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Fudgin [204]
3 years ago
11

If a sample of an unknown material with a mass of 0.68 g and a volume of 0.8 cm3 is dropped

Physics
1 answer:
Anna71 [15]3 years ago
4 0
As the density of the unknown substance is 0.68g/0.8ml = 0.85g/ml, it is less dense than the maple syrup at 1.33g/ml and will float.
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the base of a rectangular vessel measure 10m by 18cm. water is poured into a depth of 4cm. (a) what is the pressure on the base?
Alex787 [66]

Answer:

a) P =392.4[Pa]; b) F = 706.32[N]

Explanation:

With the input data of the problem we can calculate the area of the tank base

L = length = 10[m]

W = width = 18[cm] = 0.18[m]

A = W * L = 0.18*10

A = 1.8[m^2]

a)

Pressure can be calculated by knowing the density of the water and the height of the water column within the tank which is equal to h:

P = density * g *h

where:

density = 1000[kg/m^3]

g = gravity = 9.81[m/s^2]

h = heigth = 4[cm] = 0.04[m]

P = 1000*9.81*0.04

P = 392.4[Pa]

The force can be easily calculated knowing the relationship between pressure and force:

P = F/A

F = P*A

F = 392.4*1.8

F = 706.32[N]

4 0
3 years ago
The period of a 400 hertz sound wave is ___ second
Oksi-84 [34.3K]

Answer:

0.0025 sec

Explanation:

Period = 1 / frequency = 1/400 = 0.0025 sec

3 0
2 years ago
Read 2 more answers
Why is there more pressure the deeper you go in water?
Oduvanchick [21]

I think because water gives pressure and if u go even deeper theres more pressure

4 0
2 years ago
A scientist hypothesizes that the temperature at which an alligator's egg is incubated will determine whether the alligator will
WINSTONCH [101]

Answer:

  • The independent variable its A, the temperature.

Explanation:

There are two variable in this (mental) experiment. The temperature and the gender of the alligator.

The temperature its the independent variable, its the one we can control using the incubator.

The gender of the alligator, its hypothesized, will be determined by the temperature, so, its the dependent variable in our hypothesis.

The incubator will be used in all the eggs of the experiment, so, its not a variable.

The male alligators its one of the possible outcomes of the experiment. Again, not a variable.

8 0
4 years ago
A 40.0-μFcapacitor is connected across a 60.0 Hz generator. An inductor is then connected in parallel with the capacitor. What i
amm1812

Answer:

The value of the inductance is 175.9 mH.

Explanation:

Given that,

Capacitor C= 40.0\ \muF

Frequency = 60.0 Hz

The inductor and capacitor is connected in parallel, the voltage across each of these elements is the same.

We have,

V_{L}=V_{C}

Using ohm's law

I_{rms}\times X_{L}=I_{rms}\times X_{C}

X_{L}=X_{C}

2\pi f L=\dfrac{1}{2\pi f C}

L=\dfrac{1}{4\pi^2\times f^2\times C}

Put the value into the formula

L=\dfrac{1}{4\times\pi^2\times60.0^2\times40\times10^{-6}}

L=0.1759\ H

L=175.9\times10^{-3}\ H

L=175.9\ mH

Hence, The value of the inductance is 175.9 mH.

5 0
4 years ago
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