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2 years ago

Your washer has power of 450 watts, and your dryer has a power of 3000

Physics

1 answer:

bulgar [2K]2 years ago

3 0

Answer:

4950 watt hours.

Explanation:

450*1 + 3000*1.5 = 4950w

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The moons of Mars, Phobos (Fear) and Deimos (Terror), are very close to the planet compared to Earth's Moon. Their orbital radii

tankabanditka [31]

Answer:

$0.2528$

Explanation:

To calculate the period we need the formula:

$T=\frac{2\pi r^{3/2}}{\sqrt{GM}}$

Where $r$ is the radius of the moon, $G$ is the universal constant of gravitation and $M$ is the mass of mars.

The period of Phobos:

$T_{p}=\frac{2\pi r_{p}^{3/2}}{\sqrt{GM}}$

The period of Deimos:

$T_{D}=\frac{2\pi r_{D}^{3/2}}{\sqrt{GM}}$

The ratio of the period of Phobos and Deimos:

$\frac{T_{p}}{T_{D}}=\frac{\frac{2\pi r_{p}^{3/2}}{\sqrt{GM}}}{\frac{2\pi r_{D}^{3/2}}{\sqrt{GM}}}$

$\frac{T_{p}}{T_{D}}=\frac{\sqrt{GM}2\pi r_{p}^{3/2}}{\sqrt{GM}2\pi r_{D}^{3/2}}$

Most terms get canceled and we have:

$\frac{T_{p}}{T_{D}}=\frac{r_{p}^{3/2}}{r_{D}^{3/2}}$

According to the problem

$r_{p}=9,378km\\r_{D}=23,459km$

so the ratio will be:

$\frac{T_{p}}{T_{D}}=\frac{(9,378)^{3/2}}{(23,459)^{3/2}}=\frac{908166.22}{3593058.125}=0.25275$ ≈ $0.2528$

the ratio of the period of revolution of Phobos to that of Deimos is 0.2528

8 0

3 years ago

Where would sound NOT be

Tcecarenko [31]

The answer is D, or Outer Space.

Explanation:

Sound is implemented through mechanical wave transferral, which requires a medium (solid, liquid, or gas) to travel through. Because sound is a mechanical wave, it cannot travel through vacuums (space).

6 0

3 years ago

The sound intensity of a certain type of food processor in normally distributed with standard deviation of 2.9 decibels. If the

Maru [420]

Answer: $(48.41,\ 52.19)$

Explanation:

The confidence interval for population mean is given by :-

$\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

Given : Sample size : $n=9$

Sample mean : $\ovreline{x}=50.3\text{ decibels}$

Standard deviation : $\sigma=2.9\text{ decibels }$

Significance level : $\alpha=1-0.95=0.05$

Critical value : $z_{\alpha/2}=z_{0.025}=1.96$

Now, the 95% confidence interval estimate of the (true, unknown) mean sound intensity of all food processors of this type :-

$50.3\pm (1.96)\dfrac{2.9}{\sqrt{9}}\\\\\approx50.3\pm1.89\\\\=(50.3-1.89,\ 50.3+1.89)=(48.41,\ 52.19)$

6 0

3 years ago

Smaller and fainter than the other types of galaxies: A. Elliptical B. Irregular C. Sprial

SIZIF [17.4K]

Your answer should be B. Irregular

3 0

3 years ago

Ou are walking around your neighborhood and you see a child on top of a roof of a building kick a soccer ball. the soccer ball i

Cloud [144]

<span>9.16 meters First, split the velocity into horizontal and vertical components. h = 21 cos(47Â°) = 21 * 0.744270977 = 15.62969052 m/s v = 21 sin(47Â°) = 21 * 0.731353702 = 15.35842773 m/s Now determine how many seconds the ball had to travel to reach 57 meters. T = 57 m / 15.62969052 m/s = 3.647 s height of the ball at time T is d = vT - 0.5AT^2 where v = initial velocity T = Time A = acceleration due to gravity (9.8m/s^2) Plug in the known values d = (15.35842773 m/s)(3.647 s) - 0.5 9.8 m/s^2 (3.647 s)^2 d = 56.01219 m - 4.9 m/s^2 (13.30061s^2) d = 56.01219 m - 65.17298 m d = -9.1608 m So the ball fell a total of 9.16 meters, which means that the building was 9.16 meters tall.</span>

3 0

3 years ago