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4 years ago

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Which two factors does the power of a machine depend on? А. work and distance B.. force and distance C. work and time D. time an

d distance?

1 answer:

Ivahew [28]4 years ago

6 0

$Hello$ $There!$

$AnimeVines$ $is$ $here!$

The answer is...

C. Work and time.

$HopeThisHelps!!$

$AnimeVines$

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What can be concluded about the spread of the histogram? A histogram titled Maria's Monthly Jogging has miles run on the x-axis

Aleonysh [2.5K]

Answer:

I think it is A

Explanation:

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3 years ago

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In an arcade game a 0.135 kg disk is shot across a frictionless horizontal surface by compressing it against a spring and releas

ioda

Answer:

v=2.42m/s

Explanation:

We use the energy conservation theorem in order to solve the problem. The energy when the spring is compressed is equal at the energy when the disk leaves the spring:

$E_{initial}=E{final}\\E_{k-initial}+E_{p-initial}=E_{k-final}+E_{p-final}\\0+\frac{1}{2}kx^2=\frac{1}{2}mv^2+0$

At the beginning the initial energy is totally potential, energy linked to the compressed spring. At the end the energy is totally kinetics

We solve the equation in order to find the speed.

k=162 N/m

x=7 cm=0.07m

m=0.135 kg

$v=x*\sqrt{k/m}=0.07*\sqrt{162/0.135}=2.42m/s$

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3 years ago

Need help on question b

ZanzabumX [31]

The answer is A.

A positive charge’s electric field pushes out.

Hope this helps! -Avenging

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3 years ago

A 3-kg ball is thrown with a speed of 8 m/s at an unknown angle above the horizontal. The ball attains a maximum height of 2.8 m

Alina [70]

Answer:

13.5 J

Explanation:

mass of ball, m = 3 kg

maximum height, h = 2.8 m

initial speed, u = 8 m/ s

Angle of projection, θ

use the formula of maximum height

$H = \frac{u^{2}Sin^{2}\theta }{2g}$

$2.8 = \frac{8^{2}Sin^{2}\theta }{2\times 9.8}$

Sin θ = 0.926

θ = 67.8°

The velocity at maximum height is u Cosθ = 8 Cos 67.8 = 3 m/s

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$K=\frac{1}{2}mv^{2}$

K = 0.5 x 3 x 3 x 3

K = 13.5 J

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4 years ago

What visible wavelengths will be constructively reflected if the film is surrounded by air on both sides?

Ronch [10]

The visible wavelengths constructively reflected by the film when it is surrounded by air on both sides can be calculated using the equation:

lambda = 2t*(n2/n1)

where:

lambda is the wavelength,
t is the thickness, and;
n1 and n2 are indexes of refraction

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3 years ago