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MA_775_DIABLO [31]

3 years ago

7

If a fast-moving car making a loud noise approaches and moves past the person, what will happen as the distance between the two

increases?

1 answer:

lesantik [10]3 years ago

8 0

The pitch of the sound of the car will appear to be <span>lower than the pitch of the car next to you</span>

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A charge of Q is fixed in space. A second charge of q was first placed at a distance r1 away from Q. Then it was moved along a s

topjm [15]

Answer:

$\Delta U = \frac{Qq}{4\pi\epsilon_0}(\frac{1}{r_2^2}-\frac{1}{r_1^2})$

Explanation:

The electrostatic potential energy is given by the following formula

$U = \frac{1}{4\pi\epsilon_0}\frac{q_1q_2}{r^2}$

Now, we will apply this formula to both cases:

$U_1 = \frac{1}{4\pi\epsilon_0}\frac{Qq}{r_1^2}\\U_2 = \frac{1}{4\pi\epsilon_0}\frac{Qq}{r_2^2}$

So, the change in the potential energy is

$\Delta U = U_2 - U_1 = \frac{Qq}{4\pi\epsilon_0}(\frac{1}{r_2^2}-\frac{1}{r_1^2})$

7 0

3 years ago

An example of a measure of the mass of an object would be

atroni [7]

Answer:

Balances and Scales

A balance compares an object with a known mass to the object in question. One example of a balance is the triple beam balance. The standard unit of measure for mass is based on the metric system and is typically denoted as kilograms or grams.

3 0

3 years ago

The properties of elements can be predicted by which of the following?

qaws [65]

Answer:

1 Answer. The Periodic Table can predict the properties of new elements, because it organizes the elements according to their atomic numbers. Creating new elements is not a simple process. Scientists use a particle accelerator to smash light atoms into a thin metallic foil that contains heavier atoms.

Explanation:

6 0

3 years ago

A piano of mass 852 kg is lifted to a height of 3.5 m. How much gravitational potential energy is added to the piano? Accelerati

slega [8]

Answer:

29223.6J

Explanation:

Given parameters:

Mass of Piano = 852kg

Height of lifting = 3.5m

Unknown:

Gravitational potential energy = ?

Solution:

The gravitational potential energy of a body can be expressed as the energy due to the position of a body;

G.P.E = mgh

m is the mass

g is the acceleration due to gravity

h is the height

Now insert the given parameters and solve;

G.P.E = 852 x 9.8 x 3.5 = 29223.6J

6 0

3 years ago

If the sum of all the forces acting on a car is zero, then the speed of the car?

Taya2010 [7]

Answer: If all forces acting on a car are zero, than the cars speed is zero since there are no forces to push or pull the car :)

Explanation:

7 0

2 years ago