Suppose you are standing on a scale in an elevator that is accelerating upward. Will the scale read your weight as larger for smaller than the weight it reads when you are stationary?

Answer:

a survey

Explanation:

how kids like the playground or they do not like it at all

Answer:

The end of the ramp is 38.416 m high

Explanation:

Horizontal Motion

When an object is thrown horizontally with an initial speed v and from a height h, it follows a curved path ruled by gravity.

The maximum horizontal distance traveled by the object can be calculated as follows:

\(\displaystyle d=v\cdot\sqrt{\frac {2h}{g}}\)

If the maximum horizontal distance is known, we can solve the above equation for h:

\(\displaystyle h=\frac {d^2g}{2v^2}\)

The skier initiates the horizontal motion at v=25 m/s and lands at a distance d=70 m from the base of the ramp. The height is now calculated:

\(\displaystyle h=\frac {70^2\cdot 9.8}{2\cdot 25^2}\)

\(\displaystyle h=\frac {4900\cdot 9.8}{2\cdot 625}\)

h= 38.416 m

The end of the ramp is 38.416 m high

Answer:

The heat needed to raise the temperature of 1 gallon of water from 68°F to 40°C is approximately 28,265 Joules.

Explanation:

Answer:

the wavelength will decrease

Explanation:

If the frequency of a wave increases, the wavelength will decrease. This is because the speed of the wave is constant for a given medium, so if the frequency (the number of waves passing a fixed point per second) increases, then the distance between successive wave crests (i.e., the wavelength) must decrease to maintain a constant speed. This relationship is described by the wave equation:

v = f λ

where v is the speed of the wave, f is the frequency, and λ is the wavelength. If v is constant and f increases, then λ must decrease to keep the equation balanced.

Answer:

Explanation:

Quarter 1 - 10,000 units

Quarter 2 - 12,000 units

Quarter 3 - 16,000 units

Quarter 4 - 14,000 units

Quarter 5 - 10,000 units

Quarter 6 - 8,000 units

Based on this information, the total estimated sales revenue for the next six quarters is Br. 480,000.

Because Newton as Pressure = Thrust/Area, the answer will be 7.5.

The rotating equivalent of Newton's first law is this. When each child's weight exerts an equal amount of torque about the pivot in opposing directions, two kids can balance on a seesaw (clockwise and counter clockwise).

The idea of the seesaw You are probably aware that any two people, regardless of their weights, can balance each other while seated on opposite sides of a seesaw. All that is required is for each individual to contribute an equal moment, which is determined by multiplying the person's weight by the distance from the fulcrum.

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Answer:   Mechanical energy is the energy that is possessed by an object due to its motion or due to its position.

(The energy acquired by the objects upon which work is done)

To determine the magnitude of the lift force ⃗ and the force of air resistance ⃗ acting on the jet, we need to resolve the weight ⃗ and the forward thrust ⃗ into their horizontal and vertical components.

The weight ⃗ can be resolved into two components:

- the vertical component, Wsin(30°), acting downward

- the horizontal component, Wcos(30°), acting to the left

The forward thrust ⃗ can also be resolved into two components:

- the vertical component, Tsin(30°), acting upward

- the horizontal component, Tcos(30°), acting to the right

Since the jet is flying at a constant speed, the lift force ⃗ must be equal in magnitude to the weight component acting downward, Wsin(30°). Therefore, the magnitude of ⃗ is 86,500 Nsin(30°) = 43,250 N.

The force of air resistance ⃗ is equal in magnitude to the horizontal component of the weight, Wcos(30°), minus the horizontal component of the forward thrust, Tcos(30°). Therefore, the magnitude of ⃗ is (86,500 Ncos(30°)) - (103,000 Ncos(30°)) = -8,715 N, where the negative sign indicates that the force of air resistance is acting in the opposite direction to the motion of the jet.

Therefore, the magnitude of the lift force ⃗ is 43,250 N and the magnitude of the force of air resistance ⃗ is 8,715 N.

Answer:

Hold down the shift key if your on windows, mac or chromebooks.

Explanation:

Computer Technician

Answer:

Press the "caps lock" button and then press which letter u want to be in cap

Answer:

Q = 665 J

Explanation:

Given:

m = 500 g = 0.5 kg

T₁ = 250.0 K

T₂ = 240.0 K

c = 133 J / ( kg*⁰K) - Specific heat capacity of platinum

___________

Q - ?

 Heat is released:

Q = c*m*( T₁ - T₂) = 133*0.5*(250.0 - 240.0) =

= 133*0.5*10 ≈ 665 J

Explanation:

a) It will weigh less because of its distance from the block.

b) torque = W1×d1 = (10N)(0.25m) = 2.5 N-m

c) torque = W2×d2 = W2×(0.50m)

d) W2×d2 = W1×d1

W2 = (d1/d2)W1

= 5 N

The sound is most likely an approximant.

The spectrogram reading shows a segment, which is a formant-like bar centered around 140 Hz.

That means it is a smooth airflow, having a relatively stable frequency. Therefore, we can say that is an approximant, which is a consonant sound that is produced by bringing two articulators close together but not to the point of complete closure, resulting in a smooth airflow.  

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Answer:

Explanation:

I'm going to guess that you want the net force.

These two forces are acting in opposite directions. Therefore the forces are subtracted in effect.

F = F1 - F2

F1 = 22N to the right

F2 = 13N to the left

F = 22 - 13 = 9 N to the right.

Specifying the direction is very important. Forces do have directions and you must specify what that is. Otherwise, the question should be marked incorrect.

At a divergent boundary, heat and pressure can cause metamorphism, magma can solidify to form igneous rocks, and sediments can accumulate and lithify to form sedimentary rocks. These three processes contribute to the formation of various types of rocks.

At a divergent boundary, three main processes occur that can lead to the formation of metamorphic, igneous, and sedimentary rocks:

1. Metamorphic rocks: Heat and pressure from the divergent boundary can cause existing rocks to be metamorphosed, or transformed, into new rocks with different textures and mineral compositions. This process is called metamorphism.

2. Igneous rocks: Magma, which is molten rock, can rise to the surface at a divergent boundary and cool and solidify to form igneous rocks. This process is called solidification or crystallization.

3. Sedimentary rocks: Sediments, such as sand and mud, can accumulate in the low-lying areas near a divergent boundary, such as in rift valleys or on the continental shelf. Over time, these sediments can be compacted and cemented together to form sedimentary rocks. This process is called lithification.

Hence, Heat and pressure at a divergent boundary can produce metamorphism, solidify magma to create igneous rocks, and accumulate and lithify sediment to create sedimentary rocks. Different sorts of rocks are formed as a result of these three processes.

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An insulating vessel contains 80 g of a block of ice at -12 °C. If 450 g of water at 60 °C is added to the ice in the vessel, Energy required for complete melting = \(80 g X (3.33 X 10^3 J/kg)\).

To determine whether the ice will soften absolutely and calculate the final temperature of the system, we need to do not forget the strength transferred among the ice and water at some stage in the procedure.

(i) To decide if the ice will melt completely, we need to examine the energy won by using the ice to the electricity required for complete melting.

Energy received by way of the ice = mass of ice × particular heat capacity of ice × alternate in temperature

Energy won by using the ice = eighty g × 2100 J/(kg·°C) × (final temperature - (-12°C))

Energy required for complete melting = mass of ice × latent warmth of fusion of ice

Energy required for whole melting = 80 g × (3.33 × 10^3 J/kg)

If the strength received via the ice is extra than or same to the electricity required for entire melting, the ice will soften completely.

(ii) To calculate the very last temperature of the gadget, we want to keep in mind the power transferred between the ice and water.

Energy won by the water = mass of water × unique heat ability of water × trade in temperature

Energy received by using the water = 450 g × 4200 J/(kg·°C) × (final temperature - 60°C)

Since electricity is conserved inside the machine, the power gained by means of the ice and water need to be identical:

Energy gained through the ice = Energy won by the water

Using the equations above, we will installation the following equation:

80 g × 2100 J/(kg·°C) × (very last temperature - (-12°C)) = 450 g × 4200 J/(kg·°C) × (very last temperature - 60°C)

Thus, this the final temperature of the system.

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Answer:

So do 2400 divided by 70. I got 34.285714 and the numbers behind the decimal are repeating. If you round it you get 34.3

The initial momentum of the first car is 12 000 kg × 6.0 m/s = 72 000 kg m/s. After the collision, the two cars are combined into a single system with a mass of 24 000 kg. The momentum of this system must be conserved, so: initial momentum = final momentum

72 000 kg m/s = 24 000 kg × final speed

Solving for final speed:

final speed = 72 000 kg m/s / 24 000 kg = 3.0 m/s

So the common speed of the two cars after the collision is 3.0 m/s.

The force that maintains an object moving in a certain direction is measured by momentum. It is a vector quantity that is conserved in a closed system and is defined as the product of an object's mass and velocity. As a result, a system's overall momentum always remains constant in the absence of external pressures. Physics places a lot of emphasis on momentum, especially when studying motion and the transmission of energy. The result of a system's mass times its velocity is its linear momentum.

According to the rule of conservation of momentum, absent an external force, the combined momentum of two or more bodies operating upon one another in an isolated system remains constant.

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Answer:

the car has greater momentum.

the car has greater kinetic energy.

Explanation:

FOR MOMENTUM:

Momentum is given as the product of mass and velocity of an object:

\(P = mv\)

where,

P = momentum

m = mass

v = velocity

For Truck:

\(P_{truck} = (3530\ kg)(21\ m/s)\\P_{truck} = 74130 Ns\)

For Car:

\(P_{car} = (1620\ kg)(54\ m/s)\\P_{car} = 87480\ Ns\)

Therefore, car has greater momentum.

FOR KINETIC ENERGY:

Kinetic Energy is given as:

\(K.E = \frac{1}{2} mv^{2}\)

where,

K.E = Kinetic Energy

m = mass

v = velocity

For Truck:

\(K.E_{truck} = \frac{1}{2} (3530\ kg)(21\ m/s)^{2}\\K.E_{truck} = 778365\ J = 778.36\ KJ\)

For Car:

\(K.E_{truck} = \frac{1}{2} (1620\ kg)(54\ m/s)^{2}\\K.E_{truck} = 2361960\ J = 2361.96\ KJ\)

Therefore, car has greater kinetic energy.

Answer:

Answer is number 1

Explanation:

18,000 kilowatt hours

Calculated energy consumed from the power company, when hair salon uses a 3000 watt hair dryer for 6 hours daily is 18 kW-hr. Therefore option B is correct.

What is Power?

Power is the rate of doing work. Power is also defined as work divided by time. i.e. Power = Work ÷ Time. Its  SI unit is Watt denoted by letter W. Watt(W) means J/s or J.s-1. Something makes work in less time, it means it has more power. Work is Force times Displacement.

Dimension of Power is [M¹ L² T⁻³]

Given,

Power P = 3000W = 3 kW

Time = 6 hr

Energy in kW-hr =?

By using formula,

P = Energy ÷ Time

Energy E = Power × Time

E = P× t

E = 3 kW × 6 hr

E = 18 kW-hr.

Hence energy consumed by hair dryer is 18 kW-hr. Therefore option B is correct.

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Answer:

The average velocity is 0.15 m/s

Explanation:

Use the definition of average velocity as the distance traveled divided the time it took.

Since the movement was on the plane from the origin (0, 0) to the point (-30, 20) corresponding to 30 m west and 20 m north, we calculate the distance using the distance between two points on the plane:

\(distance=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2} = \sqrt{(-30)^2+20^2} =\sqrt{1300} \approx 36.06\,\,m\)

Then the magnitude of the average velocity can be estimated via the quotient between distance divided time, but since the units required are meters per second, we first convert the four minute time into seconds: 4 * 60 = 240 seconds.

Then the average velocity becomes:

\(v_{ave}=\frac{distance}{time} =\frac{36.06}{240} =0.15\,\,m/s\)

Answer:

v=fy

Explanation:

v=fy

v= speed of light

f=frequency

y=wave lenght

make f subject of formula in this case

v=fy

f=v/y

f=20/5

f=4Hz

If half of the heat generated goes into warming the ball then the

temperature increase of the ball into 0.71°C

Conservation of energy: ball is dropped (Vinitial=0, KE=0) so Energy at top is PE=mgh.

This will be the same amount used to generate heat.

1/2E=1/2 mgh=1/215 kg 9.8 m/s²

m =.5159.8J

H=1/2E=cmT

.5159.8J=450 J/kgC 15kg T

T=.5159.8J / (450 J/kgoC 15kg) =.5159.8/(450*15)°C

potential energy U = m*g*h

heat = U/2

m*c * delta _T = m*g*h/2

delta_T = m*g*h/2*m*c

delta_T = g*h / 2C

delta_T = 9.8*150 / 2*450

delta_T = 1.63 degrees

What is energy?

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Answer:

yes SI units are used for scientific works

Explanation:

because they are standard units and can be used by anyone easly

Answer:

Why

Explanation:

equal in magnitude but opposite in direction

Since the initial linear momentum of the system is 0, the linear momentum of the gun-arm system must be equal in magnitude and opposite in direction to the linear momentum of the bullet.

Find the linear momentum of the bullet:

If the gun-arm system recoils with a speed v, the total linear momentum of the gun-arm system is:

Since the linear momentum of the gun-arm system must have the same magnitude as the linear momentum of the bullet, then:

Isolate v and find its value:

Therefore, the recoil speed of the shotgun and arm-shoulder combination is 0.8 meters per second.

Answer:

Newton's first law of motion concerns any object that has no force applied to it.

Explanation:

three laws of motion and the law of universal gravitation.

Answer:

no..

Explanation:

in balanced force it will or in this case u would stay still or u would move at the same speed.. but when u jumps the speed changes..so this is an unbalanced force

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Explanation:

where I is the current, L is the length of the wire, and B is the magnetic field.

If we point our right-hand thumb in the direction of the current (to the right), and our fingers in the direction of the magnetic field (away from us), then our palm will point in the direction of the force.