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3 years ago

• A flame always points upwards. Why do you think this is so?

Physics

1 answer:

valina [46]3 years ago

3 0

Answer:

A flame always point upwards because the flame's gas is hotter than the surrounding air and, like you said, a hot gas is always lighter or less dense than a cold gas.

Explanation:

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Determine the direction of the force (if any) that will act on the charge in each of the following situations. A positive charge

NeTakaya

Answer:

a) F on the right , b) F up , c) Force to the left , d) Force down , e) Force towards the screen , f) Force is zero

Explanation:

The equations for the forces are

Electric

F = q E

Magnetic

F = q v x B

The Bold are vectors, the charges are positive

Let's apply these equation to the proposed situations

a) as the load is positive the force goes in the direction of the field

F on the right

b) as the load is negative the force goes in the opposite direction to the field

F is up

c) positive charge with speed down and magnetic field out of the screen.

For this part we will use the right hand rule. The thumb is in the direction of the speed, the fingers extended in the direction of the magnetic field and the palm is in the direction of the force for a positive charge

Force to the left

d) negative charge, speed to the right magnetic field between the screen

The force has direction

Force down

e) positive charge, electric field towards the screen.

Force in the direction of the field

Force towards the screen

.f) negative charge, speed to the right, magnetic field to the right

The vector product is zero,

Force is zero

3 0

3 years ago

Which of these waves probably has the largest wavelength?

elena-14-01-66 [18.8K]

Answer:

I think it's the last one

Explanation:

good luck

5 0

3 years ago

Read 2 more answers

The diameter of a copper wire is thought to be approximately 0.3mm. Which instrument should be used to obtain a more accurate me

erica [24]

Answer:

Explanation:

The correct answer should be the micrometer.

<u>The micrometer is an instrument that is capable of measuring the component of an object to very high precision. It is used to obtain accurate measurements in engineering.</u>

<em>In the case of the copper wire, the diameter of 0.3 mm was an approximation and a more accurate measure of the diameter would be obtained by using the micrometer.</em>

The correct option is C.

4 0

3 years ago

A 310-g air track cart is traveling at 1.25 m/s and a 260-g cart traveling in the opposite direction at 1.33 m/s. What is the sp

UNO [17]

Answer:

$v_{CM}=0.0732\ m/s$