Significant think why scientists presently accept is the key factor in moving information from short term memory is to deliver more the data which is rehashed or utilized, the more probable it is to end up in long-term memory.
<u>Explanation:</u>
Short-term memory (STM) envelops psychological capacities for the capacity, support, and mental control of data that is never again present in the tactile condition. So the Magic number 7 (give or take two) gives proof to the limit of transient memory.
Most grown-ups can store somewhere in the range of 5 and 9 things in their transient memory. It enables the apparent thing important to be changed over into a development that can be put away inside the brain, and afterward reviewed later from the present moment or long-term memory.
Answer:
1.53 cm
Explanation:
The relationship between wavelength and frequency for a wave is:
where
v is the speed of the wave
f is the frequency
is the wavelength
In this problem, we have:
is the frequency of the ultrasound wave
is the speed of sound in sea water at room temperature
Re-arranging the previous equation and solving for , we find the wavelength of the ultrasound wave:
Answer:
f = -60 cm, this means tha the focal point is on the same side as the side where the object is located.
Explanation:
let u be the distance from the lens to the object and u = -35 cm, v be the distance from the lens to the image and m is the magnification and m = -v/u and f is the focal point.
Answer:
- Question 1: You cannot make sure the ballon will not burst before it reaches 3,000m altitude because the volume will exceed 47.0 liters
Explanation:
<u>1. Data</u>
- Maximum volume of the balloon: 47.0 liters
At 3,000 m:
- Temperature at 3,000 m, T₁: 6.0ºC
- Pressure at 3,000m, P₁: 0.565atm
At ground:
- Temperature at ground, T₂: 20ºC
- Pressure at ground, P₂: 765mmHg
- Volume at ground, V₂: 30.0 liters
Questions:
- Will the balloon's volume be more than 47.0 liter?
- Amount in grams of helium in the ballon:?
<u>2. Unit conversions:</u>
a) Convert P₂ to atm:
- P₂ = 765mmHg × 1 atm/760.0mmHg = 1.00657895atm
b) Convert the temperatures to kelvin:
- T₁ = 6.0 + 273.15 = 279.15K
- T₂ = 20 + 273.15 = 293.15K
<u>3. Solution</u>
Question 1.
<u>Calculate the final volume of the balloon:</u>
Since the number of moles of helium gas inside the balloon remains unchanged, pV = nRT yields the combined gas law:
From which you can solve for V₁ and compute it:
Then, the volume of the balloon will exceed the gurantee of the manufacturer.
Question 2.
<u>a) Calculate the number of moles of helium</u>
<u>b) Calculate the mass in grams of helium</u>
<u />
Use the atomic mass of helium: 4.003g/mol
- mass = number of moles × molar mass
- mass = 1.2558mol × 4.003g/mol = 5.02g
Rounding to 2 significant figures: 5.0g
Answer:
60 mph
Explanation:
Average speed is distance divided by time.
v = d / t
v = 60 mi / 1 hr
v = 60 mph