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2 years ago

If you wanted to detect x-rays coming from the sun, where would you place the detector? And why?

1 answer:

7 0

The Sun does emit xrays. You'd have to place your sensor above the Earth's atmosphere because it blocks out nearly all x-rays. This is why we have the Chandra observatory ( http://chandra.harvard.edu/xray_astro/absorption.html )

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consider two charges. one has a charge of +15.mC and the other a charge of -3.00mC. if the electrostatic force between these cha

Dima020 [189]

Answer:164.3metre

Explanation:

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2 years ago

Describe how a change in resistance would affect the current in a circuit.

Tresset [83]

Explanation:

The relation between potential difference, current and resistance flowing in a circuit is given by using Ohm's law. It can be given by :

V = IR

$I=\dfrac{V}{R}$

Resistance opposes the flow of electric current in the circuit. It means that, if resistance is more, less current will flow through the circuit.

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2 years ago

With good tires and breaks, a car traveling 50 mi/hr on dry pavement can travel 400 ft when the driver reacts to something he se

Bogdan [553]

Answer: $6.72 m/s^2$

Explanation:

Given

initial velocity $u=50 mi/hr\approx 73.33 ft/s$

Distance traveled before stopping $s=400 ft$

using equation of

$v^2-u^2=2as$

where v=final velocity

u=initial Velocity

a=acceleration

s=displacement

v=0 as car stops after travelling $400 ft$

$0-73.33^2=2\times a\times 400$

$a=-6.72 m/s^2$

negative sign indicates it is deceleration

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2 years ago

Describe the differences and similarities between an electromotor and a generator.

Effectus [21]

Differences:

An electrical motor converts electrical energy into mechanical energy,where as a generator converts mechanical energy into electrical energy.

The principle of a electric motor if there is a change of the magnetic field across a conductor electrons are forced to move in a direction perpendicular to the direction of the magnetic field,where as in a generator if a charge is moving in a magnetic field, a force acts on the charge in a direction perpendicular to both the velocity of the charge and the magnetic field.

similarities:

Both electric motor and generator work on the magnetic effects of electric current.

Both have the armatures to rotate the loop.

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2 years ago

Who might be experiencing psychosis?

aleksandrvk [35]

Answer:

Explanation:

I think the answer is D, because of hallucinations

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2 years ago