A car goes 500m in 5 sec. It was moving 10 m/sec to begin with, what is
its final velocity?*

Answer:

The magnitude of the hiker’s displacement is 2.96 km

Explanation:

Let the initial displacement of the hiker, = x = 2km

the final displacement of the hiker, = y = 1.4 km

The resultant of the two vectors, According to Pythagorean theorem is the vector sum of the two vectors.

R' = x' + y'

Check the image uploaded for solution;

Answer:

152,000 N

Explanation:

(a) Initial potential energy = final kinetic energy

mgh = ½ mv²

v = √(2gh)

v = √(2 × 10 m/s² × 3.00 m)

v = 7.75 m/s

(b) Work done on pile hammer = change in energy

FΔy = 0 − (mgh + ½ mv²)

F (-0.074 m) = -((365 kg) (10 m/s²) (0.074 m) + ½ (365 kg) (7.75 m/s)²)

F (-0.074 m) = -11220.1 J

F ≈ 152,000 N

Answer: the proper diameter is 6.137 ft

Explanation:

first we find the volume of box using the relation, which is;

V = 2 x 5 x 1.5 = 15 ft³

we  find the buoyant force on the box by calculating the weight of water displaced.

FB = V x y

where  y is the specific weight of sea water(62.4 lbf/ft³)

so we Substitute

FB = 15 x 62.4 = 936 lbf  

now we find the upward force required by the balloon

FR = (W - FB) x 120%

= 1.2 (W - FB)

where W is the weight of the box treasure(7000 lb)

so we  Substitute,

FB = 1.2( 7000 - 936 ) = 7276.8 lbf

Because the universal gas constant contains a Rankine in its units, we make use of Rankine for our temperature

so we find the density of air at 3 atm using ideal gas relation,

Pair = p/RT

Here, p is the pressure acting (3 atm), R is the universal gas constant (1716 ft²/S²-R), and T is the temperature (520°R),

Substitute so we substitute

Pair = (3 * 2116.22) / (1516 * 520)

= 0.007114  lbf.ft³

next we find the specific weight of air;

Yair = Pair * g

g is acceleration due to gravity(32.2 ft/s²)

Yair =  

0.007114 * 32.2

= 0.23 Ibf /ft³

Now we find diameter of the balloon by balancing the net force required

FR = (y - yair) * V - Wb

= (y - yair) x (π/6)d³ - Wb  

d is the diameter of the balloon.

so we Substitute, 7276.8 lbf for FR,

62.4 Ibf/ft³ for  y, 0.23 for lbf/ft³ for Yair, 350 lb for Wb

so

7276.8 = (62.4 - 0.23)πd³  - 250

d³ = 231.23 ft³

d = 6.137 ft   

Therefore, the proper diameter is 6.137 ft

Answer: 490m

Explanation: 1/2 * 9.8m/s/s * 10s

Answer:

Option B 150 Metre

Answer:

B. 150 m

Explanation:

In order to answer the question, it is important to know the formula for "velocity."

velocity = [tex]\frac{distance}{time}[/tex]

What is being asked? The distance covered if the time taken is 10 sec.

So this means: velocity x  time = distance

Step 1: Convert 10 sec. to hour.

10 sec. x [tex]\frac{1 hour}{3,600 sec.}[/tex] = 0.00278 hr.

Step 2: Plug in the values to the formula.

distance = 54 [tex]\frac{km}{hr}[/tex] x 0.00278 hr.

distance = 0.150 km

Step 3: The choices are in meters (m), so let's convert 0.150 km to meter.

0.150 km x [tex]\frac{1,000 m}{1 km}[/tex] = 150 meters

The answer is: 150 m

Answer: Planet A is closer to the Sun and has much greater atmospheric pressure. This suggests that planet A has a thicker atmosphere. Planet A's atmosphere is also mostly made of carbon dioxide, which is a greenhouse gas. This gas retains heat, raising the surface temperature of planet A.

Explanation:

Planet A is closer to the Sun and has much greater atmospheric pressure. This suggests that planet A has a thicker atmosphere. Planet A’s atmosphere is also mostly made of carbon dioxide (CO2), which is a greenhouse gas. This gas retains heat, raising the surface temperature of planet A.

Hope this one help.

Answer:

obviously 2 hours cuz 850/425

Explanation:

(a) The minimum speed required for the ball to clear the net is 26.3 m/s.

(b) The horizontal distance of the ball when it clears the net is 11.3 m

(c) The total time spent in the air by the ball is 1 s.

The time of motion of the tennis ball is calculated by using the following kinematic equation as shown below;

[tex]h = h_0 + v_0_yt - \frac{1}{2} gt^2\\\\0.9 = 2.5+ 0 - \frac{1}{2} (9.8) t^2\\\\0.9 = 2.5 - 4.9t^2\\\\4.9t^2 = 1.6\\\\t^2 = \frac{1.6}{4.9} \\\\t^2 = 0.327\\\\t = \sqrt{0.327} \\\\t = 0.57 \ s[/tex]

The minimum speed of the ball is calculated as follows;

[tex]v_x = \frac{X}{t} \\\\v_x = \frac{15}{0.57} \\\\v_x = 26.3 \ m/s[/tex]

The time of motion from top of the high net is calculated as follows;

[tex]t = \sqrt{\frac{2h}{g} } \\\\t = \sqrt{\frac{2\times 0.9}{9.8} } \\\\t = 0.43 \ s[/tex]

Horizontal range = 0.43 x 26.3 = 11.3 m

Total time in air = 0.57 s + 0.43 s = 1.0 s

Learn more about horizontal velocity here: https://brainly.com/question/24949996

Answer:

In the event of a disease caused by an unknown pathogen, it is hard to know which reagent to pick. ... EM, though it may not be able to identify a virus beyond the family level, at least ... Negative staining of stool specimens from these cattle demonstrated a ... This results in a fuzzy halo around the particles in negative stains.Explanation:

Answer: Melting, evaporation and sublimation.

Melting, evaporation and sublimation require an increase in energy.

To determine the changes of state that require an increase in energy, we need to know about changes of state.

Melting, evaporation and sublimation are the changes of state of a substance.

Thus, we can conclude that melting, evaporation and sublimation require an increase in energy.

Learn more about changes of state here:

https://brainly.com/question/18372554

#SPJ2

Answer:

C

Explanation:

Answer:

that car got obliterated almost like the day my uncle said come with me

Explanation:

the outcome was not good

Answer:

Please mark me brainliest and thank me and rate me

Astroid one has less asked her to. Able to use enough force to not only change or keep it self go in the same direction.

(a) If the initial speed both asteroids before collision is the same, then the asteroid with greater mass will have more momentum before collision while the asteroid with lesser mass will have greater momentum after collision.

(b) The force of the impact depends of the velocity change and time of collision of the asteroids.

According to the principle of conservation of linear momentum, the sum of the momentum of each asteroid  before collision must equal the sum of their momentum after collision.

[tex]m_1 u_1 + m_2 u_2 = m_1v_1 + m_2 v_2[/tex]

where;

If the initial speed both asteroids before collision is the same, then the asteroid with greater mass will have more momentum before collision while the asteroid with lesser mass will have greater momentum after collision to conserve the momentum.

The force of the impact depends of the velocity change and time of collision of the asteroids.

[tex]F = \frac{m\Delta v}{t}[/tex]

Learn more here:https://brainly.com/question/24424291

Answer:

maybe the answer is in is D part

Answer:

The change in potential energy of the mass as it goes up the incline is 0.343 joules.

Explanation:

We must remember in this case that change in the potential energy is entirely represented by the change in the gravitational potential energy. From Work-Energy Theorem and definition of work we get that:

[tex]U_{g}= m\cdot g\cdot \Delta y[/tex]

Where:

[tex]U_{g}[/tex] - Gravitational potential energy, measured in Joules.

[tex]m[/tex] - Mass, measured in kilograms.

[tex]g[/tex] - Gravitational acceleration, measured in meters per square second.

[tex]\Delta y[/tex] - Change in vertical height, measured in meters.

This work is the energy needed to counteract effects of gravity at given vertical displacement.

If we know that [tex]m = 0.5\,kg[/tex], [tex]g = 9.807\,\frac{m}{s^{2}}[/tex] and [tex]\Delta y = 0.07\,m[/tex], the change in the potential energy of the mass as it goes up the incline is:

[tex]U_{g} = (0.5\,kg)\cdot \left(9.807\,\frac{m}{s^{2}} \right)\cdot (0.07\,m)[/tex]

[tex]U_{g} = 0.343\,J[/tex]

The change in potential energy of the mass as it goes up the incline is 0.343 joules.

The change in the potential energy (in Joules) of the mass as it goes up the incline is 0.343 J.

We know that

Potential energy = m*g*h

Here m means the mass = 0.5 kg

g means the gravity = 9.8

And, the h means the height  = 7cm = 0.07m

So, the change in the potential energy should be

=0.5*9.8*0.07

=0.343 J

hence, we can conclude that the  change in the potential energy (in Joules) of the mass as it goes up the incline is 0.343 J.

Learn more about energy here: https://brainly.com/question/13203990

Answer:

The car goes, x = 200 [m]

Explanation:

In order to solve this problem we must use the following kinematic equation.

[tex]v_{f} ^{2} =v_{i} ^{2} - (2*a*x)[/tex]

where:

Vf = final velocity = 0

Vi = initial velocity = 40 [m/s]

a = desacceleration = 4 [m/s^2]

x = distance traveled [m]

Note: The negative sign of the above equation indicates that the vehicle is slowing down

Now replacing:

0 = (40)^2 - (2*4*x)

(0 - 40^2) = - 8*x

x = 200 [m]

Answer:

24.69 meters

Explanation:

sorry if it's not right.

answer:

[tex]h=24.69m[/tex]

step-by-step explanation:

[tex]eg=mgh \\ek=\frac{1}{2} mv^2[/tex]

eg= gravitational energy

ek= kinetic energy

now, since no mass is given of the ball, both equations on their own do nothing for us, except leave us scratching our heads wondering how to figure out the problem. but, since the question states, “and no air resistance,” we now know, according to the law of conservation of energy, that the energy of the two equations will equal each other because none of the energy has dissipated or left the system.

the amount of energy present during the initial phase of the woman about to throw the ball will be present in the final phase, which will be at its highest point (according to this problem).

so now [tex]eg=ek[/tex]

knowing this, we can now set the equations equal

[tex]eg=ek\\mgh=\frac{1}{2} mv^2[/tex]

the two m’s cancel out, making the mass of the ball insignificant and not influential; next, substitute the values we are given in the problem

[tex](22m/s),(9.8m/s^2)\\m(9.8m/s^2)h=\frac{1}{2} m(22m/s)^2\\(9.8 m/s^2)h=\frac{1}{2} (22m/s)^2\\(9.8m/s^2)h=1/2 (484m^2/s^2)\\(9.8m/s^2)h=1/2 (242m^2/s^2)\\\\h= (242m^2/s^2)/(9.8m/s^2)[/tex]

as you can see, all units that need to be canceled out are indeed canceled, leaving us with just m, meters, which is what height is measured in

therefore, [tex]h=24.69m[/tex]

Answer:

1.84m

Explanation:

Given parameters:

Initial velocity  = 6m/s

Unknown:

height of jump  = ?

Solution:

To solve this problem, we have to apply the right motion equation:

        V²  = U²  - 2gH

V is the final velocity

U is the initial velocity

g is the acceleration due to gravity  = 9.8m/s²

H is the height

   Final velocity is 0

  Solve;

           0² = 6² - 2x9.8xH

           -36  = -19.6H

               H = 1.84m

Answer:

C. 188

Explanation:

Getting the "maximum target heart rate" of a person is very easy. All you have to do is to subtract Juan's age (32) from 220.

So, 220-32 = 188

Therefore, Juan's maximum target heart rate is 188.

When exercising, it is very important not to exceed the maximum heart rate in order to prevent straining yourself. The maximum target heart rate is also being used in order to get your actual "target heart rate." This will depend on the type exercise intensity you want, whether it is moderate or vigorous.

Answer:

1- t^3

2- t^2

3- t1

Explanation:

The acceleration produced in a body, while travelling in a circular motion, due to change in direction of motion is called centripetal acceleration. The formula of the centripetal acceleration is as follows:

ac = v²/r

where,

ac = centripetal acceleration

v = speed

r = radius

for a constant radius the centripetal acceleration will be directly proportional to the speed of object. The speed of pendulum will be lowest at t1 due to zero speed initially. Then the speed will increase gradually having greater speed at t^2 and the highest speed and centripetal acceleration at t^3. Therefore, the three instants in tie can be written in following order from greatest centripetal acceleration to lowest:

1- t^3

2- t^2

3- t1

Answer:

Explanation:

Newtons third law says an applied force will produce an equal but opposite force.

[tex]F_A_B =-F_B_A[/tex]

Answer: poor construction of houses

Explanation:

Majority of the people that died in Iran were as a result of poor building methods coupled with the fact that there was lack of proper regulation.

California experienced a similar earthquake but due to safer construction methods, about three people died.

Due to population boom in Iran and house shortage, this resulted in builders building cheap houses which were not strong enough.

Answer:

Height = 1.54 m

Explanation:

Given:

Velocity = 41 m/s

Distance = 23 m

Find:

Height

Computation:

We know that

a = 9.8 m/s²

Time = Distance / Velocity

Time = 23 / 41

Time = 0.56 second

Height = (1/2)(9.8)(0.56)²

Height = 1.54 m

Answer:

(assume moving in the positive direction, vi = + 20 m/s)

Explanation:

Answer:

the correct order of events is: 5 7 6 3 4 1 2

Explanation:

In this exercise, you order the events to solve the problem of the electric field created by a line of charge a line of charge

the order of events is

a) We define a reference   5

b) cut the line into segments each one is a charge differential  7

c) find the vector of the position of charges  6

d) find the point where field  is calculated   3

e) find the distance between each charge point and point of interest   4

f) insert Coulomb's law 1

f) perform the integral of line 2

therefore the correct order of events is: 5 7 6 3 4 1 2