A pet turtle moves 30.1 mm in 72s. how slow is it moving? is this a speed or a velocity?

Answers

Answer 1

Answer:

The pet turtle is moving at a certain speed, and to determine how slow it's moving, we can calculate its speed.

Speed is a scalar quantity, which means it only has magnitude and no direction. Velocity, on the other hand, is a vector quantity and includes both magnitude and direction.

To calculate the speed of the turtle, you can use the formula for speed:

Speed (S) = Distance (D) / Time (T)

In this case, the turtle moves 30.1 mm in 72 seconds:

S = 30.1 mm / 72 s

To make the units more convenient, we can convert millimeters to meters (1 meter = 1000 millimeters):

S = (30.1 mm / 1000) m / 72 s

S ≈ 0.000301 m / 72 s

Now, let's calculate the speed:

S ≈ 0.00000418056 m/s

So, the pet turtle is moving at a speed of approximately 0.00000418056 meters per second.

It's important to note that this is indeed a speed, not a velocity, because it only provides the magnitude of the motion (how fast it's moving) without specifying a direction.

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An abattoir has a mass of 100 g. What will be the total mass if 100 ml of water and 50 ml of oil are added?

Answers

Answer:

The total mass of the abattoir is 100 grams. When you add 100 ml of water and 50 ml of oil, you need to consider the density of these substances to calculate their mass.

The density of water is approximately 1 gram per milliliter (g/ml). So, 100 ml of water has a mass of 100 grams.

The density of oil can vary depending on the type, but for a rough estimate, we can assume it's around 0.9 grams per milliliter (g/ml). So, 50 ml of oil has a mass of 50 x 0.9 = 45 grams.

Now, you can calculate the total mass:

Total mass = Mass of abattoir + Mass of water + Mass of oil

Total mass = 100 grams + 100 grams + 45 grams

Total mass = 245 grams

The total mass when 100 ml of water and 50 ml of oil are added to the abattoir will be 245 grams.

Explanation:

A railway train 50 m long passes over a bridge 250 m long at the rate of 12 km/h.How long will it take completely pass over the bridge?

Answers

From the instant when the nose of the locomotive reaches the beginning of the
bridge, it has to travel the whole 250m to get to the other end of the bridge, and
then it has to travel another 50m to get the rest of the train off the bridge. So it
has to travel 300m to get everything it's pulling across the bridge.

Time = distance/speed = 300m / (12,000 m/hr) = 0.025 hour = 1 minute 30 sec

Pretty slow that train ;)

t=s/v
v=12 km/h=10/3 m/s
s=250+50=300 m

t=300/(10/3)
t=300*3/10
t=30*3
t=90 s=1.5 min

When Jane drives to work, she always places her purse on the passenger’s seat. By the time she gets to work, her purse has fallen on the floor in front of the passenger seat. One day, she asks you to explain why this happens in terms of physics. What do you say?

Answers

Explanation: There may be different explanations:

Suppose that Jane's car has a built some sped, and she sees a stoplight. Now she needs to stop the car (decelerating the car)

When she does this, she creates a force that holds the car until it is full stop, but this force is applied only on the car, the purse that is on the passenger seat only feels this force by the friction that the seat does in his surface, but the purse has built some moment because it was inside the car, and the friction force that the seat does may not be enough to also stop the purse. So when Jane stops, the purse keeps moving forward, and then it falls down of the seat.

At some time during her drive she backed up with a substantial negative. ( backwards) acceleration. Since the pocket book is not physically connected to the seat it is free to move. Upon rapid negative acceleration the pocket book remains in its position while the car accelerates backwards away from it. this demonstrates Newtons 1st law of motion. The first law is the law of inertia. Which states, an object at rest. ( pocketbook) will remain at rest and an object in motion will continue in motion at constant velocity, unless acted upon by some outside force to change its motion.

An object is moving to the right and speeding up. Its acceleration isA. positive
B. Negative
C. zero

Answers

Answer:

Positive

Explanation:

Answer:

positive

Explanation:

i'm reallt sorry if I'm wrong

Index fossils are the remains of species that were once abundant and

Answers

The question is asking to complete the sentence: index fossils are the remains of species that were once abundant and (...). Index fossils are used to be able to see that a certain layer of soil was from a particular period of time. This means that they could not have lived long - just for a short period in the geological history. Typically, index fossils were also geographically widespread, but it's not always the case

Answer:

Geographically Widespread

The air you breathe is made of 21% oxygen and 78% nitrogen. The oxygen in air is the _____ and the nitrogen is the _____. solution, solute solute, solvent solvent, solution

Answers

solute, solvent.

Solute is what is dissolved in the solvent. Since there is less oxygen and more nitrogen, the oxygen is the solute and the nitrogen the solvent. Solution is not included in the answer because the air is the solution (the combination of the solutes and solvent).

None of the choices is correct.
Air is a mixture, NOT a solution.
There are no solvents or solutes in a mixture.

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