A worker pushes on a crate, and it experiences a net force of

300 N. If the crate moves with an acceleration of 0.750 m/s2

,

what is its mass?​

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]

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Answer:

if the question is referring to what happens when ice freezes you could say that the water molecules have lass energy so they don't move around as much

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: 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.

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#SPJ2

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:

its going very fast

Explanation:

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:

The amount of heat required is [tex]H_t = 1.37 *10^{6} \ J [/tex]

Explanation:

From the question we are told that

The mass of water is [tex]m_w = 20 \ ounce = 20 * 28.3495 = 5.7 *10^2 g[/tex]

The temperature of the water before drinking is [tex]T_w = 3.8 ^oC[/tex]

The temperature of the body is [tex]T_b = 36.6^oC[/tex]

Generally the amount of heat required to move the water from its former temperature to the body temperature is

[tex]H= m_w * c_w * \Delta T[/tex]

Here [tex]c_w [/tex] is the specific heat of water with value [tex]c_w = 4.18 J/g^oC [/tex]

So

[tex]H= 5.7 *10^2 * 4.18 * (36.6 - 3.8)[/tex]

=> [tex]H= 7.8 *10^{4} \ J [/tex]

Generally the no of mole of sweat present mass of water is

[tex]n = \frac{m_w}{Z_s}[/tex]

Here [tex]Z_w[/tex] is the molar mass of sweat with value

[tex]Z_w = 18.015 g/mol[/tex]

=> [tex]n = \frac{5.7 *10^2}{18.015}[/tex]

=> [tex]n = 31.6 \ moles [/tex]

Generally the heat required to vaporize the number of moles of the sweat is mathematically represented as

[tex]H_v = n * L_v[/tex]

Here [tex]L_v[/tex] is the latent heat of vaporization with value [tex]L_v = 7 *10^{3} J/mol[/tex]

=> [tex]H_v = 31.6 * 7 *10^{3} [/tex]

=> [tex]H_v = 1.29 *10^{6} \ J [/tex]

Generally the overall amount of heat energy required is

[tex]H_t = H + H_v[/tex]

=> [tex]H_t = 7.8 *10^{4} + 1.29 *10^{6}[/tex]

=> [tex]H_t = 1.37 *10^{6} \ J [/tex]

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:

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: 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:

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.

(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

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Answer:

Explanation:

The force of attraction between 2 masses.

The SPEED of a car on the highway is 75 mph.

(You're correct on #6.)

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:

Explanation:

if you bounce a tennis ball, it will come back up as an equal reaction to your action (dropping it). there is an equal but opposite reaction in this scenario, demonstrating newton's third law.

Answer:

when u jump in the air and hit the ground the ground applies the same force back which applies a opposite force which causes u to propel into the air

Explanation:

hope this helped :)

Answer:

Question: The equation for water is H2 +O2 → H2O. To balance the equation, which coefficient should be placed in front of H2 and H2O?

Answer: B.)2

Explanation:

The coefficient that would need to be placed in front of the H2, to balance the equation would be 2. After doing this all of the atoms for their respective elements will be balanced.

To balance the equation, coefficient 2 should be placed in front of H2 and H2O.

BALANCING EQUATION:

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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

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:

The value is [tex]E_i = 1.5596 *10^{-18} \ J[/tex]

Explanation:

From the question we are told that

The wavelength is [tex]\lambda = 48.2 nm = 48.2 *10^{- 9 }\ m[/tex]

The velocity is [tex]v = 2.371*10^6 \ m/s[/tex]

The mass of electron is [tex]m_e = 9.109*10^{-31} \ kg[/tex]

Generally the energy of the incident light is mathematically represented as

[tex]E = \frac{h * c}{\lambda}[/tex]

Here c is the speed of light with value [tex]c = 3.0 *10^{8} \ m/s[/tex]

h is the Planck constant with value [tex]h = 6.62607015 * 10^{-34 } J\cdot s[/tex]

So

[tex]E = \frac{6.62607015 * 10^{-34 }* 3.0 *10^{8}}{48.2 *10^{- 9 }}[/tex]

=> [tex]E = 4.12 *10^{-18} \ J [/tex]

Generally the kinetic energy is mathematically represented as

[tex]E_k = \frac{1}{2} * m_e * v^2[/tex]

=> [tex]E_k = \frac{1}{2} * 9.109*10^{-31} * (2.371*10^6 )^2[/tex]

=> [tex]E_k = 2.56 *0^{-18} \ J [/tex]

Generally the ionization energy is mathematically represented as

[tex]E_i = 4.12 *10^{-18} - 2.56 *0^{-18}[/tex]

=>     [tex]E_i  =  1.5596 *10^{-18} \  J[/tex]

Answer:

C

Explanation:

Answer:

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

Explanation:

the outcome was not good

Explanation:

The matter passes in the directions of the noise and flows from the source to a receiver like sound flows through a substance. As the sound flows through a fluid, the material is disrupted for an amount of time, but after the sound leaves, it restored to its normal location.