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2 years ago

Nobel gases share which characteristics?

2 answers:

8 0

Full outer shell of electrons, they are colorless and odorless ,their melting and boiling points are close together which gives them very narrow liquid range

belka [17]2 years ago

6 0

The elements that make up the family of noble gases include helium, neon, argon, krypton, xenon, and radon.

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A team of astronauts is on a mission to land on and explore a large asteroid. In addition to collecting samples and performing e

GenaCL600 [577]

Answer:

463.4 m/s

Explanation:

The escape velocity on the surface of a planet/asteroid is given by

$v=\sqrt{\frac{2GM}{R}}$ (1)

where

G is the gravitational constant

M is the mass of the planet/asteroid

R is the radius of the planet/asteroid

For the asteroid in this problem, we know

$\rho=4.49\cdot 10^6 g/m^3$ is the density

$V=3.32\cdot 10^{12} m^3$ is the volume

So we can find its mass:

$M=\frac{\rho}{V}=(4.49\cdot 10^6 g/m^3)(3.32\cdot 10^{12}m^3)=1.49\cdot 10^{19} kg$

Also, the asteroid is approximately spherical, so its volume is given by

$V=\frac{4}{3}\pi R^3$

where R is the radius. Solving the formula for R, we find its radius:

$R=\sqrt[3]{\frac{3V}{4\pi}}=\sqrt[3]{\frac{3(3.32\cdot 10^{12}m^3)}{4\pi}}=9256 m$

So now we can use eq.(1) to find the escape velocity:

$v=\sqrt{\frac{2(6.67\cdot 10^{-11})(1.49\cdot 10^{19}kg)}{9256 m}}=463.4 m/s$

3 0

2 years ago

Dwight pulls his sister in her wagon with a force of 65 N at an angle of 50.0º to the ground. What are the magnitudes of the hor

NeTakaya

Refer to the diagram shown.

F = 65 N, the force exerted by Dwight.

The horizontal component of the force is
65 cos(50°) = 41.8 N
The vertical component of the force is
65 sin(50°) = 49.8 N

Answer:
Horizontal: 41.8 N
Vertical: 49.8 N

3 0

3 years ago

A student team is to design a human powered submarine for a design competition. The overall length of the prototype submarine is

nikklg [1K]

Answer:

a) The speed is 61.42 m/s

b) The drag force is 10.32 N

Explanation:

a) The Reynold´s number for the model and prototype is:

$Re_{m} =\frac{p_{m}V_{m}L_{m} }{u_{m} }$

$Re_{p} =\frac{p_{p}V_{p}L_{p} }{u_{p} }$

Equaling both Reynold's number:

$\frac{p_{p}V_{p}L_{p} }{u_{p} }=\frac{p_{m}V_{m}L_{m} }{u_{m} }$

Clearing Vm:

$V_{m} =\frac{p_{p}V_{p}L_{p} u_{m} }{u_{p} p_{m} L_{m} }=\frac{999.1*0.56*8*1.849x10^{-5} }{1.138x10^{-3}*1.184*1 } =61.42m/s$

b) The drag force is:

$\frac{F_{Dm} }{p_{m}V_{m}^{2}L_{m}^{2} } =\frac{F_{Dp} }{p_{p}V_{p}^{2}L_{p}^{2} } \\F_{Dp} =\frac{F_{Dp}p_{p}V_{p}^{2}L_{p}^{2} }{p_{m}V_{m}^{2}L_{m}^{2} } \\F_{Dp}=\frac{2.3*999.1*0.56^{2} *8^{2} }{1.184*61.42^{2}*1^{2} } =10.32N$

8 0

2 years ago

Read 2 more answers

6. If a car went a distance of 225 kilometers in 4

denis23 [38]

Answer:

56.25

Explanation:

225/4=56.25

3 0

2 years ago

A syrup added to an empty container with a mass of 115.25g . When 0.100 pint of syrup is added, the total mass of the container

sesenic [268]

<span>Density is a physical property of a substance that represents the mass of that substance per unit volume. It is a property that can be used to describe a substance. We calculate as follows:

Density = 182.48 g - 115.25 g / 0.100 pint ( 0.47 L / 1 pint ) = 67.23 g/0.047L
Density =1430.43 g/L </span>

3 0

2 years ago