Answer: : it is so because velocity and speed differ each other by direction. in a 100 m sprint race ,the person moves in a straight path without changing its direction where as in a 400 m race , the person moves in a lap around the race track and the direction changes as he turns according to the race track.
Explanation:
Two objects of mass 5 kg and 8 kg at rest F1 and F2 meters force applied on both the boxes respectively If the speed of both the objects after 5 sec become 16m/s and 15m/s respectively find the value of F1 and F2?
Answer:
F1 = 16 N and F2 = 24 N
Explanation:
Formula used => F = m×a and v-u= at
So, as we know force = mass × acc.
so acc. of first block = <math> F1/5 </math>. and acc. of second block = <math> F2/ 8 </math>.......... so as v-u= at.. now
Here u= 0 as the objects are placed at rest initially..
thus, v= at
FOR 1ST BLOCK
16= <math> F1/5 </math> × 5 ==> F1 = 16 N
FOR 2ND BLOCK
15= <math> F2/ 8 </math> × 5 ==> F2= 24 N
A bullet of mass 0.05kg has a speed 400.what is it's kinetic energy.
if the bullet hits a wall of which the average resistive force is 10000 newton.calculate the distance penetrated by the bullet.
Answer:
K.E =1÷2M×V^2
= 1÷2×0.05×(400)^2
= 4000
Explanation:
what causes lightning?
Answer:
cause by imbalances between stroms cloud and grounds , or within the cloud themselves.
Explanation:
Lightning is an electrical discharge caused by imbalances between storm clouds and the ground, or within the clouds themselves. Most lightning occurs within the clouds. ... This heat causes surrounding air to rapidly expand and vibrate, which creates the pealing thunder we hear a short time after seeing a lightning flash.
The positive and negative charges grow large enough, a giant spark lightning, occurs between the two charges within the cloud.
What is lightning?The naturally occurring electrostatic discharge with high voltage for short duration from the cloud to the ground or within the cloud. The lightning can be seen by a flash of light that could be followed by the strong sound. Lightning happens when the negative charges (electrons) in the bottom of the cloud are attracted to the positive charges (protons) in the ground or within the clouds. In the starting stages air acts as an insulator, but after the charges build up with the charges in the ground and cloud there will be the rapid form of electricity causes lightning. These lightning were in the color of bluish white.
Thus, the charges discharging naturally causes lightning.
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PLEASE HELP
A 0.200 plastic ball moves with a velocity of 0.30 m/s . It collides with a second plastic ball of mass 0.1200 K B , which is moving along the same line at a speed of 0.10 m/s * A * f * t * e * r the collision , both balls continue in the same direction and the speed of the 0.1200 K B ball is 0.26 m/s . What is velocity of the first ball after the collision?
Answer:
29 m/s.
Explanation:
Hope this helps.
How does electricity flow through a conductor?
Answer:
Electricity works by getting a bunch of conductor elements together and creating a flow of electron-stealing patterns through them. This flow is called a current. Conductors need to be surrounded with insulators so the electrons can only go in one direction.
Explanation:
Un parașutist are, împreună cu parașuta, o masă de 110 kg. Atunci când parașuta este deschisă, el are o mișcare rectilinie și uniformă. b) Calculează forța de rezistență a aerului în situația descrisă.
Answer:
The calculation and explanation is given below:
Explanation:
a) Here the forces represent that there are parachutist weight and the parachute G also the force of air resistance.
b) As the displacement would be made in HRM so the weight and Air resistance force would be equivalent in the opposite way
G = mg
= 110 × 10
= 1100N
Fr = 1100N
(a) If a person can jump a maximum horizontal distance (by using a 45° projection angle) of 3.0 m on Earth, what would be his maximum range on the Moon, where the free-fall acceleration is g/6 and g 5 9.80 m/s2 ? (b) Repeat for Mars, where the acceleration due to gravity is 0.38g.
Answer:
See explanation
Explanation:
Range of a projectile is given by; U^2sin2θ/g
When θ = 45°
The maximum range is obtained as;
Rmax = U^2/g
Maximum range on earth = RME = U^2/g
Maximum range in the moon= RMM =U^2/g/6
Maximum range in Mars = RMMA = U^2/0.38g
a)
RME/RMM = U^2/g/U^2/g/6
RME/RMM = 6
But RME = 3 m
RMM = 3 * 6 = 18 m
b)
RME/RMMA =U^2/g/U^2/0.38g
RME/RMMA = 1/0.38
But RME = 3 m
RMMA = 3/0.38
RMMA = 7.9 m
Can someone explain to me what omega(ω) represents and what theta(θ) represents when it comes to angular motion?
Answer:
the twenty-fourth, and last, letter of the Greek alphabet (Ω, ω), transliterated as ‘o’ or ‘ō.’.
Explanation:
A flat screen TV uses 120 Watts. How much energy is used up if it is left on for 15 minutes? Question 25 options: 4 J 15 J 0.67 J 108,000 J
Answer:
Option d (108,000 J) is the correct answer.
Explanation:
The given values are:
Power,
P = 120 Watts
Time,
t = 15 min.
i.e.,
= 900 sec
As we know,
⇒ [tex]P=\frac{W}{t}[/tex]
So,
⇒ [tex]W=P\times t[/tex]
On substituting the given values, we get
⇒ [tex]=120\times 900[/tex]
⇒ [tex]=108,000 \ J[/tex]
Which statement describes the relationship between bond strength and the melting and boiling points of a substance?
A. As the force between the particles increases, the melting point increases and the boiling point decreases
B. As the force between the particles increases, the melting point decreases and the boiling point increases
C. As the force between the particles increases, the melting and boiling points decrease.
D. As the force between the particles increases, the melting and boiling points also increase.
Answer:
D
Explanation:
The relationship between bond strength and the melting and boiling points can be explained as the force between the particles increases, and the melting and boiling points also increase.Therefore the correct option is D.
What is the boiling point?It is a temperature at which the pressure exerted by the external atmosphere is equal to the vapor pressure of the substance.
The boiling point depends on atmospheric pressure, temperature, bond strength, and vapor pressure of the liquid.
The bond strength between different atoms of the substance greatly influences the boiling point and melting point.
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A rocket is fired at 60 to the horizontal with an initial speed of 200m5 calculate it time of flight and it range on the horizontal plane
Answer:
See answer below
Explanation:
In order to do this, we just need to apply the expression to determine the time of flight. This is given by:
t = 2 V₀ Sinθ / g (1)
We have the initial speed which is 200 m/s, the angle of elevation to the horizontalis 60° and the gravity is 9.8 m/s². Replacing this data in the above expression we have:
t = 2 * 200 Sin60° / 9.8
t = 35.348 sNow that we have the time, we can determine the range or distance in the horizontal plane. This can be calculated using the following expression:
X = V * t (2)
We already have the time, which is the time of flight, the initial speed using cos 60° (Cause it's horizontal plane), and replacing we have:
X = 200 cos60° * 35.348
X = 100 * 35.348
X = 3534.8 mHope this helps
A jet plane flying 600 m/s experiences an acceleration of 4g when pulling out of the dive. What is the radius of curvature of the loop in which the plane is flying?
Answer:
The radius of the curve is 9,183.67 m.
Explanation:
Given;
velocity of the jet plane, v = 600 m/s
acceleration of the jet plane, a = 4g = 4 x 9.8 m/s² = 39.2 m/s²
The radius of the curve is calculated from centripetal acceleration formula as given below;
[tex]a = \frac{v^2}{r} \\\\r = \frac{v^2}{a} \\\\r = \frac{600^2}{39.2} \\\\r = 9,183.67 \ m[/tex]
Therefore, the radius of the curve is 9,183.67 m.
The simple act of walking requires single leg
full body
and
a strong
and
full body
you are so wise how do you do it?
You are so excited that you have finished this test that you give your friend a huge high five with 20N of force.
With how much force does your friend's hand high five you back?
Answer:
20N
Explanation:
newtons 3rd law every action has an equal opposite reaction
I'm not too sure
1. How far does a 70 kg object move in meters (m) if it
accelerates at 13 m/s2 and 50 joules of work is done?
Answer:
Units of work would be equivalent to a Newton times a meter. ... An individual force does NOT do positive work upon an object if the object is moving at ... FALSE - Watt is the standard metric unit of power; Joule is the standard metric unit of energy. ... TRUE - A kg•m2/s2 is a mass unit times a speed squared unit, making it a ...
What are isotopes.
Please answer soon
each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.
3.
Where is the weight of an object more on earth, Equator or poles? Why?
Answer:
The weight of an object at the poles is more than the weight of the object at the equator
Explanation:
The shape of the Earth is an ellipsoid such that the distance from the North and South poles to the Earth's center, R₁, is less than the distance from the Equator to the center of the Earth, R₂
The weight of an object is given by the universal gravitational law as follows;
[tex]Weight = F_{gravity} =G\times \dfrac{M \cdot m}{R^{2}}[/tex]
Where;
[tex]F_{gravity}[/tex] = The force of gravity = The weight of an object
G = The universal gravitational constant
M = The mass of the Earth
m = The mass of the object
R = The radius of the Earth
Where R₁ < R₂, we have;
The weight at the Poles, W₁ = [tex]G\times \dfrac{M \cdot m}{R_1^{2}}[/tex]
The weight at the Equator, W₂ = [tex]G\times \dfrac{M \cdot m}{R_2^{2}}[/tex]
We have;
[tex]\left(G\times \dfrac{M \cdot m}{R_1^{2}} \right) > \left(G\times \dfrac{M \cdot m}{R_2^{2}} \right) \because R_1 < R_2[/tex]
Therefore, the weight of an object at the poles, W₁, is more than the weight of the object at the equator, W₂
A man started at his house and went to the post office, then to the pet store, and finally home again. What is the average velocity if this trip took three hours?
Explain how you arrived at your answer.
Answer:
0
Explanation:
Defining velocity :
Velocity is a vector which is the ratio of a person's total displacement with time.
Displacement, in simple terms refers to the distance between an individual's initial position to his final position.
Man's initial position = House
After all his navigation and points covered irrespective of the distance ;
Final position = House
Hence, we can conclude that the man's Displacement is ;
Final position - Initial position = 0
Hence,
Velocity = Displacement / time taken
Velocity = 0 / 3
Velocity = 0
how does the angle of incidence compare with the angle of reflection?
Answer:
The angle of incidence is the angle between this normal and the incident ray; the angle of reflection is the angle between this normal and the reflected ray. According to the law of reflection, the angle of incidence equals the angle of reflection.
Explanation:
:)
Answer:
hope my answer helps
Explanation:
second law of reflection states that the angle of incidence equals to the angle of reflection,
this is the basic relationship,
so the angle of incidence is also equals to angle of reflection
hope this helps, if not please report it so that someone else gets to try it out
please mark it brainliest
An airplane traveling at 201 m/s makes a turn. What is the smallest radius of the circular path (in km) that the pilot can make and keep the centripetal acceleration under 5.0 m/s2 ?
Answer:
the smallest radius of the circular path is 8.1 km
Explanation:
The computation of the smallest radius of the circular path is given below:
Given that
V = Velocity = 201 m/s
a_c = acceleration = 5 m/s^2
radius = ?
As we know that
a_c = V^2 ÷ r
5 = 201^2 ÷ r
r = 201^2 ÷ 5
= 8,080.2 g
= 8.1 km
Hence, the smallest radius of the circular path is 8.1 km
During heavy exercise, muscle cells use oxygen more quickly than normal. Which system responds by carrying extra oxygen to these muscle cells?
a. digestive b. circulatory c. nervous
d. immune
Answer:
The answer is B. Circulatory
Matthew throws a ball straight up into the air. It rises for a period of time and then begins to drop. At which points in the ball’s journey will gravity be the greatest force acting on the ball?
Answer:
When the ball falls down.
What role does math play in physics?
Answer:
To provide mathematical models for describing physical reality.
[They are both the same passage]
What was Deborah Ashcraft’s motivation for organizing the Canstruction project in 1992? Use at least 2 details from the article to support your answer.
Answer:
jejeje
Explanation:
jejejejejee
How does sound travel? *
Air molecules move in a straight line in one direction.
Air molecules move in waves that sometimes bounce back.
Air molecules move in waves in one direction.
None of the above.
Answer: 2 i think
Explanation:
Answer:Im pretty sure its the second one because sound sometimes bounces back and that causes echo and it doesnt travel in one line or direction
Explanation:
HELPPP ILL GIVE YOU BRAINLIST
which example below best illustrates electrical energy being converted into radiant energy?
A ) Fusing hydrogen nuclei in the sun
B ) Igniting fireworks
C ) lighting an Bunsen burner with a flint striker
D ) Turing on a light bulb
Answer:
Turning on a light bulb.
PLEASE IM TIMED! GIVE BRAINLIEST OF U ANSWER THESE 2 QUESTION!!
Answer:
thermaltrueExplanation:
hope this helps!
thermal,true the explanation is because the other guy said so
Which two options describe physical properties of matter?
A. Whether a substance floats or sinks in water
B. Whether a substance tarnishes
C. The ability of a substance to combine with other substances
D. The temperature at which a substance boils
E. Whether a substance can be burned
Answer:
A. (Buoyancy) and D. (Temperature)
Explanation:
I took itttttttttttttttt
The physical properties of matter are A and D.
What are the properties of matter?
Those who have mass and occupy space are called matter.those are residences together with mass, weight, quantity, and density. Density calculations can be mentioned in a while in chapter 3, however for now just remember the fact that density is a physical property. physical houses that do not depend on the amount of substance present are called extensive residences.
Among the following the properties of matter are:-
A. Whether a substance floats or sinks in water.
D. The temperature at which a substance boils.
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how is electromagnets magnetic field is controlled by a switch
Answer:
They affect by switch by the conductors
Explanation:
sana makatulong
PLS HELP! I WILL GIVE BRAINLIEST TO BEST/ CORRECET ANSWER! 15 POINTS PER PERSON! PLS HELP!
Logan lists the causes of floods in Florida.
Which cause does not belong in the list?
A. big storms
B. inadequate drainage system
C. mild storms
D. rip currents
BTW: The fact that I selected an answer in the picture does not matter. Thank you!
Answer:
c might be right
Explanation:
c doesn't make any sense. big storms mean more water for flooding, inadequate drainage system means the water can't leave certain areas, I'm not sure what rip currents are tho
Answer:
rip currents
I live in florida, and we don't have mild storms either its big one or none :)
Explanation:
and can you help me please, its 30 points
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^^ there the same question but the first website i misspelt it but its 30 points and the 2nd website is the question written out right but its 5 point but there the same thing you need to do, you can put the same thing for both and get extra point idc, i just need help lease