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3 years ago

One property that makes electromagnetic waves differ from other types of waves is that they can

Physics

2 answers:

seropon [69]3 years ago

7 0

Answer:

One property that makes electromagnetic waves differ from other types of waves is that they can travel in a vacuum.

iren2701 [21]3 years ago

5 0

Electromagentic waves can travel through space. they don't require any medium.

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This question is typical on some driver’s license exams: A car moving at 45 km/h skids 15 m with locked brakes. How far will the

sergiy2304 [10]

from kinematics equation if we know that final speed is ZERO and initial speed is given that due to constant deceleration the object will stop in some distance "d" and this distance can be calculated by kinematics

$v_f^2 - v_i^2 = 2 a d$

$0 - v^2 = 2(a)d$

here acceleration due to friction will be same at all different speed

so for 45 km/h speed the distance of stop is 15 m

while at other speed 112.5 km/h the distance will be unknown

now we will have

$0 - 45^2 = 2(a)15$

$0 - 112.5^2 = 2(a)d$

now divide above two equations

$\frac{45^2}{112.5^2} = \frac{15}{d}$

$d = 93.75 m$

So it will stop in distance 93.75 m

8 0

3 years ago

What is the critical angle of light traveling from benzene (n=1.501) into air?

Taya2010 [7]

The critical angle formula should be: sin^-1(1/n)

where "n" is 1.501 into the air

<span>The critical angle of light travelling from benzene, happens because the larger angles of incidence from the inside of the benzene has experienced the total internal reflection. </span>

4 0

4 years ago

When cooking frozen cheese ravioli, the directions say to put the 255 grams of filled pasta into 3 quarts of boiling water. Why

nadya68 [22]

Answer:

a. $T_f=95.14^{\circ}C$

b. $T_f=86.4^{\circ}C$

It is asked for 3 quarts of water because it prevents the temperature drop.

Explanation:

Given:

mass of frozen cheese, $m_c=255\ g$

quantity of water suggested for the given cheese, $m_w=3\ quarts\times 946.35=2839.05\ g$

initial temperature of cheese, $T_{ic}=-40^{\circ}\ C$

specific heat of cheese, $c_c=0.4\ cal.g^{-1}.^{\circ}C^{-1}$

initial temperature of water, $T_{iw}=100^{\circ}\ C$

we have specific heat of water, $c_w=1\ cal.g^{-1}.^{\circ}C^{-1}$

so now, we use the heat equation to find the amount of heat exchange during the process:

$m_c\times c_c\times \Delta T=m_w\times c_w\times \Delta T$

$255\times 0.4\times (T_f-(-40))=2839.05\times 1\times (100-T_f)$

$T_f=95.14^{\circ}C$

when using 1 quart of water:

$255\times 0.4\times (T_f-(-40))=946.35\times 1\times (100-T_f)$

$T_f=86.4^{\circ}C$

It is asked for 3 quarts of water because it prevents the temperature drop.

3 0

3 years ago

What is one way that an electric field is different from a magnetic field?

liubo4ka [24]

Answer with Explanation:

Electric field:It is the force per unit charge experienced by rest charge at any given point.

It is the area around the charge which is placed at rest.It is represented by E.

Mathematical formula:

$E=\frac{F}{q}$

Magnetic field:It is an area around moving charge in which moving charge particle experienced magnetic force in that area.

Magnetic field is represented by B.

Mathematical formula :

$F=qvBsin\theta$

Where B=Magnetic field

q=Charge on particle

v=Velocity of particle

F=Magnetic force exert on particle

3 0

3 years ago

When you approach a light source that in turn is moving towards you, your speed relative to the emitted light waves _____.?

Natalka [10]

This is a trick question:

The Doppler effect states that as you move closer to the source, the frequency of light(or sound/waves in general) increases, but technically the speed of light is always the same speed, even if you are moving at the speed of light.

Thus, the answer would be something along the lines of <u>don't change</u>.

7 0

3 years ago

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