A concrete block of mass 35kg is pulled along a horizontal floor with the aid of a rope inclined at an angle of 30⁰ to the horizontal. If the coefficient of friction is 0.75, Calculate the force required to move the block( g = 10 ms⁻²)

A. 401.5 N
B. 226.5 N
C. 211.5 N
D. 245. 7N​

Answer:

3 m/s2

Explanation:

Took the test

The maximum torque on wire is 0.12 x [tex]10^{-3}[/tex] N-m.

We have current carrying wire in a form of a circle placed in a uniform magnetic field.

We have to find the maximum torque on the wire.

The torque on a wire placed in a uniform magnetic field is given by -

[tex]$\tau = IAB\;sin\theta[/tex]

According to the question, we have -

Diameter of wire (D) = 10 cm

Therefore -

Radius of wire (r) = 5 cm = 1/20 meter.

Magnetic field (B) = 3 mT = 3 x [tex]10^{-3}[/tex] T

I = 5 A

Using the formula for torque -

[tex]$\tau = IAB\;sin\theta[/tex]

For maximum torque -

[tex]\theta[/tex] = 90

Therefore -

[tex]$\tau = IAB[/tex] =  5 x 3.14 x [tex]\frac{1}{20}[/tex] x [tex]\frac{1}{20}[/tex] x 3 x [tex]10^{-3}[/tex] = 0.12 x [tex]10^{-3}[/tex] N-m.

Hence, the maximum torque on wire is 0.12 x [tex]10^{-3}[/tex] N-m.

To solve more questions on Torque on wire, visit the link below-

https://brainly.com/question/13111267

#SPJ4

12.00 min = 0.2 hr

8.00 min = 0.15 hr

Total distance:

(10.0 km/hr) (0.2 hr) + (15.0 km/hr) (0.15 hr) + (20.0 km/hr) (0.2 hr)

= 8.25 km

Average speed:

(10.0 km/hr + 15.0 km/hr + 20.0 km/hr) / 3

= 15 km/hr

Change in position:

(10.0 km/hr) (0.2 hr) + (15.0 km/hr) (0.15 hr) - (20.0 km/hr) (0.2 hr)

= 0.25 km

Average velocity:

(10.0 km/hr + 15.0 km/hr - 20.0 km/hr) / 3

≈ 1.67 m/s

A parallel beam of * particles with fixed kinetic energy is normally incident on a piece of gold foil. (a) if 100 * particles per minute are detected at 20, 20 will be counted at 40, 60, 80, and 100.

In physical science, the dynamic energy of an article is the energy that it has because of its movement. It is characterized as need might have arisen to speed up a body of a given mass from rest to its expressed speed. Active energy is the development energy of an item. Active energy can be moved among objects and changed into different sorts of energy. Nonetheless, it isn't impacted by the climate beyond the article or framework, like air or level. Then again, motor energy is the energy of an item or a framework's particles moving. In spite of expected energy, the dynamic energy of an article is comparative with other fixed and moving items present in its nearby climate.

Learn more about kinetic energy, refer:

https://brainly.com/question/21900274

#SPJ4

Answer:

winter

Explanation:

winter because the sun is not reaching the nothern hemisphere directly so the season inthe nothern hemisphere is winter.

and also it cannot be autumn because autumn is a season for leaves falling.

and also it cannot be spring because spring is the season for growth.

and also it cannot be summer because sumer is the season for the sun rays reaching directly on the earth.

HOPE THIS HELPS.

Answer:

The distance he moved the soil is 32.97 m.

Explanation:

Given;

force exerted on the wheelbarrow, F = 185 N

work done in moving the soil, w = 6.1 kJ = 6100

The work done in moving the soil is given as;

Work done = force x distance he moved the soil

W = F x d

d = W / F

d = (6100) / (185)

d = 32.97 m

Therefore, the distance he moved the soil is 32.97 m.

Answer: 2.2 x 10^21

Explanation:

Kelvin (K)

The kelvin (K) is the base unit for temperature of the SI. Kelvin is called the absolute temperature scale because it does not use degrees.

Answer:

An anode is an electrode through which conventional current (positive charge) flows into the device from the external circuit, while a cathode is an electrode through which conventional current flows out of the device.

Explanation:

Answer:

I can not see the image, so i will answer in a general way.

As you know, the sound behaves like a wave, this means that the sound needs some time to cover a given distance. An example of this motion can be seen when you drop a little stone in water, and you can see how the waves expand.

This means that the one who will hear the sound first, will be always the one that is closer to the source of the sound, in this case, the sound comes from the ball hitting the backboard, then the one who is closer to the backboard will hear the sound first.

Answer:

The change in momentum of the car is 3575 Kg.m/s

Explanation:

Impulse and Momentum

The impulse (J) experienced by the object equals the change in momentum of the object (Δp).

The formula that represents the above statement is:

J = Δp

The impulse is calculated as

J = F.t

Where F is the applied force and t is the time.

The car hits a wall with a force of F=6500 N and stops in 0.55 s. Thus, the impulse is:

J = 6500 * 0.55

J = 3575 Kg.m/s

The change in momentum of the car is:

[tex]\Delta p= J = 3575\ Kg.m/s[/tex]

The change in momentum of the car is 3575 Kg.m/s

Michelson-Morley experiment helped present-day scientists by explaining how light travels through space and time.

This is referred to as a procedure which is carried out by scientists in other support or refute a hypothesis and an example of such is the Michelson-Morley experiment which helped explain some properties of light.

This experiment was able to explain how light travels in different media and the velocity in which such occurs. It was also discovered that light has a constant speed of light which helped to establish different mathematical relationships between various parameters and helped  present-day scientists discover more.

Read more about Light here https://brainly.com/question/166544

#SPJ1

The correct answer is option A: Has varying acceleration

An object is undergoing simple harmonic motion. Throughout a complete cycle, it has varying acceleration.

In Physics, simple harmonic motion(SHM) refers to the periodic motion or back-and-forth movement of a particle through a central position or equilibrium point.

In SHM, the maximum position of the particle on one side is equal to the extreme displacement of the particle on the opposite side.

To put it simply, SHM is a type of motion in which the object moves along a straight line having a particular acceleration proportional to the displacement and its direction is always towards the central fixed position i.e O.

If you need to learn more about the simple harmonic motion click here:

https://brainly.com/question/20885248

#SPJ4

Answer:

anti-lock braking system

Explanation:

The charge on each balloon is 100nC or 1.2 × 10^-7 C

Consider two balloons of diameter 0.200m each with a mass of 1.00g hanging apart with 0.0500m separation on the ends of string making angles of 10.0° with the vertical.

The charge on each balloon can be found from

[tex]F_{e} = \frac{k_{e}q^{2} }{r^{2}} \\q = \sqrt{\frac{k_{e}q^{2} }{r^{2}}} \\\\q = \sqrt{\frac{(2\times10^{-3N}(0.25m)^{2}}{8.99\times10^{9}N\cdotm^{2}/C^{2}}\\[/tex]

[tex]q = 1.2\times10^{-7}C[/tex] or 100nC

An electric charge is the property of matter where it has more or fewer electrons than protons in its atoms. Electrons carry a negative charge and protons carry a positive charge. The matter is positively charged if it contains more protons than electrons and negatively charged if it contains more electrons than protons.

Learn more about the charge here:

https://brainly.com/question/14713274

#SPJ4

Answer:

Answer choice D!

Explanation:

When it comes to running during a hot day, the human body responds to extensive periods of heat by producing sweat. Sweat is necessary in order of cooling down the body, so that is why I figured it would be that answer. I hope this helped!

At extreme pressure, the volume of the real gas will be more compared to the prediction of the ideal gas law.

Ideal Gas Law gives PV = nRT, where

P - pressure of the gas

V - Volume of the gas

R - Gas constant

T- Temperature

n - number of particles

It says that high pressure decreases the volume of the gas occupied.

But ideal gas law fails for real gases. In the case of real gases, the gas molecules interact together and gives rise to its volume when high pressure is applied. The assumptions of Ideal gas law includes that the particles should not be able to interact with each other and it doesn't work at low temperature and high pressure.

So for real gases, extreme pressure increases the volume of the gas which does not agree with the prediction of ideal gas law.

Learn more about ideal gas law at https://brainly.com/question/15882021

#SPJ4

Answer:

Force of the ball against the bat

Explanation:

Newton's third law of motion states that for every action, there is an equal and opposite reaction. When a player hits a ball with a bat, the force the player exerted on the ball through the bat gave the ball a push force in the forward direction. This is an action force. Now that an action has been initiated, there must be a reaction according to Newton's third law of motion. The magnitude of the force on the ball equals the magnitude of the force on the bat. The direction of the force on the ball is opposite to the direction of the force on the ball. The ball will give the bat an equal and opposite force trying to push the bat backward by resisting the impact of the bat. This is the reaction. The ball will only move if the applied force is able to overcome the resisting force by the bat

Where;

is the action force of the bat against the ball.

is the equal and opposite reaction force of the ball towards the ball.

Answer:

The traffic light pulling upward on earth with a 1500 N force.

Explanation:

The sound level of the sound wave due to the ambulance is 140.

In terms of physics, the sound is a vibration that travels through a transmission medium like a gas, liquid, or solid as an acoustic wave. Sound is the reception of these waves and the brain's perception of them in terms of human physiology and psychology. Only acoustic waves with frequencies between roughly 20 Hz and 20 kHz, or the audio frequency range, can cause a human to have an auditory sensation. These are sound waves with wavelengths ranging from 17 meters (56 ft) to 1.7 millimeters in the air at atmospheric pressure (0.67 in). Ultrasounds are sound waves with a frequency higher than 20 kHz that are inaudible to humans. Infrasound refers to sound frequencies below 20 Hz. Animals of different species have different hearing ranges.

To learn more about sound, Visit:

https://brainly.com/question/9349349

#SPJ4

The distance required is 278.8 cm.

The speed is defined as the ratio of the distance covered to the time taken. Speed is a scalar quantity and the direction of the speed is not considered in the calculation.

We have the following information;

Speed of the car = 68.0 cm/s

Time taken = 4.10 seconds.

Speed = distance / time

distance = speed * time

distance = 68.0 cm/s *  4.10 seconds

Distance = 278.8 cm

Learn more about speed:https://brainly.com/question/28224010

#SPJ1

Answer:

Steel

Explanation:

Sound waves travel over 17 times faster through steel than through air.

Answer:

Steel

Explanation:

This is because solid objects molecules are more packed together, therefore it travels faster, in which time oxygen by 17 times faster

Answer: the answer is 3.200×107  ​h

Explanation:

here's proof, honestly had no idea either so i just guessed, but hope this helps!

Answer: 5.8 m/s squared

Explanation: just got that question lol

If the meteoroid survives the impact, the Mach angle of the shock wave in water is 4.40°.

The square root of the proportion between the elastic force and the inertia force of a flowing fluid is known as the Mach number. Mach Angle (M) = The Mach Number (M). It is described as the Mach cone's halved angle.

A huge meteoroid travels at a speed of v (object) = 20.0 km/s as it enters the atmosphere and does not experience much braking before hitting the water.

Now,

v(object) = 20 km/s =20 × 10³ m/s

The speed of sound in seawater is:

v(sound) = 1533 m/s

The Mach angle in seawater is given as:

θ = sin⁻¹ ( v(sound) / v(object) )

θ = sin⁻¹ ( 1533 / 20 × 10³ )

θ = 4.40°

Learn more about angle here:

https://brainly.com/question/24775470

#SPJ3