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3 years ago

If you needed to find the force needed to pull a small car up a ramp it would be best to use -

Physics

2 answers:

krok68 [10]3 years ago

5 0

the answer would be a.a spring scale

Len [333]3 years ago

3 0

You can use a spring scale, however, if you have all the information needed for the formula, it is best to use it as it offers a more precise answer.

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At room temperature, good conductors of heat usually feel cool to the touch. This is because they conduct heat so quickly that w

sp2606 [1]

C. copper

Explanation:

Copper is the best conductor of heat from the given options. Plastic, wood and cotton are all poor conductors other wise known as insulators.

Metals are typically good conductors of heat.

they generally do not have a high specific heat capacity which implies that they get heated easily.
a good conductor allows heat to flow fast and it simultaneously loses heat readily too.
copper is a good conductor, when heat its perfectly allows heat to pass through
when heat is removed, it loses it very fast.

Learn more:

Conductors brainly.com/question/2500879

#learnwithbrainly

4 0

4 years ago

Two carts (m1 = m2 = 0.400 kg) are placed on an aluminum track. The first cart is pushed with the initial velocity of 1.5 m/s to

zloy xaker [14]

Answer:

That's just if it's a Flexible collision

5 0

3 years ago

How to get a + b on a graph

Nataly [62]

The first positively essential requirement is that
you absolutely have to know what 'a' and 'b' are.

I have no clue, so this is as far as I can go.

3 0

4 years ago

As your hand moves back and forth to generate longitudinal pulses in a spiral spring, your hand completes 3.19 back-and-forth cy

lesantik [10]

Explanation:

Since, it is given that one hand completes 3.19 vibrations in 8.46 sec. Therefore, in one second the number of vibrations will be as follows.

$\frac{3.19}{8.46}$

= 0.377 vibrations

Hence, frequency (f) = 0.38 Hz

Now, formula to calculate the speed is as follows.

v = $f \times \lambda$

or, $\lambda = \frac{v}{f}$

= $\frac{0.6 cm/s}{0.38}$

= 1.57 cm

Thus, we can conclude that the wavelength is 1.57 cm.

3 0

3 years ago

The Drude model uses Newton’s laws, which say that an electron in a constant electric field should experience constant accelerat

Troyanec [42]

Answer:

Electrons are influenced by internal forces.

-On the temperature, density of electrons per unit of volume and relaxation time.

-The temperature

Explanation:

The Drude model neglects interactions between electrons and ions and with themselves. Those interactions (by which we refer as electromagnetic forces) influence in the random movement and freedom of the electron. So, they could be more restricted or could influence in conductivity more.

The deduction of the resistivity comes from the Ohm's law, which states that the Electric field in the material is proportional to the current density of electrons by a constant, which is the resistivity itself. The equation goes as follows:

$\rho=\frac{m_e}{e^2n_e \tau }$

Where e refers to electron (or the charge of it), τ is the relaxation time (average time between collisions), m is the mass and n is the density of charges (electrons in this case) per volume. However, experimentally resistivity is also dependent on temperature, which actually influence the relaxation time. The thermal energy influence in the behavior of the electrons, making them collide with phonons, have more randomness and reduced mean free path.

6 0

4 years ago