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2 years ago

Which statement is true about using shorter,steeper inclined planes to lift an object?

Physics

1 answer:

Grace [21]2 years ago

7 0

Is there supposed to be options with this or are those the options there, steeper and smaller

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A satellite is in a circular orbit very close to the surface of a spherical planet. The period of the orbit is 1.57 hours. What

MissTica

The of the planet is $2249.17 \frac{kg}{m^3}$

Solution:

Given

Time period T = 1.57 hours = $1.57 \times 60 \times 60 sec$

using formula

T = $\frac{2 \times \pi}{ \omega}$

$\omega = \frac{2 \pi} T\\\omega = \frac{2 \pi} {1.57 \times 60 \times 60 sec}$

also, force $F = \frac{GMm}{R^2}$

meanwhile Force $F = \frac{mv}{R^2}\\$

equating both the above equations we get

we get $v = \sqrt{\frac{GM}{R} }$

also $M = \frac {4\pi R^3 \rho} 3$

also, $\omega = \frac vR$

then $\frac{2 \pi} {1.57 \times 60 \times 60 sec} = \sqrt{\frac{G \frac {4\pi R^3 \rho} 3}{R} }$

solving the equation we get

$\rho = 2249.17 \frac{kg}{m^3}$

<h3>What is density?</h3>

The substance's mass per unit of volume is known as its density (volumetric mass density or specific mass).
The Latin letter D can also be used to represent density, however, the Greek character rho is more frequently used. Density is mathematically defined as mass divided by volume.
The density of a pure substance is equal to its mass concentration in numbers. Density varies widely among materials and may be important in relation to packaging, purity, and buoyancy.
The densest known elements under conditions of normal temperature and pressure are osmium and iridium.

To know more about Density with the given link

brainly.com/question/15164682

#SPJ4

8 0

1 year ago

. Draw a Cartesian coordinate system on a sheet of paper. On this Cartesian coordinate system, draw each vector to scale, starti

Triss [41]

Answer:

a) the first vector has magnitude 58 cm and the angle is 15 measured clockwise from the positive side of the x-axis

b) the second vector, the magnitude is 55.7 cm and the angle is 35 half from the negative side of the x-axis in a clockwise direction

c) the magnitude is 54.2 cm with an angle of 18 measured counterclockwise from the x-axis

Explanation:

For this exercise we draw a Cartesian coordinate system in this system: East coincides with the positive part of the x-axis and North with the positive part of the y-axis.

a) the first vector has magnitude 58 cm and the angle is 15 measured clockwise from the positive side of the x-axis

b) the second vector, the magnitude is 55.7 cm and the angle is 35 half from the negative side of the x-axis in a clockwise direction

c) the magnitude is 54.2 cm with an angle of 18 measured counterclockwise from the x-axis

In the attachment we can see the representation of the three vectors

8 0

2 years ago

Caldera volcanoes usually have a_____________ shape, _________slope, and a _____________composition.

saul85 [17]

large, downward, Ashy

5 0

2 years ago

What is the formula for momentum?

olasank [31]

The momentum of any object is (the object's mass) times (its speed).

8 0

2 years ago

May someone please help?

attashe74 [19]

Answer:

CONDUCTION

Energy transfers from one

object to another by direct

contact

CONVECTION

Energy transfers via the

movement of particles

within a liquid or gas.

RADIATION

Energy transfers by

electromagnetic waves as

they travel through space or

matter

Explanation:

6 0

2 years ago