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Elina [12.6K]
3 years ago
12

What will decrease over time as a result of improved

Physics
2 answers:
Semmy [17]3 years ago
5 0

Answer: b

Explanation:

bagirrra123 [75]3 years ago
4 0

Answer:

C

Explanation:

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Now imagine a person dragging a 50 kg box along the ground with a rope, as
ANTONII [103]

Answer:

The coefficient of static friction between the box and floor is, μ = 0.061

Explanation:

Given data,

The mass of the box, m = 50 kg

The force exerted by the person, F = 50 N

The time period of motion, t = 10 s

The frictional force acting on the box, f = 30 N

The normal force on the box, η = mg

                                                     = 50 x 9.8

                                                     = 490 N

The coefficient of friction,

                            μ = f/ η

                               = 30 / 490

                               = 0.061

Hence, the coefficient of static friction between the box and floor is, μ = 0.061

7 0
4 years ago
Which statement about the ellipsis is true?. . I. An ellipsis indicates the omission of a word or words.. . II. It is appropriat
V125BC [204]
<span>"the true statement is: An ellipsis indicates the omission of a word or word Here is an example on the usage of ellipsis: I don't know . . . i'm not even sure how i feel about him. The dots acted as an interlude that connected one response with another statement</span>
7 0
3 years ago
Read 2 more answers
A ball is at rest on the floor of a car moving at a constant velocity. What will happen to the ball if the car swerves suddenly
Elanso [62]
The ball will go suddenly to the right
4 0
4 years ago
Male Rana catesbeiana bullfrogs are known for their loud mating call. The call is emitted not by the frog's mouth but by its ear
Sidana [21]

Answer:

The amplitude of the eardrum's oscillation is 6.65×10^-13 m.

Explanation:

Given data:

The sound has a frequency of 262 Hz

The sound level is 84 dB

The air density is 1.21 kg/m^3

The speed of sound is 346 m/s

Solution:

As, Intensity of sound is given by,

I = Io×10^(s/10 db)

I = 2×π^2×ρ×v×f^2×Sm^2

Thus,

Sm = √(Io×10^(s/10 db)) / √( 2×π^2×ρ×v×f^2)

Now, put the values,

Sm = √( 10^-12 × 10^(84/10) ) / √( 2×(3.14)^2×1.21×346×(262)^2 )

Sm = √(2.51×10^-4 / 5.66×10^8)

Sm = √0.443×10^-12

Sm = 6.65×10^-13 m.

8 0
3 years ago
What is the year in which j.J. Thomson discovered the electron?
kow [346]

1897 Because he was doing an experiment at that time .

3 0
3 years ago
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