Tech A says that when a fuse has blown, it just has to be replaced, because it performed its job. Tech B says that when a fuse has blown, the circuit has to be diagnosed because the fuse was probably not the problem. Who is correct

Explanation:

Acceleration is the change in velocity over change in time.

a = Δv / Δt

So it is the slope of the line of a velocity vs. time graph.

a = (10 m/s − 40 m/s) / (12 s − 0 s)

a = -2.5 m/s²

Answer:

a

Explanation:

............

..............option A

Answer:

A is the answer as electromagnetic and strong nuclear forces influence the interaction between charged particles within an atom the only difference being their intensity! Hope this helps :) and if you dont mind, mark me brainliest so i can get to the next rank :(

Answer: In places of hot climate it is advised that the outer wall of houses be painted white because white color reflects heat and the houses do not heat up too much.

Answer:

Leather Shoes, Microphones, Candles

Explanation:

Surprisingly, leather Shoes, Microphones, Candles were not mentioned in Stuff Matters a book written by Mark Miodownik which according to him explored "the marvelous things that shape our man-made world."

when object goes under acceleration

c).its velocity always increases

★ Acceleration: Rate of increase in velocity.

★ Velocity: Distance travelled by a body per unit time in given direction is called velocity .

Answer: velocity always increase

Explanation: Really dont need any explanation

Answer:

Bone homeostasis involves multiple but coordinated cellular and molecular events. Two main types of cells are responsible for bone metabolism: osteoblasts (which secrete new bone), and osteoclasts (which break bone down).

Explanation:

Explanation:

Power = work / time

Power = force × distance / time

P = (12 kg × 10 m/s²) (8 m) / (10 s)

P = 96 Watts

The average power used in raising the bucket against the gravitational force is equal to 94.08 W.

Power can be defined as the rate of doing work in unit time. The S.I. unit that is used to measure power is Watt (W) or Joule per second. Power can be described as the rate at which work is done.

Power = Work /time

Given, the mass of the bucket, m = 12 kg

The distance traveled by the bucket, d = 8 m

The work is done by the bucket, W = F.d

W = mg.d

W = 12 × 9.8 ×8

W = 940.8 J

Given, the time is taken by the bucket, t = 10 s

The power used in raising the bucket against the gravitational force:

P = W/t

P = 940.8/10

P = 94.08 W

Therefore, the average power is equal to 94.08 W.

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[tex] \bf \underline{ \underline{given : }}[/tex]

[tex]\bf \underline{ \underline{to \: be \: calculated : }}[/tex]

Calculate the distance covered by a kangaroo.

[tex]\bf \underline{ \underline{formula \: applied : }}[/tex]

[tex] \boxed{ \bf{Speed = \frac{Distance}{Time} }}[/tex]

[tex]\bf \underline{ \underline{Solution : }}[/tex]

We know that,

Speed = Distance/Time

=> Distance = Speed × Time

Substituting the values in the above formula,we get;

=> Distance = 18 × 192

=> Distance = 3456 m

Thus,the distance covered by a kangaroo is 3456 meters.

Answer:

Reaction force

Explanation:

According to Newton's third law of motion, for every action, there is an equal opposite reaction.

Hence the reaction force is often equal in magnitude to the applied force but acts in a direction opposite to the direction of the applied force.

Hence, when a baseball player, gets a hit, the ball exerts a reaction force on the player which is equal in magnitude to the force with which the player hits the ball but opposite in direction.

Answer:

True, yes terminal voltage of a battery can never be greater than the emf of the battery. Because due to internal resistance of the current terminal

Answer:

[tex]\boxed{\sf Position \ of \ the \ image = 6 \ cm}[/tex]

[tex]\boxed{\sf Nature \ of \ the \ image = Virtual \ and \ Erect}[/tex]

Given:

Object distance (u) = -10 cm

Focal length (f) = 15 cm

To Find:

Image distance (v) and nature of the image

Explanation:

Mirror Formula:

[tex]\boxed{\bold{\sf \frac{1}{v} + \frac{1}{u} = \frac{1}{f}}}[/tex]

Substituting values of u and f in the equation:

[tex]\sf \implies \frac{1}{v} -\frac{1}{10} =\frac{1}{15}[/tex]

[tex]\sf \implies \frac{1}{v}=\frac{1}{15} +\frac{1}{10}[/tex]

[tex]\sf \implies \frac{1}{v}=\frac{2}{30}+\frac{3}{30}[/tex]

[tex]\sf \implies \frac{1}{v}=\frac{2+3}{30}[/tex]

[tex]\sf \implies \frac{1}{v}=\frac{5}{30}[/tex]

[tex]\sf \implies v=\frac{30}{5}[/tex]

[tex]\sf \implies v=6 \ cm[/tex]

[tex]\therefore[/tex]

Image distance (v) = 6 cm

Nature of the image = Virtual and Erect

Answer:

Here is the answer. Hope this helps you!

Explanation:

Average velocity is the sum of initial and final velocity divided by 2. I t is the same as total Displacement divided by total time. Average velocity is calculated when the body is in non-uniform motion (also when total displacement and time is not given). The formula is as follows:

u + v/2 = [tex]v_{av}[/tex]

Average velocity = Average speed

during motion in a straight line. therefore, the above mentioned formula can be used for calculating average speed as well, when the direction is one and only the same, that is, during motion in a straight line. The S.I unit remains the same-

m/s.

Since velocity is vector, average VELOCITY is also vector. However, Average SPEED is scalar as speed is scalar. both can be equal only when the distance = displacement and when they are following the same direction of motion.

Answer:

The amount of gravity affecting an object depends on two things: the masses of the objects being attracted and the distance between the objects. Mass is the measure of the amount of matter in an object. With distance, we see that the strength of gravity decreases if the distance between two objects increases.

Hope this helps!

Answer:

Explanation:

Both small ball and a basketball are in form of a sphere. Total surface area of a sphere is gotten using the formula;

surface area of a sphere S = 4πr²

If the radius of a small ball is around 2.8436 cm, its total surface area will be:

S = 4π(2.8436)²

S =4π(8.086)

S = 101.61 cm²

If the radius of a basketball is about 4.22 times larger, the radius will be 4 times larger as well. The radius of the basket ball = 4.22*2.8436

radius of thr basketball = 11.99cm

Surface area of the basketball S2 =  4π(11.99)²

S2 =4π(143.76)

S2 =1806.54cm²

The ratio of the surface areas of the small ball and a basketball S:S2

S:S2 = 101.61 cm² : 1806.54cm²

S:S2 = 0.0562

Hence, the ratio of the surface areas of the small ball and a basketball is approximately 0.0562.

2) The volume of a sphere = 4/3πr³

Volume of the small ball = 4/3π(2.8436)³

Volume of the small ball = 4/3 π  * 22.994

Volume of the small ball= 96.315cm³

Similarly;

Volume of the basketball = 4/3π(11.99)³

Volume of the small ball = 4/3 π  * 1723.68

Volume of the small ball= 7220.14cm³

The ratio of the volume of the small ball and a basketball V:V2

V:V2 = 96.315  : 7220.14

V:V2 = 0.01333

Hence, the ratio of the volumes of the small ball and a basketball is approximately 0.01333

Answer:

constant acceleration,

Explanation:

when an object is moving without any change in direction,its acceleration is regarded as zero which also means that the object is moving at a constant acceleration.

If no forces are acting on a moving object, the object will continue to move with constant momentum.

To find the answer, we need to know about the force.

Thus, we can conclude that if no forces are acting on a moving object, the momentum is constant.

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Answer:

The star, Alpha Crucis, is brighter than the star, Alpha Centauri, when observed from Earth

Explanation:

The given parameters are;

The apparent magnitude of the star Alpha Centauri = -0.27

The apparent magnitude of  the star Alpha Crucis = 0.77

Let relative brightness of two stars is given by the relation

[tex]\dfrac{b_1}{b_2} = 2.512^{(m_1 - m_2)}[/tex]

Where;

m₁ = The apparent magnitude of the star Alpha Centauri = -0.27

m₂ = The apparent magnitude of  the star Alpha Crucis = 0.77

b₁ = The brightness of the star Alpha Centauri

b₂ = The brightness of the star Alpha Crucis

Which gives;

[tex]\dfrac{b_1}{b_2} = 2.512^{(-0.27 - 0.77)}= 0.383689[/tex]

Therefore;

b₁/b₂ = 0.383689 and

b₁ = b₂ × 0.383689

b₂ = b₁/0.383689 = 2.606×b₁

b₂ = 2.606×b₁

b₂ > b₁, b₂ is brighter than b₁, that is the star, Alpha Crucis is brighter than the star, Alpha Centauri, when observed from Earth.

Answer:

0.4m/s

Explanation:

It is given speed so it is scalar.

distance covered in 1 round = 180m

therefore, distance covered in 4 rounds = 180*4 = 720m

time = 30 mins = 30*60 = 1800 seconds

average speed = total distance/total time taken

= 720/1800

= 0.4m/s

Answer:

probably ounces or grams

Explanation:

Your question has been heard loud and clear.

Well , basically anything that moves in a certain direction is an example of unbalanced forces.

When we kick the football , the force given by our leg is greater than the frictional force by the ball and therefore the ball moves in the direction of the greater force , which is the force given by our leg.

Thank you

Answer:

friction

Explanation:

Answer:

The maximum speed of the oscillating object doubles as well.

Explanation:

The oscillatory motion of the object on the spring can be modelled using this equation below:

[tex]Vmax= A\omega[/tex]

Where

Vmax = the maximum speed of the oscillating object.

A = Amplitude of the oscillating object.

[tex]\omega[/tex] = angular velocity of the oscillating object.

If the amplitude, A becomes doubled, the new amplitude will be = 2A.

As a result,  [tex]Vmax = 2 A \omega[/tex]

This shows that the maximum speed has doubled in its value

Answer:

[tex] \boxed{\sf Density \ of \ the \ substance = 10.5 \ g/cm^3} [/tex]

Given:

Mass (M) = 7917 grams

Volume (V)= 754 cm³

To Find:

Density of the substance

Explanation:

[tex] \boxed{ \bold{\sf Density \ (\rho) = \frac{Mass \: (M)}{Volume \: (V)}}}[/tex]

Substituting values of M & V in the equation:

[tex] \sf \implies \rho = \frac{7917}{754} [/tex]

[tex]\sf \implies \rho = 10.5 \: g/ {cm}^{3} [/tex]

Find time when it strikes ground.

s = ut + 1/2 at²

We will first calculate the time taken by the ball to reach the highest point by using the formula:

S = ut + 1/2 at²

★ Substituting the values in the above formula,we get:

⇒ -40 = 10 × t + 1/2 × -10 × t²

⇒ -40 = 10t + ( - 5 ) × t²

⇒ -40 = 10t - 5 t²

⇒ 5t² - 10t - 40

⇒ 5t² - 20t + 10t - 40

⇒ 5t ( t - 4 ) + 10 ( t - 4 )

⇒ t - 4 = 0 and 5t + 10 = 0

⇒ t = 4 and t = -2

Thus,time taken is 4 seconds. [ Ignore negative number. ]

Answer:

[tex]\Huge \boxed{\mathrm{4 \ s}}[/tex]

Explanation:

Displacement ⇒ -40 m (the ball strikes the ground)

Initial velocity ⇒ 10 m/s

Acceleration of gravity ⇒ -10 m/s² (upward acceleration)

We can use a formula to find the time taken.

[tex]s = ut + 1/2 at^2[/tex]

[tex]s = \sf displacement \ (m)[/tex]

[tex]u = \sf initial \ velocity \ (m/s)[/tex]

[tex]a = \sf acceleration \ of \ gravity \ (m/s^2)[/tex]

[tex]t = \sf time \ taken \ (s)[/tex]

Plugging in the values.

[tex]-40 = (10)t + 1/2 (-10)t^2[/tex]

Solve for [tex]t[/tex].

[tex]-40 = 10t-5t^2[/tex]

[tex]5t^2-10t-40=0[/tex]

Factor the quadratic expression.

[tex]5(t+2)(t-4)=0[/tex]

Set the factors equal to 0.

[tex]t+2=0\\t=-2[/tex]

[tex]t-4=0\\t=4[/tex]

t = -2 and t = 4 (time value will not be negative in this case)

The time the ball takes to strike the ground is 4 seconds.

Answer:

4 m/s East.

Explanation:

Velocity: This cam be defined as the rate of change of displacement. The unit of velocity is m/s.

From the question,

v = d/t...................... Equation 1

Where v = velocity, d = displacement, t = time.

Given: d = 20 m East, t = 5 seconds.

substitute into equation 1

v = 20/5

v = 4 m/s East.

Hence the average velocity = 4 m/s East.

Answer:

Explanation:

Animal cells and plant cells share the common components of a nucleus, cytoplasm, mitochondria and a cell membrane. Plant cells have three extra components, a vacuole, chloroplast and a cell wall.

☄ Universal Gravitational Constant(G)

Gravitational constant is a constant of proportionality when F(Gravitational force) is proportional to product of masses and inversely proportional to the distance between them.

The value of G (universal gravitational constant) was found out by the scientist Henry Cavendish by using the sensitive torsion balance[tex].[/tex]

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Answer:

Here is the answer. Hope this helps you!

Explanation:

Now, from Universal law of gravitation, we come to know that:

F= force of attraction

M = the object with greater mass (taken from centre of the objects)

m = object with smaller mass (taken from centre of the objects)

d = distance (taken from centre of the objects)

F ∝ Mm

F ∝ 1/d²

Therefore, we get the formula

F ∝ Mm/d²

F = GMm/d²

Here, G is the constant of proportionality. It also accepted as the Universal gravitation constant. It has a value of 6.67*10^-11 Nm^2/kg^2.

The universal gravitation constant has allowed us to use the above formula to help us calculate and come to know about

Answer:

Solution

Load(L)=400

Effort(E)=100

Load distance (Ld)=20cm

Effort distance(Ed)=?

Now,from the principle of equilibrium

L×Ld=E×Ed

or,Ed=L×Ld/E

or,Ed=400×20/100

:.Ed=80cm and

Therefore,the effort distance will be 80cm

Answer:

80cm

Explanation:

load l = 400

Effort e = 100

load distance Ld = 20

Effort distance Ed = ?

L×ld= E×Ed

Ed=L×Ld \ E

Ed=400×20/100

Ed=80cm Ans

Answer:

Kitchen B

Explanation:

This all boils Down to the phenomenon of convection current of àir where warmer air rises up and is replaced by cooler air, the fan is placed higher up in B and because hot air rises higher up it will remove more hot air here

Answer:

a) La aceleración del movimiento es 1 metros por segundo al cuadrado, b) La fuerza que causa el movimiento es 80.000 newtons.

Explanation:

a) Supóngase que la locomotora acelera uniformemente, la aceleración se está descrita por la siguiente ecuación cinemática:

[tex]v = v_{o}+a\cdot t[/tex]

Donde:

[tex]v_{o}[/tex] - Rapidez inicial, medida en metros por segundo.

[tex]v[/tex] - Rapidez final, medida en metros por segundo.

[tex]a[/tex] - Aceleración, medida en metros por segundo al cuadrado.

[tex]t[/tex] - Tiempo, medido en segundos.

Se despeja la aceleración:

[tex]a = \frac{v-v_{o}}{t}[/tex]

Si [tex]v_{o} = 0\,\frac{m}{s}[/tex], [tex]v = 10\,\frac{m}{s}[/tex] y [tex]t = 10\,s[/tex], la aceleración del movimiento es:

[tex]a = \frac{10\,\frac{m}{s}-0\,\frac{m}{s}}{10\,s}[/tex]

[tex]a = 1\,\frac{m}{s^{2}}[/tex]

La aceleración del movimiento es 1 metros por segundo al cuadrado.

b) Dado que una locomotora es un sistema de masa constante, la fuerza ([tex]F[/tex]) que genera el movimiento es igual a:

[tex]F = m\cdot a[/tex]

Donde:

[tex]m[/tex] - Masa, medida en kilogramos.

[tex]a[/tex] - Aceleración, medida en metros por segundo al cuadrado.

Dados que [tex]m = 80.000\,kg[/tex] y [tex]a = 1\,\frac{m}{s^{2}}[/tex], la fuerza que causa el movimiento es:

[tex]F = (80.000\,kg)\cdot \left(1\,\frac{m}{s^{2}} \right)[/tex]

[tex]F = 80.000\,N[/tex]

La fuerza que causa el movimiento es 80.000 newtons.

Answer:

Explanation:

Given the maximum speed limit on interstate 10 as 75 miles per hour, to get the speed in meter per seconds, we need to convert the given speed to meter per seconds.

Using the conversion 1 mile = 1609.34m and 1 hour = 3600 seconds

75 miles perhour = 75miles/1 hour

75miles/1 hour (in m/s) = 75miles*1609.34m* 1 hour/1mile * 1 hour * 3600s *

= 75 *1609.34m* 1 /1 * 1 * 3600s

= 120,700.5m/3600s

= 33.53m/s

Hence the maximum speed limit on interstate 10 in metre per seconds is 33.53m/s

Answer:

net 5N of force will act in east direction.

Explanation:

force acting in North and South direction will cancel each other.

force in east direction - force in west direction = 5N