Answer:
the water spins the wheel wiche gives energy.
Explanation:
What is the mass of an object weighing 63 N on Earth? (Earth g = 9.8 m/s^2) *
0.1 kg
O 6.4 kg
73 kg
O617.4 kg
If cach herco in pulling with
Answer:
6.4 kg
Explanation:
From Newton's second law of motion,
F = ma
or, 63 = m * 9.8
or, 63÷9.8 = m
or, m = 6.4
Which of the following is the best way to express the dimensions of a laboratory bench (large desk)? *
1.04 m * 400 cm
1.04 m * 4.00 m
104 cm * 4.00 m
1040 mm * 4000 mm
To determine the large dimension, always big dimension should be preferred. Hence, option B is correct.
What is a dimension?An area, region, or space's length or width in one direction is referred to as a dimension in mathematics. It merely involves taking an object's length, width, and height into account.
Dimension can be expressed in any one of them, such as Length, Breadth, Width, Height, or Depth.
According to the question, the best possible way to express the dimension in 1.04 m* 4.00 m is because both the dimensions are in the same unit, so it will be easy to calculate the dimension and another thing is that all other dimensions in the option are very small, so it will take more time to measure from them because the desk is large.
Hence, measuring with 1.04 m * 4.00 m will be the more convenient and the best way as well.
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If B vectos, is added A vectos under a what
condition does the resultont vectos have a
magnitude equal to the A+B?
Answer:
when A and B are travelling opposite directions
what yall noticed about this picture please help me out
Answer:
theres a mouse lol
no
the occurrence of a natural electrical discharge of very short duration and high voltage between a cloud and the ground or within a cloud, accompanied by a bright flash and typically also thunder.
Explanation:
Can someone please answer this exactly correct and please no links
Answer:
jaja I don't remember it's been 6 years ago u don't remember nothing of that
A hammer strikes a nail with a 8 N force for 0.018 seconds. Calculate the impulse of the hammer.
Answer:
0.144
Explanation:
Impulse is defined as force multiplied by time
please mark me brainliest
if the angular diameter of an object is 15 arc seconds and it is 1.4 billion kilometers away, how big is its physical size?
the actual diameter of the object is 1.017×10⁵km
actual diameter, d = any line segment that passes through the center of the circle
angular diameter, θ = the angle that an actual diameter of an object makes.
distance, D= the actual path travel
distance of the object ,D= 1.4 billion = 1.4×10⁹km
angular diameter of an object,θ = 15arc
θ = 15 ×π/ (60×60×180) rad
[ ∵ 1 revolution = 2π = 360°×60×60]
Using the relation,
θ = d/D {angular diameter = actual diameter/ distance}
d = θD
d = 1.4×10⁹×[15×3.14/(60×60×180) ] km
= 1.017×10⁵km
This shows the actual diameter of the object is 1.017×10⁵km
It is the physical size of object.
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interior crocodile alligator i drive a chevrolet movie theater
Answer:
nah bro tesla
Explanation:
Suppose the acceleration of an elevator is 1/2 g upward, then what is the reading on the scale in the elevator.
a. 1/2 mg
b. 2 mg
c. 3/2 mg
d. m
Answer:
c. 3/2 mg
Explanation:
Given that the acceleration of an elevator is 1/2 g upward.
The reading on the scale of the elevator is the net external force acting on the elevator.
Let the force F acting on the elevator as shown,
By using Newton's 2nd law, [tex]F_{net}=ma[/tex]
where, [tex]F_{net}[/tex] is the net force acting on the elevator.
m is the mass of the elevator,
a is the acceleration of the elevator, as given a=1/2 g upward.
So, [tex]F_{net}=m\times \frac 1 2 g[/tex]
[tex]F-mg=m\times \frac 1 2 g \\\\F=mg+ \frac 1 2 mg \\\\F= \frac 3 2 mg.[/tex]
So, the reading on the scale in the elevator is [tex]\frac 3 2 mg[/tex].
Hence, option (c) is correct.
If it took 3 hours to clean 6 houses, how many houses could be cleaned in 12 hours?
Answer:
24
Explanation:
If it took 3 hours to clean 6 houses than you can figure that is 2 houses per hours. so if there are 12 hours and 2 houses an hour, you multiply 12x2 and get 24. Another way to do it is to use proportions (aka two fractions that equal eachother):
3 hours 12 hours
---------------- = ---------------
6 houses number of houses
To calculate this, we can think about how we go from 3 to 12. Well, 3x4 is 12, so we got to 12 by doing multiplying by 4. So we can multiply 6 by 4 and you get 24.
Hope it helps! have a great day :)
During a baseball game, a batter hits a high pop-up. If the ball remains in the air for 4.06 s, how high above the point where it hits the bat does it rise? Assume when it hits the ground it hits at exactly the level of the bat. The acceleration of gravity is 9.8 m/s 2 .
The height of the point where it hits the ball is 20.171 m.
When a batter hits a ball high in a baseball game,
Time till the ball remains in the air, t = 4.06 seconds.
The acceleration of gravity, g = 9.8 m/s².
The vertex value of time is half of the time, the ball remains in the air
i.e. [tex]\frac{4.06}{2}[/tex] = 2.03 s
Final velocity (v) at the maximum height will be 0
So, According to the First Equation of Motion:
v - u = gt
u = - gt
u = -9.8 × 2.03
u = -19.894 m/s
Now, by using the Second Equation of Motion:
v² - u² = 2gh
Since v = 0
[tex]h = \frac{u^{2} }{2g}[/tex]
h = [tex]\frac{19.894^{2} }{2 * 9.81}[/tex]
h = 20.171 m
The ball will rise 20.171 meter high.
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Anna is drinking a glass of water in her kitchen. The water is too warm for Anna so she decides to make it colder by adding ice. Which statement describes why the ice cubes will melt?
A. Liquid water is reacting with solid water to absorb energy.
B. Water is evaporating from the surface of the water.
C. Slow-moving molecules move out of the ice.
D. Heat from the water moves into the ice.
Answer:
D: Heat from the water moves into the ice
Answer:
D
Explanation:
Because the molecules of a solid is going to separate form each other because of the hotness of the water and then that’s how the ice cubes would melt
Which circuit would have the most electrical power?
Circut C have most electrical power, the product of the voltage and current is highest for circuit C.
Electric Power:
It can be defined as the product of the voltage and current.
P = V x I
For circuit C
P = 4.6 x 0.6 = 2.76
Since, the product of the voltage and current is highest for circuit C.
Therefore, circut C have most electrical power.
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Help please, need awsnser ASAP!
Mars has a thin atmosphere.
if it is summer solstice in the Northern Hemisphere, what is happening in the Southern Hemisphere
Answer:
Winter Solstice
find the slope of the line that passes through the following pairs of points. (10, 8) (9, 13)
A car moves 50km in the first 30 minutes and 50km in the second 30 minutes and continues in this way which motion is this -------------------------
Answer:
Uniform rectilinear movement (m. r. u.)
Explanation:
It is a continuous movement without acceleration, that is, it moves at a constant speed. The speed does not change over time, for this reason, there is no change in acceleration.
Vf = final velocity = 50/30 [km/s] = 1.67 [km/s]
Vo = initial velocity = 50/30 [km/s] = 1.67 [km/s]
The alpha decay of radon-198
part 1 of 2
A neutron in a reactor makes an elastic
head-on collision with the nucleus of an atom
initially at rest.
Assume: The mass of the atomic nucleus is
about 11.1 the mass of the neutron.
What fraction of the neutron's kinetic en-
ergy is transferred to the atomic nucleus?
part 2 of 2
In the initial kinetic energy of the neutron
is 1.77 x 10^-13 J. find its final kinetic energy.
Answer in units of J.
Answer:
for part 1 the answer is 0.303
Explanation:
An escalator is 17.4 m long. If a person stands on the escalator, it takes 47.6 s to ride from the bottom to the top. If a person walks up the moving escalator with a speed of 0.541 m/s relative to the escalator, how long does it take the person to get to the top?
Answer:
19.1 secs
Explanation:
The first step is to calculate the velocity
= 17.4/47.6
= 0.37 m/s
Therefore the time taken for the person to reach the top can be calculated as follows
= 17.4/(0.37+0.541)
= 17.4 / 0.911
= 19.1 secs
Hence the time taken is 19.1 secs
How are sound waves similar to light waves?
Answer:
Sound and light are similar in that both are forms of energy that travel in waves.
Explanation:
They both have properties of wavelength, freqency and amplitude. ... Sound can only travel through a medium (substance) while light can travel through empty space. Sound is a form of mechanical energy caused by vibrations of matter.
Answer:
When light moves from one medium (like air) to another medium (like water) it will change directions. This is a "wave-like" behavior and is called refraction. In this way light behaves like other waves such as sound waves. The speed of the light wave also changes when it moves from medium to medium.
Explanation:
1 point
How fast does a 400 kg car have to move to have a momentum of 800
kgm/s?
Answer:
2m/s
Explanation:
Given parameters:
Mass of car = 400kg
Momentum = 800kgm/s
Unknown:
Speed of the car = ?
Solution:
The momentum of a car is amount of motion it posses;
momentum = mass x velocity
Insert the parameters and solve;
800 = 400 x v
v = 2m/s
4. To get to the sandwich shop, you left home and drove 6 miles south and then 10 miles west.
If a bird flew from your house to the sandwich shop in a straight line, how far do you think the
bird would fly? Use the simulation to check your reasoning.
. What direction should it fly from your house to get to the shop?
. Explain how you could use the simulation to answer these questions.
• Explain how you could use geometry equations to answer these questions.
If a bird flew from my house to the sandwich shop in a straight line, it would travel a distance of 10.44 miles.
The direction that it should fly from my house to get to the shop is at an angle 73.30°.
Pythagorean theorem-
The position vector are
OA = -6j AB = -10iBC=3j
where
O is the position of the house
C is the position of the shop.
Now drawing a perpendicular from C to OA at P we have,
Thus we have,
PC = 10i
PA = 3j
Thus,
OP = OA - PA = -6j + 3j = -3j
OC is the resultant of CP and OP
a) Thus the magnitude of OC
| OC | = √CP^2 + OP^2
= √ (10^2 +3^2) =10.44
b) The angle made by OC with OP
tan θ = OP/CP = 10/3
θ = 73.30°
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Computer-enhanced x-rays are called __________ scans. a. tms b. pet c. ct d. mri please select the best answer from the choices provided a b c d
Computer-enhanced x-rays are called CT scans.
A CT scan is a computer-based technology and refers to the inside image of the body generated by using X-rays and advanced scientific technology.
The image shows detailed information about various body parts including bones, organs, blood vessels, veins, fat, and muscles.
CT scans are more advanced, innovative, and detailed technology compared to standard X-ray techniques.
Experts performing CT scans are known as radiology technologists or radiographers.
It differs from CAT which is the reduced form of Computer Axial Tomography.
The major difference between CT scan and MRI is that CT scan uses X-rays while MRI uses magnetic fields.
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Um avião, após deslocar-se 120 km para nordeste (NE), desloca-se 160 km para sudeste (SE). Sendo um quarto de hora o tempo total dessa viagem, o módulo da velocidade vetorial média do avião, nesse tempo, foi de A) 320 km/h. B) 480 km/h. C) 540 km/h. D) 640 km/h. E) 800 km/h.
Answer:
E) 800 km/h
Explanation:
The computation of the average vector velocity module of the plane, at that time is shown below:
The displacement vector is
d^2 = d1^2 + d2^2
where,
d1 = northeast displacement
d2 = southeast displacement
Now
d^2 = (120)^2 + (160)^2
= 14400 + 2560
= 40000
= √40000
d = 200 km
Now the average velocity is
V = ΔS ÷ Δt
= 200 ÷ 1 ÷ 4
= 200 × 4
= 800 km/h
question below
image below vvvvvv firsts gets brainiest
Answer:
4-12x
Explanation:
Please mark brainiest
can you please answer theese two qeastion
The first one is C!
I hope the answer helped! please mark brainliest and vote 5 stars! >:)
A Smart Car, which has a mass of 1000 kg, is going 20 m/s. When it hits the barrier, it stops with a time of 0.5 seconds. What is the change in momentum of the car?
Answer:
The change in momentum = -20000 kg m/s.
Explanation:
Mass m = 1000 kg
speed v₁ = 20 m/s
speed v₂ = 0 m/s
We know that,
The change in momentum
ΔP = m (Δv)
ΔP = m (v₂ - v₁)
= 1000 (0 - 20)
= 1000 (-20)
= -20000 kg m/s
Thus, the change in momentum = -20000 kg m/s.
Note: negative sign indicates that the velocity is reducing when it hits the barrier.
a string along which waves can travel is 2.70 m long and has a mass of 260.0 g. the tension in the string is 36.0 n. what must be the frequency of traveling waves of amplitude 7.70 mm for the average power to be 58.0 w?
By power transmitted by string, the frequency must be 163.31 Hz.
We need to know about power transmitted to solve this problem. The power transmitted by a wave on string can be determined by this equation
P = 1/2 . μ . ω² . A² . v
where P is the power, μ is mass per unit length of string, ω is angular speed, A is amplitude and v is wave propagation speed.
the wave propagation can be determined as
v = √(F.l/m)
where F is the string tension, l is length and m is the mass.
From the question above, we know that:
l = 2.7 m
m = 260 g = 0.26 kg
F = 36 N
A = 7.7 mm = 0.0077 m
P = 58 W
Find the mass per unit length
μ = m / l
μ = 0.26 / 2.7
μ = 0.096 kg / m
Find the wave propagation speed
v = √(F.l/m)
v = √(36. 2.7 /0.26)
v = √(373.85)
v = 19.34 m/s
Find the angular speed
P = 1/2 . μ . ω² . A² . v
58 = 1/2 . 0.096 . ω² . 0.0077² . 19.34
ω² = 1053777.29
ω = √1053777.29
ω = 1026.54 rad/s
Find the frequency
ω = 2πf
1026.54 = 2 . 3.14 . f
f = 163.31 Hz
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For an observer who stays in one spot when the source of a sound is moving,
the sound wave's:
OA. amplitude increases.
B. amplitude decreases.
OC. frequency changes.
OD. speed increases.
Answer:
Explanation:
The correct option of the given question will be option © that is frequency changes.
According to the Doppler Effect, when source is moving towards the observer then the frequency increases and when the source is moving away from the observer then the frequency decreases, but the magnitude of the amplitude in both the cases will remain same. Whereas the speed of sound waves will remain constant as it was earlier. According to this effect, when there is a relative motion between the source and the observer then there will be the change in the frequency.
So, the correct answer will be that the frequency changes.
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