Explanation:
An object which moves 10 km in 30 minutes .
we have to find the average speed of the object .
Changing unit of time into hour
Time = 30/60 hour
Time = 1/2 hour
Time = 0.5 hour
Now let's calculate the average speed
[tex] \rm\bf \: Average \: speed \: = \frac{Total \: distance}{Total \: time \: } [/tex]
Put the value we get
[tex] \dashrightarrow \sf \: Average \: speed \: = \frac{10}{0.5} \\ \\ \dashrightarrow \sf \: Average \: speed \: = \frac{100}{5} \\ \\ \dashrightarrow \sf \: Average \: speed \: = \cancel \frac{100}{5} \\ \\ \dashrightarrow \sf \: Average \: speed \: =20km {hr}^{ - 1} [/tex]
So, the average speed is 20km/hr
A 5 kg object has a kinetic energy of 250 J. The speed of the object is rearrange the formula KE=v^ ^ 2^ * m/2 to solve for v
[tex] \qquad\leadsto\sf{10ms^{-1}}[/tex]
Correct Question :A 5kg object has a kinetic energy of 250J. Find the speed of the object by rearranging the formula :[tex]\sf{ KE=v^2\dfrac{m}{2}}[/tex]
Solution:Kinetic energy of an object is the energy possessed by the virtue of its motion.
Kinetic energy is given by:
[tex] \quad\hookrightarrow\quad{\pmb{ \sf {KE=\dfrac{mv^2}{2} }}}[/tex]
Here, we are given that:
Mass of body is 5kgIt's kinetic energy is 250 JBy using the given formula:
[tex] \implies\quad \sf{ KE =\dfrac{mv^2}{2}}[/tex]
[tex] \implies\quad \sf{ 250 = \dfrac{5\times v^2}{2}}[/tex]
[tex] \implies\quad \sf{\dfrac{ 5}{2}\times v^2 = 250}[/tex]
[tex] \implies\quad \sf{ v^2 =250\times \dfrac{2}{5}}[/tex]
[tex] \implies\quad \sf{v^2 =\cancel{ \dfrac{500}{5}} }[/tex]
[tex] \implies\quad \sf{v^2 = 100 }[/tex]
[tex] \implies\quad \sf{ v =\sqrt{100}}[/tex]
[tex] \implies\quad \sf{v =\sqrt{10\times 10} }[/tex]
[tex] \implies\quad\underline{\underline{\pmb{ \sf{ v = 10\:ms^{-1}}}}}[/tex]
physics behind cricket bat
Cricket bat uses one common law of physics
The law of conservation of linear momentumWhen a ball hits the bat with some velocity ,the cricket bat should hit with some more velocity to get greater impact velocity to move the ball somewhere .
Two cars are involved in a crash (no one was hurt in the accident). If
the total momentum is 4120 kg. M/s after the collision, what is the
total momentum before the collision?
A. 0 kg • m/s
B. 8240 kg • m/s
C. 2060 kg • m/s
D. 4120 kg • m/s
Give ten (10) words related to health on the grid. Write your answer on
a separate sheet.
Answer:
Answer
Explanation:
Answer:
1. Fitness 6. Health
2. Medicine 7. Diet
3. Diseases 8. Treatment
4. Exercises 9. Activities
5. Nutrition 10. Workouts
Harry is reading an online summary of the law of reflection. The site states that after light hits a mirror, the angle of reflection is the angle between the reflected ray and the normal, which is the surface of the mirror. Which statement corrects an error on the site? The normal is a line perpendicular to the surface of the mirror. The normal is a line perpendicular to the incoming ray. The angle of reflection is the angle between the incoming ray and the normal. The angle of reflection is the angle between the reflected ray and the incoming ray.
'The normal is a line perpendicular to the surface of the mirror'.This is the correct statement that corrects an error on the site.
What is the law of reflection?The law of reflection specifies that upon reflection from a downy surface, the slope of the reflected ray is similar to the slope of the incident ray.
The reflected ray is consistently in the plane determined by the incident ray and perpendicular to the surface at the point of reference of the incident ray.
When the light rays descend on the smooth surface, the angle of reflection is similar to the angle of incidence, also the incident ray, the reflected ray, and the normal to the surface all lie in a similar plane.
Hence 'The normal is a line perpendicular to the surface of the mirror'.This is the correct statement that corrects an error on the site
To learn more about the law of reflection refer to the link;
https://brainly.com/question/12029226
Calculate the weight of a book if it has a mass of 0. 6kg
Answer:
a) given that mass=0.6kg,distance of stretching from equilibrium position x=0.9m from new ton's second law,F=ma where a is acceleration of the body.Therefore,force on the spring -mass syste
Explanation:
hope it helps
True or False. Wegener proposed continental drift where the continents that were once separate drifted together to form Pangaea.
Answer:
False
Explanation:
he proposed that Pangea drifted apart int what is now the continents
pleaase mark brainliest
The magnitude of the electrostatic force between two point charges is f. If the distance between the charges is doubled, the electrostatic force between the charges will become.
When the distance between the charges is doubled, the electrostatic force between the charges will reduce by quarter.
Electrostatic force between two point charges
The electrostatic force between two point charges is calculated using Coulomb's law;
[tex]F = \frac{kq^2}{r^2}[/tex]
where;
F is the forcek is Coulomb's constantq is the charger is the distanceWhen the distance between the charges is doubled
[tex]F = \frac{kq^2}{(2r)^2} \\\\F = \frac{kq^2}{4r^2}\\\\F = \frac{1}{4} (\frac{kq^2}{r^2} )[/tex]
Thus, when the distance between the charges is doubled, the electrostatic force between the charges will reduce by quarter.
Learn more about electrostatic force here: https://brainly.com/question/17692887
Liquid water cannot exist for very long on the surface of mars today because.
Answer:
mars is to hot
Explanation:
The diagram shows a circuit with a 3-cell battery, a light bulb, and four labeled locations. Which statement describes the direction of conventional current in this circuit?
The statement that correctly describes the direction of conventional current in the circuit is : ( C ) current is directed from A to B to C to D
Conventional currentconventioanl current is simply the flow of protons from the positive terminal of the voltage source ( battery ) to the negative terminal of the battery. Also conventional current is the charge transferred in a given direction per unit time. for a conventional current the charge carrier is irrelevant.
Hence we can conclude that the direction of conventional current in the circuit is : current is directed from A to B to C to D.
Learn more about conventional current : https://brainly.com/question/15078212
Attached below is the missing part of the question
A metal of mass 25g and dropped into a calorimeter 200g of water initially at 20°C. The final temperature is 22°C. Compute the specific heat of the metal if the water equivalent of calorimeter is 10g.
#Help Me!!
Key words
m=massT=temperaturec=Specific heat capacity[tex]\\ \rm\hookrightarrow Q_{initial}=Q_{Final}[/tex]
[tex]\\ \rm\hookrightarrow m1c1\Delta T=m2c2\Delta T[/tex]
Clear ou ∆T[tex]\\ \rm\hookrightarrow 25c1=(200+10)(1)[/tex]
[tex]\\ \rm\hookrightarrow 25c1=210[/tex]
[tex]\\ \rm\hookrightarrow C1=210/25[/tex]
[tex]\\ \rm\hookrightarrow C1=8.4cal/g°C[/tex]
The correct answer is 8.4 J⋅kg−1⋅K−1
Explanation :
The mass of the metal and water are given.The initial temperature and final temperature are given.We need to calculate the Specific heat of metal .
We know that
Qi = Qf
Therefore ,m1c1 ΔT = m2c2ΔT
Where m1 is 25g and m2 is 200g
so , 25c1 = (200+10)(22-2)
25c1 = 420
Therefore , c1 = 210/25
c1 = 16.8J⋅kg−1⋅K−1
Hence the specific heat of metal is 16.8 J⋅kg−1⋅K−1
Learn more about Specific heat at
https://brainly.in/question/1141811
#SPJ2
You buy a cup of coffee at a local coffee shop. It comes in a paper cup. The cup is too hot to hold and you let it sit on the counter for a while. Eventually the cup is cool enough to carry.
Which choice describes how heat energy transfer is related to thermal energy loss?
Answer:
Thermal energy from the cup was lost as heat to the environment thus reducing the temperature of the cup
Explanation:
Answer: Thermal energy from the cup was lost as heat to the environment thus reducing the temperature of the cup
Explanation: did workbook and got answer right
What would land with more force, a feather moving at a certain acceleration, or a football moving with the same acceleration?
Answer:
the ball ofc
Explanation:
the ball have a greater mass then the feather and it have the same speed as the feather
A 60 watt light bulb runs for 5 seconds. How much energy does
it use?
The work done when raising an object must result in an increase in the object's.
Answer:weight
Explanation: weight + mass = acceleration
Determine the resultant moment of the forces acting about the x, y, and z axes. Suppose that f1 = 200 n, f2 = 60 n, f3 = 115 n, and f4 = 300 n. (figure 1).
Based on the forces acting on the axes, the resultant moments will be (345, 400, 600 N·m)
What would be resultant moment about x-axis?= F₃ x 3
= -115 x 3
= -345 N·m
What would be resultant moment about y-axis?= F₁ x 2
= -200 x 2
= -400 N·m
What would be the resultant moment about z-axis?= F₄ x 2
= -300 x 2
= - 600 N·m
In conclusion, the resultant moment about x, y, and z axes is (345, 400, 600 N·m)
Find out more on resultant moments at https://brainly.com/question/6278006.
how is this possible
Answer: I'm sorry what's wrong with your money
Explanation:
Answer: LOL YO I HAVE 5K IN GROUP FUNDS
Explanation:
In the context of studying major bodies of our solar system, what category of object does our moon best fit?.
The simplest, obvious category is " Satellites " .
But there's a lot of good reason to call it "Component of Binary Planet" .
As a fraction of the size and mass of its planet, our moon is the largest in the solar system.
Several writers have pointed out that an alien astronomer studying our solar system might describe the 3rd body from the Sun as a "Binary planet".
If the body temperature of a person is recorded as 98. 6°F, what is the person’s body temperature in °C? 37 99 209.
Answer:
37
Explanation:
Fahrenheit = ( 9 divided by 5 x Celsius) + 32
= ( 9 divided by 5 x 5)
= 5 + 32
= 37 degrees Celsius
Answer:
37 °
Explanation:
4. A lamp in a circuit has 4 Amps of current. If there is 32 12 of resistance
in the lamp, what is the voltage?
Answer:
your mum because I don't know how to explain why she was doing it but I think I have to do it myself again but it was just the way
at what time would the object reach a speed of 45 km/ hr? and what is the objects acceleration
soapy water between surfaces
A. increases friction.
B. produces heat
C. reduces friction.
D. speeds up wearing out
Answer:
C. reduces friction
Explanation:
Soapy water between surfaces reduces friction.
If I am lifting a box with a force of 100 N and the box has an acceleration of 10 N, what is the mass of the box?
Answer:
a. How much force is required to lift a box of weight 100 N upwards with a constant acceleration of 6.0 m/s2?
b. How much upwards force is required to lower the same box with a downward acceleration of 3.0 m/s2?
a. As the box weighs 100 N, its mass is 100 N / 9.8 ms-2 = 10.2 kg. To have an upward acceleration of 6.0 m/s2, there must be a net upward force of F =ma = 10.2 kg x 6.0 m/s2 = 61.2 N. The total upward force must be equal have a magnitude to overcome the downward force of gravity and to provide for the upward acceleration Ftotal up = 100 N + 61.2 N = 161.2 N.
b. There must be a net downward force F = ma = 10.2 kg x 3.0 m/s2 = 30.6 N upward. There must be an upward force to counteract the downward force of gravity so that the resultant will be 30.6 N. The equation necessary for this is 100 N - upward force = 30.6 N. Solving for the upward force gives 69.4 N.
Explanation:
Plastic soda bottles are hooked up to a launcher. The launcher uses the water pressure to propel the rocket upward. What combination yields greatest height? A) A full 2-liter bottle B) A full 1-liter bottle. C) A three-quarter full 1-liter bottle D) A three-quarter full 2-liter bottle.
Answer:
The plastic soda bottles should be
D) A three-quarter full 2-liter bottleThe bottle with the greater volume will create more pressure but that pressure is delivered through the gas that is in the space in the bottle that is why the bottle should not be completely full.
Explanation:
Answer:
D
Explanation:
I took the test.
Common places Soil pollution occur?
Answer:
industrial sites, landfills and junkyards
Explanation:
Lot of toxic waste are generated here
When Harley-Davidson adapted some of its motorcycles with features such as smaller hand grips, lower seats, and an easier-to-pull clutch lever, it was attempting to _______.
Which nuclear reaction occurs in stars?
Answer:
In a nuclear fusion reaction, the nuclei of two atoms combine to create a new atom. Most commonly, in the core of a star, two hydrogen atoms fuse to become a helium atom.
A car resting on a paved surface exerts a pressure (p) over an area of tire contact 1.28m^2. If the massif the car is 1.2x10^3Kg and the gravity is 9.8 N/Kg, then the pressure (P) is approximately equal to:
A. 2.36 x 10^5
B. 9.19 x 10^4
C. 9.19x10^3
D. 3.83 x 10^4
When the radius increases the centripetal acceleration will.
I don't know the answer it is too much hard for me
How much force is needed to accelerate a dirt bike 15 m/s2 if the bike and rider has a mass of 65 kg?
Answer:
975 N
Explanation:
Force = acceleration • mass
Force = 15 m/s/s • 65kg
Force = 975 N
