A 900 kg car moves around a 500 m radius curve at 25.0 m/s. What is the centripetal force on
the car?

Answer:

B

Explanation:

F=m×g

=7.50×9.8 (standard gravitational force of earth)

=73.5N

The correct option is (b) 73.5N.

F= 7.50 kg is given in this question .

So, we apply formula

                            F=m×g

                           =7.50×9.8          (g= 9.8standard gravitational force of earth)

                            =73.5N

Therefore, The tension on a rope holding up is 73.5N .

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Answer:

Water potential is the potential energy of water per unit volume relative to pure water in reference conditions. Water potential quantifies the tendency of water to move from one area to another due to osmosis, gravity, mechanical pressure and matrix effects such as capillary action.

Answer:

water potential is the potential energy of the water per unit volume.

Answer: A Punnett square can be used to predict genotype and phenotypes of offspring from genetic crosses. ... In the P generation, one parent has a dominant yellow phenotype and the genotype YY, and the other parent has the recessive green phenotype and the genotype yy.

Explanation:

When the electron is moved toward the positive plate, the electrostatic force increases causing the electron to be attracted to the positive plate.

The electrostatic force is the force tat acts between two charges. The nature of this force is described by the Coulumb law.

When the electron is moved toward the positive plate, the electrostatic force increases causing the electron to be attracted to the positive plate.

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Answer:

Switching power plants, for example, from coal-burning to gas-burning can significantly reduce emissions. Equip fossil fuel plants with carbon capture and storage technology. ... Although it doesn't exactly reduce emissions, carbon capture technology does prevent emissions from reaching the atmosphere.

Answer:

Tetherball is an interesting game in which two players tries to hit the ball hard so that it goes around the

pole.Each time the player hits the ball, it's orbit rises higher off the ground.Let's understand the physics

behind this.The motion of a tetherball is governed by two forces.These two forces combine to generate a

net force, i.e. centripetal force.If the ball is moving more quickly, it requires a greater centripetal force,

which in turn requires a greater tension force.Since the ball's weight hasn't changed, the angle of the

tension force changes until the ball is in vertical equilibrium.

To access this physics simulation visit: http://goo.gl/xVdwgO Page 02Exploration Series www.ck12.org

Ball Mass : This slider controls the mass of the ball. A ball with more mass will have more inertia, requiring

a greater net force to accelerate it. A ball with more mass will ALSO have a greater gravitational force

acting on it. Watch both of these effects occur when you manipulate this slider.

Cable Length : This slider controls the length of the cable. A longer cable is capable of allowing a greater

circular radius of motion for the ball. It is important to remember that the radius of the circular motion is

NOT equal to the length of the cable. Instead, if you want to understand the size of the circle of the ball's

motion, ignore the cable and just imagine the path of the ball.

Ball Speed : This slider controls the speed of the ball - imagine a kid just hit the ball and it sped up. A ball

moving more quickly is also accelerating more quickly because its velocity is changing as it moves in a

circle (remember that changes in DIRECTION of velocity 'count' as changes to velocity).

Force Diagram : This allows you to turn on or off the diagram of the forces acting on the ball. Look for the

ball to be in vertical force balance, which means the vertical component of tension is canceled by the

gravitational force. The ball should NOT be in horizontal force balance - it is accelerating towards the center

of the circle! It is important to note that this free body diagram should really be moving with the ball so that

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the tension force always points along the cord - we are just showing the forces at the moment the ball is at

the furthest-right on this screen.

Centripetal force vs Tetherball speed : This is a plot of centripetal force required to keep the ball in

circular orbit about the pole as a function of its speed. As expected, a more quickly-moving ball is changing

in velocity more often in a given amount of time, and so is accelerating more. This greater (centripetal, or

center-pointing) acceleration requires a greater net force.

Explanation:

Answer:

a) Yes

b) No

Explanation:

In the first case, part a, yes we can say for certainty that cylinderical symmetry holds. Why so? You may ask. This is because from the question, we are told that the length of the rod is 300 cm. And this said length is longer than the distance to the point from the center of the rod, which is 5 cm.

In the second half of the question, I beg to disagree that cylindrical symmetry holds. Again, you may ask why, this is because the length of the rod in this case, is having the same order of magnitude as the distance to the center of the rod. Thus, it is not symmetrical.

Answer:

All planets including the outer larger planets were formed at the same time somewhere around 4.5 Billion years ago.

Explanation:

the young sun drove away most of the gas from the inner solar system, leaving behind the rocky cores also known as the terrestrial planets.

Answer:

a. The length of the solenoid wire is approximately 131.95 m

b. The inductance of the solenoid is approximately 2.078 × 10⁻³ H

c. The length of the solenoid is 0.84  m

d. The current after three time constants have elapsed is approximately 456.1 A

Explanation:

The given parameters are;

The number of turns in the solenoid, N = 4,200 turns

The diameter of the wire, d = 0.200 mm

The diameter of the solenoid, D = 1.00 cm

The voltage of the battery connected to the solenoid, V = 12.0 V

The current increase = 155 mA

The time for the increase = 1.50 millisecond

The internal resistance of the battery is negligible

a. The length of wire needed to form the solenoid, l = π·D·N

∴ l = π × 0.01 × 4,200 ≈ 131.95

The length of the solenoid, l ≈ 131.95 m

b. The inductance, 'L', of the solenoid is given as follows;

[tex]L = \dfrac{\mu_0 \cdot N^2 \cdot A}{l}[/tex]

Where;

μ₀ = 12.6 × 10⁻⁷ H/m

N² = 4,200²

A = The cross sectional area of the solenoid = π·D²/4

l = Length of the solenoid = d × N = 0.0002 m × 4,200 = 0.84  m

∴ L = (12.6 × 10⁻⁷ × 4,200² × 0.01² × π/4)/0.84 ≈ 0.002078 = 2.078 × 10⁻³

The inductance, L ≈ 2.078 × 10⁻³ H

c.) The length of the solenoid = d × N = 0.0002 m × 4,200 = 0.84  m

The length of the solenoid = 0.84  m

d. The current after three time constant

 We have;

∈ = -L × di/dt

di/dt = 155 mA/1.5 ms = 103.[tex]\overline 3[/tex] A/s

∈ = 103.[tex]\overline 3[/tex] A/s × 2.078 × 10⁻³ H = 0.21472[tex]\overline 6[/tex] V

We have;

[tex]\tau = \dfrac{t}{\left(ln\dfrac{1}{1-\dfrac{Change}{Final-Start} } \right)}[/tex]

The change in voltage = 0.21472[tex]\overline 6[/tex] V

The start voltage = 0 V

The final voltage = 12.0 V

t = 1.5 ms = 0.0015 s

We get;

[tex]\tau = \dfrac{0.0015}{\left(ln\dfrac{1}{1-\dfrac{0.21472\overline 6}{12-0} } \right)} \approx 8.3076\times 10^{-2}[/tex]

τ = L/R

Therefore,

R = L/τ =

The resistance = 2.078 × 10⁻³/(8.3076×10⁻²) = 0.0250

The resistance = 0.0250 Ω

[tex]I= \dfrac{V}{R} \cdot \left(1 - e^{-\dfrac{t}{\tau} }\right)[/tex]

Therefore, after three time constants, we have;

∴ I = (12.0/(0.0250)) × (1 - e⁻³) ≈ 456.1

The current after three time constants have elapsed, I ≈ 456.1 A.

Answer:

atoms cannot go bad

Explanation:

Because they stay alive and get good nutriants

Answer:  Work = change in energy which can be calculated by force * displacement so taking this we can multiply 350n by *2m and we can come out with 700 joules

Explanation: I Hope This Helps I'm new at this.

Answer:

I don't know but you got this!!

Answer:

Same as before.

Explanation:

we can use momentum conservation to solve the problem.

Let mass of child be m and of the sled be M. Also let both have initial velocity u.

since, child fells off on the sled it will still have same velocity of ''u''.

By momentum conservation we have,

(M + m) x u = m x u + M x v

⇒ Mu=Mv

⇒ u=v

Hence, velocity of the sled remains the same.

Answer:

Tie aluminium foil on each end of the battery using rubber band, then use copper wire to attach the led to the aluminium foil...... probably would work

Answer:

Resistance = 0.22 Ohms

Current = 13.63636 A

Explanation:

Total resistance for resistors in parallel is given by:

[tex]\frac{1}{T} =\frac{1}{R1} +\frac{1}{R2} +...+\frac{1}{Rn}[/tex] where n is the number of resistors

[tex]\frac{1}{T} = \frac{1}{1.1} +\frac{1}{1.1} +\frac{1}{1.1} +\frac{1}{1.1} +\frac{1}{1.1}[/tex]

if you solve that you get [tex]\frac{1}{T} = 5/1.1 \\\\T = 1.1/5T = 0.22 Ohms[/tex]

Solve current using V=IR

I=V/R =

I=3/0.22

I = 13.63636 A

Answer:

[tex]\pi 1 = \frac{h}{l}[/tex]

[tex]\pi 2 =[/tex] б / [tex]l^2gp[/tex]

[tex]\frac{h}{l} =[/tex] Ф ( б / [tex]l^2gp[/tex] )

Explanation:

Develop a suitable set of dimensionless parameters for this problem

The set of dimensionless parameters for this problem is :

[tex]\pi 1 = \frac{h}{l}[/tex]

[tex]\pi 2 =[/tex] б / [tex]l^2gp[/tex]

[tex]\frac{h}{l} =[/tex] Ф ( б / [tex]l^2gp[/tex] )

and they are using the pi theorem, MLT systems

attached below is a detailed solution

Answer: 4.0·10^-8 N

Explanation: both forces are negative so force is repulsive

F = k q1·q2 /r². K = Coulomb's constant 9·10^ 9 Nm²/C².

Both Charges are -1.6·10^-10 C and r= 0.076 m

Answer:

a) The frequency of the waves are = 2 Hz (since you are making two pulses every second)

b)The period of the waves is 0.19 m (as the consecutive crests are separated by 0.19 m)

c) V = L x f

v = 0.19 m x 2 S-1 (Hz is actually per second)

v = 0.38 ms-1

pe nis

Answer:

Both are only physical changes

Explanation:

A physical change is a change that does not involve or alter the chemical composition of the substances involved. Physical changes form no new substance and can be easily separated into individual constituents. Example of physical changes are change in state, boiling, melting etc.

According to this question, two processes were given as follows:

1. mixing chocolate syrup into milk

2. rain forming in a cloud

These two processes are similar in the sense that they are both examples of physical changes.

Answer:

2) τ = F x  torque increases, 3) troque decreases,

4)  man approaches the pivot and the child must move away

5)  Σ τ = 0

Explanation:

2) when the man moves away from the pivot his torque increases significantly, since his distance increases

                 τ = F x

                 τ = m g x

therefore the system rotates faster

3) when the child approaches the pivot, his troque decreases, because the distance decreases

                 τ = f x

therefore the system must spin slower

4) If we place the man and the child on the side of a scale, the movement must be the man approaches the pivot and the child must move away, so that the torque is the same and the system can reach a balance

5) the rotational equilibrium expression

                 Σ τ = 0

is the one that describes the equilibrium of a system with several forces

Following are the solution to the given points:

For question 2:

           [tex]\to W_2\times d_2=80\times 5=300\ units[/tex]

For question 3:

             [tex]\to W_1\times d_1=30\times 6=180 \ units[/tex]

For questions 4 and 5:

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Answer:

4.4pF

Explanation:

the capacitance of the circuit required for reception is given:

wL =  [tex]\frac{1}{wC}[/tex]

w = 2π [tex]f[/tex]

Using both equation

Capacitance is given

C =   1 - 4π2  f2 L

1- 4×9.8969×144×10 10 ×0.004

​=4.4pF

​

​

Answer:

B = 423.64 N

Explanation:

The thrust force in a fluid is equal to the weight of the displaced fluid,

         B = ρ g V

where the density is that of air ρ=1.29 kg / m³ and the volume of the spherical balloon is

          V = [tex]\frac{4}{3} \pi r^3[/tex]

          v = 4/3 π 2³

          V = 33.51 m³

let's calculate the thrust

          B = 1.29  9.8  33.51

          B = 423.64 N

Weight  is directly proportional to the acceleration of gravity wherever you happen to be at the moment.

If the backpack weighs 300 lb on Earth, and you take it to a place where gravity is 37.9% of Earth's gravity, then the backpack will weigh

(37.9%) x (300 lb)

(0.379) x (300 lb)

That's 113.7 lb.

Answer:

1.243 mph

Explanation:

Answer:

C. Planet D has the greatest mass and will exert a greater gravitational force

Answer:i

Explanation:∩

Answer:

b

Explanation:

the more heat the hotel it get which cause more heat

Answer: C. Entropy

Explanation: a pex :)