Answer:
V = 3.97 m/s
Explanation:
Mass of a man, M = 85 kg
Mass of a bullet, m = 8 g = 0.008 kg
Speed of bullet, v = 410 m/s
We need to find the speed of a man in order to have the same kinetic energy as that of the bullet. Let the kinetic energy of the bullet is k. So,
[tex]k=\dfrac{1}{2}mv^2\\\\k=\dfrac{1}{2}\times 0.008\times 410^2\\\\k=672.4\ J[/tex]
Since, k = K (K is the kinetic energy of the man and Let V is the speed)
[tex]K=\dfrac{1}{2}MV^2\\\\V=\sqrt{\dfrac{2K}{M}} \\\\V=\sqrt{\dfrac{2\times 672.4}{85}} \\\\V=3.97\ m/s[/tex]
So, the speed of the man is 3.97 m/s.
We have that for the Question "How fast would a(n) 85 kg man need to run in order to have the same kinetic energy as an 8.0 g bullet fired at 410 m/s?" it can be said that the speed is
v=4.0m/s
From the question we are told
How fast would a(n) 85 kg man need to run in order to have the same kinetic energy as an 8.0 g bullet fired at 410 m/s?
Generally the equation for the kinetic energy is mathematically given as
[tex]K.E=1/2*m*v^2\\\\Therefore\\\\K.E=1/2*0.008*(420)^2\\\\K.E=672.4J\\\\[/tex]
Therefore
[tex]v^2=\frac{672.4*2}{85}\\\\v^2=15.821[/tex]
v=4.0m/s
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A heat engine receives heat of 400kW from a heat source of 1100 K, and rejects the waste heat into a heat sink at 320K. It generates 120 kW of power output. Determine the 2nd law thermal efficiency of the heat engine.
Answer:
Explanation:
efficiency of carnot engine operating between 1100 K and 320 K
= 1100 - 320 / 1100
= .709
efficiency of heat engine = 120 / 400 = .30
2 nd law thermal efficiency of heat engine = .30 x 100 / .709
= 42.31 % .
HURRY IM TIMED!!!!Anya knows the velocity of an object. What else does she need to know in order to find the object’s momentum? its mass its height its density its speed
Answer:
speed
and mass
Explanation:
Answer:
Mass
Explanation:
It isn´t multiple choice.
the international space station orbits the earth at a speed of 7660m/s.If it has a kinetic energy of 1.24 x 1013J, what is its mass
Answer:
4.2 x 10⁵kg
Explanation:
Given parameters:
Speed of orbit = 7660m/s
Kinetic energy = 1.24 x 10¹³J
Unknown:
Mass = ?
Solution:
Kinetic energy is the energy due to the motion of a body. It is mathematically expressed as;
K.E = [tex]\frac{1}{2}[/tex]mv²
m is the mass
v is speed
Now insert the parameters and find the mass;
1.24 x 10¹³ = [tex]\frac{1}{2}[/tex] x m x 7660²
1.24 x 10¹³ = 2.93 x 10⁷m
m = [tex]\frac{1.24 x 10^{13} }{2.93 x 10^{7} }[/tex] = 0.42 x 10⁶kg = 4.2 x 10⁵kg
If the 50 kg object slows down to a velocity of 1 m/s, how much kinetic energy does it have?
Answer:
KE = 25
Explanation:
KE = 1/2 m v^2
KE = 1/2 (50) (1)
KE = 25
A 65 kg jogger runs with a constant acceleration of 1.2 m/s/s. Determine
the net force responsible for this acceleration. *
Answer:
78 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 65 × 1.2
We have the final answer as
78 NHope this helps you
characteristics of good thermometer
The blood speed in a normal segment of a horizontal artery is 0.16 m/s. An abnormal segment of the artery is narrowed down by an arteriosclerotic plaque to one-eighth the normal cross-sectional area. What is the difference in blood pressures between the normal and constricted segments of the artery?
Answer:
The difference in blood pressures is [tex]P_1 -P_2 = 854.8 \ Pa[/tex]
Explanation:
From the question we are told that
The blood speed in a normal segment is [tex]v_1 = 0.16 \ m/s[/tex]
The area of the normal segment is [tex]A_1[/tex]
The area of the abnormal segment is [tex]A_2 = \frac{A_1}{8}[/tex]
Generally from continuity equation we have that
[tex]v_1 A_1 = v_2 A_2[/tex]
=> [tex]v_1 A_1 = v_2 * \frac{A_1}{8}[/tex]
=> [tex]0.16 = v_2 * \frac{1}{8}[/tex]
=> [tex]v_2 = 1.28 \ m/s[/tex]
Generally from Bernoulli's equation the difference in pressure is mathematically represented as
[tex]P_1 -P_2 = \frac{1}{2} \rho (v_2^2 - v_1^2 ) [/tex]
Here [tex]\rho[/tex] is the density of blood with value [tex]\rho = 1060 \ kg /m^3[/tex]
[tex]P_1 -P_2 = \frac{1}{2} (1060) ( 1.28 ^2 - 0.16 ^2 ) [/tex]
=> [tex]P_1 -P_2 = 854.8 \ Pa[/tex]
Please help I’m so desperate I’m giving about all my points
Answer:
1 and 5
Explanation:
potential energy is movement energy, and at 1 and 5 there is a lot of kinetic energy (built up energy) and not a lot of potential energy
What 2 things define the state of matter?
Answer:
mass and volume
Explanation:
matter is anything that has mass and occupies space(volume)
Answer:
Four states of matter are observable in everyday life: solid, liquid, gas, and sometimes plasma.
Shape is a characteristic property of matter.
The amount of matter in an object doesn't really affect the characteristic properties of the object
Explanation:
A jet plane flying 600 m/s experiences an acceleration of 4.0 g when pulling out of the circular section of a dive. What is the radius of curvature of this section of the dive?
Answer:
The radius is [tex]r = 9183.7 \ m[/tex]
Explanation:
From the question we are told that
The speed of the jet plane is [tex]v = 600 \ m/s[/tex]
The acceleration is [tex]a = 4g[/tex] here [tex]g = 9.8 \ m/s^2[/tex] so [tex]a = 4* 9.8 = 39.2 \ m/s^2[/tex]
Generally the centripetal acceleration of the jet just before it pulled out of the circular section dive is mathematically represented as
[tex]a = \frac{v^2}{r}[/tex]
=> [tex]r = \frac{v^2}{a}[/tex]
=> [tex]r = \frac{600^2}{39.2}[/tex]
=> [tex]r = 9183.7 \ m[/tex]
If a wind instrument, such as a tuba, has a fundamental frequency of 56.0 Hz, what are its first three overtones (in Hz)? It is closed at one end. (The overtones of a real tuba are more complex than this example, because it is a tapered tube.)
Answer:
168 Hz, 280 Hz and 392 Hz
Explanation:
The resonant frequencies for a closed pipe at one end is given by :
[tex]f=\dfrac{nv}{4L}[/tex], n = 1,3,5...
The fundamental frequency, f₁ = v/4l = 56 Hz
For first overtone, put n = 3
[tex]f_3=\dfrac{3v}{4L}\\\\=3\times \dfrac{v}{4L}\\\\=3\times 56\\\\=168\ Hz[/tex]
For second overtone, put n = 5
[tex]f_5=5\times f_1\\\\=5\times 56\\\\=280\ Hz[/tex]
For third overtone, put n = 7
[tex]f_7=7\times f_1\\\\=7\times 56\\\\=392\ Hz[/tex]
So, the first three overtones are 168 Hz, 280 Hz and 392 Hz.
A mass of 1 kg is moving in a circle of radius 3.3 meters. What is the liner velocity v m/s that would give a Centripetal Force of 23 N?
Answer:
The linear velocity of the object is 8.71 m/s.
Explanation:
Given;
mass of the object, m = 1 kg
radius of the circle, r = 3.3 meters
centripetal force, F = 23 N
Centripetal force is given by;
[tex]F_c = \frac{mv^2}{r}\\\\[/tex]
where;
v is the linear velocity of the object
[tex]F_c = \frac{mv^2}{r}\\\\mv^2 = F_cr\\\\v^2 = \frac{F_cr}{m}\\\\v= \sqrt{\frac{F_cr}{m}} \\\\v= \sqrt{\frac{23*3.3}{1}}\\\\v = 8.71 \ m/s[/tex]
Therefore, the linear velocity of the object is 8.71 m/s.
A labor push a crate through 12m and 720 J of work .The magnitude of force was
Answer:
60 NExplanation:
The magnitude of the force can be found by using the formula
[tex]f = \frac{w}{d} \\ [/tex]
w is the workdone
d is the distance
From the question we have
[tex]f = \frac{720}{12} = 60 \\ [/tex]
We have the final answer as
60 NHope this helps you
7. Two capacitors, 5.8 µF and 2.1 µF, are connected in parallel. A 3 V DC voltage is applied across the capacitors. What would be the expected accumilative charge stored in the capacitors
Answe thanks for the freee points UwU
Explanation:
Which units could not be units for speed or velocity?
A. km/hr
B. m/kg
C. cm/min
D. mm/s
I'm pretty sure the answer is B. m/kg
A tape diagram. 0 dollars is 0 percent. Question mark dollars is 23 percent. 52 dollars is 100 percent. Jared has earned 23% of the $52 he needs to buy a new jacket. Find 23% of $52. Which expression can you use to find 23% of 52? 23% of $52 is $ . An easy way to check your answer is to use the friendly and divide 52 by to get .
Answer:
Jared has earned 23% of the $52 he needs to buy a new jacket. Find 23% of $52.
Which expression can you use to find 23% of 52?
✔ 0.23 × 52
23% of $52 is $
✔ 11.96
.
An easy way to check your answer is to use the friendly
✔ 25%
and divide 52 by
✔ 4
to get
✔ 13
.
Explanation:
what energy will be the highest at the bottom of a swing's path. (Hint: think
of energy in motion)
Answer:
Kinetic energy
Explanation:
The swing will have potential energy at all points before the lowest, where it will all be converted to kinetic.
A 913 kg car travels around a curve with a radius of 268 meters at a constant speed of 11 m/s. Calculate the cars acceleration
Answer:2.22
Explanation:
A certain superconducting magnet in the form of a solenoid of length 0.56 m can generate a magnetic field of 6.5 T in its core when its coils carry a current of 80 A. The windings, made of a niobium-titanium alloy, must be cooled to 4.2 K. Find the number of turns in the solenoid.
Answer:
The value is [tex]N =36203 \ turns[/tex]
Explanation:
From the question we are told that
The length of the solenoid is [tex]l = 0.56 \ m[/tex]
The magnetic field is [tex]B = 6.5 \ T[/tex]
The current is [tex]I = 80 \ A[/tex]
The desired temperature is [tex]T = 4.2 \ K[/tex]
Generally the magnetic field is mathematically represented as
[tex]B = \frac{\mu_o * N * I }{L }[/tex]
=> [tex]N = \frac{B * L }{\mu_o * I }[/tex]
Here [tex]\mu_o[/tex] is the permeability of free space with value
[tex]\mu_o = 4\pi * 10^{-7} N/A^2[/tex]
So
[tex]N = \frac{6.5 * 0.56 }{ 4\pi * 10^{-7} * 80 }[/tex]
=> [tex]N =36203 \ turns[/tex]
How many shots does one get when he fouls a shooter? (basketball)
Answer:
Depends on where he was fouled
If it is beyond the 3 pt line, then it is 3
If it is within the 2 pt line, then it is 2
I hope that helps :)
Explanation:
Plz mark B R A I N L I E S T
Is a ball standing still potential or kinetic?
What term refers to substance in the environment that can cause abnormal fetal development
Answer:
Teratogens
Explanation:
Teratogens are substances or other factors that can cause congenital abnormalities, which are also called birth defects. Usually these abnormalities arise in the third to eighth weeks of pregnancy, when the major organ systems are forming.
Which of the following is an example of an insulator?
A- metal spoon
B- weather stripping
C-iron skillet
D-glass
Answer:
Hey mate
Answer is glass
How does a magnetic field cause electric charges to form an electric current? O A. A force is exerted by the magnetic field on only the positive charges in the wire. B. Negative charges and positive charges are pushed in opposite directions by the magnetic field. C. A force is exerted by the magnetic field on only the negative charges in the wire. D. Negative charges and positive charges are pushed in the same direction by the magnetic field.
Answer:
Negative charges and positive charges are pushed in opposite directions by the magnetic field.
Explanation:
Just trust me.
The magnetic field causes electric charges to form an electric current which is responsible to push the positive and negative charges in the opposite direction because there is a magnetic field working as a magnetic effect of the electric current which results in negative charges and positive charges being pushed in opposite directions by the magnetic field. Therefore the correct option is B.
What is a magnetic field?A magnetic field could be understood as an area around a magnet, magnetic material, or an electric charge in which magnetic force is exerted. The SI unit of the magnetic field is tesla.
The magnetic field is responsible for electric charges to form an electric current which results in pushing the positive and negative charges in the opposite direction.
There is a magnetic field working as a magnetic effect of the electric current which results in negative charges and positive charges being pushed in opposite directions by the magnetic field. Therefore the correct option is B.
Learn more about the magnetic fields from here
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Coc and ball torture (CBT), ponies torture or dic torture is a sexual activity involving application of pain or constriction to the ponies or testcool. This may involve directly painful activities, such as genital piercing, wax play, genital spanking, squeezing, ball-busting, genital flogging, urethral play, tickle torture, erotic electrostimulation or even kicking. The recipient of such activities may receive direct physical pleasure via masochism, or emotional pleasure through erotic humiliation, or knowledge that the play is pleasing to a sadistic dominant. Many of these practices carry significant health risks
Answer:
CABT
Explanation:
Answer:
this is very valuable information
Explanation:
thanks for letting me know ahead of time
Jerry's boat capsized last Saturday, he had been fishing with a friend. His friend made it to shore and went
for help, but it was too late. The boat was pulled out of the river and taken to the police station, Jerry's body
was found floating in the missouri river the next day. The police assumed after speaking with the friend, that
Jerry drowned, but a quick look at the body by the ME and the manner of death had to be listed as pending
investigation. The ME found petechial hemorrhaging and there was no water in his lungs.
What do you think actually happened? Provide evidence and reasoning for your claim
HELPPP
Answer:
the friend strangled Jerry to death then went to get help.
Explanation:
A small barge is being used to transport trucks across a river. If the barge is 10.00 m long by 8.00 m wide and sinks an additional 3.85 cm into the river when a loaded truck pulls onto it, determine the weight of the truck and load.
Answer:
30214 N
Explanation:
To start with, we solve this problem by applying Archimedes’ principle. We say that the weight of the truck and the weight of load is equal to the weight of the additional water displaced when the truck and the load moves onto the barge. Thus,
Volume of water displaced = 10.00 m * 8.00 m * 0.0385 m = 3.08 m³.
Density of water = 1000kg/m³
Mass of water displaced = volume * density
Mass of water displaced = 3.08 * 1000 = 3080 kg
Weight of water displaced (mg) = 3080 x 9.81 = 30214 N
Therefore, the Weight of truck + load = 30214 N
uses of concave lens
Answer:
Concave Lens Uses. Telescope and Binoculars Spectacles Lasers Cameras FlashlightsPeepholes. ...
Used in telescope and binoculars. ...
Concave lens used in glasses. ...
Uses of concave lens in lasers. ...
Use of concave lens in cameras. ...
Used in flashlights. ...
Concave lens used in peepholes.
PLEASE HELP!!!!
On his quest to find a shrubbery for the "Knights Who Say Ni!", King Arthur rides his horse off a 15m cliff and lands 4.3m away.
What was his original horizontal velocity?
Answer:
v = 2.45 m/s
Explanation:
first we find the time taken during this motion by considering the vertical motion only and applying second equation of motion:
h = Vi t + (1/2)gt²
where,
h = height of cliff = 15 m
Vi = Initial Vertical Velocity = 0 m/s
t = time taken = ?
g = 9.8 m/s²
Therefore,
15 m = (0 m/s) t + (1/2)(9.8 m/s²)t²
t² = (15 m)/(4.9 m/s²)
t = √3.06 s²
t = 1.75 s
Now, we consider the horizontal motion. Since, we neglect air friction effects. Therefore, the horizontal motion has uniform velocity. Therefore,
s = vt
where,
s = horizontal distance covered = 4.3 m
v = original horizontal velocity = ?
Therefore,
4.3 m = v(1.75 s)
v = 4.3 m/1.75 s
v = 2.45 m/s
A 50-g ball moving at 10 m/s in the +x direction suddenly collides head-on with a stationary ball of mass 100 g. If the collision is perfectly elastic, what is the velocity of each ball immediately after the collision?A. +6.7 m/s, -3.3 m/sB. -6.7 m/s, +3.3 m/sC. +3.3 m/s, -6.7 m/sD. -3.3 m/s, +6.7 m/s
Answer:
3.33m/sExplanation:
Using the law of conservation of momentum
m1u1 + m2u2 = (m1+m2)v
m1 and m2 are the masses of the object
u1 and u2 are the velocities
v is the final velocity
Given
m1 = 50g
u1 = 10m/s
m2 = 100g
u2 = 0m/s (stationary ball)
Required
Common velocity v
Substitute
50(10) + 100(0) = (50+100)v
500 = 150v
v = 500/150
v = 3.33m/s
Hence the velocity of each ball immediately after the collision is 3.33m/s