A substance has a melting point of 0 degrees celsius and a boiling point of 100 degrees celsius. The substance is most likely a.) water
b.) hydrogen
c.) gold
d.) table salt

Answers

Answer 1

Answer: The correct answer is A. The parameters laid out here describe water,which has a melting point of 0 degrees Celsius and a boiling point of100 degrees Celsius. These descriptors are not true of any of thealternative answers.

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What does Lenz's law mean?

Answers

named after the physicist Heinrich Lenz who formulated it in 1834, says: The direction of current induced in a conductor by a changing magnetic field due to Faraday's law of induction will be such that it will create a field that opposes the change that produced it.

Very popular in electromagnetism physics

The induced current in a loop is in the direction that creates a magnetic field thatopposes the change in magnetic flux through the area enclosed by the loop(That is, the induced current tends to keep the original magnetic flux through the circuit from changing). This is what Lenz's law states.

1380 kg car is moving due east with an initial speed of 27.0 m/s. after 8.00 s the car had showd dwn to 17.0 m/s. find the magnitude and direction of the net force that produces the deceleration

Answers

Answer:

magnitude of force is 1725 N

direction is opposite to the direction of car moving i.e west

Explanation:

Given data

car mass = 1380 kg

speed = 27.0 m/s

time = 8 s

speed = 17 m/s

to find out

magnitude and direction of the net force

solution

we find here first acceleration thats formula is

a = v(initial) - v(final) / time

a =27 - 17 / 8

acceleration = 1.25 m/s

so force is = ma

force is = 1380 ( 1.25)

force = 1725 N

so magnitude of force is 1725 N

and this is here direction is opposite to the direction of car moving i.e west

Final answer:

The net force that leads to the deceleration of the 1380 kg car from 27.0 m/s to 17.0 m/s over 8.00 seconds has a magnitude of 1725 N and is directed towards the west.

Explanation:

To solve for the magnitude and direction of the net force that produces the deceleration in the car, you first need to calculate the acceleration and then use it to find the net force using the formula f = m * a. The acceleration here represents a deceleration because the speed is decreasing.

Acceleration can be found using the formula a = (v_f - v_i) / t. Here, v_i is the initial speed (27.0 m/s), v_f is the final speed (17.0 m/s), and t is the time interval (8.00 s). This gives you a = (17.0 m/s - 27.0 m/s) / 8.00 s = -1.25 m/s^2. The negative sign represents deceleration.

Now, apply this deceleration to the formula for force, f = m * a. Here, m is the mass of the car (1380 kg) and a is the value we computed (-1.25 m/s^2). So, f = 1380 kg * -1.25 m/s^2 = -1725 N. The negative sign indicates that the force is in the direction opposite to the initial motion of the car. Therefore, the magnitude of the net force is 1725 N, and the direction is towards the west or opposite to the car's original path.

Learn more about Net Force Calculation here:

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which one would have more gravitational mass? one kilogram of iron dropped from 200 meters height or one kilogram of paper on the ground?

Answers

Neither of those objects has more or less mass than the other has. The mass of an object does not depend on its motion or its location. Mass is Mass. The unit of mass is the kilogram. One kilogram is one kilogram. Their masses are equal.

the piece of paper because gravitational forces between 2 objects depend on the distance between their centre points and the mass, so since they are both the same mass, then the only factor which would determine the force is the distance. The distance between the centre of the earth and the paper is smaller than the iron, so the force would be greaater

The what is s measure of the number of waves that pass a point in a given amount of time

Answers

The 'frequency' is the number of waves that pass a point in one second.

If the given amount of time is, say, 'Q' seconds, then the number of waves
that pass a point in the given amount of time is (Q) times (the frequency).

Frequency is the number of waves that pass a given point in a certain amount of time.

What is the acceleration of a ball traveling horizontally with an initial velocity of 20 meters/second and, 2.0 seconds later, a velocity of 30 meters/second?

Answers

v o = 20 m / s ( initial velocity )
t = 2.0 s
v = 30 m / s
a - acceleration:
v = v o + a t
a t = v - v 0
a = ( v - v o ) / t
a = ( 30 m/s - 20 m/s ) / 2 s = 10 m / s : 2 s = 5 m/s²

The distance-time graph for a vehicle standing on a road side will be