All categories

3 years ago

Hello Please Help With A couple Science questions

Physics

2 answers:

matrenka [14]3 years ago

5 0

#1 A) Long wavelength and high frequency.

#2) A) Brightness.

#3) D) They are used to examine things.

#4) B) Compression and visible light waves.

Sav [38]3 years ago

4 0

For the first one is A.
Second one is A.
Third one is D.
Forth one is B.

 Hope this helps:)

You might be interested in

A current of 2.0A flows through a light bulb. What is the amount of charge flowing through the light bulb in 40 seconds?

lidiya [134]

Answer:

Quantity of charge = 80 Coulombs

Explanation:

Given the following data;

Current = 2 A

Time = 40 seconds

To find the amount of charge flowing through the light bulb;

Mathematically, the quantity of charge passing through a conductor is given by the formula;

Quantity of charge = current * time

Substituting into the formula, we have;

Quantity of charge = 2 * 40

Quantity of charge = 80 Coulombs

5 0

3 years ago

In which situation is the acceleration of the car negative?

VikaD [51]

When a car is slowing down, it has a negative acceleration. Although it is not going a negative speed, it is decreasing in velocity, which is the definition of a negative acceleration.

Hope this helps!

4 0

3 years ago

Read 2 more answers

Assuming motion is on a straight path what would result in two positive components of a vector

polet [3.4K]

If the object being represented is going both up and to the right.

5 0

4 years ago

An athlete runs 600 m in 2 minutes and the next 1000 m in 1 minute on the same straight

krek1111 [17]

Answer:

Explanation:

Average speed is found by adding together the total distances traveled by the athlete and divide that total by the total time it took.

Average velocity is vector, which means it includes direction. If the athlete heads one way and then turns around, his displacement might actually be negative! Yikes! Let's look at speed first:

$s=\frac{600+1000}{2+1}=\frac{1600}{3}=533\frac{1}{3}\frac{m}{min}$

Velocity is the displacements added together divided by the total amount of time it took. The displacement is the same as the distance here, since the athlete did not veer off his straight-path and didn't turn around.

Average velocity = average speed = 533.3 m/min

3 0

3 years ago

At one instant, force → F = 4.0 ˆ j N acts on a 0.25 kg object that has position vector → r = ( 2.0 ˆ i − 2.0 ˆ k ) m and veloci

eduard

Answer with Explanation:

We are given that

$Force,F=4.0 jN$