Which jobs use electromagnets?

Answers

Answer 1

Answer: Auto mechanics use them for both electric and hybrid cars, MRI technicians use them to look inside a patient's body when giving them an MRI scan, and robotic engineers use them also where the electromagnets power the motor and cause the robot to move.

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Suppose a rocket ship in deep space moves with constant acceleration equal to 9.8 m/s2, which gives the illusion of normal gravity during the flight. (a) If it starts from rest, how long will it take to acquire a speed one-tenth that of light, which travels at 3.0 × 108 m/s? (b) How far will it travel in so doing?
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Which circuits are parallel circuits?

Answers

two or more electrical devices in a circuit can be connected by series connections or by parallel connections. When all the devices are connected using parallel connections, the circuit is referred to as a parallel circuit.

They're the circuits in which each end of one component is connected to one end of the other component.

If you have a picture of some circuits to pick the parallel ones from, it's a mystery to me why you haven't posted the picture too.

What is the momentum of a 12,000 kg car moving at a speed of 40 m/s?

Answers

Momentum = (mass) x (speed)

Momentum = (12,000 kg) x (40 m/s)

Momentum = (12,000 x 40) kg-m/s

Momentum = 480,000 kg-m/s

4 newtons, 4 amps, 4 joules, 4 watts, 4 ohms, 4 volts
what does I=

Answers

Answer:

I $= 4$ amperes

Explanation:

Newton is the unit of force. Hence 4 newton is not the current “I”

Joules is the unit of energy and hence it do not signify current I

Watt is the unit of power i.e the rate of transfer of energy.

Ohm is the unit of resistance produces thereby obstructing the flow of current

And Volts is the unit of voltage or potential difference between two ends of an electric circuit. Thus, it is also does not signifies current.

Thus, I $= 4$ amperes

Examine the reactants of the incomplete double displacement reaction.AgNO3 + NaCl → _[blank].
What are the products of the double displacement reaction?
AgCINaNO3
Ag + Cl + Na + NO3
AgCINa + NO3
AgCl + NaNO3

Answers

Answer:

AgCl + NaNO₃

Explanation:

The reaction between silver nitrate and sodium chloride is an example of a double displacement reaction.
In a double displacement reaction compounds or salts reacts and exchange cations or anions to form new compounds or salts.
In this case, silver nitrate and sodium chloride exchange anions and cations to form silver chloride and sodium nitrate.

Therefore, the complete reaction is given by;

AgNO3 + NaCl → AgCl + NaNO₃

But since silver chloride is a precipitate, the reaction may also be an example of a precipitation reaction.

How do the properties in the elements in the same column of the periodic table compare?

Answers

Same oxidation number.

The columns of the periodic table, also referred to as "groups" contain elements with similar reactive properties, due to these elements having a similar configuration of electrons in their outer shell.

What is the final temperature when a 3.0 kg gold bar at 99 0C is dropped into 0.22 kg of water at 25oC?

Answers

Answer:

46.9 C

Explanation:

The heat released by the gold bar is equal to the heat absorbed by the water:

$m_g C_g (T_g-T_f)=m_w C_w (T_f-T_w)$

where:

$m_g = 3.0 kg$ is the mass of the gold bar

$C_g=129 J/kg C$ is the specific heat of gold

$T_g=99 C$ is the initial temperature of the gold bar

$m_w = 0.22 kg$ is the mass of the water

$C_w=4186 J/kg C$ is the specific heat of water

$T_w=25 C$ is the initial temperature of the water

$T_f$ is the final temperature of both gold and water at equilibrium

We can re-arrange the formula and solve for T_f, so we find:

$m_g C_g T_g -m_g C_g T_f = m_w C_w T_f - m_w C_w T_w\nm_g C_g T_g +m_w C_w T_w= m_w C_w T_f +m_g C_g T_f \nT_f=(m_g C_g T_g +m_w C_w T_w)/(m_w C_w + m_g C_g)=\n=((3.0)(129)(99)+(0.22)(4186)(25))/((0.22)(4186)+(3.0)(129))=(38313+23023)/(921+387)=(61336)/(1308)=46.9 C$