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choli [55]
3 years ago
5

Holly measures the mass and the volume of metal block. Given this information, what can Holly calculate about the block?

Physics
2 answers:
Julli [10]3 years ago
6 0
You can calculate the mass by multiplying the density with the volume. So if you know the volume and the mass. You can calculate the density by doing mass ÷ volume
natima [27]3 years ago
6 0

<u>Answer:</u> Holly can calculate the density of the block for the given information.

<u>Explanation:</u>

For the given options:

  • <u>Option A:</u> Acceleration

Acceleration is defined as the rate of change of velocity with respect to time. S.I. unit of acceleration is m/s^2 The equation used to calculate acceleration is:

a=\frac{v}{t}

  • <u>Option b:</u> Density

Density of an object is defined as the ratio of its mass and volume. The chemical equation representing density of an object is:  

\text{Density of object}=\frac{\text{Mass of object}}{\text{Volume of object}}

  • <u>Option c:</u> Force

Force is defined as the push or pull on an object with some mass that causes change in its velocity.

It is also defined as the mass multiplied by the acceleration of the object.

Mathematically,

F=ma

  • <u>Option d:</u> Velocity

Velocity is defined as the rate of change of position with respect to time. The equation used to calculate velocity is:

v=\frac{d}{t}

Hence, Holly can calculate the density of the block for the given information.

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A metal ball attached to a spring moves in simple harmonic motion. The amplitude of the ball's motion is 11.0 cm, and the spring
german

Answer:

a)0.674 kg b) 2.2 s c) 0.9 m/s²

Explanation:

The amplitude of the ball (xo) = 11.0cm, half way between its equilibrium point its maximum displacement x = 11 cm / 2 = 5.5 cm = 5.5 / 100 in meters = 0.055 meters, speed at this point = 27.2 cm /s = (27.2 / 100) in m/s = 0.272 m/s,

spring constant K = 5.5 N/m

a) The mass of the ball (m) can be calculated using the formula below

v =√ (x²o - x²)K/m

make m subject of the formula

v² = (xo² - x²) K/m

m = K ( xo² - x²) / v²

m = 0.674kg

b) The period of the oscillation can be calculated by the following formula

T = 2π√ (m /K)

substitute the values into the formula

T = 2 × 3.142 × √ (0.674/ 5.5) = 2.2s

c) The maximum acceleration of the ball which occurs at the maximum displacement of the ball can be calculated by the following formula

a = K / m × x ( maximum displacement of the body) = 5.5 / 0.674 × 0.11 = 0.9 m/s²

7 0
3 years ago
A metal wire of resistance R is cut into five equal pieces that are then placed together side by side to form a new cable with a
Alina [70]

Answer:

R / 25

Explanation:

Let the initial length of the wire is L and its resistance is R.

Now the length is cut into 5 equal parts.

The resistance of a wire is directly proportional to the length of the wire, thus, the resistance of each portion of the wire is R/5.

Now the five pieces are connected in parallel combination, the equivalent resistance is

\frac{1}{R_{eq}}=\frac{5}{R}+\frac{5}{R}+\frac{5}{R}+\frac{5}{R}+\frac{5}{R}

R_{eq}=\frac{R}{25}

Thus, the resistance of the new cable is R / 25.

8 0
3 years ago
Why is it called a building if it’s already built
Jet001 [13]

Answer:

Because the 'ing' in the English language is added to certain verbs to make them nouns.

Explanation:

Hope this helps :D

6 0
3 years ago
Read 2 more answers
Which best describes the definition for the atomic mass of an element?
kipiarov [429]

Answer:

It is a weighted average of the masses of an element’s isotopes.

Explanation:

The best definition of the atom mass of an element is that it is a weighted average of the masses of an element's isotopes.

  • Isotopes of an element have the same electronic configuration but differ in only their masses.
  • The atomic mass of an element can be derived from the geonormal abundances of this isotopes.
  • It is the average of all the isotopes of an element.

 Atomic mass  = ∑m_{i} a_{i}

where m_{i} is the mass of the isotope i

            a_{i} is the abundance of the isotope i

6 0
4 years ago
What is the volume of 220 grams of an object with a density of 55/cm3
Naddika [18.5K]

Every cm³ of that substance has 55 grams of mass
packed into it.  That's what density means.

So how many cm³ do you need in order to stuff in
220 grams ?

How many 55s make 220 ?

         220/55 = 4 .

If you have  4 cm³  of space available, you can pack
the whole 220 grams into that volume, because each cm³
will hold  55 grams, and  4 x 55 = 220 .

5 0
4 years ago
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