.2 s (t). The average power (P) is:

P = W / t = 2.35 × 10³ J / 4.2 s = 560 W

A 60.0 kg secretary running up a 4.0 m tall flight of stairs in 4.2 s has an average power of 560 W (Option b).

Learn more about power here: brainly.com/question/911620

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8 0

2 years ago

A 75.5-kg person puts on a life jacket, jumps into the water, and floats. The jacket has a volume of 3.38 x 10-2 m3 and is compl

Andreyy89

Answer:

Density of jacket will be $680.4733kg/m^3$

Explanation:

We know that weight of water displaced= buoyant force=weight of man

Now volume of water displaced $v=3.38\times 10^{-2}+6.42\times 10^{-2}=9.8\times 10^{-2}m^3$

Density of water $d=100kg/m^3$

So weight of water displaced $=9.8\times 10^{-2}\times 1000=98kg$

So weight of jacket = 98-75 = 23 kg

We have given volume of the jacket = $3.38\times 10^{-2}m^3$

So density of jacket $=\frac{mass}{volume}=\frac{23}{3.38\times 10^{-2}}=680.4733kg/m^3$

6 0

3 years ago

Sean and Tommy are debating the positive and negative impacts of technology on environmental quality. Sean is listing the positi

Talja [164]

Answer:

Explanation:

I would say it's A.

5 0

3 years ago

Read 2 more answers

Think back to coulomb's law. two coins with identical charges are placed on a lab table 1.35 m apart.

ziro4ka [17]

The Coulomb’s law is expressed mathematically as:

F = k * q1 * q2 / d^2

Where,

F = force of attraction between 2 particles = 2.0 N

<span> k = Coulomb’s constant = 8.988 * 10^9 N m^2 / C^2</span>

q = charge of the particle

d = distance between the 2 particles = 1.35 m

Since the two coins have identical charges therefore q1 = q2 =q

F = k* q^2 / d^2

2.0 N = (8.988 * 10^9 N m^2 / C^2) * q^2 / (1.35 m)^2

q = 2.01 * 10^-5 C

<span>Therefore each coins have charges equivalent to 2.01 * 10^-5 C.</span>

4 0

4 years ago