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baherus [9]
3 years ago
14

A student measured the power of a motor operating at different temperatures. The student recorded a total of 11 measurements, on

e at each two degree interval between 10 degrees Celsius and 30 degrees Celsius. Which change in the procedure would most improve the validity of conclusions based on this investigation?
A. Decreasing the range of the IV

B. Repeating the experiment several times

C. Increasing the # of variables

D. Producing a graph of numerical observations
Physics
1 answer:
8_murik_8 [283]3 years ago
8 0
The answer is d for sure
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An ear squeeze occurs when: Select one: The pressure inside the middle ear space is greater than ambient (surrounding) pressure.
matrenka [14]

B. An ear squeeze occurs when the pressure inside the middle ear space is less than ambient (surrounding) pressure.

<h3>When external ear squeeze occurs</h3>

External ear squeeze occurs when gas trapped in the external ear canal remains at atmospheric pressure while the external water pressure increases during descent.

Thus, we can conclude that, an ear squeeze occurs when the pressure inside the middle ear space is less than ambient (surrounding) pressure.

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6 0
2 years ago
The density of lead is 11.3 g/cm 3. What mass of lead is required to make a 1 cm 3 fishing sinker?
Aliun [14]

Answer:

11.3 g

Explanation:

given,

density of the lead = 11.3 g/cm³

volume = 1 cm³

mass of the lead = ?

we know,

density=\dfrac{mass}{volume}

mass = volume x density

mass = 1 x 11.3

mass = 11.3 g

hence, the mass of the lead is equal to 11.3 g

5 0
3 years ago
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In the circuit shown in the figure, four identical resistors labeled a to d are connected to a battery as shown. s1 and s2 are s
Fed [463]
A.nothing will happen
4 0
4 years ago
A toy spacecraft is launched directly upward. When the toy reaches its highest point, a spring is released and the toy splits in
Murljashka [212]

Answer:

A

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and because both are at the same height above the ground, they will take the same time to reach the ground.

The speed of 0.08kg will be less than 0.02 kg, let v be the speed of 0..02kg, then speed of 0.08kg V is

0.02v - (0.08)V = 0

V = 0.02 v/ 0.08 = v/4

The speed of 0.08 kg = v/4

The speed of 0.08 kg is less than 0.02kg.

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8 0
3 years ago
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Nookie1986 [14]

Answer: work is the pressure acting through the change in volume

Explanation:

In the same way that work is defined as force operating over a distance,  work is the pressure acting through the change in volume.   Pressure is comparable to force in pressure–volume work, while volume is analogous to distance in the classic definition of work.

4 0
2 years ago
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