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2 years ago

What are three types of variables in a controlled experiments?

Physics

1 answer:

blsea [12.9K]2 years ago

7 0

The answers to your question are,

Independent, Dependent, and Control.

-Mabel <3

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Which Period 2 element would you expect to have the highest electrical and

evablogger [386]

The answer is c nitrogen thx me later

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3 years ago

Heat likes to remain ONMFRIU ← Whats that unscrambled?

OlgaM077 [116]

So the question is how does heat prefer to remain and to unscramble the letters ONMFRIU. The unscrambled letters mean: UNIFORM. The heat likes to remain uniform because thermodynamic systems always tend to reach thermal equilybrium after some period of time that is specific for each system.

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3 years ago

In 2007, michael carter (u.s.) set a world record in the shot put with a throw of 24.77 m. what was the initial speed of the sho

Serga [27]

The initial speed of the shot is 15.02 m/s.

The Shot put is released at a height y from the ground with a speed u. It is released at an angle θ to the horizontal. In a time t, the shot put travels a distance R horizontally.

Pl refer to the attached diagram.

Resolve the velocity u into horizontal and vertical components, u ₓ=ucosθ and uy=u sinθ. The horizontal component remains constant in the absence of air resistance, while the vertical component varies due to the action of the gravitational force.

Write an expression for R.

$R=u_xt=(ucos \theta)t$

Therefore,

$t=\frac{R}{ucos\theta} .......(1)$

In the time t, the net displacement of the shotput is y in the downward direction.

Use the equation of motion,

$y=u_yt-\frac{1}{2}gt^2=(usin\theta) t-\frac{1}{2}gt^2$

Substitute the value of t from equation (1).

$y=(ucos\theta)(\frac{R}{ucos\theta} )-\frac{1}{2} g(\frac{R}{ucos\theta} )^2\\ =Rtan\theta-(\frac{gR^2}{2u^2cos^2\theta} )$

Substitute -2.10 m for y, 24.77 m for R and 38.0° for θ and solve for u.

$y=Rtan\theta-(\frac{gR^2}{2u^2cos^2\theta} )\\ (-2.10m)=(24.77 m)(tan38.0^o)-\frac{(9.8 m/s^2)(24.77m)^2}{2u^2(cos38.0^o)^2} \\ u^2=225.71(m/s)^2\\ u=15.02m/s$

The shot put was thrown with a speed 15.02 m/s.

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2 years ago

You have a chart that illustrates a series of species with their common ancestor. This chart is a

emmasim [6.3K]

The answer is *C. Cladogram*.

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3 years ago

a 40 kilogramstudent runs up a staircase to a floor that is 5.0 meters higher than her starting point in 7.0 seconds. the studen

Wittaler [7]

When she reaches the top, she has more potential energy than she had at the bottom.

   Potential energy = (mass) x (gravity) x (height)

   = (40 kg) x (9.8 m/s²) x (5 m)

   = 1,960 more joules .

   Power = (energy) / (time)

   = (1,960 joules) / (7 seconds)

   = 280 watts

(about 0.375 horsepower)

3 0

2 years ago