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2 years ago

Dalila plans an experiment to examine plant growth. She

Physics

2 answers:

Harrizon [31]2 years ago

8 0

Answer:

Its A. On Edg

Explanation:

Hoochie [10]2 years ago

4 0

Answer:

The answer is: a column that shows how the dependent variable changes.

Explanation:

An experiment is a process that is carried out by a researcher in order to find out whether his hypothesis is valid. In order to conduct a proper experiment, it is very important to include both the "dependent" and "independent" variables.

A dependent variable refers to the variable that changes in response to the presence of an independent variable. On the contrary, an independent variable is the variable (such as factors) that is being changed in order to control the experiment.

Remember that independent variables do not depend on other factors. Thus, it is only the dependent variable's change that matters in an experiment.

This is the reason why Dalila needs to have a column that shows the dependent variable changes (and not the independent variable changes).

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The Milky Way measures _________ light years in diameter.

Snowcat [4.5K]

Answer:

The Milky Way is about 1,000,000,000,000,000,000 km (about 100,000 light years or about 30 kpc) across. The Sun does not lie near the center of our Galaxy. It lies about 8 kpc from the center on what is known as the Orion Arm of the Milky Way.

7 0

2 years ago

A boat floats south on the Amazon River at a speed of 6 m/s. The boat and

EleoNora [17]

Explanation:

Take south to be negative.

a. Momentum is mass times velocity.

p = mv

p = (540 kg) (-6 m/s)

p = -3240 kg m/s

p = 3240 kg m/s south

b. Impulse = change in momentum

J = Δp

Since the mass is constant:

J = mΔv

J = (540 kg) (-4 m/s − (-6 m/s))

J = 1080 kg m/s

J = 1080 kg m/s north

7 0

3 years ago

A force of 880 newtons stretches a spring 4 meters. A mass of 55 kilograms is attached to the end of the spring and is initially

zysi [14]

Answer:

x(t) = -8sin2t

Explanation:

See the attachment for solution

From my solving, we can deduce that w² = 4, and thus, w = 2

Therefore, the general solution is

x(t) = c1 cos2t + c2 sin2t

Considering the final variable, we can conclude that

x(0) = 0

x'(0) = -8 m/s

The final solution, thus

x(t) = -8sin2t

4 0

2 years ago

What is the intensity in W/m2 of a laser beam used to burn away cancerous tissue that, when 85.0% absorbed, puts 470 J of energy

Advocard [28]

Answer:

26036485.6433 W/m²

Explanation:

E= Energy = 470 J

t = Time = 4 seconds

d = Diameter = 2.6 mm

Power is given by

$P=\dfrac{E}{t}$

Intensity is given by

$I=\dfrac{P}{\pi r^2}\\\Rightarrow 0.85I=\dfrac{E}{t\dfrac{\pi}{4} d^2}\\\Rightarrow I=\dfrac{470}{0.85\times 4\times \dfrac{\pi}{4}\times (2.6\times 10^{-3})^2}\\\Rightarrow I=26036485.6433\ W/m^2$

The intensity of the laser beam is 26036485.6433 W/m²

8 0

3 years ago

Most of the stars in the Milky Way will end their lives as

umka21 [38]

Most of the stars in the Milky Way will end their lives as white dwarfs

4 0

2 years ago

Read 2 more answers