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Yanka [14]
3 years ago
15

Identify which type of scientist would use spectroscopy for each purpose. Identification of the composition of the sun and stars

:
Determination of chemical bonds:
Prediction of the efficiency of possible laser materials:
Identification of harmful bacteria in food and environmental samples:
Physics
2 answers:
adelina 88 [10]3 years ago
7 0

Answer:

Identification of the composition of the sun and stars:  An astronomer

Determination of chemical bonds:  A chemist

Prediction of the efficiency of possible laser materials:  A physicist

Identification of harmful bacteria in food and environmental samples: A biologist

Explanation:

Alina [70]3 years ago
5 0

Answer:

1. Astronomer

2. A chemist

3. a physcist

4. a Biologist

Answers on edg

Explanation:

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In a periodic table a set of properties repeats from?
bogdanovich [222]

Answer;

Row to row

In a periodic table a set of properties repeats from row to row

Explanation;

In a periodic table, a set of properties repeats from row to row. This is called the periodic law. In the periodic table, the rows are called periods and the columns are called groups.

The modern periodic table is organized by increasing atomic number. The atomic mass unit is based on 1/12th the mass of a carbon-12 atom.  

The atomic mass of an element is the weighted average of the masses of an element’s isotopes.

8 0
3 years ago
Read 2 more answers
in a hydraulic garage the small piston has a radius of 5 cm and the large piston has radius of 15 cm what force must be applied
viktelen [127]

The force applied to small piston = 2.2 x 10³ N

<h3>Further explanation</h3>

Given

a radius of 5 cm and 15 cm

weight 20000 N

Required

Force applied

Solution

Pascal Law :

F₁/A₁=F₂/A₂

A₁ = π.5²

A₂ = π.15²

F₁/ π.5² cm² = 20000/π.15² cm²

F₁ = 2222.22 N⇒2.2 x 10³ N

5 0
3 years ago
What do we know about the relative strength of the electric field around each object?
Vsevolod [243]

Answer:

A charged object in an electric field experiences a force due to the field. The electric field strength, E, at a point in the field is defined as the force per unit charge on a positive test charge placed at that point.

Explanation:

6 0
3 years ago
What changes occur in the molecular magnet when magnet is demagnetized​
Olin [163]

Answer:

A magnet is demagnetized. There is a decrease in chemical potential energy. There is an increase in thermal energy. And there is an increase in energy in the form of demagnetization.

8 0
3 years ago
Dan is gliding on his skateboard at 2.00 m/s . He suddenly jumps backward off the skateboard, kicking the skateboard forward at
miss Akunina [59]

Answer:

The velocity of Dan is 1.13 m/s.

Explanation:

Given that,

Initial velocity of skateboard and Dan = 2.00 m/s

Velocity of skateboard = 7.00 m/s

Mass of Dan m= 40.0 kg

Mass of skateboard M= 7.00 Kg

Suppose How fast is Dan going as his feet hit the ground?

We need to calculate the initial velocity of Dan

Using conservation of momentum

(m+M)v_{i}=mv_{f}+Mv_{f}

Put the value into the formula

(40.0+7.00)\times2.00=40.0\times v_{i}+7.00\times7.00

v_{i}=\dfrac{(40.0+7.00)\times2.00-7.00\times7.00}{40.0}

v_{i}=1.13\ m/s

Hence, The velocity of Dan is 1.13 m/s.

4 0
3 years ago
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