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2 years ago

Unlike mechanical waves, electromagnetic waves do not require to travel through.

2 answers:

6 0

The electromagnetic waves do not need any medium to travel as they are not mechanical in nature. They propagate in the form of electric and magnetic energy having a perpendicular vector of its velocity wave

Aleksandr-060686 [28]2 years ago

5 0

Unlike mechanical waves, electromagnetic waves do not require to medium through, Electromagnetic waves are the medium thru and which all exists as in Dr Wolff's Wave of Structure of matter.

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In order for a length of copper wire or a loop of copper wire to have a magnetic field, what must they have flowing through them

Nataliya [291]

Electricity.
When electricity flows through wire (such as a battery circuit) it creates a magnetic field around the wire.

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2 years ago

Ele is playing with a ball in a bus that moves in a straight line with constant velocity What can you say about the motion of th

cupoosta [38]

Answer:

The ball will fall back and land to Elle's hands.

Explanation:

The bus move in a straight line with constant velocity means that there is no change of direction and no acceleration. Inertia can change the direction of the ball and acceleration can change its velocity. Since these two factors is not present in this scenario, the ball only has vertical movement. Thus the ball will land where it was thrown, in Elle's hands.

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2 years ago

Which will result in positive buoyancy and cause the object to float?

Wewaii [24]

the answer should be:

When the buoyant force is equal to the force of gravity

4 0

2 years ago

Read 2 more answers

A little girl is swinging on her tire swing. At the lowest point of her swing, the tension in the rope is a) Equal to the gravit

Elodia [21]

A because the girl in that instant is not moving up or down so
( up forces)=(down forces )
The up forces is the tension of the rope and down forces us mg -the gravitational force on the girl by the earth

6 0

2 years ago

A car is driving away from a crosswalk. The formula d = t 2 + 2 t expresses the car's distance from the crosswalk in feet, d , i

Ede4ka [16]

Answer:

1) No, the car does not travel at constant speed.

2) V = 9 ft/s

3) No, the car does not travel at constant speed.

4) V = 5.9 ft/s

Explanation:

In order to know if the car is traveling at constant speed we need to derive the given formula. That way we get speed as a function of time:

V(t) = 2*t + 2 Since the speed depends on time, the speed is not constant at any time.

For the average speed we evaluate the formula for t=2 and t=5:

d(2) = 8 ft and d(5) = 35 ft

$V_{2-5}=\frac{d(5)-d(2)}{5-2}=9 ft/s$

Again, for the average speed we evaluate the formula for t=1.8 and t=2.1:

d(1.8) = 6.84 ft and d(2.1) = 8.61 ft

$V_{1.8-2.1}=\frac{d(2.1)-d(1.8)}{2.1-1.8}=5.9 ft/s$

4 0

2 years ago