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Bingel [31]
3 years ago
13

Match the following vocabulary terms to their definitions.1. the mass of a substance per unit volume density. 2. a proposed expl

anation for a scientific problem matter.3. standard metric unit of length control. 4. standard metric unit of mass meter. 5. anything that has mass and occupies space hypothesis. 6. a quantity in an experiment that remains un-changed or constant kilogram.
Physics
1 answer:
34kurt3 years ago
8 0

Explanation:

1. The mass of a substance per unit volume: Density

Higher density means the atoms are closely packed.

2. a proposed explanation for a scientific problem: Hypothesis

Before a problem is solved with an experimental or theoretical proof a hypothesis is given which is a probable solution for the problem. This hypothesis might be proved wrong at a later stage but it still works as a starting point to find a solution.

3. standard metric unit of length : Meter

The standard unit to measure the length.

4. standard metric unit of mass: Kilogram

The standard unit to measure the mass.

5. anything that has mass and occupies space: Matter

6. a quantity in an experiment that remains un-changed or constant: Control

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7. If 8 million kg of water flows over Niagara Falls each second, calculate the power available at the bottom of the falls.
Alexxx [7]

Answer:

The power will be "3.92×10⁹ Watts". A further explanation is given below.

Explanation:

The given values as per the question,

Rate,

= 8 million kg

Distance,

= 50 m

Gravity,

= 9.8 m/s²

As we know,

The power will be:

⇒ Power = Rate\times Distance\times  Gravity

On putting the values, we get

⇒             =  8\times 10^6\times 50\times 9.8

⇒             =3.92\times 10^9 \  Watts

7 0
2 years ago
A machine does 1500 joules of work in 30 second What is the power of the machine
lesya [120]
This is simple as power in watts is equal to joules per second so we can do 1500 joules divided by 30 seconds which equals 50 watts
8 0
3 years ago
list 8 countries which have launched satellites into space and also list the name of the satellite which was launched by the cou
Alja [10]
Launch-capable countries
Order Country Satellite(s)
1 Soviet Union Sputnik 1
2 United States Explorer 1
3 France Astérix
4 Japan Ohsumi
10 more rows
7 0
2 years ago
We want to find how much charge is on the electrons in a nickel coin. Follow this method. A nickel coin has a mass of about 4.2
monitta

Answer:

The number of atoms is N = 4.37*10^{22} \ atoms

Explanation:

From the question we are told that

                 The mass of coin  is m_n = 4.2g

                   Number of atom in one mole = n =6.02*10^{23} \ atoms

                   Molar mass of nickel M = 57.8g

Now the relation to obtain the number of atom in  the  nickel coin is

                        N = \frac{Mass \ of Nickel\ coin}{Molar \ mass\ of nickel }  * No\ of\atoms \ in \ \ one\  mole\ of\ nickel

                           = \frac{4.2}{57.8}* 6.02*10^{23}

                           =4.37 *10^{22} atoms

                 

     

8 0
3 years ago
An empty truck traveling at 10 km/h has kinetic energy. How much kinetic energy does it have when loaded so that its mass and it
Katena32 [7]

Answer:

8 time increase in K.E.

Explanation:

Consider Mass of truck = m kg and speed = v m/s then

K.E. = 1/2 ×mv²

If mass and speed both are doubled i.e let m₀ = 2m and v₀ = 2v then

(K.E.)₀ =  1/2 ×2m(2v)²

(K.E.)₀ = 8 (1/2 × mv²) = 8 × K.E.

7 0
3 years ago
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