A 100-kg block being released from rest from a height of 1.0 m. It then takes it 1.40 s to reach the floor. What is the mass m of the other block

Answer:

Opposite

Explanation:

Waves that hit a fixed boundary return to the starting point on the opposite side that it began.

After striking, the wave gets reflected and it moves in the direction opposite to the initial direction.

Hence, it would mean that waves that hit a fixed boundary return to the starting point on the opposite direction.

Answer:

9.807 m/s²

Explanation:

PLS make me brainliest

Answer:

[tex]\huge\boxed{\sf 9.8 \ m/s^2}[/tex]

Explanation:

The acceleration due to gravity is g the value of which is 9.8 m/s².

[tex]\rule[225]{225}{2}[/tex]

Hope this helped!

hhhhuuuxuuuudddddddddddd

Answer:

lol

Explanation:

lolllll i need points sorry

Explanation:

Yes, it is possible to have zero speed while accelerating, but only for a moment. ... acceleration is the rate at which the speed and direction of an object changes over time, so whenever an object goes through zero speed while reversing directions, it has non-acceleration. zero but a speed of zero.

Answer:

Explanation:

The magnitude of the force on the box can be found by using the formula

[tex]f = \frac{w}{d} \\ [/tex]

w is the workdone

d is the distance

From the question we have

[tex]f = \frac{80}{8} \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

10

Explanation:

80 divided 8 =10

Answer:

a = v²/r

Explanation:

The acceleration of a body moving in a circular path is known as the centripetal acceleration. This is the acceleration of a body that keeps the body within the circular path. It is written in terms of the linear velocity v and the radius of the circle of rotation as shown;

a = v²/r where

v is the linear velocity

r is the radius

a is the centripetal acceleration

Answer:

A). 2.3 s

Explanation:

Given that,

Length of the string = 130cm or 1.3 m

g near Earth's surface = 9.8 [tex]ms^{-2}[/tex]

To determine the period of a pendulum near Earth’s surface;

T = 2 π [tex]\sqrt{\frac{L}{g} }[/tex]

T = 2π[tex]\sqrt{\frac{1.3}{9.8} }[/tex]

T = 2.3 sec

Therefore, the period of the pendulum near the earth's surface is 2.3 sec.

Answer:

q1: 0.5m/s2

Explanation:

Answer:

A) 7kg

B) 0.044

Explanation:

a) Accordimg to Newton's second law

\sum F = ma

Fm - Ff = ma

Fm is moving force =15-5 = 10N

Ff is fictional force = 3N

m is the mass = ?

a Is the acceleration = 1m/s²

Substitute

10-3 = 1m

7 = m

Hence the mass of the body is 7kg

b) coefficient of friction is expressed as;

n = Ff/R

R is the reaction = mg

n =Ff/mg

Substitute

n = 3/7(9.8)

n = 3/68.6

n = 0.044

Hence the coefficient of friction is 0.044

Answer:

The value is  [tex]v = 23.6 \ m/s[/tex]

Explanation:

From the question we are told that

   The velocity is [tex]u = 13 \ m/s[/tex]

    The  length of the slope is [tex]l = 460 \ m[/tex]

    The height of the slope is [tex]h = 30 \ m[/tex]

     The mass of the cyclist and her bicycle is [tex]m = 70 \ kg[/tex]

   The drag force is  [tex]F = 15 \ N[/tex]

Generally from the law of energy conservation we have that

      [tex]PE + KE_t = W * KE_b[/tex]

Here [tex]PE[/tex] is the potential energy at the top of the slope which is mathematically represented as

       [tex]PE = m* g * h[/tex]

=>     [tex]PE = 70 * 9.8 * 30[/tex]  

=>     [tex]PE = 20580 \ J[/tex]

and   [tex]KE_t[/tex] is the kinetic energy at the top of the slope which is mathematically represented as

        [tex]KE_t = \frac{1}{2} * m * u^2[/tex]

=>     [tex]KE_t = \frac{1}{2} * 70 * 13^2[/tex]

=>     [tex]KE_t = 5915 \ J[/tex]

And  W is the work done by the bicycle which is mathematically represented as

       [tex]W = F * l[/tex]

=>     [tex]W = 15 * 460[/tex]

=>     [tex]W = 6900 \ J[/tex]

and [tex]KE_b[/tex] is the kinetic energy at the bottom of the slope which is mathematically represented as

       [tex]KE_b = \frac{1}{2} * m * v^2[/tex]

=>    [tex]KE_b = \frac{1}{2} * 70 * v^2[/tex]

=>    [tex]KE_b = 35 v^2[/tex]

So

       [tex]20580 + 5915 = 6900 + 35 v^2[/tex]

=>    [tex]v = 23.6 \ m/s[/tex]

Answer:

The efficiency of the engine is 40 %

Explanation:

Given;

input energy, = 2500 J

output energy, = 1000 J

The efficiency of the engine is given as;

Efficiency = output energy / input energy

Efficiency = 1000 / 2500

Efficiency = 0.4

Efficiency(%) = 0.4 x 100%

Efficiency = 40 %

Therefore, the efficiency of the engine is 40 %

The efficiency of Engine is 40%.

Given data:

The amount of heat absorbed by gasoline engine is, Q = 2500 J.

The mechanical work performed by Engine is, W = 1000 J.

The tendency to do work is often rated and measured using the concept of efficiency of Engine. It is expressed as the ratio of work obtained and amount of heat supply. So, the expression for the efficiency of Engine is given as,

[tex]\eta = \dfrac{W}{Q}[/tex]

Solving as,

[tex]\eta = \dfrac{1000}{2500}\\\\\eta =0.4\\\\\eta = 0.4 \times 100\\\\\eta =40 \%[/tex]

Thus, we can conclude that the efficiency of Engine is 40%.

Learn more about the Efficiency of Engine here:

https://brainly.com/question/24244446

Answer:

because the cohesive forces within the drops are stronger than the adhesive forces between the drops and the wax. Water wets glass and spreads out on it because the adhesive forces between the liquid and the glass are stronger than the cohesive forces within the water.

Answer:

the adhesive forces between the drops are stronger than cohesive force between the liquid

Answer:

[tex]0.75623\ \text{kN/m}[/tex]

[tex]55.6\ \text{cm}[/tex]

Explanation:

m = Mass of object = 7.94 kg

g = Acceleration due to gravity = [tex]9.81\ \text{m/s}^2[/tex]

x = Change in length of the spring = [tex](42.4-32.1)\ \text{cm}[/tex]

F = Force on the spring

Force of gravity on the object and the force on the spring will be equal

[tex]mg=kx\\\Rightarrow k=\dfrac{mg}{x}\\\Rightarrow k=\dfrac{7.94\times 9.81}{0.424-0.321}\\\Rightarrow k=756.23\ \text{N/m}[/tex]

The spring constant is [tex]756.23\ \text{N/m}=0.75623\ \text{kN/m}[/tex]

F = 178 N

Force on spring is given by

[tex]F=kx\\\Rightarrow x=\dfrac{F}{k}\\\Rightarrow x=\dfrac{178}{756.23}\\\Rightarrow x=0.235\ \text{m}=23.5\ \text{cm}[/tex]

The length of the spring will be [tex]32.1+23.5=55.6\ \text{cm}[/tex].

Answer: it’s actually C, electrical to magnetic

Explanation:

Answer:

8N and 32N

Explanation:

Given that a  light board, 10 m long, is supported by two sawhorses, one at one edge of the board and a second at the midpoint. A small 40-N weight is placed between the two sawhorses, 3.0 m from the edge and 2.0 m from the center.

To calculate the forces that are exerted by the sawhorses on the board, we must consider the equilibrium of forces acting on the board.

Let the two upward forces produce by the saw horses be P1 and P2

Assuming that the weight is negligible

Sum of the upward forces = sum of the downward forces.

P1 + P2 = 40 ....... (1)

Also, the sum of the clockwise moment = sum of the anticlockwise moments.

Let's assume that the board is uniform. The weight will act at the centre.

Taking moment at the centre:

P1 × 5 + 40 × 2 = 0

P1 = 40 / 5

P1 = 8N

Substitute P1 into equation 1

8 + P2 = 40

P2 = 40 - 8

P2 = 32N

Answer:

56

Explanation:

Answer:

The angle from vertical of the axis of the second polarizing filter is 50.57⁰.

Explanation:

Given;

intensity of the unpolarized light, I₀ = 300 W/m²

intensity of emergent polarized light, I = 121 W/m²

let the angle from vertical of the axis of the second polarizing filter = θ

Apply Malus's law, intensity of emergent polarized light is given as;

I = I₀Cos²θ

[tex]Cos^2 \theta = \frac{I}{I_o} \\\\Cos^2 \theta =\frac{121}{300} \\\\Cos^2 \theta =0.4033\\\\Cos \theta = \sqrt{0.4033} \\\\Cos \theta = 0.6351\\\\\theta = Cos^{-1} (0.6351)\\\\\theta = 50.57 ^0[/tex]

Therefore, the angle from vertical of the axis of the second polarizing filter is 50.57⁰.

Answer:

Explanation:

Sure!

Cars do it all the time. Do you mean without some sort of guidance system, or some sort of computerized brain? That's getting a little tougher. It's possible I think, if you let some sort of timer turn it on.

Answer:

The north pole of an electromagnet placed in the center of a permanent magnet repels the north pole of the permanent magnet.

Explanation:

The commutator of the electric motor reverses the current in each half revolution to keep the torque, turning the coil in the same direction. This occurs as the north pole of the electromagnet nears the south pole of the permanent magnet, and the current reverses, which causes the poles of the magnets to repel.

Thus, the correct answer is "the north pole of an electromagnet placed in the center of a permanent magnet repels the north pole of the permanent magnet".

Answer:

The answer is D

Explanation:

Just took the test on Edge :)

Answer:the nucleus controls and regulates the activities of the cell

Explanation:trust me bro

Answer:

The nucleus controls and regulates the activities of the cell and carries the genes, structures that contain the hereditary information.

A)Linear motion

If there is not net force on the car, then by the Newton Second Law, the acceleration is zero, and the only valid option for zero acceleration is A).

Answer: no other source

Explanation:

The Earth gets energy from the sun which includes both heat and light and these are necessary for chemical reaction.

When the energy from the Sun gets to the Earth, they come as solar radiation and included in such solar radiation are infrared, invisible light, X-rays, ultraviolet light, radio waves, and gamma rays.

We should note that no other source is required for the Earth to get energy. The sun supplies it its energy.

Answer:

B.

Explanation:

Answer:

Pulley = Flag Pole

Screw = Side latch

Wedge = Scissors

Wheel and axle = Car

Answer:

half the weight depending on planet gravitational force. weight wouldn't change though if gravitational force is strong

Explanation:

Answer:

As frequency increases, wavelength decreases

Explanation:

Both quantities are inversely proportional

Answer:

The mass of first body is double, since mass is double.

This is due to momentum

The same net force is applied to two bodies. The first body acquires half of the acceleration of the second body. The mass of first body is double, since mass is double.

In Newtonian physics, an object's mass and velocity are combined to form momentum, more precisely linear momentum and translational momentum. It has both a magnitude as well as a trajectory, making it a vector quantity. If an item has a mass of m and a velocity of v (also a vector quantity).

The kilogram metre per second (kg m/s), or newton-second inside the International System of Units (SI), is the unit used to measure momentum. The same net force is applied to two bodies. The first body acquires half of the acceleration of the second body. The mass of first body is double, since mass is double.

Therefore, the mass of first body is double, since mass is double.

To know more about momentum, here:

https://brainly.com/question/29598011

#SPJ6

Answer:

v = [tex]\sqrt{2gh}[/tex]

the speed in the two planes will be the same since it does not depend on the angle of the same

Explanation:

In this exercise we are told that the two inclined planes have no friction force, so we can apply the conservation of energy for each one, we will assume that the initial height in the two planes is the same

starting point. Highest part of each plane

         Em₀ = U = m g h

final point. Lowest part of each plane

        [tex]Em_{f}[/tex] = K = ½ m v²

as there is no friction, the mechanical energy is preserved

          Em₀ = Em_{f}

          mg h = ½ m v²

          v = [tex]\sqrt{2gh}[/tex]

As we can see, the speed in the two planes will be the same since it does not depend on the angle of the same

Answer:

1. far

2. a couple of seconds

3.  a mile or so

Explanation:

Answer:

875.59 N/m

Explanation:

From the question given above, the following data were obtained:

Force (F) = 10 lb

Extention (e) = 2 in

Spring constant (K) =?

Next, we shall convert 10 lb to Newton (N). This can be obtained as follow:

1 lb = 4.448 N

Therefore,

10 lb = 10 lb × 4.448 N / 1 lb

10 lb = 44.48 N

Thus, 10 lb is equivalent to 44.48 N

Next, we shall convert 2 in to metre (m). This can be obtained as follow:

1 in = 0.0254 m

Therefore,

2 in = 2 in × 0.0254 m / 1 in

2 in = 0.0508 m

Thus, 2 in is equivalent to 0.0508 m.

Finally, we shall determine the spring constant i.e the stiffness of the spring as follow:

Force (F) = 44.48 N

Extention (e) = 0.0508 m.

Spring constant (K) =?

F = Ke

44.48 = K × 0.0508

Divide both side by 0.0508

K = 44.48 / 0.0508

K = 875.59 N/m

Therefore the spring constant i.e the stiffness of the spring is 875.59 N/m