All categories

4 years ago

2 QUESTIONS 20 POINTS

Physics

2 answers:

irina [24]4 years ago

7 0

I think 1 is x-rays and 2 is ultraviolet light.. I'm not that sure

stich3 [128]4 years ago

3 0

Just finished completitng this kind of info in the course that I am taking! X-rays contain the most energy, and microwaves would have the longest wavelength.

Higher frequency= more energy

If you want to add it to your notes, this is EMR listed in order from highest frequency/highest energy, to lowest frequency/ lowest energy.

Gamme rays, X-rays, UV, Visible light, Infrared, Microwave, and radio waves.

So, Gamme rays have the highest energy and frequency, and radio waves havethe lowest.

You might be interested in

In two or more complete sentences, describe the purpose and outcome of the Miller Urey experiment.

Rama09 [41]

Miller Urey experiment's purpose was to test the chemical origin of life under the conditions supposed to be present on the early Earth.
The scientists Miller and Urey heated a mixture of water, ammonia, methane and hydrogen in a sterile flask until it evaporated water to produce water vapour. Electric sparks were passed through the mixture of water vapour and gases, simulating lightning. The experiment was done during one week. After a week, the contents were analysed and Miller and Uray proved that several organic compounds could be formed spontaneously by simulating the conditions of Earth's early atmosphere.

7 0

4 years ago

Practice

marshall27 [118]

Answer:

In both cases the height is greater than 10.3 m

Explanation:

Pressure is defined by the relationship

P = F / A

in this case the force is the weight of the two gases

F = W = m g

If we use the definition of density

ρ = m / V

V = A h

m = ρ A h

we substitute

P = ρ g h

h = $\frac{P}{\rho g}$

For this case the density of the gases is

ρ' = 0.9 $\rho_{water}$

h = $\frac{P}{0.9 \ \rho_{water} g}$

we calculate

ρ’= 0.9 \rho_{water}

h = 1 105 / (0.9 1000 9.8)

h = 11.3 m

ρ’= 0.8 \rho_{water}

h = 1 105 / (0.8 1000 9.8

h = 12.8 m

In both cases the height is greater than 10.3 m

4 0

3 years ago

Two balls are dropped from rest and allowed to fall. If one ball is allowed to fall for 1 s and the other for 3 s compare the di

kirill115 [55]

The second ball traveled a greater distance when compared to the first ball because the second ball spent more time in motion.

The given parameters;

time of fall of the first ball, t = 1 s
time of fall of the second ball, t = 3 s

The distance traveled by each ball is calculated using the second equation of motion as shown below.

The distance traveled by the first ball is calculated as follows;

$h = u_0t + \frac{1}{2} gt^2\\\\h = 0 + \frac{1}{2} gt^2\\\\h = \frac{1}{2} gt^2\\\\h = (0.5\times 9.8\times 1^2)\\\\h = 4.9 \ m$

The distance traveled by the second ball is calculated as follows;

$h = \frac{1}{2} gt^2\\\\h = (0.5\times 9.8\times 3^2)\\\\h = 44.1\ m$

Thus, the second ball traveled a greater distance because it spent more time in motion.

Learn more here:brainly.com/question/5868480

3 0

2 years ago

A single crystal of aluminum is oriented for a tensile test such that its slip plane normal makes angle of 28.1 with the tensil

NISA [10]

Answer:

we have to find out the critical resolved shear stress. As it it given in the question

Ф = 28.1°and the possible values for λ are 62.4°, 72.0° and 81.1°.

a) Slip will occur in the direction where cosФ cosλ are maximum. Cosine for all possible λ values are given as follows.

cos(62.4°) = 0.46

cos(72.0°) = 0.31

cos(81.1°) = 0.15

Thus, the slip direction is at the angle of 62.4° along the tensile axis.

b) now the critical resolved shear stress can be find out by the following equation.

τ $_{crss}$ = σ $_{Y}$ ( cosФ cosλ) $_{max}$

now by putting values,

= (1.95MPa)[ cos(28.1) cos(62.4)] = 0.80 MPa (114 Psi) 7.23

3 0

4 years ago

study a 75kg person stands on a scale in an elevator what does read in n and in kg when the elevator is at rest?

Verdich [7]

To solve this problem we will use Newton's second law in order to obtain the weight of a person. The second law tells us that

F = ma

Where,

m = mass

a = Acceleration

In this particular case, the acceleration is equal to that exerted by the earth through gravitational acceleration, so if the person's weight is 75Kg and the gravity is $9.8m / s^2$ , the weight of the body will be,

$F_W =mg$

$F_W = (75kg)(9.8m/s^2 )$

$F_W = 735.75N$

When the elevator is at rest this reads 735.75N and 75Kg (The same mass of the person)

6 0

3 years ago