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liq [111]
3 years ago
10

Noah drops a rock with a density of 1.73 g/cm3 into a pond. Will the rock float or sink?

Physics
2 answers:
Hatshy [7]3 years ago
5 0

Answer:

The rock will sink because it is more dense than water.

Explanation:

Katarina [22]3 years ago
3 0

Explanation:

Substances with their density less than that of water which is 1 g/cm³ will float on it whiles those greater than that of water will sink into the water

From the question the density of the object is greater than that of water so the object will sink into the water

Hope this helps you

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A particle oscillates in simple harmonic motion, with amplitude A and period T. The particle starts from position x = A. What is
frozen [14]

Answer:

i guess it is D because,

y = A sin(wt)

w = \frac{2\pi }{T} and t = 3T/ 2

now, Y = A sin ( \frac{2\pi }{T} X \frac{3T}{2})

so, Y = 0radian

Explanation:

8 0
3 years ago
A certain parallel-plate capacitor is filled with a dielectric for which κ = 6.56. The area of each plate is 0.0830 m2, and the
mafiozo [28]

Answer:

4.86\times 10^{-7}\ J

Explanation:

Given:

Dielectric of the medium between the plates (k) = 6.56

Area of eac plate (A) = 0.0830 m²

Separation between the plates (d) = 1.95 mm = 0.00195 m [1 mm = 0.001 m]

Maximum electric field (E_{max}) = 202 kN/C = 202000 N/C [1 kN = 1000 N]

Permittivity of space (ε₀) = 8.854 × 10⁻¹² F/m

The maximum potential difference across the plates of the capacitor is given as:

V_{max}=E_{max}d\\\\V=(202000\ N/C)(0.00195\ m)\\\\V=393.9\ V

Now, capacitance of the capacitor is given as:

C=\dfrac{k\epsilon_0A}{d}\\\\C=\frac{6.56\times 8.854\times 10^{-12}\ F/m\times 0.0830\ m^2}{0.00195\ m}\\\\C=2.47\times 10^{-9}\ F

The maximum energy stored in the capacitor is given as:

U_{max}=\frac{1}{2}CV_{max}^2\\\\U_{max}=\frac{1}{2}\times (2.47\times 10^{-9}\ F)\times  393.9\ V\\\\U_{max}=4.86\times 10^{-7}\ J

Therefore, the maximum energy that can be stored in the capacitor is 4.86\times 10^{-7}\ J

6 0
2 years ago
The center of gravity of a basketball is located _______.
zhenek [66]

Answer:

at its centre

Explanation:

The centre of gravity is a point inside the body where entire weight os the body is said to be concentrated. For geometrical symmetric bodies it lies at the geometric centre of the body.

The base ball is a spherical body, so its centre of gravity lies at its centre.

5 0
3 years ago
Which of these statements about resistance is true? Choose the best answer.
bonufazy [111]

'C' and 'D' are the same statement, and none of the 3 choices
is good.

Electrical energy is produced in a generator, a solar panel, or
a battery, not in things with resistance.

From the generator or battery, current flows through a circuit of
one or more components.

The greater the resistance of a component, the more energy is
LOST as the current flows through it.  The component dissipates
the energy in the form of heat.

8 0
3 years ago
Read 2 more answers
An optical disk drive in a computer can spin a disk at up to 10,000 rpm. If a particular disk is spun at 5050 rpm while it is be
Ber [7]

Answer:

α = 1215.71 rad/s²

Explanation:

The angular acceleration of an object is defined as the time rate of change of angular velocity of he object. The formula for the angular acceleration of an object is given as follows:

α = (ωf - ωi)/Δt

where,

α = angular acceleration of the disk = ?

ωf = Final Angular Velocity = 0 rad/s (Since disk finally stops)

ωi = Initial Angular Velocity = (5050 rpm)(2π rad/rev)(1 min/60 s)

ωi = 528.83 rad/s

Δt = time interval = 0.435 s

Therefore,

α = (0 rad/s - 528.83 rad/s)/(0.435 s)

α = - 1215.71 rad/s²

here, negative sign indicates that the direction of acceleration is opposite to the direction of angular velocity or the angular motion. So, the magnitude of acceleration will be:

<u>α = 1215.71 rad/s²</u>

4 0
3 years ago
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