Basic Physics Questions and Answers

Which of the following explains why blue light refracts differently than red light through a glass prism Blue light has a Oshorter wavelength and glass s index of refraction is greater at this wavelength causing it to slow down and bend more longer wavelength and glass s index of refraction is greater at this wavelength causing it to slow down and bend more longer wavelength and glass s index of refraction is lower at this wavelength causing it to slow down and bend less shorter wavelength and glass s index of refraction is lower at this wavelength causing it to slow down and bend less

An astronaut flying at 0 65c takes a 3 0 h sleep period How long does mission control think the astronaut has slept 4 6 h 3 6 h 3 9 h 2 3 h 3 0 h

An scientist user a bathroom scale to measure their weight while riding an elevator How will the reading on the bathroom scale compare to the normal reading for the following sequences of the elevator s motion 1 Elevator starts to descend 2 elevator descends at a constant velocity 3 elevator stops Lighter normal heavier Lighter normal lighter Heavier normal heavier Lighter lighter heavier

What is the term for an object that absorbs all the radiation that hits it Albedo de Broglie wavelength Anti matter Black body

Which of the following is a term for the product of mass and velocity in a specific direction Elasticity Momentum Impulse Work

Why can you not use the E mgh formula to calculate gravitational potential energy of objects in space This formula indicates that in space where gravity is zero the potential energy of objects must be zero as well which is incorrect Gravitational potential energy decreases as you move further from the Earth s surface and at great heights such as space this formula shows an increase in potential energy Regardless of an object s distance from the Earth s surface gravitational potential energy is always a negative number and this formula is missing that sign In space the gravitational potential energy of an object does not depend on its mass

Felectrostatic According to Coulomb s Law doubling the distance between two charges will change the force by a factor of 1 1 2 2 2 3 1 4 4 4 KQ Q2 r2

r 9 76 inches a How many inches will the weight in the figure rise if the pulley is rotated through an angle of 72 50 b Through what angle to the nearest minute must the pulley be rotated to raise the weight 6 in

Listen The SI unit for charge is the 1 newton 2 joule 3 ampere 4 coulomb ay

Two hikers set out from the same spot and arrive at the same destination but they take different routes Which of the following quantities must be the same for the hikers Distance Average velocity Acceleration Average speed Displacement

Cart A has a mass of 75 kg and is initially moving to the right with a speed of Cart B is initially at rest and its mass is not known Consider all motion to the right as being positive Assume that during the collision interval the two carts exert a constant repulsion of 150 N on each other Initial direction of motion A A 450 kg m s 0 kg m s 230 kg m s Initially at rest What is the total momentum of carts A and B relative to the table after the collision 310 kg m s www www Horizontal frictionless table B It cannot be determined without additional information

What causes the changing ocean tides Refraction of light from the ocean s surface Earth s gravitational force on the ocean Sun s electromagnetic radiation Moon s gravitational force on the Earth

Which of the following is required to investigate Hooke s Law Pulley Screw Spring Wheel Wedge

What is the thinnest soap bubble that will minimize the reflection of red light with a wavelength of 655 nm Air Water Air 246 nm 123 nm 328 nm 164 nm no 1 0 n 1 33 n 1 0 B

0 00 1 00 point 0 of 3 attempts 3 minimum steps A jeep and BMW enter a highway running east west at the same exit heading in opposite directions The jeep entered the highway 30 minutes before the BMW did and traveled 7 mph slower than the BMW After 2 hours from the time the BMW entered the highway the car were 306 5 miles apart Find the speed of each car assuming they were driven on cruise control Let a represent the speed of the jeep and ont the speed of the BMW Give your answer as an ordered pair x y

At t 0 a stationary police car is passed by a speeding sports car This occurs on a straight highway Their subsequent velocities are shown in a t graph 40 30 Onegative after 30 s 20 10 0 20 40 constant for the entire time police car sports car 60 80 equal to the sports car at approximately 25 s Use the information in the graph to complete the statement To acceleration of the police car is O not available with the given information O constant during the first 30 s 100 t s

Which of the following symbols does not appear in the formula for Coulomb s Law 1 Q 0 2 d 3 F 0 4 k 5 C

The quantity of electric potential is defined as the amount of 1 potential energy per charge 2 electric potential energy 3 force acting upon a charge force per charge 4

A spring with a constant force of 2 60 104 N m compresses 5 20 cm when stepped on by a boxer What is the mass of the boxer 125 kg 65 0 kg 138 kg 1670 kg 142 kg

A pedestrian is running at his maximum speed of 6 0 m s trying to catch a bus tha stopped at a traffic light When they are 16 m from the bus the light changes and the bus pulls away from the pedestrian with an acceleration of 1 0 m s If the pedestrian catches the bus at t 4 0 the speed of the bus at that moment would be 4 0 m s 6 0 m s 16 m s 2 0 m s 8 0 m s

Listen IT PU Both Coulomb s Law and Newton s Law of Gravitation 1 are inverse square equations 2 has a constant 3 are directly related to the product of the numerator 4 are inverse equations 5 are based on charges 6 are based on masses 7 are only attractive forces 8 show that as distance increases the force decreases

The leaning tower of Pisa is about 56 meters tall A ball released from the top takes 3 4 seconds to reach the ground The final velocity of the ball before it hits the ground is 33 meters second Assuming that the ball experienced a constant acceleration throughout this descent calculate the magnitude of the acceleration OA 9 8 meters second OB 9 7 meters second OC 112 2 meters second O D 0 10 meters second

A 6 0 kg mass is moving due east with a uniform speed of 7 0 m s It suddenly explodes into two parts having masses of 4 0 kg and 2 0 kg Just after the explos the 2 0 kg mass has a velocity of 12 m s due east relative to the Earth s surface What is the speed of the 4 0 kg mass relative to the Earth s surface 6 0 m s 4 5 m s 9 0 m s O 12 m s 24 m s

Listen Stephanie s hair stands up on end when she takes off her hat The reason her hair stands up is because 1 each strand of hair becomes positively charged and hair is a good conductor O2 each strand of hair becomes positively charged and she is in a strong electric field 3 each strand of hair becomes positively charged and hair strands are at a high voltage O E RSS dan blagajn

a vertical wall and rebounds with a horizontal velocity of 2 5 m s to the left as illustrated in the diagram H What is the magnitude of the change in momentum of the ball in kg m s O 11 18 3 5 9 5 7 5

If an arrow s mass is tripled and the speed is halved the momentum is changed by a factor of 0 75 0 5 02 1 5

Electrical forces between objects are normally strongest when the charges are 1 close together 2 far apart

If you comb your hair and the comb becomes negatively charged your hair becomes 1 uncharged 2 positively charged 3 negatively charged

The Law of Universal Gravitation and Coulomb s Law for electrostatic forces are often compared because both of these forces are affected by certain quantities that describe objects mass for gravity and for electrostatics and the distance between those objects While there are similarities there are also important differences Which answer most completely describes the difference s between the gravitational force and the electrostatic force Gravitational Force m1 x m d FG G Electrostatic Force Q x Qz d FE k The gravitational force occurs throughout the universe but the electrostatic force only occurs on Earth The gravitational force is much weaker than the electrostatic force The gravitational force is weaker and can only attract objects but the electrostatic force is strong and can both attract and repel The gravitational force can only attract but the electrostatic force can attract or

The value of k the electrical constant in Coulomb s Law O 1 depends on the separation distance between the two charges O2 is impossible to determine 3 is different when used to determine the electric field strength instead of the electric force 4 never changes 5 depends on how many charged particles are present

Bring a charged object near a conductor and the momentarily touch the conductor This demonstrates charging by 1 electrification 2 conduction 3 induction 4 polarization

V objects will always attract charged objects are materials through which a charge will not easily move A volt is equal to is the study of electrical charges that can be collected and held in one place The unit of charge is The unit of force is The unit for electric field is Charge by 1 electrostatics 2 neutral 3 conduction 4 Insulators 5 Coulomb 6 Newton 7 Newtons per Coulomb 8 Joule per Coulomb

2 8 A solid fuel rocket booster is designed to consume its rate of 340 kg sec and to produce 925 000 Newtons of thrust What must the average exhaust velocity be 3 9 decades ago had a launch mass of 2 800 000 kg implying that it weighed 27 400 000 N when launched from the Kennedy Space Center in Florida where g 9 79 m s At launch its five Rocketdyne F 1 engines produced 34 500 000 N of upward thrust a At the moment of launch what was the net force acting upon the rocket b In what direction did this net force act c What was the resulting upward acceleration at the time of launch

Data from a projectile motion experiment is shown below There are three trials Each trial had a different launch angle Calculate the launch speed for each trial and use that value to calculate the Mean Launch Speed Also calculate the standard deviation Record your results in the cell in the lower right hand corner of the table Show a sample one calculation for the launch speed and the calculation for the standard deviation Sample calculation 5 pts each each blank in table 1 pt 34 pts total Trial 2 3 Range 1 m Launch Angle 2 5 4 4 5 0 20 30 45 Launch Speed

25 J of work are done to push a 0 1 C charge from point A to point B in an electric field What is the potential difference between points A and B 02 5 volts 2 25 x 10 1 volts 06 4 x 10 18 volts 250 volts

Question 8 4 points Listen Two positively charged objects will 1 repel each other O2 have no effect on each other 3 attract each other 4 first attract touch then repel each other

oks from Amazon com and bn com on November 25 2006 For each book he recorded the name of the principal author the title the ISBN the Amazon selling price in dollars and he B N selling price in dollars author De Veaux Christensen Thomas Stewart Simmons Alexander Miller Cheeseman Berg Raymond Atkins Warren Kieso Garrison title Intro Stats Introduction to Statistics Calculus Calculus Calculus with Analytic Geometry American Public School Law Business Law Today Business Law Biochemistry General Organic and Biological Chemistry Chemical Principles Financial Managerial Accounting Intermediate Accounting Vol 1 Managerial Accounting ISBN Amazon B N 321286715 120 67 103 20 155459651 164 95 155 95 321185587 154 67 152 00 534393217 153 98 155 75 70576424 150 00 159 75 115 85 534274242 128 95 324204841 108 95 103 95 131984934 166 67 159 60 716787245 149 95 148 91 471447072 95 95 98 95 071675701X 141 95 139 75 324188013 158 95 145 95 471771929 102 95 107 00 72834943 134 69 147 96 mpute the correlation between Amazon price and B N price for these textbooks Assume the correlation roct 0 001

In a good insulator electrons are usually 1 not moving at all 2 free to move around 3 semi free to move around 4 free to move around after an impurity has been added 5 tightly bound in place

2 A membrane of thickness b 5x10 m is polarized with the potential difference across the membrane is 80 mV 12 points a Find the electric field inside the membrane b The Charge density on the outside layer if the membrane c The pressure exerted by one side on the other Compare the pressure to the atmospheric pressure d The capacitance per unit area of the membrane

O Its scientific political and economic superiority in contrast to medieval Europe O Its strategic geographical location between the Mediterranean World and North Africa O The revenues from its conquests in Central Europe Its ability to build a prosperous multi cultural society

A 1 5 V battery transfers 400 C of charge to run an electrical device How much work is done to do this 1 266 67 J 2 600 J 3 0 00375 J 4 9001

Which of the following statements is true concerning the electrostatic charge on a balloon 1 Balloons cannot become charged 2 The charge is only in the center of the balloon 3 The charge is only on the surface of the balloon 4 The charge completely penetrates the balloon

Which of the following items are electrical insulators 1 quartz 2 bronze 3 diamonds 4 plastic 5 glass 6 mercury 7 copper 8 iron 9 gold

Felectrostatic p2 Two 0 025 C positive particles separated by a distance of 0 25 m Choose the answer that is correct for both the magnitude of the force between them and direction of the force between them 1 9x10 c attractive O 2 9x10 c repulsive 3 9x10 c attractive 4 9x10 c

5 A Ferris wheel has a radius of 22 m and rotates at the rate of one revolution every 120 s At the bottom of the ride the passenger is 4 m above the ground You start your ride from the bottom of the wheel a Determine the equation of a function that represents your height h above the ground at any time t 4 marks

6 Under what conditions does the Residence Lien Restriction and Lien Recovery Fund Act protect property owners from paying twice for labor and materials a if the property owner pays the contractor but the contractor does not pay the subcontractors b if the property owner does not pay the contractor c if the property owner disapproves of the quality of the work d if the property owner does not pay the subcontractors

From the details stated in the poem Ozymandias what do subjects expect from their king O Spend royal treasury for the benefit of the people O Show compassion and care the subjects O Work on ways for the development of the country O All of the choices

Write an equation for the height of the point P above the ground as a function of t time in seconds h t A wheel with radius 3 cm is being pushed up a ramp at a rate of 5 cm per second The ramp is 630 cm long and 260 cm tall at the end A point P is marked on the circle as shown picture is not to scale P 630 cm 260 cm

41 A 92 kg bungee jumper steps off of a platform that is 84 meters above a river At their lowest point the jumper just barely touches the surface of the water The spring constraint of the bung cord is 317 N m Draw qualitative energy pie charts for the following parts of the jump The system is the person ear and bungee cord Ignore friction and air resistance A Standing on platform O B Mid jump 4 m above water O b Determine the stretch of the bungee cord when at the lowest point What is the unstretched length of the bungee cord C Lowest point O

The position versus time plot of a boat positioning itself next to a dock is shown in the figure Figure 1 Figure B C E 1 of 1 Rank the six points indicated in the plot in order of increasing value of the velocity u starting with the most negative Rank the six points in order of increasing value of the velocity To rank items as equivalent overlap them the most negative A B C D E F The correct ranking cannot be determined Reset the most positive