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What is the standard unit of mass used by the scientific community?

Question 1 options:

gram

centigram

milligram

kilogram

Question 2 (3 points)

Which of the following expressions correctly defines a Newton, the standard unit of force used by the scientific community?

Question 2 options:

kg m/s

kg m²/s

kg m/s²

kg m²/s²

Question 3 (3 points)

A bucket filled with gold has a particular mass. Two identical buckets filled with gold will together have

Question 3 options:

twice the mass and twice the density

twice the mass but half the density

twice the mass but the same density

half the mass and half the density

Question 4 (3 points)

Identify the true statement:

Question 4 options:

Speed and velocity are the same and these terms can be used interchangeably.

Velocity is the magnitude (i.e., size) and direction of motion, while speed is only the magnitude of the motion with no direction associated with it.

Velocity is the time rate of change of the speed of a mass.

Speed is the magnitude (i.e., size) and direction of motion, while velocity is only the magnitude of the motion with no direction associated with it.

Question 5 (3 points)

What happens to an object that is released from rest above the surface of the Earth?

Question 5 options:

fall towards the Earth with a constant speed but with a changing velocity.

fall towards the Earth with a changing velocity.

fall towards the Earth with a constant speed and with constant velocity.

fall towards the Earth with a constant velocity but with a changing acceleration.

Question 6 (3 points)

In order for a force to do work on an object, which of the following conditions must be fulfilled?

Question 6 options:

Accelerate and move in a direction perpendicular to the direction of the force.

Move in a direction perpendicular to the direction of the force.

Accelerate and move in a direction parallel to the direction of the force.

Move in a direction parallel to the direction of the force.

Question 7 (3 points)

Identify the true statement regarding energy conservation in an isolated system.

Question 7 options:

The total energy of an isolated system remains constant.

The total kinetic energy of an isolated system remains constant.

The total mechanical energy of an isolated system remains constant.

The total potential energy of an isolated system remains constant.

Question 8 (3 points)

In the context of an automobile engine, how is its power best defined?

Question 8 options:

the rate at which force is delivered to the wheels.

the rate at which torque is delivered to the wheels.

the rate at which angular momentum is delivered to the wheels.

the rate at which energy is delivered to the wheels.

Question 9 (3 points

What does temperature measure in relation to the molecules of a substance?

Question 9 options:

The potential energy of the molecules of a substance.

Kinetic energy of the molecules of a substance.

The momentum of the molecules of a substance.

The heat of the molecules of a substance.

Question 10 (3 points)

To maintain a gas at a constant pressure when heat is removed from it, its volume must

Question 10 options:

be decreased.

be increased.

be reduced to zero.

be kept constant.

Question 11 (3 points

Identify the two fundamental types of wave motion.

Question 11 options:

transverse and latitudinal.

translational and latitudinal.

transitional and longitudinal.

transverse and longitudinal.

Question 12 (3 points)

What characteristic differs among radio waves, microwaves, infrared light, visible light, ultraviolet light, x-rays, and gamma rays in the electromagnetic spectrum?

Question 12 options:

Doppler shifts.

frequencies.

amplitudes.

velocities.

Part II: Exercises (40 points)

• Number of Questions:5
• Point Value:Each exercise is worth 8 points.
• Instructions:To receive full credit for the following questions, ensure you include numerical results with 3 significant figures and appropriate units.

Question 13 (8 points)

Given that the densityof copper is 8.96 g/cm³, determine the mass of a piece of copper (in g) with a volume of (3.04x10^1) cm³.

Note: Your answer is assumed to be reduced to the highest power possible.

Your Answer:

Question 13 options:

	x10
Answer	units

Question 14 (8 points)

Given that an object is dropped from rest and falls a distance of (1.96x10^1) meters, how long will it take to reach the ground, assuming there is no air resistance?

Note: Your answer is assumed to be reduced to the highest power possible.

Your Answer:

Question 14 options:

	x10
Answer	units

Question 15 (8 points

An astronaut with a mass of (7.33x10^1) kg has just landed on the surface of Venus, where the acceleration due to gravity is (8.840x10^0) m/s². What is the gravitational force acting on the astronaut while they are on Venus's surface?

Note: Your answer is assumed to be reduced to the highest power possible.

Your Answer:

Question 15 options:

	x10
Answer	units

Question 16 (8 points)

Calculate the amount of heat energy (in joules) required to raise the temperature of 0.512 kg of water from an initial temperature of (2.1700x10^1)C to a final temperature of (6.46x10^1)C, given that the specific heat of water is 4.1910³J/kgC.

Note: Your answer is assumed to be reduced to the highest power possible.

Your Answer:

Question 16 options:

	x10
Answer	units

Question 17 (8 points)

A sound wave travels through a medium at a speed of (3.0100x10^2) m/s and has a wavelength of (4.00x10^-1) m. What is the frequency of this sound wave?

Note: Your answer is assumed to be reduced to the highest power possible.

Your Answer:

Question 17 options:

	x10
Answer	units

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