53. If the coefficient of kinetic friction, , between the block and the surface is 0.30 and the magnitude of the frictional force is 80.0 N, what is the weight of the block?A) 1.6 NB) 4.0 NC) 160 ND) 270 NE) 410 N

Answer:

The correct option is;

D. The nervous system signals smooth muscles in the blood vessels to contract to increase blood pressure

Explanation:

The contraction or relaxation of the vascular smooth muscles lead to the blood vessel volume change and blood pressure change such that the blood is redirected to regions of the body that requires instantaneous increased oxygen intake. As such the nervous system signals the blood vessel's vascular smooth muscle to contract, through vasoconstriction so as to raise the blood pressure, when the blood pressure is low.

Answer:

1,250 newtons

Explanation:

F=MA

first we find acceleration which is in other words "the change in velocity over time"

so we know it changes velocity in 4 seconds. the velocity increases by 5.

we shall now divide 5 by 4 which equals 1.25m/s/s

now we can solve the net force:

Fnet= (1.25m/s/s)(1,000kg)

so our net force is 1,250N

The golf ball has greater momentum compared to the baseball.

Momentum (p) is defined as the product of an object's mass (m) and its velocity (v). Mathematically, momentum can be expressed as:

p = m * v

Given that the mass of the golf ball is 0.045 kg and its velocity is 16 m/s, we can calculate its momentum:

Momentum of the golf ball = 0.045 kg * 16 m/s = 0.72 kg·m/s

On the other hand, the mass of the baseball is 0.14 kg and its velocity is 7 m/s. Let's calculate its momentum:

Momentum of the baseball = 0.14 kg * 7 m/s = 0.98 kg·m/s

Comparing the two momenta, we can see that the golf ball has a momentum of 0.72 kg·m/s, while the baseball has a momentum of 0.98 kg·m/s. Therefore, the baseball has a greater momentum compared to the golf ball. Momentum is a vector quantity that depends on both mass and velocity, so the greater mass of the baseball compensates for its lower velocity, resulting in a greater overall momentum.

To know more about momentum refer here:

https://brainly.com/question/30677308#

#SPJ11

The acceleration of the object is approximately 2.38 m/s². To find the acceleration of the object, we can use the formula:

acceleration = change in velocity / time

The object goes from rest to a speed of 10 m/s in 4.2 seconds, the change in velocity is:

change in velocity = final velocity - initial velocity

change in velocity = 10 m/s - 0 m/s

change in velocity = 10 m/s

Plugging the values into the formula, we have:

acceleration = change in velocity / time

acceleration = 10 m/s / 4.2 s

acceleration ≈ 2.38 m/s²

Therefore, the acceleration of the object is approximately 2.38 m/s².

Learn more about acceleration here:

https://brainly.com/question/2303856

#SPJ11

Answer:

it is quicker

Explanation:

Answer:

ummmmmmmm

Explanation:

this might be some type of trick question bro lol

or someone tryna play with you if the teacher gave you this question bro she deserves to be fired

Answer: the kinetic energy is equal to 125 Joules, or (1/2 * 10 kg) * 5 m/s2.

Explanation:

if a an object with a mass of 10 kg (m = 10 kg) is moving at a velocity of 5 meters per second (v = 5 m/s), the kinetic energy is equal to 125 Joules, or (1/2 * 10 kg) * 5 m/s2.

Answer:

The Kinetic energy of a 10Kg object moving with a speed of 5m/s is 125 Joules

Explanation:

Kinetic energy refers to the energy of a moving object. The formula for kinetic energy is given by

KE=(1/2)\(mv^{2}\).......(i)

, where, m⇒mass of object

             v⇒velocity

and the unit is given by Joules.

Now, as we are given in the question,

mass, m=10kg

velocity, v= 5m/s

Substituting these values in the equation (i), we get,

KE=(1/2)x(10Kg)x(5m/s)^2,

we have,

KE=125 J

Therefore, the kinetic energy of a 10 kg object moving with a speed of 5m/s is 125 Joules.

Read more about Kinetic energy on:

https://brainly.com/question/8101588

https://brainly.com/question/25959744

Answer:

Runner B

Explanation:

its just displacement over change in time

Answer:

Jwbsbsbdjeiskbsj3kabajj2jjj1jj2j2j3jkkkk3j3j2

The forces that act on the block that is at rest on the slope are:

A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

A force that holds an object at rest is called static friction. The definition of static friction is: The resistance people feel when they attempt to move a stationary object across a surface without actually causing any relative motion between their body and the surface they are moving the object across.

A contact force is a normal force. A normal force cannot be applied to two surfaces that are not in contact.

Read more on force here:https://brainly.com/question/388851

#SPJ1

question

A block is resting on an slope. (Figure 3) Which of the following forces act on the block?

Check all that apply.

weight

static friction

normal force

kinetic friction

Velocity of  first ball is -28m/s , and velocity of second ball is -4m/s.

Velocity is a vector quantity that describes the rate of change of an object's position. It is equal to the displacement of an object divided by the time interval over which the displacement occurred. Velocity has both magnitude and direction, and its units are typically meters per second (m/s). The velocity of an object can change over time due to acceleration, and if an object is moving in a circular path, it also has a component of velocity perpendicular to its direction of motion, known as centripetal velocity.

Given : Coefficient of restitution

\($e=\dfrac{2}{3}$Velocity of mass\)

\($$1 \mathrm{~kg}$ after the collision is given by \\\\$V_1=\dfrac{\left(m_1-e m_2\right) u_1+(1+e) m_2 u_2}{m_1+m_2}$\\Or $\quad V_1=\dfrac{\left(1-\frac{2}{3} \times 2\right) \times 12+\left(1+\frac{2}{3}\right) \times 2 \times(-24)}{1+2}=-28 \mathrm{~m} / \mathrm{s}$\\\)

\(Velocity of mass $2 \mathrm{~kg}$ after the collision is given by \\$V_2=\dfrac{\left(m-e m_1\right) u_2+(1+e) m_1 u_1}{m_1+m_2}$\\Or $\quad V_2=\dfrac{\left(2-\frac{2}{3} \times 1\right) \times(-24)+\left(1+\frac{2}{3}\right) \times 1 \times(12)}{1+2}=-4 \mathrm{~m} / \mathrm{s}$\)

To learn more about Velocity, click the given link,

brainly.com/question/25749514

#SPJ4

Answer:

C. answer pa brailest need lang po please

D. Resource Supply this would be directly affected first then the rest would follow after a period of time.

The reflecting surface is 1.5*105 kilometers away from the source. Since the wave reflected back, it meets the criteria for an echo according to the definition: v = 2d/t, v = 3*108, t = 1*10-3, 3*108 = 2d/(1*10-3), 2d = 3*108*1*10-3, d = 300000/2, and d = 1.5*105 km.

Velocity, as opposed to speed, refers to the pace and directions of an object's movements as it moves down a path. Unlike velocity, which is a vector, speed is a scalar quantity.

Velocity is the rate at which displacement changes. The pace upon which speed increases is referred as accelerator. Because it consists of both the magnitude and direction, velocity is an vector quantity. Since acceleration is merely the rate at which velocity changes, it too is a vector quantity.

To know more about Velocity visit:

https://brainly.com/question/18084516

#SPJ1

Answer: I think a

Explanation:

Answer:

True.

Explanation:

Total internal reflection is bound to occur when light travels from dense medium to less dense.

From the table given in the question above, we obtained:

Refractive Index of Crown glass = 1.52

Refractive Index of Asphalt = 1.635

From the above, Crown glass has a lower refractive index when compared to Asphalt. This means that Crown glass is less dense than Asphalt.

Therefore, total internal reflection will not occur when light travels from Crown glass to Asphalt because Crown glass is less dense than Asphalt.

The correct answer is v = (0.13716 k)1/2 m/s. The equation to calculate the velocity of the cylinder is given by:
v = (2 * k * x0)1/2

where:
v = velocity of the cylinder
k = spring constant
x0 = initial displacement of the spring

Therefore, the velocity of the cylinder can be calculated as follows:
v = (2 * k * 2.7 in.)1/2  
v = (2 * k * 0.06858 m)1/2  
v = (0.13716 k)1/2 m/s

Here you can learn more about the velocity

https://brainly.com/question/17127206#

#SPJ11

The frequency of an x-ray having a wavelength of 2.5×10⁻⁷ cm is 1.2×10¹⁷ Hz

We'll begin by converting the value of the wavelength from cm to m. Details below:

100 cm = 1 m

Therefore

2.5×10⁻⁷ cm = (2.5×10⁻⁷ cm × 1 m) / 100

2.5×10⁻⁷ cm = 2.5×10⁻⁹ m

Finally, we shall determine the frequency of the x-ray. This is shown below:

Velocity (v) = wavelength (λ) × frequency (f)

3×10⁸ = 2.5×10⁻⁹ × frequency

Divide both sides by 2.5×10⁻⁹

Frequency = 3×10⁸ / 2.5×10⁻⁹ m

Frequency = 1.2×10¹⁷ Hz

Thus, from the above calculation, we can conclude, the frequency is1.2×10¹⁷ Hz

Learn more about frequency:

https://brainly.com/question/15326129

#SPJ1

The current in the 5.00 ohm resistor is 0.052 A.

The induced emf in each metal rod is given by e = Blv, where B is the magnetic field strength, l is the length of the metal rod moving in the magnetic field, and v is the velocity of the rod. For the 10.0 ohm rod, the induced emf is e = (0.0100 T)(0.100 m)(4.00 m/s) = 0.00400 V. The current through the 10.0 ohm rod is then I1 = e/R1 = 0.000400 A.

For the 15.0 ohm rod, the induced emf is e = (0.0100 T)(0.100 m)(2.00 m/s) = 0.00200 V. The current through the 15.0 ohm rod is then I2 = e/R2 = 0.000133 A. Since the two rods are connected in series, the current through the 5.00 ohm resistor is the same as the current through the two rods: I = I1 + I2 = 0.000533 A.

Using Ohm's law, the voltage drop across the 5.00 ohm resistor is V = IR = (0.000533 A)(5.00 ohm) = 0.00266 V. Therefore, the current in the 5.00 ohm resistor is I = V/R = (0.00266 V)/(5.00 ohm) = 0.052 A.

To know more about the Parallel, here

https://brainly.com/question/31272540

#SPJ4

Answer: Heyaa! ~

State of the problem is that your friend routinely misses the school bus.

Explanation:

What are the causes for his missing the school bus:

Hopefully this helps you!

-Matthew ^^

Answer:

but the answer should be no as if 3 bulbs are connected together if one burns out the whole circuit will stop .hope you understood

please mark me as brainlist

Tension force, Friction and gravity are acting on acrobat player while hanging in middle.

Tension is a contact force that is transmitted via a rope, thread, wire, or other similar material when pressures on the opposing ends are pulling on it. For example, the rope holding a tire swing to a tree limb is strained. The rope is pulled upward by a branch that is fighting the rope's tug tension, which is merely a pulling force, while the rope is pulled downward by gravity. Pushing on a loose rope creates no strain. As a result, the force of tension must always be represented in the direction that the string is pulling the object in a free-body diagram.

To know more about  Tension force visit : https://brainly.com/question/13676406

#SPJ1

Answer:

the answer for your question is that they are unbalanced

Therefore, the potential difference across each resistor in this series circuit is 60V.

When resistors are connected in series, the total voltage across the combination is divided proportionally among the resistors based on their individual resistance values. To find the potential difference across each resistor in a series circuit, we can use the following formula:

Potential Difference = (Resistance / Total Resistance) × Total Voltage

Given:

Resistance of each resistor (R₁ and R₂) = 40 ohms

Total Voltage (V) = 120V

Since the resistors are connected in series, the total resistance (\(R_{Total}\)) is the sum of their individual resistances:

\(R_{Total}\) = R₁ + R₂

= 40 ohms + 40 ohms

= 80 ohms

Now we can calculate the potential difference across each resistor:

Potential Difference (V₁) = (R₁ / R₂) × V

= (40 ohms / 80 ohms) × 120V

= 60V

Potential Difference (V₂) = (R₂ / \(R_{Total}\)) × V

= (40 ohms / 80 ohms) × 120V

= 60V

Therefore, the potential difference across each resistor in this series circuit is 60V.

To know more about circuit:

https://brainly.com/question/29969678

#SPJ4

Answer:

the particles that heat up the gas become more active (vibrating around)

The given average distance of the Moon from the Earth is 384,000 km and the sidereal period of the moon is 27.3 days. We need to find the average orbital speed of the moon.So, we can use the formula to calculate the average orbital speed of the Moon as follows:

Average orbital speed (V) = distance/time.

To get the distance covered by the moon in one orbit, we will multiply the distance of the Moon from the Earth by the circumference of the orbit:

Distance = 2 × π × r = 2 × π × 384000 = 2.41 × 10^6 km.

Therefore, the average orbital speed of the Moon is given by the formula:V = Distance / Time periodV = 2.41 × 10^6 km / 27.3 days.

We need to convert the time period from days to seconds:1 day = 24 hours1 hour = 60 minutes1 minute = 60 seconds1 day = 24 × 60 × 60 seconds1 day = 86400 seconds.

Therefore, the time period is:27.3 days = 27.3 × 86400 seconds27.3 days = 2.36 × 10^6 seconds.

Substituting this value in the formula we get:V = 2.41 × 10^6 km / 2.36 × 10^6 secondsV = 1.02 km/s.

Therefore, the average orbital speed of the moon is 1.02 km/s.

Learn more about orbital speed here ;

https://brainly.com/question/581668

#SPJ11

The most likely source of the Apollo-Amor objects is the main asteroid belt located between the orbits of Mars and Jupiter.

Their unstable orbits are due to gravitational interactions with planets in the solar system, especially Jupiter, causing them to be continuously perturbed and evolve. The asteroid belt is a region of the solar system that lies between the orbits of Mars and Jupiter and is populated by a large number of small, rocky bodies called asteroids. The asteroid belt is estimated to contain millions of asteroids, ranging in size from tiny grains of dust to large bodies several hundred kilometers in diameter. The total mass of all the asteroids in the asteroid belt is estimated to be only about 4% of the mass of the Moon. The asteroid belt is believed to be the remnant of the early solar system when planets were forming from the gas and dust surrounding the young Sun. The gravitational influence of Jupiter prevented the formation of a planet in the region between Mars and Jupiter, leading to the formation of the asteroid belt instead. Asteroids in the asteroid belt can vary greatly in composition, depending on their location and history. Some asteroids are made mostly of rock and metal, while others contain more volatile materials such as water ice. Some asteroids in the asteroid belt are also believed to be the source of meteorites that occasionally fall to Earth.

Learn more about  asteroid belt here:

https://brainly.com/question/25531422

#SPJ11

The final speed of the car after the first 4.00 s of acceleration is 13.9 m/s. Therefore, option (b) is correct.

The given problem involves determining the final speed after the first 4 seconds of acceleration. Thus, it is safe to assume that the car accelerated uniformly from rest.

The initial velocity of the car, u = 0 km/hr = 0 m/s

Final velocity of the car, v = 100 km/hr = 27.8 m/s

Time, t = 8.00 s

Acceleration, a = ?

We know that the distance traveled by the car (S) during uniform acceleration can be calculated using the following equation:

S = ut + 1/2 at² ……………….(1)

where u = initial velocity, a = acceleration, t = time, and S = distance traveled.

Substituting the values in the above equation, we get:

100,000 = 0 + 1/2 a (8.00)²a

              = 3.47 m/s²

Now, to determine the final speed of the car after 4 seconds of acceleration, we use the following equation:

v = u + at ……………….(2)

where v = final velocity, u = initial velocity, a = acceleration, and t = time.

Substituting the values in equation (2), we get:

v = 0 + 3.47 m/s² (4.00 s)v

  = 13.9 m/s

learn more about acceleration from :

https://brainly.com/question/460763

#SPJ11

Answer:

i need help

Explanation:

The speed of the wind is 17 mph and the speed of the plane in still air is 119 mph.

Let the speed of the plane be x and the speed of the wind be y. Then, the speed of the plane with the wind becomes x + y, while the speed of the plane against the wind is x - y.

The distance traveled with the wind in 3 hours is 408 miles.

Therefore, we can write the equation as:

3(x + y) = 408

Divide both sides by 3:

x + y = 136  .... (1)

The distance traveled against the wind in 4 hours is also 408 miles.

Therefore, the equation can be written as:

4(x - y) = 408

Divide both sides by 4:

x - y = 102  .... (2)

Now we can solve these two equations using the elimination method.

Add equations (1) and (2):

x + y + x - y = 136 + 1022x = 238x = 119 mph

Therefore, the speed of the plane in still air is 119 mph.

Now, substitute this value of x in equation (1):

119 + y = 136y = 17 mph

Therefore, the speed of the wind is 17 mph.

Learn more about the speed at https://brainly.com/question/13943409

#SPJ11

The correct question is:

A plane flies 408 mi with the wind in 3 hr. The return trip takes 4 hr. What is the speed of the wind and the speed of the plane in still air?