- Lola applies force to the handle of a jack so that she can change the flat tire on her car. If she uses
1,250 joules of energy on a jack that is 40 percent efficient, how much energy is available to raise
the car?

Answer: Change distance and charge

Explanation:

Increase the distance between the two particles, and remove charge from one or more of the particles.

Coulomb's Law is:

[tex]F=\frac{kq_1q_2}{r^2 }[/tex]

k being a constant of 8.99 x 10^9 (units)

q1 and q2 being the magnitude of charges

r being the distance between them

Answer:

true

hope this helps !

Answer:

60kg

Explanation:

F= ma

96 = m ×1.6

m= 96/1.6

=60 kg

Answer:Comparison of the embryological development of different species also reveals similarities that show relationships not evident in the fully-formed anatomy.

Explanation:

Comparison of the embryological development of different species also reveals similarities that show relationships not evident in the fully-formed anatomy.

(Have a great day :D)

Explanation:

for v vs t graph for t=9 to 11,v=15kmph

similarly v2=0,v3=60kmph&v4= -40kmph

Answer:

Yeah I know you will try to get me this weekend so I can make sure I get a good time and I will talk to you later bye and get back to you

Answer:

The cap expanded

Explanation:

As you run hot water (Or any substance) onto something it expands, With coldwater it shrinks. Its like clothes, If a shirt is to small wash it in hot water. If it is to big run it in cold water.

I think it's 0.6.                 ∞

Hopefully, it's correct... ∵-∵

Answer:

False

Explanation:

Answer:

The polar coordinate of [tex]P(x,y) = (-3.50\,m,-2.50\,m)[/tex] is [tex]P (r,\theta) = (4.301\,m, 215.538^{\circ})[/tex].

Explanation:

Given a point in rectangular form, that is [tex]P(x,y) = (x,y)[/tex], its polar form is defined by:

[tex]P(x,y) = (r,\theta)[/tex] (1)

Where:

[tex]r[/tex] - Norm, measured in meters.

[tex]\theta[/tex] - Direction, measured in sexagesimal degrees.

The norm of the point is determined by Pythagorean Theorem:

[tex]r = \sqrt{x^{2}+y^{2}}[/tex] (2)

And direction is calculated by following trigonometric relation:

[tex]\theta = \tan^{-1} \frac{y}{x}[/tex] (3)

If we know that [tex]x = -3.50\,m[/tex] and [tex]y = -2.50\,m[/tex], then the components of coordinates in polar form is:

[tex]r = \sqrt{(-3.50\,m)^{2}+(-2.50\,m)^{2}}[/tex]

[tex]r \approx 4.301\,m[/tex]

Since [tex]x < 0\,m[/tex] and [tex]y < 0\,m[/tex], direction is located at 3rd Quadrant. Given that tangent function has a period of 180º, we find direction by using this formula:

[tex]\theta = 180^{\circ}+\tan^{-1} \left(\frac{-2.50\,m}{-3.50\,m} \right)[/tex]

[tex]\theta \approx 215.538^{\circ}[/tex]

The polar coordinate of [tex]P(x,y) = (-3.50\,m,-2.50\,m)[/tex] is [tex]P (r,\theta) = (4.301\,m, 215.538^{\circ})[/tex].

Answer:

50 J

Explanation:

<3

Answer:

You input potential (stored) energy into the rubber band system when you stretched the rubber band back. Because it is an elastic system, this kind of potential energy is specifically called elastic potential energy. ... When the rubber band is released, the potential energy is quickly converted to kinetic (motion) energy.

Explanation:

Answer:

triangulation

Explanation:

using your compass

Answer:

B. they measure the difference between arrival of P waves and S waves.

Explanation:

Answer:

Explanation:

Remark

In general, these 3rd class levers are very inefficient. Because the force distance is smaller than the load distance, you need to pull upward with more force that the weight of the load. So whatever the load is, the force is going to be much greater.

The distances are always measured to the pivot unless you are asked something specific otherwise.

Givens

F = ?

weight = 6N

Force Distance = F*d = 0.5 m

Weight Distance =W*d1 = 2 m

Formula

F*Fd = W*Wd

Solution

F*0.5 = 6 * 2            Divide by 0.5

F = 12/0.5

F = 24 N upwards

Answer:

0.99932188871837 rounded to 2 significant figures is 1.00m or 1.0m

Explanation:

Step 1 - First calculate the force with the formula: Force = mass ×  acceleration due to gravity/ (F=mg) {g= 9.8m/s²}

4.0kg × 9.8m/s² = 39.2 Newtons

Step 2 - Then calculate the Kinectic power with the following procedure:

Kinectic force = the coefficient of Kf × mg

0.50μ × 39.2 N = 19.6 Newtons of Kinectic force

Step 3 - Use the equation for Work that is = F×d; use the value of Kf and multiply it by the given distance

W = 19.6 N × 2.0m = 39.2 Joules of energy

↓Remember that the product of Work is Energy (W=E) and that in some cases, we can set W as = kinetic energy ( [tex]\frac{1}{2}[/tex]mass×velocity²) or as = gravitational potential energy (mass *acceleration due to gravity*height)

↑Since the unknown variable that we are told to find is 'height', let's use the second formula to help us solve the problem, where we said that GPE = mgh / PEg = mgh

Step 4 - Find the missing height using the formula, Energy gained from (W = mgh), by rewriting (mgh) to solve for h

39.2 J of E = 4.0kg × (9.8 m/s² × h)

h = [tex]\frac{PEg}{mg}[/tex]

h = [tex]\frac{39.2N}{9.8m/s{2} times 4.0kg}[/tex]  

Height of box on-ramp = 1.0m

Answer:

the horizontal distance covered by the cannonball before it hits the ground is 327.5 m

Explanation:

Given;

height of the cliff, h = 210 m

initial horizontal velocity of the cannonball, Ux = 50 m/s

initial vertical velocity of the cannonball, Uy = 0

The time for the cannonball to reach the ground is calculated as;

[tex]h = u_yt - \frac{1}{2} gt^2\\\\h = 0 - \frac{1}{2} gt^2\\\\t = \sqrt{\frac{2h}{g} } \\\\t = \sqrt{\frac{2\times 210}{9.8} }\\\\t = 6.55 \ s[/tex]

The horizontal distance covered by the cannonball before it hits the ground is calculated as;

[tex]X = U_x \times \ t\\\\X = 50 \times \ 6.55\\\\X = 327.5 \ m[/tex]

Therefore, the horizontal distance covered by the cannonball before it hits the ground is 327.5 m

The best description of twins with identical DNA is that the twins will be identical physically and behaviorally. Thus, the correct option is C.

Identical twins are also called as the monozygotic twins which result from the fertilization of a single egg by a single sperm, or with the fertilized egg which are then splitting into two individual offspring. Identical twins share the same genomes and are also of the same sex.

Identical twins are also called as monozygotic twins, these result from the fertilization of a single egg by a single sperm, with the fertilized egg which then splitting into two identical cells. Identical twins share the same genomes and are always of the same sex.

Therefore, the correct option is C.

Learn more about DNA here:

https://brainly.com/question/21668095

#SPJ6

Answer:  .15

Explanation:

K.E. = 1/2 mv2

so m = 2 (K.E.)/v2

so m = 2 (4.8)/64 = .15

Answer: The scientific revolution began in Europe toward the end of the Renaissance period, and continued through the late 18th century, influencing the intellectual social movement known as the Enlightenment

Explanation:

-Sounds of Vehicles

-Speakers or TV's at High Volume

-Kitchen Appliances

-Electronic Appliances

-Barking of dogs

Answer:

there are many

Explanation:

includeing planes

loud music

cars

traffic noise

Answer:

The answer is 1100kg.

Explanation:

First, you have to find the acceleration using the formula, a = (v-u)/t where v is final speed, u is initial speed and t is time :

[tex]a = \frac{v - u}{t} [/tex]

[tex]a = \frac{27 - 0}{4.5} [/tex]

[tex]a = 6m {s}^{ - 2} [/tex]

Next, you have to apply force formula, F = m×a where m is mass :

[tex]F = m \times a[/tex]

[tex]6600 = m \times 6[/tex]

[tex]m = 6600 \div 6[/tex]

[tex]m = 1100kg[/tex]

Answer:What' the question?

Explanation:

Answer:

Explanation:

Your answer is correct

Answer:

[tex]\boxed {\boxed {\sf C. \ 5.0 \ m/s}}[/tex]

Explanation:

Momentum is the product of mass and velocity. The formula is:

[tex]p=mv[/tex]

The mass of the cart is 2.0 kilograms. The momentum is 10.0 kg m/s. The velocity is unknown.

[tex]m= 2.0 \ kg \\p= 10.0 \ kg \ m/s[/tex]

Substitute the values into the formula.

[tex]10.0 \ kg \ m/s= (2.0 \ kg ) v[/tex]

We want to solve for the velocity (v). Therefore we must isolate the variable. It is being multiplied and the inverse of multiplication is division. Divide both sides of the equation by 2.0 kg.

[tex]\frac { 10.0 \ kg \ m/s}{2.0 \ kg}=\frac{(2.0 \ kg )v}{2.0 \ kg}[/tex]

The kilograms will cancel each other out.

[tex]\frac { 10.0 \ m/s}{2.0}=v[/tex]

[tex]5.0 \ m/s=v[/tex]

The velocity is 5 meters per second.

Answer:

Final temperature, T2 = 31.11°C

Explanation:

Given the following data;

Mass = 4.5kg

Initial temperature = 20°C

Quantity of heat = 90000J

Specific heat capacity = 1,800. J/kg-°C

To find the final temperature;

Heat capacity is given by the formula;

[tex] Q = mcdt[/tex]

Where;

Q represents the heat capacity or quantity of heat.

m represents the mass of an object.

c represents the specific heat capacity of water.

dt represents the change in temperature.

Making dt the subject of formula, we have;

[tex] dt = \frac {Q}{mc} [/tex]

Substituting into the equation, we have;

[tex] dt = \frac {90000}{4.5*1800} [/tex]

[tex] dt = \frac {90000}{8100} [/tex]

dt = 11.11°C

Now, to find the final temperature T2;

But, dt = T2 - T1

Substituting into the equation, we have;

T2 = 11.11 + 20

Final temperature, T2 = 31.11°C

Answer:

1. m  = 40 kg

2. m = 0.55 kg

3. Because of the different values of acceleration due to gravity, g, on the planet and the earth.

Explanation:

1. GPE = 12000 J

h = 30 meters

g = 10 m/[tex]s^{2}[/tex]

But,

GPE = mgh

where: m is the mass, g is the acceleration due to gravity, and h is the height.

12000 = m x 10 x 30

12000  = 300 m

m = [tex]\frac{12000}{300}[/tex]

   = 40 kg

The mass of the diver is 40 kg.

2. GPE = 63.25 J

h = 11.5 meters

g = 10 m/[tex]s^{2}[/tex]

GPE = mgh

63.25 = m x 10 x 11.5

63.25 = 115 m

m = [tex]\frac{63.25}{115}[/tex]

   = 0.55 kg

The mass of the ball is 0.55 kg.

3. The pole vaulter's GPE on the earth would not be the same as that on another planet due to the variation in the value of the acceleration due to gravity on the two planets, even if he cover the same height.

Given that: m = 60 kg, h = 25 m, determine the GPE on the earth that has g = 10 m/[tex]s^{2}[/tex], and another planet with g = 6.5 m/

Thus, on the earth;

GPE = mgh

       = 60 x 10 x 25

       = 15000

GPE = 15000 J

On the planet;

GPE = mgh

       = 60 x 6.5 x 25

       = 9750

GPE = 9750 J