What is the velocity of an 80 kg person skating across the ice with a kinetic energy of 16, 000 joules?
Answer:
V = 20 m/s
Explanation:
Given the following data;
Mass = 80kg
Kinetic energy = 16,000 joules
To find the velocity;
Kinetic energy can be defined as an energy possessed by an object or body due to its motion.
Mathematically, kinetic energy is given by the formula;
[tex] K.E = \frac{1}{2}MV^{2}[/tex]
Where;
K.E represents kinetic energy measured in Joules.
M represents mass measured in kilograms.
V represents velocity measured in metres per seconds square.
Substituting into the formula, we have;
16000 = ½*80*V²
16000 = 40V²
V² = 16000/40
V² = 400
Taking the square root of both sides, we have;
V = 20 m/s
Water uptake to the atmosphere occurs through the processes of evaporation and transpiration from plants where it condenses to form clouds. Clouds release the water through precipitation. During a summer of extreme drought, what can we expect to happen to the surface groundwater stored in ponds and lakes?
a. Water levels will increase because there is more precipitation
b. Animals won't drink as much to save water, so water levels remain the same
c. Water levels will increase because there are more evaporation and transpiration
d. Water levels will decrease because there are more evaporation and transpiration
water level will decrease because there are more evaporation and transpiration
The technique called ____ uses a high-speed computer to monitor atmospheric distortion and adjust the optics of a telescope to partially compensate for the seeing. The technique called ____ uses a high-speed computer to monitor atmospheric distortion and adjust the optics of a telescope to partially compensate for the seeing. adaptive optics photometry interfermometry chromatic aberration spherical aberration
Answer:
adaptive optics.
Explanation:
Light wave can be defined as an electromagnetic wave that do not require a medium of propagation for it to travel through a vacuum of space where no particles exist.
A lens can be defined as a transparent optical instrument that refracts rays of light to produce a real image.
A telescope can be defined as an optical instrument or device which comprises of a curved mirror and lenses used for viewing distant objects i.e objects that are very far away such as stars and other planetary bodies.
The technique called adaptive optics uses a high-speed computer to monitor atmospheric distortion and adjust the optics of a telescope to partially compensate for the seeing.
Basically, adaptive optics is used by astronomers to correct the distortions caused by the turbulence of the atmospheric conditions of the Earth in real-time, so as to have an image that is as sharp as anyone taken in space.
Regina is making observations of waves from different sources. She wants to classify the waves as either mechanical or electromagnetic. Which question will BEST help Regina to classify the waves?
A.
Can the wave transfer matter?
B.
Can the wave transfer energy?
C.
Can the wave travel through a vacuum?
D.
Can the wave travel through a liquid?
Answer:
A. Can the wave transfer matter?
Explanation:
EMW is made by vibrations of the charged particles and they work on a mechanical waveform. The energy is transferred through a vacuum and thus they need a medium to pass the energy. Thus in order to transport the energy from one place to another, such as a sound wave. Hence first she should have knowledge about the chemical and physical properties of the waves such as can they transfer matter.pls help will mark brainliest
Answer: a!! Bc 10x2=20!
Explanation:
Answer:
20N
Explanation:
F=m*a
F=10*2
F=20N
.....
Thermal equilibrium is when objects are not at equal temperature
True or false
Answer:
false
Explanation:
equilibrium means equal
therefore thermal equilibrium means when objects are at equal temperature
Does gravity affect kenetic energy
Answer:
Yep.
Explanation:
In physics, the kinetic energy of an object is the energy that it possesses due to its motion. Gravity will pull the object down. So yes, gravity affects kinetic energy.
Answer:
Kinetic energy is energy an object has because of its motion. A ball held in the air, for example, has gravitational potential energy. If released, as the ball moves faster and faster toward the ground, the force of gravity will transfer the potential energy to kinetic energy.
Explanation:
PLS ANSWER FAST WILL GIVE BRAINLEST!!!!!!!!!
what is the relationship between speed and kinetic energy? (In other words, how are the two related to one another?) Explain.
Answer:
The kinetic energy of an object is directly proportional to the square of its speed. That means that for a twofold increase in speed, the kinetic energy will increase by a factor of four.
Found it on the internet
Explanation:
Hope this helps dude
Brady chucks a water balloon at Russell in the lunchroom. Running for his life, Russell travels 147m in 9.8s. What was his speed?
The2 archer uses a force of 120 N. The force acts on an area of 0.5 cm2 on the archer's fingers. . Calculate the pressure on the archer's fingers.
Answer:
Pressure = 24000 N/m²
Explanation:
Given the following data;
Force = 120N
Area = 0.5cm² to meters = 0.5/100 = 0.005 m²
To find the pressure;
Pressure= force/area
Pressure= 120/0.005
Pressure = 24000 N/m²
Therefore, the pressure on the archer's fingers is 24000 Newton per meters square.
The pressure on the archer's finger will be [tex]P=240 \ \frac{N}{cm^2}[/tex]
What will be the pressure?Pressure is defined as the normal force applied to the particular area. The formula is given as
[tex]P= \dfrac{F}{A}[/tex]
Here
F= Force applied
A= Area at which the force is applied
Now it is given that
F= 120 N
A= 0.5 [tex]cm^2[/tex]
Now by putting the values in the formula we get
[tex]P=\dfrac{120}{0.5} =240\ \frac{N}{cm^2}[/tex]
Thus the pressure on the archer's finger will be [tex]P=240 \ \frac{N}{cm^2}[/tex]
To know more about Pressure follow
https://brainly.com/question/991185
What is the mass of a baseball with a velocity of 30 m/s and a momentum of 6 kg•m/s?
Answer:
0.2 m/s
Explanation:
Momentum= mass x velocity
6 kg/m/s divided by 30 m/s= 0.2 m/s
A bowling ball rolls down a lane of length 19.2 m in a time of 3.0 s.
What will be the ball's average velocity?
Answer:
6.4 m/s
Explanation:
19.2/3=6.4
What is the acceleration of a bike that starts from rest and after 10s is traveling 20m/s?
Answer:
10meter per second square
Explanation:
since the bike is from rest, the initial velocity is zero and the final velocity is 20m/s . so by formula a=v-u/t
a = 20-0/10
a = 2
Which of these materials is permeable?
A negative charge of -2.5 C and a positive charge of 2.0 C are separated by 100 m. What is the force between the two charges?
Explanation:
F = k |q1| |q2| / r^2
k = 9 * 10^9
q1 = - 2.5 C
q2 = 2 C
r = 100
r^2 = (10^2)^2 = 10^4
F = (9*10^9) * ( 2.5 ) ( 2) / ( 100)^2
F = 45* 10^9 / 10^4
F = 45 * 10^9 * 10 ^ -4 = 45 * 10^5 N
F = 45 * 10 ^ 5 N
The string at the right is 6.0 meters long and is vibrating as the third harmonic. The string vibrates up and down with 45 cycles in 10 seconds.
Determine the frequency, period, wavelength, and speed for this wave
Answer:
L = 6 m n = 3 f = 45/10 = 4.5 Hz → T = 1/f = 0.22 s
wavelength = 2L/n = 2×6÷3= 4 m
speed(v) = wavelength × f = 4×4.5 = 18 m/s
Explanation:
second solution for frequency:
f= speed(v) / wavelength = nv/2L = 3×18÷(2×6) = 4.5 Hz
an ocean current moving from the equator toward a pole is
Answer:
A warm current
Explanation:
Answer:
A warm current is moving away from the equator towards the poles. The water in a warm current is warmer than the surrounding water.
To calculate the frequency of a electro magnetic wave what do you need?
plzzzz mark me brainliest if it helps you
The form of energy commonly called light is transferred by
_____ waves
Answer:
it would be electromagnetic waves
A laser produces light at 5.32x10-7 m.
What is the frequency of the light?
A. 1.77x10-6 Hz
B. 1.60x1011 Hz
C. 1.88x107 Hz
D. 5.64x1014 Hz
Answer:
D
Explanation:
speed = frequency x wavelength
speed of light in vacuum is 3.0 x 10^8
wavelength = 5.32 x10 ^-7
3.0 x 10 ^ 8 = 5.32 x 10^-7 x frequency
frequency = 5.63909 x 10^14
round it off = 5.64 x 10^14 Hz
thus the answer is D
hope this helps please mark it
What gravitational acceleration does an object experience at the instant it is released at
one Earth radius above the surface of the Earth?
A) 1.3 m/s^2
B) 2.45 m/s^2
C) 4.90 m/s^2
D) 9.7 m/s^2
Answer:
B) 2.45 m/s^2 ( not sure i just search it )
How much kinetic energy does 150kg boulder have if it is rolling down a hill with a speed of 5m/s? (KE = 1/2mv2) 375J 310J 1875J 1500J
Answer:
1875J
Explanation:
KE = 1/2mv2
=0.5 × 150kg × 5m/s^2
= 1875J
Therefore, the kinetic energy of the boulder is 1875J.
Stephen Strasburg throws out the opening pitch at Nationals Park. The ball starts at rest, but
accelerates to 42 m/s (approximately 95 mph) in the 0.02 seconds it takes to throw. If the ball
has a mass of 0.145 kg, how much force did Strasburg throw with?
Answer:
Force = 304.5 Newton
Explanation:
Given the following data;
Initial velocity, u = 0m/s (since it started from rest).
Final velocity, v = 42m/s
Time, t = 0.02 secs
Mass = 0.145 kg
To find the force;
First of all, we would have to determine the acceleration of the ball;
Acceleration = (v - u)/t
Acceleration = (42 - 0)/0.02
Acceleration = 42/0.02
Acceleration = 2100 m/s²
Now, we solve for the force;
Force = mass * acceleration
Force = 0.145 * 2100
Force = 304.5 Newton
-7 and a number 12 units to the rights of -7
Answer:
5
Explanation:
Move 12 spots to the right from -7 on the number line.
Explain how a star's absorption spectrum and the concept of red shift help support the Big Bang Theory.
Answer:
Red shift supports the big bang theory. ... The light from distant galaxies is red shifted (this tells us the galaxies are moving away from us) and the further away the galaxy the greater the red shift (this tells us that the more distant the galaxy the faster it is moving). Constellations look like they are moving because earth is rotating on it's axis.
May I have brainliest, please?
10 turns of wire are closely wound around a pencil as shown in the figure. when measured using a scale as shown, the length of total turns is obtained 25mm. then a) What is the thickness of the wire? b) Express the thickness of the wire in centimetre.
please write correct answer
Answer:
A. 2.5 mm
B. 0.25 cm
Explanation:
A. Determination of the thickness of the wire.
Number of turns (n) = 10 turns
Length (L) = 25 mm
Thickness (T) =?
T = L / n
T = 25 / 10
T = 2.5 mm
Thus, the thickness of the wire is 2.5 mm
B. Determination of the thinkness in centimetres (cm).
Thickness (in mm) = 2.5 mm
Thickness (in cm) =?
Recall:
10 mm = 1 cm
Therefore,
2.5 mm = 2.5 mm × 1 cm / 10 mm
2.5 mm = 0.25 m
Therefore, the thickness of the wire in centimetre (cm) is 0.25 cm
A girl with a mass of 60 kg can sprint at 8 m/s. What is her kinetic energy?
a.240J
b.240
c.1920 J
d.1920
Which of the following is NOT considered an invasion game or sport?
A. Lacrosse
b. Golf
c. Football
D.
Capture the Flag
Answer:
Golf
Explanation:
Golf is NOT considered an invasion game or sport
It's almost always difficult to select healthy foods at a fast-food restaurant. O True O False
Answer:
yesExplanation:
because its most likely to have chucks than heathy foodWhat is the “water cycle?”
Answer:
uhm
Explanation:
the water cycle describes the continuous moving of water on earth with steps called evaporation condensation precipitation the other one
Answer:
The water cycle consists of Evaporation, Convection, Precipitation and Collection :3
Explanation:
:3
