c
Explanation: c because you said it lol
Answer:
c
Explanation:
Radar tells an air traffic controller that a jet is slowing as it nears the
airport. Which might represent the jet's velocity?
A. 700 h/km
B. 700 km
C. 700 km/hr
D. 700 km/h west
Choice-D is the only velocity on the list.
(It has a speed and a direction.)
The jet's velocity might be represented by 700 km/h west. Hence, option (D) is correct.
What is velocity?The rate at which a body's displacement changes in relation to time is known as its velocity. Velocity is a vector quantity with both magnitude and direction. SI unit of velocity is meter/second.
In this question, 700 h/km, 700 km have different unit that of velocity. So, option (A) and option (B) is not correct. . 700 km/hr has same unit that of velocity. But it does not has direction. So, option (C) is also incorrect. 700 km/h west has the same unit of velocity with define direction. So, option (D) is correct.
Hence option (D) is correct answer.
Learn more about velocity here:
https://brainly.com/question/18084516
#SPJ6
When you serve, you must serve by hitting
below the chest level
above the chest level
you can serve any way you want
(This is gym)
The common version of Newton’s second law of motion, EF= ma, is actually a special case that is true only when an objects _____ is constant.
-Mass
-Momentum
-Force
-Velocity
Answer:
A
Explanation:
only is true when the objects mass is constant
Answer:
A.
Explanation:
When the mass is constant. Newton's second law will work perfectly.
Fun fact you probably won't need to know this, but the original formula that Newton derived was F=change in momentum divided by change in time. Momentum will account for a change in mass. The schooling system lies to you all the time especially in physics.
In the figure shown, if angle i increases slightly, angler will
angle of
reflection
angle of
incidence
a. remain the same
Oc. increase
Ob disappear
O d. decrease
Answer:
Explanation:
According to law of reflection of light ,
angle of incidence = angle of reflection
angle of incidence = i
angle of reflection = r
when angle of incidence increases to i₁ and angle of reflection becomes r₁
According to law of reflection,
i₁ = r₁
i₁ - i = r₁ - r
increase in angle of incidence = increase in angle of reflection .
So angle of reflection also increases .
A 300.0 g sample of water at 80.0°C is mixed with 300.0 g of water at
10.0°C. Assuming no heat loss to the surroundings, what is the final
temperature of the mixture? The specific heat capacity of liquid water is
4180 J/kg.°C *
Will give brainliest and lot of stars please help
Answer:
T_finalmix = 45 [°C].
Explanation:
In order to solve this problem, a thermal balance must be performed, where the heat is transferred from water with the highest temperature, to the water with the lowest temperature, so the final temperature of the mix must be equal once the thermal balance is achieved.
[tex]Q_{water}=Q_{methanol}[/tex]
where:
[tex]Q_{water}=m_{water}*Cp_{water}*(T_{waterinitial}-T_{final})[/tex]
mwater = mass of the water = 300 [g] = 0.3 [kg]
Cp_water = specific heat of the water = 4180 [J/kg*°C]
T_waterinitial = initial temperature of the water = 80 [°C]
T_finalmix = final temperature of the mix [°C]
[tex]Q_{water}=m_{water}*Cp_{water}*(T_{final}-T_{water})[/tex]
Now replacing:
[tex]0.3*4180*(80-T_{final})=0.3*4180*(T_{final}-10)\\100320-1254*T_{final}=1254*T_{final}-12540\\112860=2508*T_{final}\\T_{final}=45[C][/tex]
The final temperature of the mixture is 45 °C
Data obtained from the question Mass of warm water (Mᵥᵥ) = 300 g = 300 / 1000 = 0.3 KgInitial Temperature of warm water (Tᵥᵥ) = 80 °C Mass of cold water (M꜀) = 300 g = 300 / 1000 = 0.3 KgInitial Temperature of cold water (T꜀) = 10 °C Specific heat capacity of water (C) = 4180 J/KgºC Equilibrium temperature (Tₑ) =? How to determine the equilibrium temperatureHeat lost by warm water = Heat gained by cold water
Qᵥᵥ = Q꜀
MᵥᵥC(Tᵥᵥ – Tₑ) = M꜀C(Tₑ – T꜀)
0.3 × 4180 × (80 – Tₑ) = 0.3 × 4180 × (Tₑ – 10)
1254 (80 – Tₑ) = 1254(Tₑ – 10)
Clear bracket
100320 – 1254Tₑ = 1254Tₑ – 12540
Collect like terms
100320 + 12540 = 1254Tₑ + 1254Tₑ
112860 = 2508Tₑ
Divide both side by 2508
Tₑ = 112860 / 2508
Tₑ = 45 °C
Thus, the final temperature of the mixture is 45 °C
Learn more about heat transfer:
https://brainly.com/question/6363778
Pls answer nowwwwwwwww
Answer:
1 or a the first bubble
Explanation:
help in science pleas in physical science
Answer:
liquid
Explanation:
hope this helps
( pls help me i worked hard for these points! i hope u will not write anything for the points pls help me! due is today)
Answer:
a) 500 m
b) 50 s
c) speed= distance/time= 500/50= 10 m/s
hope it helps! please mark me brainliest
thank you! have a good day ahead
if u follow me, I will follow u back!
Please help me
27. A 20 kg object is at rest. A 6 N force pulls to the right on
the object for 10 seconds.
A) Find the impulse on the object.
B) Find the final momentum of the object.
C) What is its final velocity?
Answer:
a. 60 N*s
b. 60 (kg*m)/s
c. 3 m/s
Explanation:
Givens:
m = 20 kg
v_i = 0 m/s
t = 10 s
F = 6 N
a) Impulse:
I = F*t
I = 6 N*10 s
I = 60 N*s
b) Momentum:
p = v*m
F = m(a)
a = F/m
a = 6 N/20 kg
a = 0.3m/s^2
a = (v_f -v_i)/t
v_f = (0.3 m/s^2)*10 s
v_f = 3.0 m/s
p = 3 m/s*20 kg
p = 60 (kg*m)/s
c. Final velocity
a = (v_f -v_i)/t
v_f = (0.3 m/s^2)*10 s
v_f = 3.0 m/s
The impulse, momentum and final velocity can all be obtained from Newton's second law.
Let us recall that the impulse is obtained as the product of force and time.
Impulse = Force × time
Impulse = 6 N × 10 s = 60 Ns
From Newton's second law of motion;
F.t = mv - mu
Since the object was initially at rest;
F.t = mv
Hence, the final velocity of the object is 60 Kgms-1
The final velocity is obtained from;
F.t = mv
v = F.t/m
v = 6 × 10/20
v = 3 m/s
Learn more about impulse and momentum: https://brainly.com/question/904448
goat gallops at -1.5m/s, how far will the goat travel in 20 seconds?
Please show work
Answer:
30m
Explanation:
Given parameters:
Speed of the goat = 1.5m/s
Time = 20s
Unknown:
Distance traveled = ?
Solution:
To solve this problem, we use;
Speed = [tex]\frac{distance}{time}[/tex]
Distance = Speed x time
So;
Distance = 1.5m/s x 20s = 30m
A hammer strikes a nail with a 10 N force for 0.01 s. Calculate the impulse of the hammer.
Answer:
if impulse is force times speed then itd be 10 time .01. so .1 n s is the answer i think
Explanation:
What is the main difference between speed and velocity
Answer:
Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object's movement.
Explanation:
Answer:
Speed refers to the distance taken at a specific time interval. Velocity is the speed in a certain direction.
Im so confused can someone help. I’ll give you BRAINLIETS
I found the answer sheet online for you
Which organism gets its energy directly from the Sun?
I’m NC the wind is blowing from the north. If the wind changes direction and begins to blow from the south, what will most likely result.
NC means North Carolina.
Answer:
The temperatures will increase.
Explanation:
What will happen is that the temperature will increase. This is because, in wind direction and weather forecasting, a wind that shifts from the south means that warmer air/temperatures are approaching whereas a wind shift from the north implies that cooler air/temperatures are approaching.
At a baseball game, a pitcher throws the ball at 41.01 m/s to the catcher at home plate. If the mass of the baseball is 0.1299 kg, what impulse is required to provide the baseball with that much momentum?
Answer:
5.327 N-s
Explanation:
uwu
A large semi-truck is moving a house from one lot to another. The amount of force required to move the house 15.A horizontally a distance of 72 meters is 3.500 pewtens How much work will be done ce the house?
Answer:
252J
Explanation:
Given parameters:
Distance = 72m
Force = 3.5N
Unknown:
Work done on the house = ?
Solution:
Work done is the force applied to move a body through a particular distance.
Work done = Force x distance
Now insert the parameters and solve;
Work done = 3.5 x 72 = 252J
which of the following are likely to be affected by a magnet?
Check all that apply
A) a DVD
B) A floppy disk
C) A compact disk
D) A credit card
Answer:ye
Explanation:
A 2 kg marble moving at 4 mi./s collides into a 1 kg marble at rest. After collision, the 2 kg marble speed decreased to 2 mi./s. Calculate the velocity and speed of the 1 kg marble immediately after colliding.
Please show work and please help me as fast as possible because this is time
Please help as soon as possible please
Please I’m begging
Answer:
[tex]2\sqrt{6}[/tex] [tex]\frac{mi}{s}[/tex]
Explanation:
Assuming there is no waste of energy:
[tex]K_{1} = K_{2}\\\frac{1}{2}m_{1}v_{1_{1}}^{2} + \frac{1}{2}m_{2}v_{2_{1}}^2 = \frac{1}{2}m_{1}v_{1_{2}}^{2} + \frac{1}{2}m_{2}v_{2_{2}}^2\\\\=> m_{1}v_{1_{1}}^{2} + m_{2}v_{2_{1}}^2 = m_{1}v_{1_{2}}^{2} + m_{2}v_{2_{2}}^2\\\\m_{1} = 2 kg, m_{2} = 1 kg, v_{1_{1}} = 4 \frac{mi}{s} , v_{2_{1}} = 0\\=> 32 = 8 + v_{2_{2}}^{2} => v_{2_{2}} = 2\sqrt{6} \frac{mi}{s}[/tex]
If circuit A has twice the resistance of circuit B. The voltage is the same in each circuit.which circuit has the higher current?
Answer:
circuit b will have the higher current than circuit a
A wagon, initially traveling at a constant 8.2 m/s, starts going down a hill that creates an acceleration of 9.0 m/s2. What is the wagon's velocity 6.6 s after it starts accelerating down the hill?
Answer:
67.6m/s
Explanation:
Given parameters:
Initial velocity = 8.2m/s
Acceleration = 9.0m/s²
Time = 6.6s
Unknown:
Final velocity = ?
Solution:
To solve this problem, we use the expression below:
Acceleration = [tex]\frac{v - u }{t}[/tex]
v is the final velocity
u is the initial velocity
t is the time taken
9 = [tex]\frac{v - 8.2}{6.6}[/tex]
v - 8.2 = 59.4
v = 59.4 + 8.2 = 67.6m/s
Indiana Jones is being chased over the rooftops of Marseilles by some random villain. He looks ahead and sees that there is a 7 meter gap between this rooftop, which is 25 meters above the ground, and the next, which is 19 meters above the ground. He gathers up all his strength and runs and leaps from the higher roof to the lower. How fast must he run so he doesn't go plummeting into the street below? *
5 points
Answer:
30 mph
Explanation:
What is the gravitational force of attraction between two asteroids in space, each with a mass of 50,000 kg, separated
by a distance of 3800 m?
Answer:
1.16 x 10⁻⁸N
Explanation:
Given parameters:
Mass of the two asteroids = 50000kg
Distance between the asteroids = 3800m
Unknown:
Gravitational force between the two asteroids = ?
Solution:
To solve this problem, we apply the newton's law of universal gravitation:
Fg = [tex]\frac{G mass 1 x mass 2}{r^{2} }[/tex]
G is the universal gravitation constant
r is the distance between them
So;
Fg = [tex]\frac{6.67 x 10^{-11} x 50000 x 50000}{3800^{2} }[/tex] = 1.16 x 10⁻⁸N
Ask Questions Action and reaction force pairs are all around you, but they aren't always obvious. Write down
a question about a situation in which you can't identify what force pairs are at work.
Answer:
Writing with a pencil. The pencil pushes on the paper. The paper pushes on the pencil.
Explanation:
Newton's third law.
Water has a heat of fusion of 6.01 kJ/mol. An iceberg in the Atlantic Ocean near Newfoundland contains 1.27 x 107 mol of water. How much thermal energy does it absorb as it melts? Answer using appropriate significant digits. Please record your work in your notes for future reference.
Answer:
7.63×10⁷ kJ
Explanation:
From the question given above, the following data were obtained:
Heat of fusion (Hբ) = 6.01 kJ/mol
Number of mole of water (n) = 1.27×10⁷ moles
Heat (Q) absorbed =?
The thermal energy absorbed can be obtained as follow:
Q = n•Hբ
Q = 1.27×10⁷ × 6.01
Q = 7.63×10⁷ kJ
Thus, 7.63×10⁷ kJ of thermal energy is absorbed.
Extra (1): A hair dryer bears the inscriptions(220V-1500W)
a. What do these inscriptions mean?
b. What current would it carry in normal functioning?
Answer:
See the answers below.
Explanation:
a)
The dryer plate indicates that the estimated power is 1500 [W] and operates connected to the mains with an electrical voltage of 220 [V]
b)
The electrical current is determined by the following expression:
[tex]P=V*I[/tex]
where:
V = voltage = 220 [V]
I = current [amp]
P = power [W]
[tex]1500=220*I\\I=6.81[amp][/tex]
2342-24521+2453x=1342
Answer:
9.59
Explanation:
Given expression:
2342 - 24521 + 2453x = 1342
Now,
add similar terms on both sides of the expression:
-22179 + 2453x = 1342
So;
Collect like terms;
2453x = 1342 + 22179
2453x = 23521
Now, divide both sides by 2453;
x = 9.59
A rectangle box was measured with a length of 4cm, width 2cm, and height 2cm. What is the volume of the box?
Answer:
volume is 64
Explanation:
2×2×4×4
=64
Answer:
[tex]V = 16\ cm^3[/tex]
Explanation:
The Volume of a Rectangular Prism
A rectangular prism is also called a rectangular box and has three dimensions all perpendicular to each other.
Given a rectangular prism of length L, width W, and height H, the volume is calculated as:
V = WLH
We are given the dimensions of a rectangular box: L= 4 cm, W = 2 cm, H = 2 cm. Computing the volume:
V = 2 cm * 4 cm * 2 cm
[tex]\mathbf{V = 16\ cm^3}[/tex]
its urgent plssss help me :(
Answer:
(4) The particle travels with a constant velocity until t0 and then comes to rest.
Explanation:
Uniform rectilinear motion is defined as the motion of a particle in a straight line with constant velocity, that is, there is no change in velocity over time.
And this can be determined by means of the following equation:
[tex]x=x_{o}+v*(t-t_{o})[/tex]
where:
x = final point [m]
xo = initial point [m]
v = velocity (slope) [m/s]
t = final time [s]
to = initial time [s]
So the slope in the graph gives the constant velocity
[tex]v=\frac{x-x_{o}}{t-t_{o}}[/tex]
Therefore, after the time to there is no displacement, that is the particle comes to rest.
A negative charge of -0.00067 C and a positive charge of 0.00096 C are separated by 0.7 m. What is the force between the two charges?
Answer:
-11,813.87N
Explanation:
According to coulombs law, the Force between the two charges is expressed as;
F = kq1q2/d²
k is the coulombs constant = 9*10⁹kg⋅m³⋅s⁻²⋅C⁻².
q1 = -0.00067 C
q2 = 0.00096 C
d = 0.7m
Substitute into the formula:
F = 9*10^9 * -0.00067 * 0.00096/0.7²
F = 9*10⁹*-6.7*10⁻⁴*9.6*10⁻⁴/0.49
F = -578.88*10⁹⁻⁸/0.49
F = -578.88*10/0.49
F = -5788.8/0.49
F = -11,813.87N
Hence the force between the two charges is -11,813.87N