Answer:
Time,
t
=
3.1
s
Temperature,
T
=
23.0
∘
Speed of the sound at
23.0
∘
can be given as,
{eq...
A car is traveling at a speed of 9.88 m/s. It travels for 9.71 seconds. what distance did the car travel
Answer:
it should be 21,3 kilometer
What’s the difference between jumping with ur leg straight and ur leg bend
What is the amount of work needed to lift a book weighing 20.0n a distance of 2.0m
Answer:
w = 40 Joules
Explanation:
Formula to get work:
W = F × S
where:
w = work/Joules
F = force/newtons
s = displacement/meters
substitute:
w = 20 × 2
w = 40J
In an experiment for measuring the speed of sound gun was shot 715 m away from the observer. It was heard 2. 13 seconds after the flash was seen. What was the speed of sound in air at that time?
The speed of the sound wave after the flash was seen, in the experiment for measuring the speed of sound gun is 110 m/s.
Speed of the sound waveThe speed of the sound wave can be determined by applying the principle of echoe as shown below;
v = 2d/t
where;
d is the distance of the sound wavet is time of motionv = (2 x 715) / (13)
v = 110 m/s
Thus, the speed of the sound wave after the flash was seen, in the experiment for measuring the speed of sound gun is 110 m/s.
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A wave has a frequency of 20.0 Hz and a velocity of 5.0 m/s. What is its wavelength?
Answer:
0.25 m
Explanation:
λ = v/f
I hope it helped you
he electric motor of a model train accelerates the train from rest to 0.720 m/s in 29.0 ms. The total mass of the train is 840 g. Find the average power delivered to the train during its acceleration. W
Answer:
7.481W
Explanation:
power= work done÷time
power= force × uniform velocity
a= ∆v/t
29.0ms=
[tex]29 \times {10}^{ - 3 } s [/tex]
=(0.72-0)÷29×10^-3
a=24.83m/s^2
Newton's second law
f=ma
=(0.84×24.83)
=20.86N
w=FD
v^2=u^2+2as
0.5184=0+49.66s
s=0.0104m
20.86×0.0104
=0.216944J
0.216944÷t
P=7.481W
Can anyone help me?
Answer:
option d is your answer
Explanation:
you can find the complete solution in the given attachment
I hope it helped you
8.54 Three identical balls of mass m are placed in the con-
figuration shown in the
figure. Find the location
(0, a)
of the center of mass.
50
(0,0)
(a,0)
The center of mass is the point located in an average position concerning the objects' positions and their masses. (a/3;a/3) is the location of the COM.
What si the center of mass?
The center of masses of a given system of particles or objects is the position under which all external forces are acting. Any uniform force acts on this point.
This position is the average position of all the components of the system concerning their masses. It can be placed in one, two or three dimensions according to the system.
Coordinate X of the center of masses is given by the following formula,
Xcom = Σ(Ximi) / Σmi
This is the adition (Σ) of each particle position on the X-axis (Xi) multiplied by their mass (mi), and the result divided by the summation of all masses -total mass-.
In the same way, coordinate Y of the center of masses is given by the following formula,
Ycom = Σ(Yimi) / Σmi
This is the adition (Σ) of each particle position on the Y-axis (Yi) multiplied by their mass (mi), and the result is divided by the summation of all masses.
The center of masses is located in the position (X, Y).
According to this framework, we can get the coordinates of the center of masses for this bidimensional system. Coordinates can be expressed in meters or centimeters (m or cm).
Data:
Particle ⇒ (X;Y)
Ball 1 ⇒ (0;a)Ball 2 ⇒ (0;0)Ball 3 ⇒ (a;0)Coordinate X ⇒ Xcom = Σ(Ximi) / Σmi
Xcom = (0m) + (0m) +(am) / m +m +m
Xcom = am / 3m
Xcom = a/3
Coordinate Y ⇒ Ycom = Σ(Yimi) / Σmi
Ycom = (am) + (0m) +(0m) / m +m +m
Ycom = am / 3m
Ycom = a/3
Coordinates of the center of masses, (X;Y) = (a/3 ; a/3)
(a/3 ; a/3) is the location of the center of mass in the proposed bidimensional system.
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Seeds are often found on which part of a gymnosperm?
branch
leaf
cone
stem
True or False [2 pts]: As the distance d between a planet and a moon is increased, the strength of tidal forces decreases linearly (i.e., the strength of tides scales as 1/d).
It is true that as the distance d between a planet and a moon is increased, the strength of tidal forces decreases linearly (i.e., the strength of tides scales as 1.
What is Tidal force?.Tidal force is the gravitational force that a body on a linear motion experiences which pull the body towards the center of the mass of another varying body because of the gravitational pull of that body at a distance.
Therefore, It is true that as the distance d between a planet and a moon is increased, the strength of tidal forces decreases linearly (i.e., the strength of tides scales as 1.
Learn more about tidal force below.
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A baseball is flying through the
air at 40 m/s east. This
measurement represents the
ball's
A. speed
B. velocity
C. inertia
D. force
Answer:
b
Explanation:
it indicate direction of baseball
how many levels does the philippine physical activity pyramid have?
Read the length of the metal bar with the correct number of significant figures. 15.000 cm 20 cm 15.0 cm 15 cm 15.00 cm
The correct number from the options to describe the length of this metal bar is 15 cm or fifteen centimeters.
What are the units used to measure length?The most common units to measure length include:
CentimeterMeterKilometerMilesHow much does this bar measure?The unit that should be used is centimeters, considering a rule usually contains centimeters, and this is the unit provided in the image.
Moreover, based on the rule it can be determined the length is 15 centimeters. Other numbers such as 15.0 or 15.000 are innaccurate as there is not need to add more figures in this case.
Note: This question is incomplete because the image is missing. Here is the image
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The mass of a body is 25 kg and the value of acceleration due to gravity is 9.8 m/s2. Calculate the weight of body
Explanation:
[tex]w = mg \\ w = 25kg \times 9.8 \frac{m}{s} ^{2} \\ w = 245\\ [/tex]
Which reduces friction, to roll or to slide?
How do you know where the centre of curvature(c) and the focal point(f) is on the principle axis
Answer:
C is radius of sphere
Explanation:
F is C/2
what must be the acceleration of a box that is pushed with 86N of force and experiences 29N of friction? The mass of the box is 5kg
F_net:-
86N-29N57NNow
Apply Newton's second law
F=ma57=5aa=57/5a=11.4m/s²The process of going from having work done by muscle to being done by machines is: ________-
Answer:
Mechanization perhaps
Explanation:
Which of the following affects the strength of electric attraction/repulsion more: The magnitude of the charge or the distance between them?
(Standard SPS10 c)
A. The magnitude
B. The distance
C. Neither. They affect the strength the same amount ос
Answer:
Distance between them (r^2 )
Explanation:
F = C q1q2/r^2
A driver needs to make a delivery to an office that is 30 km away. The driver has traveled for 45 minutes west down a straight road at 50 km/h. a. Has the driver traveled far enough to reach the office? Support your response.
Answer:
Yes, the driver has traveled far enough to reach the office.
Explanation:
Starting at 50 km/h you can break the 50 into 4 sections (50/4 or 1/4 of 50) and that will get you 12.5
45 minutes are 3/4 of an hour which is 50 km/h.
12.5*3=37.5 km (37.5>30)
The first spacecraft to make detailed maps of the galilean satellites of jupiter was/were.
Answer:
Voyager 1 and 2
Explanation:
What are some examples of why parallel circuits are good for everyday life?
Explanation:
Parallel circuits are used in wiring almost everything in buildings. You use them to turn on the lights in a room, Use a blow dryer, or plug anything into an outlet
Is cereal consider soup?
Answer:
Explanation:
I guess so because it has ingredients such as froot loops, frosted flakes, and such plus its liquid.
How is thermal energy transferred during conduction? check all that apply.
Answer:
Conduction is the process by which heat energy is transmitted through collisions between neighboring atoms or molecules
Explanation:
How does your Liver work with your Bladder in your body?
Answer:
The liver filters the blood of toxins before it continues through the body. It also removes excess sugar from the arteries. Your kidney then further filters the blood for water-soluble waste and toxins to be excreted and finally, your bladder gets read of that water-soluble waste.
6. The star nearest to our Sun is Alpha Centauri, which is 4.3 light years away. A light
year is the distance that light travels in one year. 1 light year is about
9,500,000,000,000kilometers. Again, use the unit cancelation technique:
How many astronomical units is it to Alpha Centauri? HELP
Answer:
273,000 Astronomical Units.
Explanation:
4.3 light years = 40,850,000,000,000 kilometeres, 4.3 x 9,500,000,000,000.
Convert kilometers to astronomical unit:
149,597,870 kilometers = 1 AU, convert unit.
40,850,000,000,000 divided by 149,597,870 = 273,065.385222 or approx. 273,000 AU.
What is meant by a zero error in an ammeter?
Answer:
When the circuit is not connected, the pointer of the ammeter or voltmeter is exactly at zero, thus said to be the instrument has zero error. If the pointer is above the zero mark, the zero error is negative.
This man is jumping through the air what are forces use
Answer:
Thrust / Lift / Gravity
Explanation:
He must create enough force of thrust to jump for a short time and gravity pulls him back down almost immediately.
Answer:
gravity and resistance, the man is moving so the force is unbalanced
Explanation:
Light of frequency 2.5 x 1015 Hz illuminates a
piece of iron, and the iron emits photoelectrons
with a maximum kinetic energy of 6.3 eV. What is
the threshold frequency of the metal? Planck's
constant is 6.63 x 10-34 J·s.
.
Answer:
h f = W + KE
Input energy equals work function plus KE of emitted electron
W = 6.63E-34 * 2.5E15 - 6.3 * 1.6E-19
W = 6.63 * 2.5 * 10^-19 - 10.1 * E-19 ev (1ev = 1.6E-19 J)
W = (16.6 - 10.1)E-19 = 6.5E-19 J
h f = 6.5E-19 J for electrons to be emitted with zero KE
f = 6.5E-19 / 6.63E-34 = .98E-15 / sec = 9.8E-14 / sec (threshold)
how do you find spring constant from a weight (n) vs displacement (m) graph?
Answer:
Explanation:
The slope of the graph is the spring constant n/m