Answer:
The spring constant is 60,000 N
The total work done on it during the compression is 3 J
Explanation:
Given;
weight of the girl, W = 600 N
compression of the spring, x = 1 cm = 0.01 m
To determine the spring constant, we apply hook's law;
F = kx
where;
F is applied force or weight on the spring
k is the spring constant
x is the compression of the spring
k = F / x
k = 600 / 0.01
k = 60,000 N
The total work done on the spring = elastic potential energy of the spring, U;
U = ¹/₂kx²
U = ¹/₂(60000)(0.01)²
U = 3 J
Thus, the total work done on it during the compression is 3 J
Answer:
The ratio of the model size is 1 : 2000
Explanation:
Given
Real Diameter = 0.012 um
Scale Diameter = 24 um
Required
Determine the scale ratio
The scale ratio is calculated as follows;
Substitute values for real and scale measurements
Divide the numerator and the denominator by 0012um
Represent as ratio
Hence, the ratio of the model size is 1 : 2000
The ratio of the model size to the actual size is 1 : 2000. This means the model represents the white blood cell's diameter 2000 times larger than its actual size.
The ratio of the model size to the actual size can be calculated using the given measurements:
Actual Diameter = 0.012 um
Model Diameter = 24 um
Ratio = Model Diameter / Actual Diameter
Ratio = 24 um / 0.012 um
Ratio = 2000
So, the ratio of the model size to the actual size is 1 : 2000. This means the model represents the white blood cell's diameter 2000 times larger than its actual size.
Learn more about white blood from the link given below.
#SPJ3
Answer: Length axis f= 114.3 Hz, Width axis f=228.67 Hz
Explanation:
We are given that,
Length of tub= 1.5 m
Width of tub= 0.75 m
Sound speed= 343 m/s
Now, we are also given shower is closed.
So, frequency is given as:
f=
For length axis
Put v= 343 m/s, m=1 and L=1.5 m
f= 1 *
f= 114.3 Hz
For next resonant frequency, m=2
f= 2*
f= 228.67
For width axis
Put v= 343 m/s, m=1 and L= 0.75 m
f= 1*
f= 228.67 Hz
For next frequency, m=2
f= 2*
f= 457.34 Hz
2. The earth is heated and its atmosphere is cooled by terrestrial radiation.
3. The earth is cooled and its atmosphere is heated by terrestrial radiation.
4. The earth is heated and its atmosphere is cooled by solar radiation.
Don't answer unless you know for sure. Thank you so much!
Answer: The option 4 is correct answer.
Explanation:
Terrestrial radiation is a long wave electromagnetic radiation. It originates from the earth and its atmosphere.
The sun emits a huge amount of energy. It travels across the space. The atmosphere is not directly heated by the solar radiation. It is heated by the terrestrial radiation that the planet itself emits.
When the land is heated then it emits radiation which heats up the atmosphere.
The earth is cooled and its atmosphere is heated by terrestrial radiation.
Therefore, the relationship between the earth, its atmosphere and radiation is correctly compared by statement 4.
Answer:
(A). The time is 5.47 sec.
(B). The speed of the rock just before it strikes the ground is 39.59 m/s.
Explanation:
Given that,
Initial velocity = 14.0 m/s
Height = 70.0 m
(A). We need to calculate the time
Using second equation of motion
Put the value into the formula
(B). We need to calculate the speed of the rock just before it strikes the ground
Using third equation of motion
Put the value into the formula
Hence, (A). The time is 5.47 sec.
(B). The speed of the rock just before it strikes the ground is 39.59 m/s.
Answer:
e. f2 < f < f1
Explanation:
According to Doppler's Effect:
......................................(1)
where:
are observed frequency and source frequency respectively.
S = velocity of sound in the air from a stationary source
are the velocity of the observer and the velocity of sound source with respect to a stationary frame of reference.
Here
Then eq. (1) becomes:
Now, the value:
Now the eq. (1) becomes
∵the direction of motion of the source is away from the observer so a negative sign has been introduced.
Now, the value:
The energy stored in the body in a rest state is called potential energy.
There are two types of mechanical energy. The mechanical energy is consist of the following:-
According to the question, the solution is:-
The formula we used is
After putting the value the equation is stated as follows:-
Hence the is equal to:-
m
The spring compressed in 0.81m
For more information, refer to the link:-
Answer:
x = 0.81 m
Explanation:
given,
spring constant, k = 769 N/m
Potential energy of the spring = 250 J
distance of spring compression = ?
using conservation of energy
potential energy will equal to the spring energy
x² = 0.650
x = 0.81 m
Hence, the spring is compressed to 0.81 m