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Travka [436]
3 years ago
11

The element copper has 29 protons. What is the atomic number of copper?

Physics
1 answer:
photoshop1234 [79]3 years ago
8 0
The number of protons an element has is its atomic number so the atomic number would be 29
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The range of all electromagnetic radiation is known as the
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B.) <span>The range of all electromagnetic radiation is known as the "Electromagnetic Spectrum"

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3 years ago
When a wire with a current is placed in a magnetic field, electrical energy is transformed into mechanical energy
babymother [125]

Answer:

TRUE

Explanation:

When a wire with a current is placed in a magnetic field, electrical energy is transformed into mechanical energy. The transformation happens when the magnetic field produced by the current causes the wire to move.

8 0
3 years ago
How much work is required to turn an electric dipole 180° in a uniform electric field of magnitude E = 46.0 N/C if the dipole mo
chubhunter [2.5K]

Answer:

W=1.22*10^{-23}J

Explanation:

Torque and energy of an electric dipole in an electric field we find:

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3 0
3 years ago
what is the pressure on a circular helipad of diameter 100 m on which a helicopter of weight 40,000 N is landing. *
Luba_88 [7]

Answer:

5.09 Pa

Explanation:

Area of the circle = πr²

The diameter is given, so 100/2 = 50 m is the radius.

π x 50² = 7854 m²

Pressure = force/area

Pressure = 40000/7854

Pressure = 5.09 Pa

Hope this helps!

4 0
2 years ago
Alice is going on a picnic and is aware that it will be easier to carry the picnic basket if it balances at the center where the
Maksim231197 [3]

Answer: 13.703cm from the center of the basket on the end holding the 0.675kg package of hot dog.

Explanation:

The center of the basket is at point 26 cm from each end of the basket.

This is gotten from the evaluation;

52cm/2.

The principle of moments is very important in solving this problem,

"The algebraic sum of all clockwise moments must be equal to he algebraic sum of all anticlockwise moments"

The statement above is the principle of moments.

Now to the question,

Since the acceleration due to gravity is assumed to be equal for all of the masses,

By intuition, the basket would tilt downwards on the end which holds the 1.65kg container of potato salad.

Consequently, to balance the basket 1.85kg container of lemonade must be placed at a distance, x from the center of the basket along the length of the basket (on the end holding the 0.675 package of hot dog).

Therefore, Taking moments about the center of the basket,

(1.65kg×26cm)=(0.675kg×26cm)+(1.85cm×xcm)

Therefore from the expression above, x = 13.703cm from the center on the basket on the side which holds the 0.675kg package of hot dog.

PS: The knowledge of moments of forces is very important in understanding machines especially those which are used for measuring weights relative to other weights.

8 0
3 years ago
Read 2 more answers
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