A skier reaches the bottom of a slope with a velocity of 12 meters per second north. If the skier comes to a complete stop in 3 seconds, what is the acceleration
Answers
The skier's acceleration is 4 meter per square seconds in south direction.
What is acceleration?
Acceleration is the rate at which speed and direction of velocity vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates.
Even if the speed is constant, motion on a circle accelerates because the direction is always shifting. Both effects contribute to the acceleration for all other motions.
Acceleration is a vector quantity since it has both a magnitude and a direction.
The skier's acceleration is = change in velocity ÷ time interval
= ( final velocity - initial velocity) ÷ time interval
= (0 m/s - 12 m/s) ÷ 3 seconds
= - 4 meter per square seconds.
Hence, the skier's acceleration is 4 meter per square seconds in south direction.
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Answer:
A skier reaches the bottom of a slope with a velocity of 12 meters per second north. If the skier comes to a complete stop in 3 seconds. A. 36 m/s (squared) north
Explanation:
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Which of the following statements expresses what we mean by a scientific theory? A.) An educated guess.B.) A simple model that explains a wide variety of phenomena and that has survived repeated tests. C.) An explanation for a physical phenomenon, an explanation that hasn't been tested yet.
Which of the following best defines the science of separating color wavelengths?a. spectroscopy b. color-detection c. photo-chemistry d. spectrophotometry
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The moon surface is visible to an observer on earth due to the gravitational force that attracts the moon to the earth. The more massive the body is, the more the smaller body is attracted to the larger body. We can only see the side of the moon due to the speed at which the moon rotates.
Answers
Answer:
mass
Explanation:
The density of a substance is defined as the ratio of mass of the substance to the volume of the substance.
It is a scalar quantity.
Its SI unit is kg/m^3.
By comparing the densities we get the idea about how dense the substance is.
For example, cotton and iron, the density of cotton is much less than iron so the cotton is less dense than iron.
The relative density is defined as the ratio of density of substance to the density of water at 4 degree C.
The density of water is maximum at 4 degree C.
Final answer:
Density is the mass per unit volume.
Explanation:
Density is a physical property of matter that describes the mass of a substance per unit volume. It is typically expressed in units like grams per cubic centimeter or kilograms per cubic meter. Density helps identify and compare substances, as objects with higher density are heavier for a given volume, while less dense substances are lighter.
Density is the mass per unit volume of a substance or object, defined as p = m/V. The SI unit of density is kg/m³. For many situations, grams per cubic centimeter (g/cm³) are used for the densities of solids and liquids, and grams per liter (g/L) are used for gases.
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B. absolute zero.
C. evaporation.
D. condensation.
Answers
You can easily notice this happen on Air conditioning devices, where the cold gaseous air is turned into water that drips from the air conditioning unit due to condensation.
By definition we have to:
In physics, condensation is a change of state by which a substance passes from a gaseous state to a liquid state.
For example, in a refrigeration cycle, the refrigerant leaves the compressor in the gaseous state, from here, it enters the condenser, a state change called condensation occurs and the refrigerant leaves in liquid form. This process is useful in air conditioners.
Answer:
The process in which a substance changes from a gaseous state to the liquid state is:
D. condensation.
B) fix leaky faucets
C) overwater your lawn
D) let the water run while you brush your teeth
E) use a broom to sweep your driveway ins
Answers
The other options don't contribute to helping the drought, if anything, it makes it worst.
Answer:
fix leaky faucets
use a broom to sweep your driveway instead of spraying it with a hose
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B. increased biodiversity
C. increased acid rain
D. decreased ecosystem disruption
Answers
Answer:
c
Explanation:
Answers
Answer :
1) Luster → the shininess of a material
2) Freezing point → temperature at which a liquid becomes a solid
3) Viscosity → the measure of a substance's resistance to flow
4) Solubility → ability to dissolve in another substance
5) Ductility → able to be pulled into a wire
Explanation :
Luster : It is defined as the material which has the shining property.
Freezing point : It is the temperature at which the phase changes from liquid state to solid state at low temperature.
Viscosity : It measures the resistance of the liquids to flow .
Solubility : It is defined as the ability of a substance (solute) to dissolve into a liquid (solvent).
Ductility : It is defined as the ability of a metal into a thin wire without breaking.
Final answer:
The physical properties are correctly matched as: Luster corresponds to the shininess of a material, freezing point is the temperature at which a liquid becomes solid, viscosity is the measure of a substance's resistance to flow, solubility is the ability to dissolve in another substance, and ductility refers to a substance's ability to be pulled into a wire
Explanation:
The correct matches for the physical properties and their descriptions are as follows:
- Luster is the shininess of a material.
- Freezing point is the temperature at which a liquid becomes a solid.
- Viscosity is the measure of a substance's resistance to flow.
- Solubility is the ability to dissolve in another substance.
- Ductility is the property to be pulled into a wire.
It's crucial to understand these properties in chemistry, as they help us identify and characterize different substances.
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