Answer:
B
Explanation:
Law of Inertia states, a body stays in rest or motion unless an ouside force causes change.
If the mirror moves at 1.5m/s towards Peter while Peter remains at rest, what will he observe? Explain your reasoning
Answer:
Peters image will grow bigger
Explanation:
In this situation, only Peter is at rest and the mirror is in motion at 1.5m/s heading towards Peter.
From afar, Peter will look small in the mirror that is his image will be small When the mirror is moved at 1.5m/s Peter being the observer will notice that his image grows bigger and bigger.
what is meaning of saniya?
Answer:
“brilliant, radiant, splendid”.
Explanation:
Which formula can be used to find the X component of the resultant vector?
Answer:
If you are simply looking for the X component then the most applicable formula from the choices given is Tx + Ux+ Vx. This means that you will add all x-components. For example: If a man walking along the x-axis walks 10 meters to the right, 5 back and 2 meters forward, what is the resultant vector?
describe the movement of a transverse wave please i will give brainliest and the max points
Answer: Movement in which all positions of both the waves rotate around the directions at right angles to the axis of the wave's movement.
Explanation: Hope this help
Choose the polar molecule.
A. C
B. CH4
C. H20
D. F2
Answer : H20
Explanation:
how does the eye control the amount of light entering it?
Answer: Hello there
Explanation:
The colored part of the eye which helps regulate the amount of light entering the eye. When there is bright light, the iris closes the pupil to let in less light. And when there is low light, the iris opens up the pupil to let in more light. Focuses light rays onto the retina.
If we rub a rubber rod against a piece of fur the rod gains a negative change. Why does the rod have a negative charge?
Answer:
because the rod takes electrons from the fur when rubbed across it
Which stars are the youngest?
A) Supergiant
B) White dwarf
C) Blue star
D) Red Dwarfs
Look at the pic please
Answer:
your answer is B) i hope this helps you and have a good day.A woman does 236 J of work
dragging her trash can 24.4 m to
the curb, using a force of 18.9 N.
At what angle was her force
directed?
(Unit = degrees)
Answer:
The woman's force was directed 59.22⁰ to the horizontal.
Explanation:
Given;
work done by the woman, W = 236 J
distance through the load was moved, d = 24.4 m
applied force, F = 18.9 N
inclination of the force, = θ
The work done by the woman is calculated as;
W = Fdcosθ
[tex]cos \ \theta = \frac{W}{Fd} \\\\cos \ \theta = \frac{236 }{18.9 \times 24.4} \\\\cos \ \theta = 0.5118\\\\\theta = cos^{-1} ( 0.5118)\\\\\theta =59.22^0[/tex]
Therefore, the woman's force was directed 59.22⁰ to the horizontal.
Answer:
59.22⁰
Explanation:
A vat of ethyl alcohol expands
by 0.00823 m^3 when the
temperature is raised by 44.8°C.
What was the original volume of
the alcohol?
Ethyl Alcohol B = 1120 10-C-1
(Unit = m^3)
Answer: .164
Explanation:
1120x10^6 is the coefficient for ethyl alcohol b
(.00823)/(1120x10^-6)(44.8) which gives you your answer: 0.164 m^3
A vat of ethyl alcohol expands by 0.00823 m^3 when the temperature is raised by 44.8°C. The original volume of the alcohol is 0.164m³.
What is volume ?A measurement of three-dimensional space is volume. It is frequently expressed quantitatively using SI-derived units, as well as several imperial or US-standard units. Volume and the notion of length are connected.
The capacity of an object is measured by its volume. For instance, a cup's capacity is stated to be 100 ml if it can hold 100 ml of water in its brim. The quantity of space occupied by a three-dimensional object can also be used to describe volume.
A three-dimensional object's volume is the area it takes up, and it is expressed in cubic units. Cm3 and in3 are two examples of cubic units. The amount of matter in an item can be determined by its mass, on the other hand.
1120 x 10⁶ is the coefficient for ethyl alcohol b
= (.00823 ) / ( 1120 x 10⁻⁶) ( 44.8 )
= 0.164 m³
Thus, The original volume of the alcohol is 0.164m³.
To learn more about the volume, follow the link;
https://brainly.com/question/13338592
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HELP PLS !!!!!!!!!!!!!
Explanation:
Weight on Earth = 784N.
Mass of Person = 784N / (9.81N/kg) = 79.9kg.
Weight on Moon = (79.9kg)(1.60N/kg) = 128N. (3s.f.)
A child approaches a stop sign and applies the brakes to slow to a stop. If the bicycle and child were originally traveling at 9.00 m/s and the breaks cause a deceleration of magnitude 1.20 m/s^2, how long will it take the child to stop?
Answer:
7.5secs
Explanation:
Using the equation of motion
v = u + at
v is the final velocity = 0m/s
u is the initial velocity = 9m/s
a is the deceleration = -1.2m/s²
t is the required time
Substitute;
0 = 9 + 1.2(t)
-9 = -1.2t
t = -9/-1.2
t = 7.5secs
hence it takes the child 7.5secs to stop
10) If you shine blue and red light on a white object it appears to be violet. * 1 point
True
Or
False
Answer:true
Explanation:
During a spring tide, the high tides are very high and the low tides are very low. Why does this occur?
Image result for During a spring tide, the high tides are very high and the low tides are very low. Why does this occur?
In both cases, the gravitational pull of the sun is 'added' to the gravitational pull of the moon on Earth, causing the oceans to bulge a bit more than usual. This means that high tides are higher and low tides are lower than average. These are called 'spring tides. '
brainliest please?
Answer:
In both cases, the gravitational pull of the sun is 'added' to the gravitational pull of the moon on Earth, causing the oceans to bulge a bit more than usual. This means that high tides are higher and low tides are lower than average. These are called 'spring tides. '
What happens as the frequency of a wave increases?
Answer:
The number of complete wavelengths in a given unit of time is called frequency (f). As a wavelength increases in size, its frequency and energy (E) decrease. From these equations you may realize that as the frequency increases, the wavelength gets shorter. As the frequency decreases, the wavelength gets longer.
Explanation:
please mark me as brainliest thank you
The number of complete wavelengths in a given time is called frequency (f). As a wavelength increases in size, its frequency and energy (E) decrease.
what is frequency ?The frequency referred to the number of oscillation per unit time and it is used for defining the cyclic process like rotation, oscillation, wave etc.
The SI unit is denoted as Hertz and the symbol λ represents it where one hertz means the wave completed one cycle in one second.
The frequency explains the phenomenon of oscillatory and vibration like the mechanical vibration, sound signals, light, frequency waves etc. The “period” represented as the time required by the wave for one oscillation, i.e., it is inversely proportional to the frequency.
For more details regarding frequency, visit
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What is specific heat capacity
Answer:
Heat capacity or thermal capacity is a physical property of matter, defined as the amount of heat to be supplied to a given mass of a material to produce a unit change in its temperature. The SI unit of heat capacity is joule per kelvin. Heat capacity is an extensive property
A pirate’s map has you traveling 8 m N and 10 m W. It takes you 22 seconds to complete the distance. What is your speed?
Which of the following best describes how nuclear decay rates can be altered?
A. Extreme temperature can alter nuclear decay rates.
B. Environmental conditions do not change the rate of decay for an isotope. Half-life is consistent over time.
C. High pressure can alter nuclear decay rates.
D. A large surface area can alter nuclear decay rates.
Most of the lactic acid produced by anaerobic respiration in muscle fibers is reconverted to glucose in the?
Answer
liver
Explanation:
Once sufficient oxygen is restored, the lactic acid produced via anaerobic glycolysis can be utilized for energy or reconverted into glucose by the liver and other tissues (a process known as oxidation).
Two objects are dropped in vacuum chamber from the same height: a marble and a bowling ball. Which of the following are true? (Mark two answers)
The bowling ball will accelerate faster
After 1 second both objects will have the same acceleration
In a vacuum objects can't move
Both objects will reach the ground at the same speed
The marble will remain in the air longer
Answer:
After one second both objects will have the same acceleration
Both objects will reach the ground at the same speed
Explanation:
Because a vaccum chamber is a free fall place
Convert 1 second into solar day.
DIVIDE 1 BY 86400 TO CONVERT 1 SECOND INTO SOLAR DAY.
6. A rock is dropped from a bridge. As it falls, its acceleration is 10. What is its speed when it hits the water after falling for 8.17 s?
*Round your answer to the nearest hundredth if necessary.
mn
Answer:
800
Explanation:
bc if you times by ten
49. A 6.1-kg bowling ball is liſted 2.1 m to a shell. Find
the increase in the ball-Farth system's energy.
Answer:
125.5J
Explanation:
Given parameters:
Mass of the bowling ball = 6.1kg
Height of lifting = 2.1m
Unknown:
Increase in the ball energy = ?
Solution:
The ball has changed position by moving it from one point to another. So, it has acquired more potential energy.
Potential energy = mgh
m is the mass
g is the gravity
h is the height
Now insert the given parameters and solve;
Potential energy = 6.1 x 9.8 x 2.1 = 125.5J
- What is an earthquake?
Answer:
A earthquake is the shaking of the surface of the Earth resulting from a sudden release of energy in the Earth's lithosphere that creates seismic waves
I have the answer I just need it worked out, thank you.
A dry cleaner throws a 22 kg bag of laundry onto a stationary 9 kg cart. The cart and bag begin moving at 3 m/s to the right. Find the velocity of the bag before the collision. (4.2 m/s)
Answer:
Vbag = 4.22 [m/s]
Explanation:
In order to solve this problem we must use the principle of conservation of momentum. Which tells us that the momentum of a system is preserved before and after a collision.
Let's take both movements (bag and cart) as positive, since they both move in the same direction. Now everything that happens before the collision will be taken to the left of the equation and after the collision to the right of the equal sign.
[tex](m_{bag}*v_{bag})=(m_{bag}+m_{cart})*v_{final}[/tex]
where:
mbag = mass of the bag = 22 [kg]
vbag = velocity of the bag [m/s]
mcart = mass of the cart = 9 [kg]
vfinal = mass of both bodies moving together = 3 [m/s]
Now replacing:
[tex](22*v_{bag})=(22+9)*3\\22*v_{bag}=93\\v_{bag}=4.22[m/s][/tex]
A bat emits a pulse of sound of wavelength 0.0085 m. Calculate the frequency of the sound.
Answer:
v = 4.0 10⁴ Hz
Explanation:
The bat emits sound in the air, so we can use the speed of sound in air
v = 344 m / s
also the expression that relates the wavelength and frequency with the speed of the wave
v = λ f
f = v / λ
let's calculate
v = 344/0.0085
v = 4.0 10⁴ Hz
HI thts way tooo much to answer but ye...d;
Having Good Posture
A. puts unnecessary strain on joints& ligaments
B. can lead to injury
C. Decreases blood flow to extrmities
D. Is especially important during physical activity
Answer:
D
Explanation: need good posture other wise will injury yourself during activity
How much thermal energy is absorbed by
1.00X102 g of ice at -20.0°C to become
water at 0.0°C?
Answer:
4202.4 J
Explanation:
The formula for calculating the heat absorbed by ice to melt into water is given by :
ΔH = Cp × m × Δ T -------where ;
Cp =specific heat of ice = 2.06 J/g° C
m= mass of ice = 102 g
ΔT = 0°C--20°C = 20°C
Thermal energy absorbed by the ice will be;
ΔH = Cp × m × Δ T
ΔH = 2.06 * 102 * 20
ΔH =4202.4 J
A trolley of 20kg move 60 gm.Find out the work done by the trolley.
Answer:
11760
Explanation:
m= 20kg
d= 60 m
work done = force .distance= 20*9.8*60= 11760Nm