Salt water is more dense than fresh water. A ship floats in both fresh water and salt water. Compared to the fresh water, the volume of water displaced...
A piece of wood is floating in a bathtub. A second piece of wood sits on top of the first piece, and does not touch the water. If the top piece is taken off and placed in the water, what happens to the water level in the tub?
A piece of wood is floating in a bathtub. A second piece of wood sits on top of the first piece, and does not touch the water. If the top piece is taken...
One day, while swimming below the surface of the ocean, you let out a number of bubbles of air from your mouth. As the bubbles rise toward the surface, their diameters will
One day, while swimming below the surface of the ocean, you let out a number of bubbles of air from your mouth. As the bubbles rise toward the surface,...
The SI unit of pressure is
The SI unit of pressure isAnswer: Pa, N/m^2, kg/m^2/...
In the ideal gas formula, temperature must be measured in what unit?
In the ideal gas formula, temperature must be measured in what unit?Answer:&nbs...
A rock is suspended from a scale reads 10.0 N. A beaker of water is raised up so the rock is totally submerged in the water. The scale now reads 6.25 N. What is the density of the rock?
A rock is suspended from a scale reads 10.0 N. A beaker of water is raised up so the rock is totally submerged in the water. The scale now reads 6.25...
How many atoms are there in a mole of Hydrogen (H2) gas?
How many atoms are there in a mole of Hydrogen (H2) gas?Answer: 1.20×10...
You are originally 1.0 m beneath the surface of a pool. If you dive to 2.0 m beneath the surface, what happens to the absolute pressure on you?
You are originally 1.0 m beneath the surface of a pool. If you dive to 2.0 m beneath the surface, what happens to the absolute pressure on you?Answer: It...
50 cm3 of wood is floating on water, and 50 cm3 of iron is totally submerged. Which has the greater buoyant force on it?
50 cm3 of wood is floating on water, and 50 cm3 of iron is totally submerged. Which has the greater buoyant force on it?Answer: the i...
A steel ball sinks in water but floats in a pool of mercury. Where is the buoyant force on the ball greater?
A steel ball sinks in water but floats in a pool of mercury. Where is the buoyant force on the ball greater?Answer: floating on the merc...
"An external pressure applied to an enclosed fluid is transmitted unchanged to every point within the fluid" is known as
"An external pressure applied to an enclosed fluid is transmitted unchanged to every point within the fluid" is known asAnswer: Pascal's princi...
How many atoms are there in a mole of Helium (He) gas?
How many atoms are there in a mole of Helium (He) gas?Answer: 6.02×10...
Substance A has a density of 3.0 g/cm3 and substance B has a density of 4.0 g/cm3. In order to obtain equal masses of these two substances, the ratio of the volume of A to the volume of B will be equal to
Substance A has a density of 3.0 g/cm3 and substance B has a density of 4.0 g/cm3. In order to obtain equal masses of these two substances, the ratio...
Salt water has greater density than fresh water. A boat floats in both fresh water and in salt water. Where is the buoyant force greater on the boat?
Salt water has greater density than fresh water. A boat floats in both fresh water and in salt water. Where is the buoyant force greater on the boat?Answer: Buoyant...
Atmospheric pressure is approximately
Atmospheric pressure is approximatelyAnswer: 1.01×10^5...
How many atoms are there in a mole of Helium (He) gas?
How many atoms are there in a mole of Helium (He) gas?Answer: 6.02×10...
What happens when water at its melting point solidifies to ice without any change in temperature?
What happens when water at its melting point solidifies to ice without any change in temperature?Answer: Latent heat is emit...
Which of the following is true during a phase change?
Which of the following is true during a phase change?Answer: Temperature remains const...
5000 J of heat is supplied in one minute to 0.06 kg of a liquid at its boiling point of 85°C to convert it completely to vapor. Which of the following expressions gives the heat of vaporization of the liquid?
5000 J of heat is supplied in one minute to 0.06 kg of a liquid at its boiling point of 85°C to convert it completely to vapor. Which of the following...
How is energy transferred as heat always directed?
How is energy transferred as heat always directed?Answer: from an object at high temperature to an object at low temperat...
To which of the following is high temperature related?
To which of the following is high temperature related?Answer: high particle kinetic ene...
In the formula Q= mc(deltaT) , which quantity is measured in units of J/g·°C?
In the formula Q= mc(deltaT) , which quantity is measured in units of J/g·°C?Answer:&nbs...
If two small beakers of water, one at 70°C and one at 80°C, are emptied into a large beaker, what is the final temperature of the water?
If two small beakers of water, one at 70°C and one at 80°C, are emptied into a large beaker, what is the final temperature of the water?Answer: The...
Which of the following physical properties can be used to measure temperature using a thermometer?
Which of the following physical properties can be used to measure temperature using a thermometer?Answer: vol...
50 g of ice at 0°C is dropped in a beaker containing 100 g of water at 0°C. What will be the contents of the beaker after 5 hours? Assume that the room temperature is 0°C.
50 g of ice at 0°C is dropped in a beaker containing 100 g of water at 0°C. What will be the contents of the beaker after 5 hours? Assume that the room...
The use of fiberglass insulation in the outer walls of a building is intended to minimize heat transfer through what process?
The use of fiberglass insulation in the outer walls of a building is intended to minimize heat transfer through what process?Answer: conduct...
How many atoms are there in a mole of Hydrogen (H2) gas?
How many atoms are there in a mole of Hydrogen (H2) gas?Answer: 1.20×10...
What happens to the internal energy of an ideal gas when it is heated from 0°C to 4°C?
What happens to the internal energy of an ideal gas when it is heated from 0°C to 4°C?Answer: It increa...
Which of the following best describes the relationship between two systems in thermal equilibrium?
Which of the following best describes the relationship between two systems in thermal equilibrium?Answer: No net energy is exchan...
Energy transferred as heat occurs between two bodies in thermal contact when they differ in which of the following properties?
Energy transferred as heat occurs between two bodies in thermal contact when they differ in which of the following properties?Answer: temperat...
To melt 4 kg of a solid, 10^6 J of heat is required. Which of the following expressions gives the heat of fusion of the solid?
To melt 4 kg of a solid, 10^6 J of heat is required. Which of the following expressions gives the heat of fusion of the solid?Answer: 10^6/4 J...
If energy is transferred from a table to a block of ice moving across the table, which of the following statements is true?
If energy is transferred from a table to a block of ice moving across the table, which of the following statements is true?Answer: The ice is cooler...
Which of the following is proportional to the kinetic energy of atoms and molecules?
Which of the following is proportional to the kinetic energy of atoms and molecules?Answer: temperat...
The figure above shows how the temperature of 10.0 g of ice changes as energy is added. Which of the following statements is correct?
The figure above shows how the temperature of 10.0 g of ice changes as energy is added. Which of the following statements is correct?Answer: The...
Which of the following is a direct cause of a substance's temperature increase?
Which of the following is a direct cause of a substance's temperature increase?Answer: Kinetic energy is added to the particles of the substa...
Which variables should be plotted in order to produce a straight-line graph with the slope equal to k?
The speed of sound v in a gas is related to the pressure of the gas by the expressionv= (kP)^1/2where k is a constant.Which variables should be plotted...
A particle is moving in a circular path of radius r. The time taken for one complete revolution is T. The acceleration a of the particle is given by the expression
A particle is moving in a circular path of radius r. The time taken for one complete revolution is T. The acceleration a of the particle is given by the...
The frequency f is measured for different values of length l and a graph is plotted. Which one of the following will produce a straight line graph?
The frequency of an oscillating system is given byf= (1/2pi)(g/l)^1/2where g and pi are constants.The frequency f is measured for different values of...
The time period T of oscillatioin of a mass m suspended from a vertical spring is given by the expression
The time period T of oscillatioin of a mass m suspended from a vertical spring is given by the expressionT= (2pi)(m/k)^1/2where k is a constant.Which...
Time has been measured such that t = 16.7s ±0.5s. Calculate the value of and uncertainty in t^2.
Time has been measured such that t = 16.7s ±0.5s. Calculate the value of and uncertainty in t^2.Answer: (279±1) ...
0.00325 × 10-8 cm can also be expressed in mm as
0.00325 × 10-8 cm can also be expressed in mm asAnswer: 3.25 × 10^-10...
How many meters is sixty kilometers?
How many meters is sixty kilometers?Answer: 60,000...
How many grams is forty milligrams?
How many grams is forty milligrams?Answer: 0.0 40...
100 mL is equivalent to which of the following?
100 mL is equivalent to which of the following?Answer: 0.1...
Write the number 13.5 gigameters as full (decimal) numbers with standard units.
Write the number 13.5 gigameters as full (decimal) numbers with standard units.Answer: 13,500,000,000...
Write out the number 8.42 × 10^-5 in full with a decimal point and correct number of zeros.
Write out the number 8.42 × 10^-5 in full with a decimal point and correct number of zeros.Answer: 0.0000...
Convert 1.2 × 10^-3 to decimal notation.
Convert 1.2 × 10^-3 to decimal notation.Answer: 0.0...
4567.89 is properly expressed in scientific notation as
4567.89 is properly expressed in scientific notation asAnswer: 4.56789 × 1...
0.0001776 can also be expressed as
0.0001776 can also be expressed asAnswer: 1.776 × 10...
Write the number 0.00045 in power of ten notation.
Write the number 0.00045 in power of ten notation.Answer: 4.5 × 10...
A rectangular garden measures 15 m long and 13.7 m wide. What is the length of a diagonal from one corner of the garden to the other?
A rectangular garden measures 15 m long and 13.7 m wide. What is the length of a diagonal from one corner of the garden to the other?Answer: 20...
A rectangle is 3.25 m long and 1.5 m wide. What is its area?
A rectangle is 3.25 m long and 1.5 m wide. What is its area?Answer: 4.9 ...
The length and width of a rectangle are 1.125 m and 0.606 m, respectively. You calculate the rectangle's perimeter by adding these and multiplying by two. Your calculator's display reads 3.462. To the correct number of significant figures, this should be written as
The length and width of a rectangle are 1.125 m and 0.606 m, respectively. You calculate the rectangle's perimeter by adding these and multiplying by...
The length and width of a rectangle are 1.125 m and 0.606 m, respectively. Multiplying, your calculator gives the product as 0.68175. Rounding properly to the correct number of significant figures, the area should be written as
The length and width of a rectangle are 1.125 m and 0.606 m, respectively. Multiplying, your calculator gives the product as 0.68175. Rounding properly...
What is the result of 2.43 ÷ 4.561 expressed with the correct number of significant digits?
What is the result of 2.43 ÷ 4.561 expressed with the correct number of significant digits?Answer: 5.33 × 10...
What is the product of 12.99 and 4.05 expressed with the correct number of significant digits?
What is the product of 12.99 and 4.05 expressed with the correct number of significant digits?Answer: 5...
What is the difference between 107.7 and 105.29 expressed with the correct number of significant digits?
What is the difference between 107.7 and 105.29 expressed with the correct number of significant digits?Answer: ...
What is the sum of 3.08 + 1.574 + 3.4 expressed with the correct number of significant digits?
What is the sum of 3.08 + 1.574 + 3.4 expressed with the correct number of significant digits?Answer: ...
Which of the following has three significant figures?
Which of the following has three significant figures?Answer: 0.0500...
The number of significant figures in 0.040 is
The number of significant figures in 0.040 isAnswer: ...
The number of significant figures in 0.01500 is
The number of significant figures in 0.01500 isAnswer: f...
The number of significant figures in 10001 is
The number of significant figures in 10001 isAnswer: f...
What is the volume, and its approximate uncertainty, of a sphere of radius 1.96 ± 0.05 m?
What is the volume, and its approximate uncertainty, of a sphere of radius 1.96 ± 0.05 m?Answer: 30 ± 20 ...
What is the percent uncertainty in the measurement 1.25 ± 0.07 cm?
What is the percent uncertainty in the measurement 1.25 ± 0.07 cm?Answer: 5...
What is the conversion factor between cm^2 and m^2?
What is the conversion factor between cm^2 and m^2?Answer: 0.0001 m^2/c...
What is the conversion factor between km/h^2 and m/s^2?
What is the conversion factor between km/h^2 and m/s^2?Answer: 7.72 × 10^-6 m/...
What is the conversion factor between km/h and m/s?
What is the conversion factor between km/h and m/s?Answer: 0.278 ...
The metric prefix for one thousand is
The metric prefix for one thousand isAnswer: k...
The metric prefix for one one-thousandth is
The metric prefix for one one-thousandth isAnswer: mi...
The base SI unit of time is
The base SI unit of time isAnswer: sec...
How many fundamental units does the SI system have?
How many fundamental units does the SI system have?Answer: se...
All of the following are base units of the SI system except:
All of the following are base units of the SI system except:Answer: v...
A useful method of expressing very small or very large numbers is
A useful method of expressing very small or very large numbers isAnswer: scientific notat...
Estimate the number of times an average person's heart beats in a lifetime. Assume the average heart rate is 73 beats/min and a life span of 74 yr.
Estimate the number of times an average person's heart beats in a lifetime. Assume the average heart rate is 73 beats/min and a life span of 74 yr.Answer: 3*10^9...
An elephant has a life expectancy of 60 years. Which of the following gives the order of magnitude of this lifetime?
An elephant has a life expectancy of 60 years. Which of the following gives the order of magnitude of this lifetime?Answer: 10^9...
The molar mass of water is 18g per mole. The approximate number of water molecules in a glass of water is
The molar mass of water is 18g per mole. The approximate number of water molecules in a glass of water isAnswer: 10...
The time interval between human heartbeats is of the order of
The time interval between human heartbeats is of the order ofAnswer: 10^0...
The length of a page of an examination paper is approximately 30 cm. Which of the following gives the order of magnitude for the time taken for light to travel the length of the page?
The length of a page of an examination paper is approximately 30 cm. Which of the following gives the order of magnitude for the time taken for light...
The mass of an electron is 9.1×10^-31kg and that of a proton is 1.7×10^-27kg. Which one of the following is the difference in the order of magnitude of the masses of the electron and the proton?
The mass of an electron is 9.1×10^-31kg and that of a proton is 1.7×10^-27kg. Which one of the following is the difference in the order of magnitude of...
The mass of an atom of the isotope strontium-92 is of the order
The mass of an atom of the isotope strontium-92 is of the orderAnswer: 10^...
The ratio (diameter of a hydrogen atom)/(diameter of a hydrogen nucleus) to the nearest order of magnitude is
The ratio (diameter of a hydrogen atom)/(diameter of a hydrogen nucleus) to the nearest order of magnitude isAnswer: 1...
The order of magnitude of the weight of an apple is
The order of magnitude of the weight of an apple is1Answer: ...
The angle measured counterclockwise from the x-axis to vector A, in degrees, is closest to:
The angle measured counterclockwise from the x-axis to vector A, in degrees, is closest to:Answer: ...
Vector A has length 4 units and directed to the north. Vector B has length 9 units and is directed to the south. Calculate the magnitude and direction of A + B.
Vector A has length 4 units and directed to the north. Vector B has length 9 units and is directed to the south. Calculate the magnitude and direction...
Vector A has magnitude 8.0 m at an angle of 30 degrees below the +x axis. The y-component of A is
Vector A has magnitude 8.0 m at an angle of 30 degrees below the +x axis. The y-component of A isAnswer: -4.0...
Two displacement vectors have magnitudes of 5.0 m and 7.0 m, respectively. When these two vectors are added, the magnitude of the sum
Two displacement vectors have magnitudes of 5.0 m and 7.0 m, respectively. When these two vectors are added, the magnitude of the sumAnswer: could...
The resultant of two vectors is the smallest when the angle between them is
The resultant of two vectors is the smallest when the angle between them isAnswer: 1...
Which of the following is an accurate statement?
Which of the following is an accurate statement?A) The magnitude of a vector can be less than the magnitude of one of its components.B) A vector cannot...
A rectangular garden measures 15 m long and 13.7 m wide. What is the length of a diagonal from one corner of the garden to the other?
A rectangular garden measures 15 m long and 13.7 m wide. What is the length of a diagonal from one corner of the garden to the other?Answer: 20...
Find the resultant of these two vectors: 2.00 × 10^2 units due east and 4.00 × 10^2 units 30.0° north of west.
Find the resultant of these two vectors: 2.00 × 10^2 units due east and 4.00 × 10^2 units 30.0° north of west.Answer: 248 units, 53.9° north of ...
In a coordinate system, a vector is oriented at angle q with respect to the x-axis. The y component of the vector equals the vector's magnitude multiplied by which trigonometric function?
In a coordinate system, a vector is oriented at angle q with respect to the x-axis. The y component of the vector equals the vector's magnitude multiplied...
In a coordinate system, a vector is oriented at angle q with respect to the x-axis. The x component of the vector equals the vector's magnitude multiplied by which trigonometric function?
In a coordinate system, a vector is oriented at angle q with respect to the x-axis. The x component of the vector equals the vector's magnitude multiplied...
For the winter, a duck flies 10.0 m/s due south against a gust of wind with a speed of 2.5 m/s. What is the resultant velocity of the duck?
For the winter, a duck flies 10.0 m/s due south against a gust of wind with a speed of 2.5 m/s. What is the resultant velocity of the duck?Answer: 7.5...
Identify the following quantities as scalar or vector: the mass of an object, the number of leaves on a tree, wind velocity.
Identify the following quantities as scalar or vector: the mass of an object, the number of leaves on a tree, wind velocity.Answer: scalar, scalar,...
Which of the following is an example of a vector quantity?
Which of the following is an example of a vector quantity?A) velocityB) temperatureC) volumeD) massAnswer: A) veloc...
Which of the following is a physical quantity that has a magnitude but no direction?
Which of the following is a physical quantity that has a magnitude but no direction?A) vectorB) scalarC) resultantD) frame of referenceAnswer: A)...
From the triangle shown in Image 1.1, what is the magnitude of angle A (in degrees), if a=120cm and b=215cm?
From the triangle shown in Image 1.1, what is the magnitude of angle A (in degrees), if a=120cm and b=215cm?Answer: ...
From the triangle shown in Image 1.1, what is the length of side c if a = 13cm and b = 22cm?
From the triangle shown in Image 1.1, what is the length of side c if a = 13cm and b = 22cm?Answer: 26...
A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 km/h. What is her average speed for the trip?
A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 km/h. What is her average speed for the trip?Answer: 88 k...
If you run a complete loop around an outdoor track (400 m), in 100 s, your average velocity is
If you run a complete loop around an outdoor track (400 m), in 100 s, your average velocity isAnswer: z...
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