Please help ASAP !!!!

Answer:

c) 6 m/s²

Explanation:

Answer:

A E and F are the correct answers

Explanation:

Answer:

A E F are correct

Explanation:

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[tex] {v}^{2} - {v(0)}^{2} = 2.a.∆x[/tex]

[tex]v = final \: \: velocity[/tex]

[tex]v(0) = the \: \: velocity \: \: in \: \: the \: \: rest \: \: which \: \: is \: \: zero \\ [/tex]

[tex]a = acceleration[/tex]

[tex]∆x = covered \: \: distance[/tex]

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[tex] {v}^{2} - ({0})^{2} = 2 \times 26 \times 402 [/tex]

[tex] v = \sqrt{2 \times 26 \times 402} [/tex]

[tex]v = \sqrt{20904} [/tex]

[tex]v = 144.58 \: \: \frac{m}{s} [/tex]

Done...

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Answer:

a

Explanation:

a

Answer:

B.

Velocity describes how fast something is going, whereas Speed describes how fast something is going and in which direction.

Explanation:

. If the above statement is true, then describe an example of such a motion. ... b. What was the displacement for the entire trip? 0 miles (You finish where you started) ... Speed is a quantity that describes how fast or how slow an object is moving.

Answer:

The Bt gene is inserted into one plant cell by using a bacterial plasmid.

Explanation:

Answer:law of interia(1st law)

Explanation:

Answer:

I'm terrible at explaining so here's a screenshot, please do not listen to the other answer, it is wrong.

- Ripper

Explanation:

Answer:

C is the correct answer !!!

Explanation:

Answer:

All i got to say is that he is dead dead

Explanation:

Answer:

yes

Explanation:

cuz 15x2=30 30x2=60 60=1 hour, and the limited is 80 km per hour

15=25

15x4=60 25x4=100

so yes

he was going 100km per hour

Answer:

B

Magnified images will not be created.

Explanation:

I did it and this was the correct answer

Answer:

B is correct the person above me is also correct. Hope this helps

Explanation:

The acceleration of the truck is obtained from the calculation done as  0.055 m/s^2.

We know that the acceleration is defined as the rate of the change of the velocity of the object with time and we can be able to obtain the acceleration by the use of the equations of kinematics as usual.

Initial velocity =  1.8 km/h  or 0.5 m/s

Final velocity = 24.0 km/h or 6.67 m/s

Distance covered = 4.0 * 10^2 m

Then;

v^2 = u^2 + 2as

v = final velocity

u = initial velocity

a = acceleration

s = distance covered

a = v^2 - u^2/2s

a = (6.67)^2 - (0.5)^2/2 *  4.0 * 10^2

a = 44.4 - 0.25/800

a = 0.055 m/s^2

Learn more about acceleration:https://brainly.com/question/12550364

#SPJ1

Vertical:

(20 m/s) sin(25º) ≈ 8.45 m/s

Horizontal:

(20 m/s) cos(25º) ≈ 18.1 m/s

Answer:

Explanation:

The sandpaper block did not move because the forces of friction and gravity were balanced.

Answer:

(a) La aceleración de la gravedad en esa órbita es 0.22 [tex]\frac{m}{s^{2} }[/tex]

(b) Un satélite de 1,200 kg pesará allí 264 N.

Explanation:

(a) Cada punto del espacio tiene un  valor del campo proporcional a la función, siguiendo el modelo de gravitación de Newton:

[tex]g=G*\frac{m}{r^{2} }[/tex]

donde m será masa, r  la distancia entre los objetos y G la constante de gravitación universal, cuyo valor es [tex]G=6.672*10^{-11}\frac{N*m^{2} }{kg }[/tex]

En este caso:

Reemplazando:

[tex]g=6.672*10^{-11}\frac{N*m^{2} }{kg }*\frac{6*10^{24}kg }{(42,370,000 m)^{2} }[/tex]

Resolviendo, obtenes:

g= 0.22 [tex]\frac{m}{s^{2} }[/tex]

La aceleración de la gravedad en esa órbita es 0.22 [tex]\frac{m}{s^{2} }[/tex]

(b) La ley fundamental de la dinámica o segunda ley de Newton expresa que la fuerza neta que es aplicada sobre un cuerpo es proporcional a la aceleración que adquiere en su trayectoria.  Esto se expresa matemáticamente como:

F= m*a

en donde  F es fuerza neta , m la masa y a la aceleración.

El peso es la fuerza que ejerce la gravedad sobre una masa, por lo que se obtiene de manera análoga a la fuerza:

P=m*g

En este caso la masa m tiene un valor de 1,200 kg y la gravedad g un valor de 0.22 [tex]\frac{m}{s^{2} }[/tex].

Reemplazando:

P=1,200 kg*0.22 [tex]\frac{m}{s^{2} }[/tex]

Resolviendo:

P= 264 N

Un satélite de 1,200 kg pesará allí 264 N.

Answer:

Your answer is: D) Tinea Pedis

Explanation:

Hope this helped : )

Answer:

Explanation:

The speed of the car can be found by using the formula

where

a is the acceleration

v is the speed

t is the time

From the question we have

v = 10 × 25

We have the final answer as

Hope this helps you

Răspuns:

7: 4

Explicaţie:

Formula pentru calcularea cantității de căldură absorbită este exprimată ca;

Q = mc∆t

m este masa substanței

c este capacitatea termică specifică

∆t este schimbarea temperaturii

Conform legii calorimetriei, căldura pierdută de substanța rece = căldura câștigată de substanța fierbinte.

Folosind formula

(mc∆t) rece = (mc∆t) fierbinte

McCw∆tc = MhCw∆th

Deoarece au aceeași capacitate de căldură specifică, se vor anula. Ecuația devine;

Mc∆tc = Mh∆th ...... 1

Pentru apa rece;

∆tc = 45 ° C - 10 ° C

∆tc = 35 ° C

Pentru apa fierbinte:

∆th = 65 ° C - 45 ° C

∆th = 20 ° C

Înlocuiți în ecuația 1;

Mc (35) = Mh (20)

35Mc = 20Mh

Luând raportul dintre masa apei reci și cea fierbinte:

Mh / Mc = 35/20

Mh / Mc = 7/4

Prin urmare, lichidul trebuie amestecat împreună în raportul 7: 4

Answer:

t = 0.55 s

Explanation:

Given that,

Height of the marble, h = 1.5 m

We need to find the time for which the marble is in air. Let the time is t. Using second equation of motion to find it as follows :

[tex]h=ut+\dfrac{1}{2}at^2[/tex]

Here, u = 0 and a = g

[tex]h=\dfrac{1}{2}gt^2\\\\t=\sqrt{\dfrac{2h}{g}} \\\\t=\sqrt{\dfrac{2\cdot1.5}{9.8}}\\\\t=0.55\ s[/tex]

So, the marble is in air for 0.55 s. Hence, the correct option is (c).

[tex]\sf{m_1}[/tex] = 8kg

[tex]\sf{m_2}[/tex] = 4kg

g = 10m/s²

→Acceleration of block

→Tension in strings

Let, the two equation will be ,

[tex]\leadsto[/tex] 8g - T = 8a ..... Equation no (1)

[tex]\leadsto[/tex] T - 4g = 4a ..... Equation no (2)

Putting the value of equation no (1) and (2) we get,

[tex]\implies[/tex] 4g = 12a

[tex]\implies[/tex] 4 × 10 = 12a

[tex]\implies[/tex] 40 = 12a

[tex]\implies[/tex] a = [tex]\sf\dfrac{\cancel{40}}{\cancel{12}}[/tex]

[tex]\dashrightarrow[/tex] a = [tex]\dfrac{10}{3}[/tex]

Again, we have to putting the value of a in the equation no (2) we get,

[tex]\implies[/tex] T - 4g = 4 × [tex]\dfrac{10}{3}[/tex]

[tex]\implies[/tex] T - 4 × 10 = 4 × [tex]\dfrac{10}{3}[/tex]

[tex]\implies[/tex] T - 40 = [tex]\dfrac{40}{3}[/tex]

[tex]\implies[/tex] T = [tex]\dfrac{40}{3}[/tex] + 40

[tex]\implies[/tex] T = [tex]\dfrac{40 + 120}{3}[/tex]

[tex]\dashrightarrow[/tex] T = [tex]\dfrac{160}{3}[/tex] N

[tex]\therefore[/tex] Acceleration of block = [tex]\dfrac{10}{3}[/tex] m/s².

And, Tension in strings = [tex]\dfrac{160}{3}[/tex] N

Answer:

Explanation:

According to Newton's second law of lmotion

Force = mass × acceleration

Given

Mass = 1kg

Force = 2N

Required

Acceleration of the 2N body

From the formula

Acceleration = Force/mass

Acceleration = 2N/1

Acceleration = 2m/s²

Answer:

53.53 km/h

Explanation:

Given that the person drives for 30.0 min at 80.0 km/h, 12.0 min at 105 km/h, and 45.0 min at 40.0 km/h, and he spends 15.0 min eating lunch and buying gas.

So, the total time to complete the journey is

t=30+12+45+15=102 min

[tex]=\frac{102}{60}=1.7[/tex] hours

As distance=(speed)x(time), so

the distance covered in 30 minutes with a speed of 80 km/h

[tex]d_1=80 \times \frac{30}{60}=40[/tex] km.

The distance covered in 12 minutes with a speed of 105 km/h

[tex]d_2=105 \times \frac{12}{60}=21 km[/tex].

The distance covered in 45 minutes with a speed of 40 km/h

[tex]d_3=40 \times \frac{45}{60}=30 km[/tex].

So, to the total distance covered is

[tex]d=d_1+d_2+d_3[/tex]

[tex]=40+21+30=91 km[/tex]

As the average speed = (Total distance covered)/(Total time taken)

So, the average speed for the whole journey

[tex]=\frac{d}{t}[/tex]

[tex]=\frac{91}{1.7}= 53.53 km/h[/tex].

Hence, the average speed for the trip is 53.53 km/h.

Answer:

(a) 5.62 m/s²

(b) 5.46 m/s²

Explanation:

The given values are:

mass,

m = 50 kg

angle

= 35°

(a)

If friction neglected,

⇒ [tex]F_x=mgSin \theta=ma[/tex]

⇒ [tex]a_x=gSin \theta[/tex]

       [tex]=9.8 \ Sin35^{\circ}[/tex]

       [tex]=5.62 \ m/s^2[/tex]

(b)

If friction present,

⇒ [tex]F_x=mgCos \theta[/tex]

⇒ [tex]F_x=mgSin \theta-\mu_r mgCos \theta[/tex]

⇒ [tex]a=gSin \theta-\mu_rgCos \theta[/tex]

      [tex]=9.8 \ Sin35^{\circ}-0.02\times 9.8 \ Cos30^{\circ}[/tex]

      [tex]=5.46 \ m/s^2[/tex]

Answer:

A toaster because you plug it up for electric energy and heat to toast it

Answer:

speed of rocket=615.38m/s

Explanation:

Answer:

A. Cue, White Ball, Blue Ball

Explanation:

Visualize in which order things are being hit

1.53 secs :)))))))))))))))

Answer:

D

Explanation:

It does all three