if the dissipated power between a and b equal 210 watt then VB equal​

Answer:

jose

Explanation:

Jose run faster and did more work

because the time Jose took to accomplish the activity is less than Luke

both

both have same mass

The work done by both Jose and Luke is same because the change in potential energy is same.

The power of Jose  is greater than than of Luke  because Jose takes less time to do the same work.

Power is defined in physics as the amount of energy transferred or converted per unit time. The watt is the unit of power in the International System of Units, equal to one joule per second. Power is sometimes referred to as activity in older works. A scalar quantity is power.

Let the mass of each of them is m.

Hence, work done by each of them = mgh ( same for both of them)

As Jose reached the top in 12.6 s and Luke reached the top in 13.3 s.

Power of Jose  = mgh/12.6

Power of Luck = mgh/13.3

Hence, Power of Jose is greater than Power of Luck.

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Answer:

-22.3

Explanation:

Acellus

The net force on particle q2 is 21.7 N.

The given parameters:

The net force on particle q2 is calculated as follows;

[tex]Q_2_{net} = q_{12} \ + \ q_{23}\\\\Q_2_{net} = \frac{kq_1q_2}{r_{12} ^2} \ + \ \frac{kq_2q_3}{r_{23}^2} \\\\Q_2_{net} = \frac{9\times 10^9 \times 8 \times 10^{-6} \times 3.5 \times 10^{-6} }{0.1^2} \ + \ \frac{9 \times 10^9 b\times 3.5 \times 10^{-6} \times (-2.5) \times 10^{-6} }{0.15^2} \\\\Q_2_{net} = 25.2 \ N \ - \ 3.5 \ N\\\\Q_2_{net} = 21.7 \ N[/tex]

Thus, the net force on particle q2 is 21.7 N.

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Answer: Increase in competition for abiotic factors.

Explanation: Resource availability is one of the main factors determining the ecological dynamics of populations or species. Fluctuations in resource availability can increase or decrease the intensity of resource competition. Resource availability and competition can also cause evolutionary changes in life-history traits

Answer:

Explanation:

The answer is c. I am very sure

Answer:

i think its b

Explanation:

im not very sure

A golf ball is a unique ball made specifically for the game of golf.

A golf ball must adhere to specific velocity, distance, and symmetry requirements as well as have a mass of no more than 1.620 oz (45.9 g), a diameter of no less than 1.680 inches (42.7 mm), and no more than 1.620 oz (45.9 g) in total.  

Similar to golf clubs, golf balls must pass testing and approval by The R&A and the United States Golf Association before they can be used in competitions. 

Early in the 20th century, it was discovered that dotting the ball gave the player even more control over the trajectory, flight, and spin of the ball.

Therefore, A golf ball is a unique ball made specifically for the game of golf.

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This may shock you:

We NEVER feel speed, velocity, or motion, as long as it's constant.

We only feel CHANGES in speed, velocity, or motion.

That means speeding up, slowing down, or changing direction.

As long as we're moving in a straight line at a constant speed, we don't feel anything.

Answer:

length of train is 80m

Explanation:

40*2

The stress in the  rod is equal to [tex]2.55 \times 10^8\;N/m[/tex]

Given the following data:

To calculate the stress in the  rod:

First of all, we would determine the area of the rod by using this formula:

[tex]Area = \frac{\pi d^2}{4} \\\\Area = \frac{3.142 \times 0.01^2}{4}[/tex]

Area = 0.00007855 meter.

Mathematically, stress is given by this formula:

[tex]Stress = \frac{Force}{Area}[/tex]

Substituting the given parameters into the formula, we have;

[tex]Stress = \frac{20000}{0.00007855} \\\\Stress = 2.55 \times 10^8\;N/m[/tex]

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Answer:

B Electrons are negatively charged while protons are positively charged

Answer:

Sound and light are similar in that both are forms of energy that travel in waves. They both have properties of wavelength, freqency and amplitude. Here are some differences: Sound can only travel through a medium (substance) while light can travel through empty space.

Answer:

The diagram represents two charges, q1 and q2, separated by a distance d. Which change would produce the greatest increase in the electrical force between the two charges? *

Explanation:

doubling charge q1, only

Doubling the charge q would produce the greatest increase in the electrical force between the two charges.

The value of the electrostatic force of interaction between two point charges is directly proportional to the scalar multiplication of the charges and inversely proportional to the square of the distance between them.

How would you define an Electrical force?

The repulsive or attractive interaction between any two charged bodies is called as an electric force. Similar to any force, its impact and effects on the given body are described by Newton’s laws of motion. The electric force is among the list of other forces that exert over objects.

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Answer:

D. all regions of the spectrum

Explanation:

I did some research ; )

Answer:

[tex]1863.9\ \text{kg}[/tex]

Explanation:

[tex]m_1[/tex] = Mass of car = 1571 kg

[tex]u_1[/tex] = Initial velocity of car = 129 km/h

[tex]u_2[/tex] = Initial velocity of the animal = 0

[tex]v[/tex] = Velocity of combined mass = 59 km/h

[tex]m_2[/tex] = Mass of the animal

As the momentum of the system is conserved we have

[tex]m_1u_1+m_2u_2=(m_1+m_2)v\\\Rightarrow \dfrac{m_1u_1+m_2u_2}{v}-m_1=m_2\\\Rightarrow m_2=\dfrac{1571\times 129+0}{59}-1571\\\Rightarrow m_2=1863.9\ \text{kg}[/tex]

The mass of the animal is [tex]1863.9\ \text{kg}[/tex].

The period of the vertical mass-spring is 0.64 s.

The angular speed of the vertical mass-spring is calculated as follows;

[tex]V_{max} = A \omega\\\\\omega = \frac{V_{max}}{A} \\\\\omega = \frac{7.02}{0.713} \\\\\omega = 9.85 \ rad/s[/tex]

The period of the vertical mass-spring is calculated as follows;

[tex]f = \frac{\omega }{2\pi} \\\\T = \frac{1}{f} \\\\T = \frac{2 \pi}{\omega } \\\\T = \frac{2\pi }{9.85} \\\\T = 0.64 \ s[/tex]

Thus, the period of the vertical mass-spring is 0.64 s.

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Answer:

0.025 m

Explanation:

From the question,

Applying Hook's law

F = ke................... Equation 1

Where F = Force, k = spring constant of the scale, e = maximum distance at which the spring will compress.

make e the subject of the equation

e = F/k....................... Equation 2

Given: F = 10 N, e = 395 N/m

Substitute these values into equation 2

e = 10/395

e = 0.025 m

Answer:

i know da way ese'

Explanation:

Answer:

A. The amount of mass changes only slightly during a chemical

reaction.

Answer:

14m/s

Explanation:

As per Newton's third law, the momentum of the bullet firing will equal the momentum of the guns recoil:

[tex]m_{g}v_{g} = m_{b}v_{b}[/tex]

(.8)v=(.016)(700)

v=11.2/0.8

v=14m/s

Answer:

the similarity is that hands are applied and force

Answer:

P = d g h         pressure = density * g * depth

P = 1000 kg/m^3 * 9.8 m / s^2 * 1.1 * 10E4 m = 1.1 * 10E8 N/m^2

F = P * A = 1.1 * 10E8 N/m^2 * pi * .075^2 / m^2 = 1.9 * 10E6 N/m^2

Answer:

I. The rock that has the most kinetic energy is rock 3.

II. Rock 3 has the most kinetic energy because it weighs the highest among the rocks i.e it has the highest amount of mass. Also, the mass of an object is directly proportional to the kinetic energy possessed by the object; the higher the mass, the higher the kinetic energy.

III. Kinetic energy is taking place rather than potential energy because the rocks are in motion i.e rolling down a hill.

Explanation:

Energy can be defined as the ability (capacity) to do work. The two (2) main types of energy are;

a. Gravitational potential energy (GPE): it is an energy possessed by an object or body due to its position above the earth.

b. Kinetic energy (KE): it is an energy possessed by an object or body due to its motion.

Mathematically, kinetic energy is given by the formula;

[tex] K.E = \frac{1}{2}MV^{2}[/tex]

Where;

K.E represents kinetic energy measured in Joules.

M represents mass measured in kilograms.

V represents velocity measured in metres per seconds square.

From the above, we can deduce the following;

I. The rock that has the most kinetic energy is rock 3.

II. Rock 3 has the most kinetic energy because it weighs the highest among the rocks i.e it has the highest amount of mass. Also, the mass of an object is directly proportional to the kinetic energy possessed by the object; the higher the mass, the higher the kinetic energy.

III. Kinetic energy is taking place rather than potential energy because the rocks are in motion i.e rolling down a hill.

Answer:

Therefore, the centripetal acceleration of the SUV is 3 times ao of the compact car.

Explanation:

FOR SUV:

[tex]ac_{suv} = \frac{mv^2}{r}\\[/tex]

where,

ac_suv = centripetal acceleration of the SUV = ?

m = mass of SUV = 6000 kg

v = speed of SUV = vo

r = radius of path

Therefore,

[tex]ac_{suv} = \frac{6000\ vo^2}{r}\\[/tex]---------------- equation (1)

FOR CAR:

[tex]ao = \frac{mv^2}{r}\\[/tex]

where,

ao = centripetal acceleration of the car = ?

m = mass of car = 2000 kg

v = speed of car = vo

r = radius of path

Therefore,

[tex]ao = \frac{2000\ vo^2}{r}\\[/tex]--------------------- equation (2)

Dividing equation (1) by eq(2):

[tex]\frac{ac_{suv}}{ao} = \frac{6000}{2000}\\\\ac_{surv} = 3ao[/tex]

Therefore, the centripetal acceleration of the SUV is 3 times ao of the compact car.

Answer:

d

Explanation:

middle of a current carrying solenoid creates Mutual inductance

Answer:

"6.67 mm" is the right solution.

Explanation:

The given values are:

As we know, the equation

⇒  [tex]\frac{y}{L} =\frac{x \lambda}{a}[/tex]

On substituting the values, we get

⇒  [tex]\frac{.0125}{2.5}=\frac{(1)(600\times 10^{-9}) }{a}[/tex]

On applying cross multiplication, we get

⇒  [tex].0125a=2.5 (600\times 10^{-9})[/tex]

⇒          [tex]a=\frac{2.5(600\times 10^{-9})}{.0125}[/tex]

⇒             [tex]=1.2\times 10^{-4} \ m[/tex]

For new distance, we have to put this value of "a" in the above equation,

⇒  [tex]\frac{y}{1.5} =\frac{(1)(600\times 10^{-9})}{1.2\times 10^{-4}}[/tex]

⇒  [tex](1.2\times 10^{-4})y=1.5(600\times 10^{-9})[/tex]

⇒                     [tex]y=\frac{1.5(600\times 10^{-9})}{1.2\times 10^{-4}}[/tex]

⇒                        [tex]=3.22\times 10^{-3} \ m[/tex]

The total distance will be twice the value of "y", we get

=  [tex]6.67\times 10^{-3} \ m[/tex]

or,

=  [tex]6.67 \ mm[/tex]

Answer:

6.26 m/s

Explanation:

From the given information:

Using the conservation of Energy;

M.E at A =M.E at B

[tex]\dfrac{1}{2}mv_A^2 + mgh _A = \dfrac{1}{2}mv_B^2 + mgh_B[/tex]

Replacing the values given in the equation:

[tex](1) (9.8) (2 \ m) +\dfrac{1}{2}(0)^2 = 1 \times 9.8 \times 0 + \dfrac{1}{2}(1) \times v_B^2 \\\\ 19.6 + 0 = 0 + 0.5v_B^2\\ \\ v_B^2 = \dfrac{19.6}{0.5} \\ \\ v_B^2 = 39,2 \\ \\ v_B = \sqrt{39.2} \\ \\ \mathbf{v_B = 6.26 \ m/s}[/tex]

Answer:

By 1000 joules

Explanation:

Given

[tex]Weight = 500N[/tex]

[tex]Height = 2.0m[/tex]

Required

By how much does her GPA increases

To do this, we simply calculate the potential energy.

[tex]GPE = mgh[/tex]

Where

[tex]mg = Weight = 500N[/tex]

At the ground level, the height is 0

i.e. [tex]h = 0[/tex]

So:

[tex]GPE = 500N * 0 = 0[/tex]

At:

[tex]h = Height = 2.0m[/tex]

So, we have:

[tex]GPE = mgh[/tex]

[tex]GPE = 500N * 2.0m[/tex]

[tex]GPE = 1000J[/tex]

Calculate the difference

[tex]\triangle GPE = 1000J - 0J[/tex]

[tex]\triangle GPE = 1000J[/tex]

Hence, it increases by 1000 joules