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2 years ago

What speed do all electromagnet waves travel

Physics

1 answer:

Grace [21]2 years ago

3 0

3x10^8 m/s, or the ‘speed of light’ - this applies to the entire spectrum

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Two spherical objects at the same altitude move with identical velocities and experience the same drag force at a time t. If Obj

Anna35 [415]

Answer:

The object with the twice the area of the other object, will have the larger drag coefficient.

Explanation:

The equation for drag force is given as

$F_{D} = \frac{1}{2}pu^{2} C_{D} A$

where $F_{D}$ IS the drag force on the object

p = density of the fluid through which the object moves

u = relative velocity of the object through the fluid

p = density of the fluid

$C_{D}$ = coefficient of drag

A = area of the object

Note that $C_{D}$ is a dimensionless coefficient related to the object's geometry and taking into account both skin friction and form drag. The most interesting things is that it is dependent on the linear dimension, which means that it will vary directly with the change in diameter of the fluid

The above equation can also be broken down as

$F_{D}$ ∝ $P_{D}$ A

where $P_{D}$ is the pressure exerted by the fluid on the area A

Also note that $P_{D}$ = $\frac{1}{2}pu^{2}$

which also clarifies that the drag force is approximately proportional to the abject's area.

In this case, the object with the twice the area of the other object, will have the larger drag coefficient.

5 0

3 years ago

What does it mean for a substance to have a high reactivity?

BaLLatris [955]

Reactivity is the tendency of a substance to undergo chemical reaction, either by itself or with other materials, and to release energy.

7 0

4 years ago

PLEASE HELP!!! Both Transverse and Longitudinal Waves transmit _______ and not ______.

qwelly [4]

I believe this is it

6 0

3 years ago

Two workers are sliding 350 kgkg crate across the floor. One worker pushes forward on the crate with a force of 390 NN while the

svetoff [14.1K]

Answer:

$\mu_k=0.18$

Explanation:

First, we write the equations of motion for each axis. Since the crate is sliding with constant speed, its acceleration is zero. Then, we have:

$x: T+F-f_k=0\\\\y:N-mg=0$

Where T is the tension in the rope, F is the force exerted by the first worker, f_k is the frictional force, N is the normal force and mg is the weight of the crate.

Since $f_k=\mu_k N$ and $N=mg$ , we can rewrite the first equation as:

$T+F-\mu_k mg=0$

Now, we solve for $\mu_k$ and calculate it:

$\mu_k=\frac{T+F}{mg}\\ \\\mu_k =\frac{220N+390N}{(350kg)(9.8m/s^{2})} =0.18$

This means that the crate's coefficient of kinetic friction on the floor is 0.18.

6 0

4 years ago

Is bath oil a homologenous mixture?

DaniilM [7]

Examples:
Air 
Blood 
Mouthwash 
Rubbing Alcohol 
Peroxide 
Hand-sanitizer 
Perfume 
Some bath gels 
Coffee 
Chicken or Beef Broth 
Body Spray 
Natural Oils 

A heterogeneous mixture is a mixture where the components of the mixture are not uniform or have localized regions with different properties. 

Examples: 
Rocks 
Oil and water 
Soup 
Pizza 
Copper sulfate 
Salsa 
Chicken soup 
Cottage cheese

hope that helped

5 0

3 years ago

What speed do all electromagnet waves travel​

What speed do all electromagnet waves travel