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2 years ago

Choose which statements correctly identify the relationship of mass volume and density by clicking the sentence

1 answer:

7 0

Mass is the amount of matter present in an object, it also determines the strength of the mutual gravitational force of an object to another object. Volume is the amount of space that the object occupies. Meanwhile, density is the amount of mass per volume of an object, with that formula, we can say that density is directly proportional to the mass but indirectly proportional to the volume.

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When light hits the boundary between two different materials, it can undergo when light hits the boundary between two different

Rashid [163]

When light hits the boundary between two different materials, it can undergo both reflection and refraction.

Reflection is the change in the direction of the wave that strikes the boundary between two materials. It involves a change in the direction of waves when they clash with an obstacle.

Refraction involves the change in the direction of waves as they move from one medium to another followed by a change in speed and wavelength (this second medium should have different permitivity for the light to change its initial properties.)

3 0

2 years ago

Read 2 more answers

Suppose you first walk 12.0 m in a direction 20 owest of north and then 20.0 m in a direction 40.0osouth of west. How far are yo

alexgriva [62]

Answer:

R=19.5m

$\theta$ = 4.65° S of W

Explanation:

Refer the attached fig.

displacement of the x and y components

x-component displacement is ( $R_{x}$ ) = $A_{x}+B_{x}$

= A $\sin$ (20°) + B $\cos$ (40°)

= -12.0 $\sin$ (20°) + 20.0 $\cos$ (40°)

= -19.425m

x-component displacement is ( $R_{y}$ ) = $A_{y}+ B_{y}$

= A $\cos$ (20°) - B $\sin$ (40°)

= 12.0 $\cos$ (20°) - 20.0 $\sin$ (40°)

= -1.579

resultant displacement

∴

R = $\sqrt{R_{x}^{2} +R_{y}^{2} } }$

= $\sqrt{(-19.425)^{2}+(-1.579)^{2} }$

=19.5m

$\theta$ = $\tan^{-1}\left | \frac{R_{x}}{R_{y}} \right |$

$\theta$ = $\tan^{-1}\left | \frac{1.579}{19.425} \right |$

$\theta$ = 4.65° S of W

6 0

2 years ago

A 2.5 g marshmallow is placed in one end of a 40 cm pipe, as shown in the figure above. A person blows into the left end of the

frosja888 [35]

Answer:

Your answer would be

A person 40 cm- blows into the left end of the pipe to eject the marshmallow from the right end. ... A strain of sound waves is propagated along an organ pipe and gets reflected from an. play · like-icon ... The velocity of sound in air is 340ms^(-1). ... The two pipes are submerged in sea water, arranged as shown in figure. Pipe.Explanation:

I belive this is the answer sorry if im wrong!

3 0

2 years ago

Read 2 more answers

Susan and Hannah are each riding a swing. Susan has a mass of 25 kilograms, and Hannah has a mass of 30 kilograms. Susan’s swing

Charra [1.4K]

Answer:

Kinetic energy is given by:

K.E. = 0.5 m v²

Susan has mass, m = 25 kg

Velocity with which Susan moves is, v = 10 m/s

Hannah has mass, m' = 30 kg

Velocity with which Hannah moves is, v' = 8.5 m/s

Kinetic energy of Susan:

0.5 m v² = 0.5 × 25 kg × (10 m/s)² = 1250 J

Kinetic energy of Hannah:

0.5 m v'² = 0.5 × 30 kg × (8.5 m/s)² = 1083.75 J

Susan's kinetic energy is 1250 J and Hannah's kinetic energy is 1083.75 J.

Since kinetic energy is dependent on mass and square of speed. Thus, speed has a greater effect than mass. As it is evident from the above example. Susan has greater kinetic energy due to higher speed than Hannah.

4 0

2 years ago

Segmented mirrors sag under their own weight. their optical shape must be controlled by computer-driven thrusters under the mirr

madam [21]

Active Optics.

Hope that helps, Good luck! (:

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2 years ago