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3 years ago

Give me the ans of this plsss

Physics

1 answer:

MissTica3 years ago

5 0

vib. motion motion of wire of guitar

circular motion revolution of earth around sun

1ml 1cm3

1m3 100cm3

volume of liquid measuring cylinder

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Which choice best describes how scientists learn new information during investigations?

OlgaM077 [116]

Answer:

Explanation:

During investigations a scientist needs to observe, investigate, collect data and put together the information they collect.

4 0

3 years ago

In 2000, NASA placed a satellite in orbit around an asteroid. Consider a spherical asteroid with a mass of 1.40×1016 kg and a ra

Arturiano [62]

A) 8.11 m/s

For a satellite orbiting around an asteroid, the centripetal force is provided by the gravitational attraction between the satellite and the asteroid:

$m\frac{v^2}{(R+h)}=\frac{GMm}{(R+h)^2}$

where

m is the satellite's mass

v is the speed

R is the radius of the asteroide

h is the altitude of the satellite

G is the gravitational constant

M is the mass of the asteroid

Solving the equation for v, we find

$v=\sqrt{\frac{GM}{R+h}}$

where:

$G=6.67\cdot 10^{-11} m^3 kg^{-1}s^{-2}$

$M=1.40\cdot 10^{16}kg$

$R=8.20 km=8200 m$

$h=6.00 km = 6000 m$

Substituting into the formula,

$v=\sqrt{\frac{(6.67\cdot 10^{-11})(1.40\cdot 10^{16}kg)}{8200 m+6000 m}}=8.11 m/s$

B) 11.47 m/s

The escape speed of an object from the surface of a planet/asteroid is given by

$v=\sqrt{\frac{2GM}{R+h}}$

where:

$G=6.67\cdot 10^{-11} m^3 kg^{-1}s^{-2}$

$M=1.40\cdot 10^{16}kg$

$R=8.20 km=8200 m$

$h=6.00 km = 6000 m$

Substituting into the formula, we find:

$v=\sqrt{\frac{2(6.67\cdot 10^{-11})(1.40\cdot 10^{16}kg)}{8200 m+6000 m}}=11.47 m/s$

5 0

3 years ago

What is the energy of the electron in a helium ion with a charge of +1 in an orbit with a value of n=4?

goldenfox [79]

Answer:

The energy of the electron in a helium ion is $-5.44\times10^{-19}\ J$

Explanation:

Given that,

Charge = +1

Value of n = 4

Suppose $k=2.179\times10^{-18}\ J$

We need to calculate the energy of the electron in a helium ion

Using formula of energy

$E_{n}=-k\dfrac{z^2}{n^2}$

Put the value into the formula

$E_{n}=-2.179\times10^{-18}\times\dfrac{2^2}{4^2}$

$E_{n}=-5.44\times10^{-19}\ J$

Hence, The energy of the electron in a helium ion is $-5.44\times10^{-19}\ J$

8 0

3 years ago

The distance traveled by an object can be modeled by the equation d = ut + 0.5at2 where d = distance, u = initial velocity, t =

Taya2010 [7]

We are given with the expression d = ut + 0.5 at^2 and is asked to express the equation in terms of a. First, we transpose ut to the left side, then we multiply to the equation and divide lastly the resulting equation by t^2. The final expression becomes a = 2(d-ut)/t^2.

8 0

3 years ago

Determine the kinetic energy of a 1000-kg roller coaster car that is moving with a speed of 20.0 m/s.

Nookie1986 [14]

Answer:

The kinetic energy is 200.000 Joule (200KJoule)

Explanation:

We use the formula of kinetic energy:

Ec =1/2 x m x v^2

Ec=1/2 x 1000kg x (20m/s)^2 = 200.000Joule

200.000J/1000KJ/J=200 kJoule

3 0

3 years ago

Give me the ans of this plsss​

Give me the ans of this plsss