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3 years ago

10

Which model best represents a pattern

2 answers:

Svetach [21]3 years ago

4 0

Answer:

A

Explanation:

olasank [31]3 years ago

3 0

Where is the options ?

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Which statement is true regarding flexibility? A. joint's range of motion cannot be maintained with age. b.A joint's range of mo

Alex777 [14]

<span>the statement that is true regarding flexibility is : b. a joint's range of motion will be lost if the joint is not used regularly. Our body is like a machine. If we not constantly heat it up, our body will be more prone to injury. We can see that the old people who lived within the tribe in the middle of the mountain are far stronger than the one who lived in the city.</span>

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3 years ago

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Medical x-rays, with a wavelength of about 10^(-10) m, can penetrate completely through your skin.

natulia [17]

Wavelength of X-rays = 10⁻¹⁰ m
Wavelength of UV = 1000 x 10⁻¹⁰
= 10⁻⁷ m

4 0

3 years ago

A 15kg ball accelerates at a rate of 3m/s/s. What force was required?

hoa [83]

Answer:

<h2>45 N</h2>

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question we have

force = 15 × 3

We have the final answer as

<h3>45 N</h3>

Hope this helps you

3 0

3 years ago

ad for the distance from the sun tothe earth is 1.5 x 10"m. how long does it take for light from ths sun to reach the eath? give

Alexandra [31]

Answer:

About 8.3 minutes

Explanation:

Use the formula for velocity as the distance covered by the light divided the time it takes: $[tex]velocity=\frac{distance}{time}$ [/tex]

Use the information about the speed of light in vacuum: $300000000 \frac{m}{s} = 3*10^{8} \frac{m}{s}$

and the information you are given regarding the distance between Sun and Earth: $1.5 * 10^{11} m$

to solve the first velocity equation for the unknown time "t":

$velocity=\frac{distance}{time} \\3*10^8\frac{m}{s} =\frac{1.5*10^11 m}{t} \\t=\frac{1.5*10^11 }{3*10^8} s= 500 s$

we can convert second into minutes by dividing by 60: 500 s = 500/60 minutes = 8.3333... minutes

5 0

3 years ago

A spring with k = 15.3 N/cm is initially stretched 1.81 cm from its equilibrium length. a) How much more energy is needed to fur

leonid [27]

Answer:

2.31J

Explanation:

the energy for a spring system is given by:

$E=\frac{1}{2} kx^2$

where $k$ is the spring constant: $k=15.3N/cm=1530N/m$ and $x$ is the distance stretched from the equilibrium position.

In the first case $x=1.81cm=0.0181m$

so the energy to stretch the spring 1.81cm is:

$K_{1}=\frac{1}{2} (1530N/m)(0.0181m)^2=0.25J$

and for the second case, the energy to stretch the spring 5.79cm:

$x=5.79cm=0.0579m$

$K_{1}=\frac{1}{2} (1530N/m)(0.0579m)^2=2.56J$

so to answer a) we must find the difference between these energies:

$2.56J-0.25J=2.31J$

6 0

3 years ago