Answer:
Explanation:
I need help to marysol;)
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
A piece of copper with a volume of 100cm3 has a mass of 890 g. Explain how you could use this information to find out how much mass would be in 13cm3 of copper.
plz help this q. is due today
Answer:
115.7g
Explanation:
Given parameters:
Volume of copper = 100cm³
Mass of copper = 890g
Unknown:
Mass of 13cm³ copper = ?
Solution:
We know that the two materials are both made up of copper. Since we know the mass and volume of the first one, let us solve for the density. Using the density of the first one, we can determine the mass of the second one by the given volume.
Density is an intrinsic property of matter. It has the same value for every given substance.
It is expressed as mass per volume of a substance;
Density = [tex]\frac{mass}{volume}[/tex]
Input the parameters and solve;
Density = [tex]\frac{890}{100}[/tex] = 8.9g/cm³
Now to find the mass of the 13cm³ copper;
Mass = density x volume
Mass = 8.9 x 13 = 115.7g
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.
When you ride your bike around a corner at 10 m/s, you are accelerating?
When you ride your bike around a corner at 10 m/s, you are accelerating. Acceleration is caused by any forces. Sliding friction keeps you in the seat when a car goes around a corner. If you throw a ball into the air, Earth exerts a force on the ball.
Answer:
yes because acceleration is a vector quantity and as u turn around a corner you are changing direction.
Explanation:
Which of the following is not a property of electromagnetic waves?
Answer: It does not include alpha rays
Explanation: It does not include alpha rays
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
are unicorns real or not
Answer:
no lol
Explanation:
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
what do waves create
Answer:
Waves transmit energy, not water, and are commonly caused by the wind as it blows across the ocean, lakes, and rivers. Waves caused by the gravitational pull of the moon and the sun are called tides.
Explanation:
Answer:
Waves are created by energy passing through water, causing it to move in a circular motion. However, water does not actually travel in waves. Waves transmit energy, not water, across the ocean and if not obstructed by anything, they have the potential to travel across an entire ocean basin. Waves are most commonly caused by wind. I hope this helped!
If you fire a gun horizontally, and at the same time drop a bullet/slug from the same height, what will happen?
Answer:
There you have it. The y-component of air resistance for the fired bullet still depends on the fired speed of the bullet (since it is proportional to v2). A fired bullet (with air resistance) does not hit the ground at the same time as a dropped bullet.
Explanation:
hope this helped ✨
A hiker walks 11 km due north from camp and then turns and walks 11 km due east. What is the magnitude of the displacement (on a straight line) of the hiker from the camp?
Answer:
16 km
Explanation:
Drawing a right triangle to model the problem helps. I started by drawing the lines of the triangle to model the hiker's journey- a vertical straight line for 11 km north and then a horizontal line connected to the top of it for 11 km east; I then drew the hypothenuse to connect the two lines.
The hypothenuse is what we have to solve for, so we will use the Pythagorean Theorem, a^2 + b^2 = c^2. Since both distances are 11 km both a and b in the equation are 11.
11^2 + 11^2 = c^2
121 + 121 = c^2
242 = c^2
c = 15.56
Rounding the answer makes it 16 km for the hiker's magnitude of displacement.
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
A ball is thrown upwards into the air with an initial velocity of
17.5 m/s. What is the maximum height that the ball traveled
during that time (assuming there is no air resistance). Round your
answer to two decimals places.
Answer:
y = 15.61 [m]
Explanation:
To solve this problem we must use the following kinematics equation. We must bear in mind that the acceleration of gravity is negative since the direction of gravity is opposite to the direction of motion.
[tex]v_{f} ^{2} = v_{i} ^{2} -(2*g*y)[/tex]
where:
Vf = final velocity = 0
Vi = initial velocity = 17.5 [m/s]
g = gravity acceleration = 9.81 [m/s^2]
y = height [m]
The final speed is zero, since the ball reaches the maximum height its speed will be zero since it cannot be lifted up more.
0 = (17.5)^2 - (2*9.81*y)
306.25 = 2*9.81*y
y = 15.61 [m]
Select the correct words from the drop-down menus to complete the sentence.
The
v work of a machine can never exceed the
work because
some of the work.
uses
Answer:
1. C
2. B
3. B
Explanation:
Took assignment on edge
The
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.
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
Where is mercury naturally found?
wellll that would be in earth crust
Answer:
in space
Explanation:
its a planet
Ignoring air resistance, if a 20 kg ball and a 400 kg crate were both dropped from the
top of a building, the acceleration of the crate would be
the acceleration
of the ball.
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
a car with a mass of 1,100 kg is moving down the highway with an applied force (force of the engine) of 2,450 N and a friction force of 825 N. What is the cars acceleration
Explanation:
2.23 m/s^2 squared yung 2
Two positively charged particles are 0.03 m apart. The first particle has a
charge of 8.1 C, and the second a charge of 2.6 C. Which change would
increase the electric force between the two particles?
Answer:1.3 103 N
Explanation:hope this helps.
Increasing the charge on each particle by 2.0C would increase the electric force between the two particles. Therefore, option (B) is correct.
What is coulomb's law?According to Coulomb’s law, the force between two charged point charges is the product of the magnitude of their charges and is inversely proportional to the square of the distance between the point charges. This force usually acts along the line which is joining the two charges.
The magnitude of the electric force can be expressed mathematically:
[tex]F = k\frac{q_1q_2}{r^2}[/tex]
where k is constant and has a value of 8.99 × 10⁹ N.m²/C².
We have given the two-point charges 8.1 C and 2.6 C. The distance between them is equal to 0.03 m. From the above-written formula, we can say that the charge on the particles is directly proportional to the electric force, and the distance between the charged particles is inversely proportional to the electric force.
Therefore, increasing the charge on each particle by 2.0 C would increase the electric force between the two particles.
Learn more about Coulomb's law, here:
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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
3. How many elements are found naturally on the Farth? *
Answer:
Fir wat glasss
Explanation:
Caitlin is riding her bike. Which of the following statements tells what is happening?
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
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.
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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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
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.
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