Why will a delivery truck filled with birds sitting on its floor be heavier than a truck with the same birds flying around inside.

Answers

Answer 1

The reason why a delivery truck filled with birds sitting on the floor be heavier than a truck with the same birds flying around is because when the birds are sitting on the floor, they are adding their weight to the truck.

Meanwhile, if the birds are flying around they aren't resting on the truck or touching it, so therefore their weight wouldn't be added to the truck.

The mass of the truck will remain the same as you cannot change the mass but the weight will vary depending on the items and objects placed in it.


Related Questions

how can I get good grades in physics?​

Answers

Answer:

work idk

Explanation:

if you pay attention and make notes of important things in your unit then it'll help get good grade

ask your teacher for extra credit or if there's anything you can do to raise your grade

Explain how series circuits use current and voltage and Explain how parallel circuits use current and voltage

Answers

'''In a series circuit, the sum of the voltages consumed by each individual resistance is equal to the source voltage. Components connected in parallel are connected along multiple paths so that the current can split up; the same voltage is applied to each component.''

a motorcar is moving with a velocity of 108 km / h and it takes 4s to stop after the brakes are applied calculate the force exerted by the brakes on the motorcar if it's mass along with the passengers is 1000 kg​

Answers

Answer: - 7500N

Explanation:

Given the following :

Initial Velocity of car = 108km/hr

Time taken to stop after applying brakes = 4s

Mass of passengers in car = 1000kg

Force exerted by the brakes on the car =?

After 4s, then final Velocity (V) = 0

Initial Velocity (u) of the car = 108km/hr

108km/hr = (108 × 1000)m ÷ (3600)s = 30m/s

Force exerted = mass(m) × acceleration(a)

Acceleration of car = Change in Velocity with time

a = (v - u) / t

a = (0 - 30) / 4

a = - 30/ 4

a = - 7.5m/s^2

Therefore,

Force exerted = mass(m) × acceleration(a)

Force exerted = 1000kg × (-7.5)m/s^2

Force exerted = - 7500N

Answer:

The force exerted by the brakes on the motor car is -7500 N.

Explanation:

Given :-

Mass of the motor car along with passengers (m)= 1000 kgInitial velocity (u) = 108 km/hTime taken (t) = 4 s

To find :-

The force exerted by the brakes on the motor car.

Solution :-

Since the car stops, the final velocity (v) will be 0 m/s.

• Initial velocity (u) = 108 km/h.

Converting initial velocity into m/s.

We know that,[tex] \sf{1\:km/h=\dfrac{5}{18}\:m/s}[/tex]

Then initial velocity,

= [108 × 5/18 ] m/s

= 30 m/s

Now find the force exerted by the brakes.

Formula used :

[tex]{\boxed{\sf{F=\dfrac{m(v-u)}{t}}}}[/tex]

   [put values]

[tex]:\implies \sf \: F= \dfrac{1000(0 - 30)}{ 4} \\ \\ : \implies \sf \: F \: = \dfrac{ - 30000}{4} \\ \\ : \implies \sf \: F \: = - 7500[/tex]

The force exerted by the brakes on the motor car = -7500 N.

•The negative sign of force(F) means that the force was applied in opposite direction of motion.

__________________

The power of a machine is 6000 W. This machine is scheduled for design improvements. Engineers have reduced the
time for the output by one half from 15 s to 7.5 s. What work would be required to cut the time in half.
Step #1
Step #2
Step #3​

Answers

Explanation:

Work = power × time

W = (6000 W) (7.5 s)

W = 45,000 J

A student with a mass of 66.0 kg climbs a staircase in 44.0 s. If the distance between the base and the top of the staircase is 14.0 m, how much power will the student deliver by climbing the stairs

Answers

[tex]power = 205.8 \: watt \\ solution \\ mass = 66 \: kg \\ time = 44 \: sec \\ distance = 14 \\ now \\ power = \frac{w}{t} \\ \: \: \: \: \: \: \: \: = \frac{f \times d}{t} \\ \: \: \: \: \: = \frac{m \times g \times d}{t} \\ \: \: \: \: \: \: = \frac{66 \times 9.8 \times 14}{44} \\ \: \: \: \: = \frac{9055.2}{44} \\ \: \: \: \: \: = 205.8 \: watt \\ hope \: it \: helps[/tex]

When the kinetic energy of particles in a substance decreases, what also decreases?
93
The size of the particles in the substance.
The number of particles in the substance.
The substance's specific heat.
The substance's temperature.

Answers

Answer: D

The substance's temperature

Explanation:

According to kinetic theory, increase in temperature causes increase in kinetic energy of particles in a system.

When the kinetic energy of particles in a substance decreases, it has nothing to do with the size of the particles and the specific heat capacity of the particles or substance. But it a clear indication that the substance temperature has also decreased.

Answer:

D

Explanation:

3.
If you are part of a center or network, you can use program-level data to
A. change the way you record and maintain information.
B. identify professional development needs.
C. improve the management systems to support child learning.
D. change the way you speak with families

Answers

Answer:

A

Explanation:

Answer: A

Explanation:

A 2kg object is dropped from a height 10m.Calculate the speed of the object after it has fallen 5m, assuming there is no resistance. g= 10 N/kg​

Answers

Answer:

10m/s

Explanation:

[tex]d=v_ot+\dfrac{1}{2}at^2[/tex]

Since there is no initial velocity as the object is dropped, you can write the following equation:

[tex]5=\dfrac{1}{2}(10)t^2 \\\\1=t^2 \\\\t=1[/tex]

Now that you know how long the fall took, you can use another physics equation to find the velocity at that point.

[tex]v_f=v_o+at[/tex]

Since there once again is no initial velocity, you can rewrite this as:

[tex]v_f=at=(10)(1)=10m/s[/tex]

Hope this helps!

The kinetic energy the object has at any point during the fall is exactly the potential energy it lost by falling to that height.

Potential energy = (mass) · (gravity) · (height)

Change of potential energy = (mass) · (gravity) · (change of height)

Change of potential energy = (2 kg) · (10 m/s ) · (-5 m)

Change of potential energy = 100 Joules

Kinetic energy = (1/2) · (mass) · (speed²)

Kinetic energy = (1 kg) · (speed² )

100 J = (1 kg) · (speed²)

Speed² = (100 J) / (1 kg)

Speed² = (100 kg-m²/s²) / (1 kg)

Speed² = (100 m²/s²)

Speed = 10 m/s  

Is a 5kg ball is rolling to the right and has a velocity of 4 m/s what is the momentum of the ball

Answers

Answer:

∆p = 20 kg * m/s

Explanation:

The change in momentum is the mass of the body multiplied by the change in its velocity.

In formula form ∆p = m * ( ∆v ).

with m = 5 kg and ∆v = 4 m/s

∆p = 5 kg * 4 m/s

∆p = 20 kg * m/s

If the potential difference across the bulb in a camping lantern is 9.0 V, what is the
potential difference across the cells used to power it?

Answers

Answer:

9.0 V.

Explanation:

battery gives the voltage of 9.0 V to the lantern to use it.

The voltage across the bulb in camping lanterns is equal to the potential difference across the cells that are used to power it. So, 9 V.

What is meant by potential difference ?

Potential difference between two points is defined as the amount of work required to move a unit positive charge along any path between two places in the electric field without accelerating the charge.

Here,

While the one point has a lower potential, the other one has a higher potential. The term voltage or potential difference refers to the charge difference between higher and lower potentials.

The force needed for the electrons to move through a circuit is provided by the voltage or potential difference.

In a series circuit, the voltage across a bulb is equal to the voltage across the battery only if the bulb and the battery are the only components in the circuit.

Hence,

The voltage across the bulb in camping lanterns is equal to the potential difference across the cells that are used to power it. So, 9 V.

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Salt is dissolved in a flask of tap water . Distilling the mixture causes the salt to separate from the water. Which type of energy is required to begin the distilling process

Answers

I think it’s kinetic energy

A car accelerates from 10m/s to 20m/s over a distance of 80m. What is its acceleration?

Answers

Answer:

0.125m/s^2

Explanation:

20-10=10

10 divided by 80=0.125m/s^2

The average velocity of the car is 15 m/s. The time taken to travel over the distance with this velocity is 5.3 seconds. Then the acceleration of the car is 1.8 m/s².

Wat is acceleration ?

Acceleration is a physical quantity measuring the rate  of change in velocity of a moving object. Like velocity, acceleration is a vector quantity having magnitude and direction.

Acceleration is the ratio of change in velocity to the change in time.

a = Δv/Δt

Given, the car is accelerating from 10 to 20 m/s. Hence, it travelled with average velocity of 15 m/s over the distance of 80 m.

Then , time taken  = distance/velocity

t = 80 m/15 m/s = 5.3 s

Acceleration = Δv/t = (20 -10 m/s) /5.3 s = 1.8 m/s².

Therefore, the acceleration of the car is about  1.8 m/s².

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can someone help what are the common branches of physics

Answers

Answer: Dear Buddy ,the common brnches os physics are given below:

Explanation:

Mechanics

Classical physics

Modern physics

Thermodynamics

Electricity

Magnetism

Geo physics

Plasma physics

Optics

Sound and oscillation

Electronics

Chemical physics

Engineering physics

Solid state physics

Quantum physics

Nuclear physics

Particle physics

Bio physics

Astrophysics

Condensed matter physics

hope it helps

Answer:

Engineering is one of branches that uses physics mainly the most

Explanation:

as for engineering requires mathematics and physics principles in their everyday routine to calculate and measure accordingly to manufactur a product.

Is there a link between number of bulbs and current drawn from the power pack?

Answers

Answer:

Yes, there a link between number of bulbs and current drawn from the power pack.

Explanation:

In an Electrical circuit, we have resistors present in that circuit. These resistors can be connected in two ways.

a) Series connection

b) Parallel connection

There is a link or a relationship between number of bulbs and the current drawn from the power pack. This is because the number of bulbs is equivalent to or equal to the number of resistors.

Hence,

a) In a series connection, the link or relationship between the number of bulbs(resistors) is as the number of light bulbs increases, the current in the power pack (circuit) decreases.

b) In a parallel connection, the link or relationship between the number of bulbs(resistors) is as the number of light bulbs increases, the current in the power pack (circuit) increases.

calculate the pressure exerted by a man having mass 50 kg standing on one feet having area 500cm2​

Answers

Answer:

9800 Pa

Explanation:

Data: pressure-?

Force- mass ×acceleration

= 50× 9.8m/s^2

=490N

Area= 500cm^2=0.05m^2

pressure= force/ area

p=F/A

P= (490N)/( 0.05m^2)

=9800 Pa

Chemical potential energy can be released into
energy
OA) heat
OB) elastic
OC) potential​

Answers

The answer is A) heat.

Answer:

C Potential

Explanation:

Chemical potential energy is a form of potential energy related to the structural arrangement of atoms or molecules. This arrangement may be the result of chemical bonds within a molecule or otherwise. Chemical energy of a chemical substance can be transformed to other forms of energy by a chemical reaction.

What is the acceleration if velocity increases from 10 m/s to 15m/s after travelling a distance of 5 metre​

Answers

Answer:

a=1.25m/s²

Explanation:

GIVEN DATA

vi=10m/s

vf=15m/s

S=5m

TO FIND

a=?

SOLUTION

by using third equation of motion

2as=(vf)²-(vi)²

2a(5m)=(15m/s)²-(10m/s)²

10m×a=225m²/s²-100m²/s²

10m×a=125m²/s²

a=[tex]\frac{125}{10}[/tex]

a=12.5m/s²

why is no one helping?

Answers

Answer:

First one is hyperopia, second is myopia

Explanation:

Hyperopia is when the image is formed behind the retina.

Myopia is when images are formed infront of the retina.

What is the magnitude of impulse of a 2.7 gram ping pong ball initially moving at 15 m/s, if hit by a ping pong paddle and then moves the opposite direction at 14/ms

Answers

Answer:

impulse = 0.0783 kg.m/s

Explanation:

The impulse is the product of the force and an interval of time. This can be represented in terms of the mass of the body and the change in the velocity of the body in such a time:

[tex]F\Delta t=m\Delta v[/tex] [tex]=|m(v_f-v_i)|[/tex]

m: mass of the body = 2.7gm = 0.0027 kg

vf: final velocity = -14m/s

vi: initial velocity = 15m/s

vf is negative because the direction of the ball is opposite to the initial direction:

[tex]|m(v_f-v_i)|=|(0.0027kg)(-14m/s-15m/s)|=0.0783\frac{kg.m}{s}[/tex]

hence, the impulse of the ping pong ball is 0.0783 kg.m/s

A 2 kg billiard green ball is moving toward the 2 kg white billiard ball on a pool table. The green ball is moving with an initial speed of 4 m/s and the white ball is at rest. The two balls collide and move apart. The white ball moves away from the green ball with a speed of -6 m/s. With what speed does the green ball move away?

Answers

Answer:

10m/s

Explanation:

collisions results in objects sticking together or not sticking together after collision and so they do move with a common velocity or uncommon velocity respectively.

Parameters from the question:

Mass of green billiard balls, m1=2kg

Mass of white billiard balls, m2=2kg

Initial velocity for green billiard balls ,u1=4m/s

Initial velocity for white billiard balls ,u2 = 0m/s( since the body is at rest meaning it wasn't moving)

Final velocity of green billiard ball after collision is,v1= unknown

Final velocity of white green billiard ball after collision is, V2 = -6m/s.

Now from Newton's third law of motion that action and reaction must be equal and opposite;hence change in momentum before collision would be the same after collision since energy is conserved.

Hence,

m1U1 + m2U2 = m1V1 +m2V2

2×4 + 2×0 = 2×V1 + 2× (-6)

8 = 2V1 -12

8+12=2V1

20=2V1

10=V1

V1=10m/s

Q1: A step-up transformer has 80 turns on its primary coil and 1200 turns on its secondary coil. The
primary circuit is supplied with an alternating current at 120 V.
a) What voltage is being applied across the secondary circuit?
b) The current in the secondary circuit is 2.0 A. What current is in the primary circuit?
c) What are the power input and output of the transformer?

Answers

Answer:

a. 1.8 kV b. 30 A c. power input = 3.6 kW, power output = 3.6 kW

Explanation:

a. Since turns ratio N₁/N₂  = V₁/V₂ where N₁ = number of turns of primary coil = 80 turns, N₂ = number of turns of secondary coil = 1200 turns, V₁ = voltage in primary circuit = 120 V and V₂ = voltage in secondary circuit = unknown

So, V₂ = N₂V₁/N₁

= 1200 × 120 V/80

= 1800 V

= 1.8 kV

b. Also, N₁/N₂ = I₂/I₁ where I₁ = current in primary circuit = unknown and I₂ =  current in secondary circuit = 2.0 A

So, I₁ = N₂I₂/N₁

= 1200 × 2.0 A/80

= 30 A

c. The power input of the transformer P₁ = I₁V₁

= 30 A × 120 V

= 3600 W

= 3.6 kW

The power output of the transformer P₂ = I₂V₂

= 2 A × 1800 V

= 3600 W

= 3.6 kW

a) The voltage applied across the secondary circuit is 1.8 kV

b) The current in the primary circuit is  30 A

c) The power input and output of the transformer are 3.6 kW and 3.6 kW.

What is transformer?

A transformer transfers electric energy from one AC circuit to one or more other circuits, either stepping up or stepping down the voltage.

a)  Turns ratio N₁/N₂  = V₁/V₂ where N₁ = number of turns of primary coil = 80 turns, N₂ = number of turns of secondary coil = 1200 turns, V₁ = voltage in primary circuit = 120 V

Substitute the values and we get the voltage in secondary circuit is

V₂ = N₂V₁/N₁

V₂ = 1200 × 120 V/80

V₂ = 1800 V

V₂ = 1.8 kV

Thus, the voltage applied across the secondary circuit is 1.8 kV

b) Turn ratio also represented as  N₁/N₂ = I₂/I₁ where  I₂ is the current in secondary circuit = 2.0 A
Put the values, we have current in primary circuit is

I₁ = N₂I₂/N₁

I₁ = 1200 × 2.0 A/80

I₁ = 30 A

Thus, the current in the primary circuit is  30 A

c) The power input of the transformer P₁ = I₁V₁

P₁ = 30 A × 120 V

P₁ = 3600 W

P₁ = 3.6 kW

The power output of the transformer P₂ = I₂V₂

P₂= 2 A × 1800 V

P₂= 3600 W

P₂= 3.6 kW

The power input and output of the transformer are 3.6 kW and 3.6 kW.

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what is brightness. help asap

Answers

Answer:

The subjective visual sensation related to the intensity of light emanating from a surface or from a point source.

What is the most likely reason why these early flowers gradually changed to many different types of flowers over time?

Answers

Answer:

The flowers adapted to environmental conditions.

Explanation:

QUICK WILL MARK BRAINLIEST
As light shines from air to water, the index of refraction is 1.02 and the angle of
incidence is 38.0 °. What is the light's angle of refraction?

29.8°
32.5°
37.1°
39.8°

Answers

Answer:

37.1°

Explanation:

Write down any four points that should be considered during household wiring

Answers

1. Safety equipment is available
2. Person attempting the task has some general knowledge about wiring
3. Not All Cable is Color-Coded
Cable-sheath color coding started in 2001 and is still voluntary. If you have older wiring, don’t assume it complies with the current color coding. However, most manufacturers now follow the standard color code.
4. Stranded wire is more flexible than solid. If you’re pulling wire through conduit, stranded wire makes it easier to get around corners and bends in the conduit. However, if the situation requires pushing wires through conduit, you’ll want to use solid wire.

Answer:

USE RUBBER CLOVES

USE A PLIER

USE CONDUCTIVE WIRES

SWITHC OFF THE MAIN SWITCH WHILE WIRRING

Explanation:

A sheet of paper 3.0 cm by 4.0 cm is lying on the desk. If the atmospheric pressure is 1.013105 Pa, what is the total force exerted on the top side of the paper by the atmosphere?

Answers

Answer:

132.56N

Explanation:

Pressure is defined as force per unit area.

Expressed mathematically as;

P = F/A

Where P-pressure

F-force

A-area

From the above formula,

F= P×A

= 1.1013 × 10^5 × (3×4/10000)

= 11.013×12 =132.56N

Note: the unit of measure in cm is converted to m and since 100cm makes 1m for each sides 3cm and 4cm we convert to 'm' by dividing by 100 twice giving division by 10000)

The unit of measure Pa means Pascal and is the same as N/m2

What is the name of the change in state by which some more energetic molecules in a liquid leave the surface, leaving the rest of the liquid slightly cooler.

Answers

Answer:

evaporation

Explanation:

vapor is having higher temperature (also energy) that the liquid it left behind.

that's why the water vapor leave the surface of water which can only have a maximum temperature as 100°C

What is the centripetal force of an object undergoing uniform circular motion when its radius is doubled and its speed remains constant?
A.
the same as before
B.
twice as great as before
C.
half as great as before
D.
four times as great as before

Answers

Answer:

C

Explanation:

Now the centripetal force is that force that keeps the object on course along the circle;

This is expressed mathematically as ;

F = mv^2/ r

Where F - centripetal force

m- mass of the object

v- velocity of the object

r- raduis

Note from the expression as r increases F decreases so if v and the mass is constant if r doubles F will reduce by half.

Answer:

C. half as great as before

Explanation:

A horse runs for 15 seconds to the south at a speed of 12 m/s. What is the
displacement of the horse in this time?
A. 180 m south
B. 150 m south
C. 150 m
D. 180 m

Answers

Answer: 180 m south

Explanation:

The displacement of the horse in this time is 180 m south. The correct option is A.

What is displacement?

The displacement is the shortest distance travelled by the particle. It is the vector quantity which re[presents both the magnitude and direction.

Velocity is the time rate of change of displacement with time.

Given is a horse runs for 15 seconds to the south at a speed of 12 m/s. So, the displacement is

Displacement = Speed x Time

Put the values, we get

Displacement = 12 m/s x 15s

                      = 180 m

Thus, the displacement of the horse in this time is 180 m south.

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Investigator Robbins is called to the scene of a robbery. The officer on the scene thinks that the suspect entered the home from the garage. As Investigator Robbins checks over the house, he does not find any evidence of forced entry. He cannot find any physical evidence near the garage door at all. There is a window open above the kitchen sink and footprints in the mud under the window outside. Based on his examination, what conclusion might Investigator Robbins make?


1. The officer was correct; the garage was the point of entry.

2. There is no evidence to indicate that anyone entered the home.

3. The officer's conclusion was mistaken, and a suspect may have entered through the window.

4. The garage was the point of entry, but the window was the escape route.

Answers

Answer:

3

Explanation:

Since the evidence found points to the window on investigation remember there was a foot print below the window as well as the window been opened.

Other Questions
Help! I need an interesting monologue idea with any of the following settings: 1. City street2. Diner3. Farm4. On the moon5. Underwater Every night at 9 p.m., the phone rings with calls from companies you have never heard of asking you to buy their products. You have asked them to stop calling you, but they refuse. Which agency can help you with this problem?A. Federal Communications CommissionB. Federal Trade CommissionC. Food and Drug AdministrationD. National Highway Traffic Safety AdministrationE. Transportation Security Agency If f ( x ) f ( x ) is a linear function, f ( 5 ) = 0 f ( - 5 ) = 0 , and f ( 2 ) = 4 f ( 2 ) = 4 , find an equation for f ( x ) f ( x )f(x)=________ At the beginning of July, CD City has a balance in inventory of $2,950. The following transactions occur during the month of July.July 3 Purchase CDs on account from Wholesale Music for $1,850, terms 2/10, n/30. July 4 Pay cash for freight charges related to the July 3 purchase from Wholesale Music, $110. July 9 Return incorrectly ordered CDs to Wholesale Music and receive credit, $200. July 11 Pay Wholesale Music in full. July 12 Sell CDs to customers on account, $4,900, that had a cost of $2,550. July 15 Receive full payment from customers related to the sale on July 12. July 18 Purchase CDs on account from Music Supply for $2,650, terms 2/10, n/30. July 22 Sell CDs to customers for cash, $3,750, that had a cost of $2,050. July 28 Return CDs to Music Supply and receive credit of $210. July 30 Pay Music Supply in full.Assuming that CD City uses a perpetual inventory system, record the transactions. The ratio x:y is 3:1Which of the following statements is correct?1)x is 3/4 of y 2) y is 1/3 of x3) x is 1/3 of y4) y is 1/4 of x How is Percys point of view of Gabe influenced by their interactions pages 39-40? *A. By showing how Gabes actions bring comfort to Percy and his mother.B. By showing how much Percy appreciates Gabe as his stepdad through his actions.C. By developing feelings of frustration due to Gabes behavior towards Percy and his mother.D. By making Percy feel powerful in their conversations. Would you please sign the petition for the back lives matter project,?A YesB YesC Yes Am I right? Please help me Find a. Roud to the nearest tenth:2cm15*a105*c Simplify the quotient shown 3480 divided by 29 In this excerpt, Grimke says that her early life among the butterflies of the fashionable world" taught her that these women'slives were centered ona learning to think for themselvesc taking care of their parents and friendsb. attracting the attention of mend becoming creatures of distinction Read the sentence.The restaurant was very crowded, but we decided to stay.Is the sentence a run-on sentence?A yesB. no Classify the following triangle. Check all that apply. what is question 67? The Confederation Congress (1781-1789) passed an importantlaw which called for the surveying and sale of westem lands.This law also set aside land for the support of public schools.What is the name of this law? Urgent! please help!(row 1-2) Select if each situation represents a nonlinear function, a linear function, or not a function. A shop has 4 types of sweets (chocolate, taffy, gummies, and cookies), 2 types of snacks (chips and crackers), and 3 types of drinks (sodas, juice, and sports drinks).Mystery boxes are put together that randomly combine 1 sweet, 1 snack, and 1 drink.What is the probability that a mystery box contains chocolate, chips, and juice? Please select the word from the list that best fits the definitionEs donde ponemos nuestras maletas en el taxi. The objectives of labor unions have Multiple Choice always placed the greatest emphasis on increasing wages and benefits. shifted with social and economic conditions. frequently taken global competition into account. consistently favored policies that would move the U.S. economy toward a command system. Electricity usage data consists of 45 months has a mean number of units consumed is 390.47 per month with a standard deviation of 170.5 units per month. Assume that the number of units consumed are approximately normally distributed. Estimate 95% confidence interval for the average monthly electricity consumed units.