All categories

3 years ago

Which statement below is false? A) Weight depends on the force of gravity.

Physics

2 answers:

Scilla [17]3 years ago

5 0

I think it's the letter Did (this has to be 20 characters long) it would be Different or would be D

jenyasd209 [6]3 years ago

4 0

The answer would be D

You might be interested in

An elevator is moving is an upwards

Minchanka [31]

Answer:

The elevator's free-body diagram has three forces, the force of gravity, a downward normal force from you, and an upward force from the tension in the cable holding the elevator. The combined system of you + elevator has two forces, a combined force of gravity and the tension in the cable.

Explanation:

6 0

3 years ago

Movement of a molecule against its concentration gradient can occur through Select one or more: a. facilitated diffusion b. pass

uranmaximum [27]

Answer:

The answer to your question is:

Explanation:

There are two kinds of cell transport passive transportation and active transportation.

Passive transportation does not need energy because molecules move from higher concentration to lower concentration.

Active transportation needs energy because molecules moves against concentration.

a. facilitated diffusion It's an example of passive transportation so this answer is wrong.

b. passive transport Molecules move in favor of concentration so this answer is wrong.

c. osmosis is another example of passive transport so this answer is wrong.

d. simple diffusion it's another example of passive transport, so it's wrong this answer.

e. active transport this is the right answer.

5 0

3 years ago

What is a conversion factor?

rosijanka [135]

Answer:

A ratio of equivalent units

Explanation:

A conversion factor is a ratio of equivalent units and depends on which units are to be converted.

For example we want to convert 275 [mm] to inches, so we have to find the right conversion factor to allow us to work that conversion.

275 [mm] = inches = ?

$275 [mm] * \frac{1in}{25.4mm} = 10.82 [in]$

In this case the ratio is 1/25.4 = 0.039 [in/mm]

4 0

3 years ago

A cardinal (Richmondena cardinalis) of mass 4.20×10−2 kg and a baseball of mass 0.146 kg have the same kinetic energy. What is t

bekas [8.4K]

Explanation:

It is given that,

Mass of cardinal, $m_c=4.2\times 10^{-2}\ kg$

Mass of baseball, $m_b=0.146\ kg$

Both cardinal and baseball have same kinetic energy. We need to find the ratio of the cardinal's magnitude $p_c$ of momentum to the magnitude $p_c$ of the baseball's momentum.

$E_c=E_b$

Kinetic energy is given by, $E=\dfrac{p^2}{2m}$

$\dfrac{p_c^2}{2m_c}=\dfrac{p_b^2}{2m_b}$

$(\dfrac{p_c}{p_b})^2=\dfrac{m_c}{m_b}$

$\dfrac{p_c}{p_b}=\sqrt{\dfrac{m_c}{m_b}}$

$\dfrac{p_c}{p_b}=\sqrt{\dfrac{4.2\times 10^{-2}}{0.146}}$

So, $\dfrac{p_c}{p_b}=\dfrac{53}{100}$

So, the ratio of cardinal's magnitude of momentum to the magnitude of the baseball's momentum is 53 : 100

6 0

3 years ago

Vision is blurred if the head is vibrated at 29 Hz because the vibrations are resonant with the natural frequency of the eyeball

Sidana [21]

Answer:

255.4 N/m

Explanation:

We can consider the system eyeball-attached to the musculature as a mass-spring system in simple harmonic motion, whose frequency of oscillation is given by

$f=\frac{1}{2\pi}\sqrt{\frac{k}{m}}$

where in this case, we know:

f = 29 Hz is the frequency of oscillation

k is the spring constant, which is unknown

m = 7.7 g = 0.0077 kg is the mass of the eyeball

Solving the equation for k, we find the spring constant of the musculature attached to the eyeball:

$k=(2\pi f)^2 m=(2 \pi (29 Hz))^2 (0.0077 kg)=255.4 N/m$

6 0

3 years ago