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Answer:

D

Explanation:

The amount of energy present in the matter

Answer:

Based on the options given, the most likely answer to this query is The square of the orbital periods of the planets are directly proportional to the cubes of their average distances from the Sun.  

Explanation:

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Answer:

90m

Explanation:

Distance is not a vector but a scalar quantity. depicted by a quantity only.

hence:

Distance is equal to 30+40+20 = 90 m

Answer:

The needed energy to melt of ice is 1670 J.

Explanation:

Given that,

Mass of ice = 5 g

Specific latent heat = 334000 J/kg

We need to calculate the energy

Using formula of energy

[tex]Q=mL[/tex]

Where, m = mass

L = latent heat

Put the value into the formula

[tex]Q=5\times10^{-3}\times334000[/tex]

[tex]Q=1670\ J[/tex]

Hence, The needed energy to melt of ice is 1670 J.

Answer:

Yes, Nurses are experience a stress in a higher rate at workplace.

Explanation:

We know that,

Stress in nursing :

According to association of american holistic nurses,

Nurses are experience a stress in a higher rate at workplace.

These stress are,

Physical demand

Management problems

lack of staff

Increment of number of patients

Face with death,

Fighting to infection as highly stressful factors in the workplace

Hence, Yes, Nurses are experience a stress in a higher rate at workplace.

Answer:

D. Both are held together by gravitational forces

Explanation:

The common features in galaxies are;

Answer:

c

Explanation:

the first 35 to 40 acceleration will be 5 same as 40 to 45 ,

5+5=10

Car is moving in a straight line and steadily increases its speed. Then its acceleration in the first is  35 to 40 acceleration will be 5 same as 40 to 45 ,then 5+5=10.

"Speed is the distance traveled per unit of time. It is how fast an object is moving. Speed is the scalar quantity that is the magnitude of the velocity vector. It doesn't have a direction."

"Acceleration is the rate of change of the velocity of an object with respect to time. Accelerations are vector quantities. The orientation of an object's acceleration is given by the orientation of the net force acting on that object. "

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Answer:

The momentum of the car is 35,000 kg.m/s

Explanation:

Momentum

Momentum is often defined as mass in motion.

Since all objects have mass, if it's moving, then it has momentum. It can be calculated as the product of the mass by the velocity of the object:

[tex]\vec p = m\vec v[/tex]

If only magnitudes are considered:

p = mv

The car has a mass of m=1,000 kg and travels at v=35 m/s. Calculating its momentum:

p = 1,000 kg * 35 m/s

p = 35,000 kg.m/s

The momentum of the car is 35,000 kg.m/s

The momentum of the car is 35000 kgm/s.

Linear momentum, translational momentum, or simply momentum is the product of the mass and velocity of an object. It is a vector quantity, possessing a magnitude and a direction.

If m is the mass and v is the velocity of an object, then the object's momentum p is given below.

[tex]p = mv[/tex]

Given that the mass of the car is m=1,000 kg and travels at v=35 m/s. The momentum is given below.

[tex]p = 1000 \times 35[/tex]

[tex]p = 35000 \;\rm kg m/s[/tex]

Hence we can conclude that the momentum of the car is 35000 kgm/s.

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if Circle one 100 g (least massive) and 200 g (most massive) have the same material then the least massive i.e 100g heat faster.

The amount of heat required to raise the temperature of an object is proportional to its mass. Specifically, the heat required is given by,

the formula

Q = m × c × ΔT

Where Q= is the amount of heat required

m= is the mass of the object

c= is the specific heat capacity of the material, and ΔT is the change in temperature.

If the two samples are made of the same material and have the same initial temperature, their specific heat capacities and the change in temperature will be the same.

Then, the amount of heat required to raise the temperature of the 100 g sample will be half that of the 200 g sample. This means that the 100 g sample will heat up more than the 200 g sample, as it requires less heat to raise its temperature.

Therefore, The sample with 100 g (least massive) will heat up faster than the sample with 200 g (most massive) if both samples are made of the same material and have the same initial temperature.

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Answer:

Inertia

Explanation:

The term for the tendency is inertia.

The inertia of a body is the tendency of the body to remain unmoved when at rest and the tendency to keep moving when in motion. In other words, it is the tendency of a body to remain in a state of rest or motion.

A static body will remain in a state of perpetual rest if no force acts on it and a moving body will keep moving in the same direction if no force acts on it. The force that needs to be overcome in order to change the state of the object is otherwise known as inertia force.

Answer:

Both are chemical change as the new product is formed with new characteristics and can't be brought back to previous form.

Answer:

post secondary certificate.

Explanation:

Answer:

post secondary certificate sorry that you got it wrong

Explanation:

Answer:

The bicyclist goes at 5 m/s

Explanation:

Motion With Constant Acceleration

It's a type of motion in which the velocity of an object changes uniformly in time.

The equation that rules the change of velocities is:

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

Where:

a   = acceleration

vo = initial speed

vf  = final speed

t    = time

It's given a bicyclist is traveling at v0=+25 m/s and decelerates at [tex]a=-4\ m/s^2[/tex]. We are required to calculate the speed after t=5 seconds.

Applying the formula:

[tex]v_f=25+(-4)*5[/tex]

[tex]v_f=25-20=5[/tex]

[tex]v_f=5\ m/s[/tex]

The bicyclist goes at 5 m/s

Answer:

Genetic variation is an important force in evolution as it allows natural selection to increase or decrease frequency of alleles already in the population.

rate the ans plz.

Answer:

yes,  majority of the weight will be supported by the front wheel and not by you.

Explanation:

Answer:

B: transmission

Explanation: Transmission of waves occurs when waves pass through a given point or medium. Sound waves are transmitted through solids, liquids, and gases therefore the answer is the transmission

Answer:

When it is accelerating or gaining velocity.

Explanation:

A car show positive acceleration when it is accelerating or gaining velocity. It would show negative acceleration if it was de-accelerating, slowing down or coming to a stop.

Answer:

When the velocity is increasing in the positive direction

Explanation:

Answer:

As the temperature increases, the kinetic energy of the molecules of the liquid increases.

Explanation:

Answer:

accelerating upward as it leaves the first floor.

Explanation:

When a person moves up in the elevator, the person's apparent weight is less then the actual weight. The person feels less weight than his or her actual weight. But just before the elevator starts moving the apparent weight of the person is equal to the normal or actual weight of the person before the movement. And after moving up in the elevator, the apparent weight is less than the actual weight, as one is moving against the force of gravity.

So in the context, the student exerts greatest force on the 1st floor as the elevator is accelerating upward when it leaves the first floor.

Explanation:

Using Snell's Law, we have 1sin45° = nsin32°.

=> n = sin45° / sin32° = 1.33.

The refractive index of water is 1.33.

Answer:

The heat produced is 1568 J

Explanation:

The given parameters are;

The mass of the person, m = 80 kg

The height from which the person falls, h = 2 m

Mechanical Energy, ME = Potential Energy, PE + Kinetic Energy, KE

At the height, from where the person falls, the initial velocity of the person = 0 m/s

Therefore;

The initial kinetic energy, K.E. = 1/2·m·v² = 1/2 × 80 kg × (0 m/s)² = 0 J

From which we have;

The Mechanical Energy, M.E. = The initial Potential Energy, P.E. + 0 J

∴ The Mechanical Energy, M.E. = The initial Potential Energy, P.E.

The initial Potential Energy, P.E. = m·g·h

Where;

m = The mass of the person

g = The acceleration due to gravity ≈ 9.8 m/s²

∴ The initial Potential Energy, P.E. = 80 kg × 9.8 m/s² × 2 m = 1568 J

The Mechanical Energy, M.E. = The initial Potential Energy, P.E. = 1568 J

The whole mechanical energy is converted into heat energy, therefore, we have;

The Mechanical Energy, M.E. = The heat energy = 1568 J

The heat produced = The heat energy = 1568 J.

No mechanical waves cannot travel in a vacuum

Answer:

The first one is: His weight on the Earth before take-off and the weight after take-off back on Earth once he gets back should be recorded as his Independent variable and his dependent variable.

The second one is: If he gained the weight back that he had lost while on the trip then you should disregard them unless that was the weight he was when he weighed himself after he got back.

The Third one is: The mass of an object is the amount of matter it contains, regardless of its volume or any forces acting on it. … Gravity is a force that attracts objects toward the Earth. The weight of the object is defined as the force caused by gravity on a mass.

Explanation:

I took  the quiz earlier. Hope this Helps you.

Answer:

swim with flotation device

Explanation:

Answer:

Explanation:

Acceleration roughly means “change in velocity.” If this change in velocity is consistently in one direction, the body will reach a point at which its velocity is zero.

Another consideration is when you drop a basketball onto the pavement. The ball falls, hits the ground, and comes back up. Because its direction of motion changed, you know that its velocity MUST have been 0 m/s at some point during the bounce.

This doesn't mean there was no acceleration at this point.

The question is incomplete, however, The velocity of a vehicle is typically expressed relative to ground.

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Answer:c a b I think I might be wrong but I’m pretty sure that’s it

Explanation: