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Alex_Xolod [135]
3 years ago
13

A student hypothesizes that a goldfish will be more active in a bowl that has red gravel than in a bowl with grey gravel. To tes

t this hypothesis, the student places on goldfish in a bowl with red gravel and another in a bowl with grey gravel. The color of the gravel is the blank variable in the experiment.
A. Control
B. Responding
C. Dependent
D. Independent

Need help ASAP!
Physics
2 answers:
madreJ [45]3 years ago
7 0

Answer: D. Independent

Explanation:

The independent variable is the variable which is used in an experimental setup. It can be changed or manipulated and even altered so as to determine it's effect over the dependent variable. The dependent variable changes due to the changes in the independent variable.

The color of the gravel is the independent variable. The effect of which is to be observed on the dependent variable that is the activeness of the goldfish.    

Aleonysh [2.5K]3 years ago
3 0
I believe that the answer is B responding, due to the fact that it’s testing the response of the fish to each gravel
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how much power is needed to lift a box with a force of 780 newtons over a distance of 2 meters in 45 seconds
-BARSIC- [3]

Answer:

<h2>34.67 W</h2>

Explanation:

Power is the rate at which work is done and can be found by using the formula

p =  \frac{w}{t}  \\

p is the power in Watts (W)

w is the workdone in joules

t is time in s

but workdone = force × distance

From the question

force = 780 N

distance = 2 m

workdone = 780 × 2 = 1560 N

Since we now have the value of workdone we can find the power

We have

p =  \frac{1560}{45}  = 34.6666666... \\

We have the final answer as

<h3>34.67 W</h3>

Hope this helps you

3 0
3 years ago
This is a problem about a child pushing a stack of two blocks along a horizontal floor. The masses of the blocks, and the coeffi
Rufina [12.5K]

Answer:

 N = 23.4 N

Explanation:

After reading that long sentence, let's solve the question

The contact force is the so-called normal in this case we can find it by writing the translational equilibrium equation for the y axis

            N - w₁ -w₂ =

            N = m₁ g + m₂ g

            N = g (m₁ + m₂)

let's calculate

            N = 9.8 (0.760 + 1.630)

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7 0
3 years ago
What is the weight of an object with a force of 35 pounds ?
Reika [66]

Answer:

Wouldn't it be 17.5. Force doubles in weight.

Explanation:

8 0
3 years ago
When a transformer is step down then
Vera_Pavlovna [14]

Answer:

Hey!

Your answer should be D!

Explanation:

In a transformer Np / Ns is called the voltage ratio. If Ns is less than Np then Vs is less than Vp. This is called a step-down transformer as the voltage is reduced.

(source from google.com!)

3 0
3 years ago
What is the mass of a truck if it is accelerating at a rate of 5 m/s2 and hits a parked car with a
sineoko [7]

Answer:

<h3>The answer is 2800 kg</h3>

Explanation:

The mass of the truck can be found by using the formula

m =  \frac{f}{a}  \\

f is the force

a is the acceleration

From the question we have

m =  \frac{14000}{5}  \\

We have the final answer as

<h3>2800 kg</h3>

Hope this helps you

5 0
3 years ago
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