Answer:
A submission from India says the name Priyadharshini means "Beloved and pleasing to look at" and is of Sanskrit origin. According to a user from India, the name Priyadharshini is of Indian (Sanskrit) origin and means "God gift".
1. During an accident investigation, a detective measures the skid marks that a car
left to determine how fast it was initially moving before stopping when it hit a
light pole. The detective measures the distance to be 40 meters. The detective
receives the car's braking acceleration to be 4.57m/s2 from the manufacturer's
manual. Help the detective by solving how fast the car was initially going before
he hit the light pole? Someone please help I’ll give you a brainlest
Answer:
19.12 m/s.
Explanation:
The following data were obtained from the question:
Final velocity (v) = 0 m/s
Breaking Acceleration (a) = – 4.57 m/s²
Distance (s) = 40 m
Initial velocity (u) =.?
The initial velocity of the car can be obtained as illustrated below:
v² = u² + 2as
0² = u² + (2 × –4.57 × 40)
0 = u² + (– 365.6)
0 = u² – 365.6
Collect like terms
u² = 0 + 365.6
u² = 365.6
Take the square root of both side
u = √365.6
u = 19.12 m/s
Therefore, the car was initially moving at 19.12 m/s.
A coil of wire wrapped around an iron core is rotated in a magnetic field. Electric current begins to flow in the coil.
What type of device is this set-up?
A. a compass
B.an electromagnet
C. a generator
D.a motor
In addition to hot surface temperatures, which characteristic makes mercy different from earth
Answer:
has no air on it and no animals or plants live there.
Marion is on a train that travels 10 m/s and takes 2 seconds to slow to 5 m/s. How would you correctly calculate the acceleration?
Explanation:
t=2s
u=10
v=5
a=?
v=u+at
5=10+2a
2a=-5
a=-2.5
A ball is dropped from the ceiling and free falls to the floor. Which one of the
following statements regarding the ball's motion is correct?
a. The ball speeds up as it falls to the ground.
b. The velocity of the ball is downward; uits value remains constant.
c. The velocity of the ball has a constant value of 9.8 m/s.
US 10:30
Answer:
A
Explanation:
Gravity
• The Law of Conservation of Energy states that matter cannot be created or destroyed. So
why do people say that we need to conserve energy? (5pts)
an object 2cm high when placed in front of a converging mirror produces a virtual image 3cm high. if the object is placed at a distance of 8cm from the pole of the mirror, calculate the position of the image
Answer:
v= +12cm
Explanation:
m = (size of image)/(size of the object) = -v/u
u = - 8 cm
3/2 = -v/u
3/2 = -v/-8
v = +12 cm
Using mirror formula,
1/v + 1/u = 1/f ...(i)
1/12 + 1/(-8) = 1/f
f = -24 cm
Focal length is 24 cm
What stage of mitosis does mutations occur?!
Answer:
if it is a gene mutation then it is during the S phase, and if it is a chromosome mutation, then during metaphase or anaphase.
Explanation: I think it happens in the interphase
When a mutation occurs in mitosis, stage of Mitosis is interphase.
What is mutation?Mutation that occurs in mitosis typically causes tumor.
Genetic mutations occur during the S phase of the cell cycle i.e during interphase before mitosis begins. When DNA is replicated, error would cause a mutation in the genetic code. Chromosomal nondisjunction denotes the failure of replicated chromosomes to separate causing extra or missing chromosomes in the daughter cells to occur. This mutation can occur during mitosis.
Thus, When a mutation occurs in mitosis, stage of Mitosis is interphase.
Learn more about mutation.
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Un transformador reductor se usa para convertir un voltaje alterno de 10000 V a 500V ¿Cuál deberá ser la razón (N1/N2) entre las espiras si la corriente en el primario es de 1 amp. Y el transformador tiene un rendimiento del 100%. ¿Cuál es la corriente de salida?
Answer:
(a). The value of [tex]\dfrac{N_{1}}{N_{2}}[/tex] is [tex]\dfrac{1}{20}[/tex]
(b). The output current is 0.05 A
Explanation:
Given that,
Secondary voltage = 10000 V
Primary voltage = 500 V
Primary current = 1 A
(a). We need to calculate the value of [tex]\dfrac{N_{1}}{N_{2}}[/tex]
Put the value into the formula
[tex]\dfrac{V_{s}}{V_{p}}=\dfrac{N_{2}}{N_{1}}[/tex]
[tex]\dfrac{N_{1}}{N_{2}}=\dfrac{V_{p}}{V_{s}}[/tex]
Put the value into the formula
[tex]\dfrac{N_{1}}{N_{2}}=\dfrac{500}{10000}[/tex]
[tex]\dfrac{N_{1}}{N_{2}}=\dfrac{1}{20}[/tex]
(b). We need to calculate the output current
Using formula of current
[tex]\dfrac{I_{s}}{I_{p}}=\dfrac{N_{1}}{N_{2}}[/tex]
[tex]I_{s}=I_{p}\times\dfrac{N_{1}}{N_{2}}[/tex]
Put the value into the formula
[tex]I_{s}=1\times\dfrac{1}{20}[/tex]
[tex]I_{s}=0.05\ A[/tex]
Hence, (a). The value of [tex]\dfrac{N_{1}}{N_{2}}[/tex] is [tex]\dfrac{1}{20}[/tex]
(b). The output current is 0.05 A
Regarding Newton's 3rd Law, do we always see an equal effect on each object? Aka, are both objects always affected the same? Why so?
Answer:
not always ot depends mostly on the mass of each object and how the collode
The motion of a car on a position-time graph is represented with a horizontal line. What does this indicate about the car’s motion? A. It’s not moving. B. It’s moving at a constant speed. C. It’s moving at a constant velocity. D. It’s speeding up. i dont know if ive asked this before if i have sorry
When objects are charged by _______, they do not need to touch each other.
A.
friction
B.
induction
C.
conduction
D.
all of these
Answer:
B. Induction
Explanation:
Just had it on study island
When objects are charged by induction, they do not need to touch each other. Hence, option (B) is correct.
What are different process of charging?A charged particle is touched to a conductive medium as part of the charging by conduction process. In this manner, the conductor receives the charges from the charged substance.
Rubbing one particle against another causes electrons to move from one surface to another during the charging by friction process.
An object is charged using induction charging, which doesn't require physical contact between the charged objects. The charged particle is held close to an uncharged conductive substance that is grounded on a neutrally charged material during the charging by induction process.
When a charge is transferred between two objects, an uncharged conductive substance produces an oppositely polarized charge. These were the many charge transfer techniques.
Learn more about charges here:
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Anyone know? /——&/&:&:&:!:’dnndndndnd
Answer:
Explanation:
1.25 m/s
Starting from rest, a car travels 18 meters as it accelerates uniformly for 3.0 seconds. What is the magnitude of the car's acceleration? A. 6.0 m/s2 B. 2.0 m/s2 C. 3.0 m/s2 D. 4.0 m/s2
Answer:
D. 4 m/s²
Explanation:
Given;
initial velocity of the car, u = 0
distance traveled by the car, s = 18 m
time of motion of the car, t = 3.0 s
The magnitude of the car's acceleration is given by;
s = ut + ¹/₂at²
s = 0 + ¹/₂at²
s = ¹/₂at²
2s = at²
a = 2s / (t²)
a = ( 2 x 18) / (3²)
a = 4 m/s²
Therefore, the magnitude of the car's acceleration is 4 m/s²
Which is a sedimentary rock?
A: cools down
B: has large crystals
C: forms in layers
D: is formed from pressure and heat
ANSWER ASAP!!!
Answer:
d. is formed from pressure and heat
Explanation:
it is formed from hot magam
TIME REMAINING
52:45
The robotic rover Curiosity has instruments that detect radiation both inside the spacecraft and in the Mars environment. What is most likely the purpose of this radiation detection?
to determine whether human exploration of Mars is possible
to develop better X-ray technology
to find evidence of once-living Martian microorganisms
to investigate evidence of hydrogen and water
Answer:
D
Explanation: just trust me
A 10 kg ball is traveling at the same speed as a 1 kg ball. Compared to the 10 kg ball,the 1 kg ball has what?
Answer:
I would say that the 1 kg ball weighs 1 kg. I don't see the answer choices.
A body of mass 10 kg is pulled by a force 8 N. calculate the acceleration and the the final velocity of the body after 5 second.
What is the density of 244 grams of aluminum that has a volume of 90 ml?
Answer:
The answer is 2.71 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass = 244 g
volume = 90 mL
So we have
[tex]density = \frac{244}{90} = \frac{122}{45} \\ = 2.71111111...[/tex]
We have the final answer as
2.71 g/mLHope this helps you
A microwave oven operates on 1500 W of power and is used for 30 minutes. How
much electrical energy, in kW. h, is used by the microwave oven?
Answer:
i think the answer is 50 kW.h
3. How many elements are found naturally on the Farth? *
Answer:
Fir wat glasss
Explanation:
calculate the kinetic energy possessed by a uniformly moving body of mass 40 kg if it covers 800m in 40 seconds
Answer:
400J
Explanation:
s=d/t
s=800/40
s=20m/s
K.E= 1/2mv^2,
=1/2*40*20
=400 J
Stars go through a life cycle. What is the expected outcome for a star much more massive than the sun?
Answer:
Big stars, about 5 - 25 times the mass of sun, usually they collect so much of matter and energy that they just explode, this explosion is called supernova. A supernova is a powerful and luminous stellar explosion. This astronomical event occurs during the last evolutionary stages of a massive star.
If my answer helped, please mark me as the brainliest!!
Thank You!
21. The speed of light is approximately 3.00 x 108 m/s. What is the speed of light in miles per hr?
Answer:
6.7*10^8 mi/hr
Explanation:
(3*10^8 m)/1s * (3600 s)/ 1 hr * (1 mi)/ 1609 m
6.7*10^8 mi/hr
Which is the process by which a solid changes to a liquid?
Answer:
melting.
Explanation:
The process in which a solid changes to a liquid is called melting. The melting point is the temperature at which a solid changes to a liquid.
A softball is thrown perfectly vertically (straight-up) at 18 m/s.
a) How high will it go?
b) Find the total time the ball is in the air.
Answer:
a) y = 16.51 [m]
b) t = 1.83 [s]
Explanation:
To solve this problem we must use two kinematics equations, the first to determine the height to which the ball reaches, and the second equation to determine how long it lasts in the air.
[tex]v_{f} ^{2}= v_{i} ^{2} - (2*g*t)\\[/tex]
where:
Vf = final velocity = 0
Vi = initial velocity = 18 [m/s]
g = gravity acceleration = 9.81[m/s^2]
t = time [s]
Note: the negative sign of the Equation indicates that the acceleration of gravity acts in the opposite direction to the movement of the ball. The final velocity is zero, since the ball reaches its maximum altitude when the velocity is zero.
Now replacing:
0 = (18)^2 - (2*9.81*y)
y = 16.51 [m]
b)
[tex]v_{f} = v_{i} - (g*t)[/tex]
0 = 18 - (9.81*t)
t = 1.83 [s]
A ball is rolled at a velocity of 12 m/sec. After 36 seconds, it comes to a stop. What is the acceleration of the ball?
Answer:
Given -
Initial velocity of the ball, u = 0 m/sfinal velocity of the ball, v = 12 m/sTime taken = 36 sec[tex] \\ [/tex]
To find -
Acceleration of the ball.[tex] \\ [/tex]
Solution -
[tex] \\ \sf \: A = \frac{v - u}{t} \\ \\ \\ \implies \sf \: A = \frac{12 - 0}{36} \\ \\ \\ \implies \sf \: A = \frac{12}{36} \\ \\ \\ \implies \sf \underline{A = 0.33 \: m \: / {s}^{2} } \\ [/tex]
Therefore, the acceleration of the ball is 0.33 m/s².
Could society survive without energy transformations? Explain your reasoning.
are unicorns real or not
Answer:
no lol
Explanation:
Drag each tile to the correct box.
Arrange the steps in order to describe what happens to a liquid when it is heated.
The particles of liquid move faster.
The liquid changes to a gas.
The liquid gains thermal energy.
The space between the liquid particles
increases.
the space between the liquid. particles. increase. the particles of liquid. move faster the liquid gains thermal energy the liquid change. to gas.
Answer:
the space between the liquid. particles. increase. the particles of liquid. move faster the liquid gains thermal energy the liquid change. to gas.
Explanation: