Physics

If you are driving 72 km/h along a straight road and you look to the side for 4.0 s, how far do you ...

If you are driving 72 km/h along a straight road and you look to the side for 4.0 s, how far do you ...

If you are driving 72 km/h along a straight road and you look to the side for 4.0 s, how far do you travel during this inattentive period?
A) 18 m
B) 20 m
C) 40 m
D) 80 m

Pd96   205   2 Replies

Pd96

A light-year is the distance that light travels in one year. The speed of light is 3.00 × 108 m/s. ...

A light-year is the distance that light travels in one year. The speed of light is 3.00 × 108 m/s. ...

A light-year is the distance that light travels in one year.  The speed of light is 3.00 × 108 m/s.  How many miles are there in one light-year? (1 mi = 1609 m, 1 y = 365 d)
A) 9.46 × 1012 mi
B) 9.46 × 1015 mi
C) 5.88 × 1012

Pd96   179   2 Replies

Pd96

An object is moving with constant non-zero acceleration in the +x direction. The velocity versus ...

An object is moving with constant non-zero acceleration in the +x direction. The velocity versus ...

An object is moving with constant non-zero acceleration in the +x direction.  The velocity versus time graph of this object is
A) a horizontal straight line.
B) a vertical straight line.
C) a straight line making an angle with the

Pd96   126   2 Replies

Pd96

An object is moving with constant non-zero velocity in the +x direction. The velocity versus time ...

An object is moving with constant non-zero velocity in the +x direction. The velocity versus time ...

An object is moving with constant non-zero velocity in the +x direction.  The velocity versus time graph of this object is
A) a horizontal straight line.
B) a vertical straight line.
C) a straight line making an angle with the tim

Pd96   188   2 Replies

Pd96

An object is moving with constant non-zero acceleration in the +x direction. The position versus ...

An object is moving with constant non-zero acceleration in the +x direction. The position versus ...

An object is moving with constant non-zero acceleration in the +x direction.  The position versus time graph of this object is
A) a horizontal straight line.
B) a vertical straight line.
C) a straight line making an angle with the

Pd96   122   2 Replies

Pd96

An object is moving with constant non-zero velocity in the +x direction. The position versus time ...

An object is moving with constant non-zero velocity in the +x direction. The position versus time ...

An object is moving with constant non-zero velocity in the +x direction.  The position versus time graph of this object is
A) a horizontal straight line.
B) a vertical straight line.
C) a straight line making an angle with the tim

Pd96   133   2 Replies

Pd96

Brick A is dropped from the top of a building. Brick B is thrown straight down from the same ...

Brick A is dropped from the top of a building. Brick B is thrown straight down from the same ...

Brick A is dropped from the top of a building.  Brick B is thrown straight down from the same building.  Neglect air. Which statement about their accelerations is correct?
A) The acceleration of A is greater than the acceleration of B.

Pd96   117   2 Replies

Pd96

Ball A is dropped from the top of a building. One second later, ball B is dropped from the same ...

Ball A is dropped from the top of a building. One second later, ball B is dropped from the same ...

Ball A is dropped from the top of a building.  One second later, ball B is dropped from the same building. Neglect air.  As time progresses, the difference in their speeds
A) increases.
B) remains constant.
C) decreases.

Pd96   129   2 Replies

Pd96

From the edge of a roof top you toss a green ball upwards with initial speed v0 and a blue ball ...

From the edge of a roof top you toss a green ball upwards with initial speed v0 and a blue ball ...

From the edge of a roof top you toss a green ball upwards with initial speed v0 and a blue ball downwards with the same initial speed. Neglect air. When they reach the ground below
A) the green ball will be moving faster than the blue ball.

Pd96   181   2 Replies

Pd96

Two objects are dropped from a bridge, an interval of 1.0 s apart. Neglect air. During the time that ...

Two objects are dropped from a bridge, an interval of 1.0 s apart. Neglect air. During the time that ...

Two objects are dropped from a bridge, an interval of 1.0 s apart. Neglect air. During the time that both objects continue to fall, their separation
A) increases.
B) decreases.
C) stays constant.
D) increases at first, but then st

Pd96   94   2 Replies

Pd96

A 10-kg rock and a 20-kg rock are dropped at the same time and there is no air. If the 10-kg rock ...

A 10-kg rock and a 20-kg rock are dropped at the same time and there is no air. If the 10-kg rock ...

A 10-kg rock and a 20-kg rock are dropped at the same time and there is no air. If the 10-kg rock falls with acceleration a, what is the acceleration of the 20-kg rock?
A) 4a
B) 2a
C) a
D) a/2
E) a/4

Pd96   101   2 Replies

Pd96

A 10-kg rock and a 20-kg rock are thrown upward with the same initial speed v0 and there is no air. ...

A 10-kg rock and a 20-kg rock are thrown upward with the same initial speed v0 and there is no air. ...

A 10-kg rock and a 20-kg rock are thrown upward with the same initial speed v0 and there is no air. If the 10-kg rock reaches a maximum height h, what maximum height will the 20-kg ball reach?
A) h/4
B) h/2
C) h
D) 2h
E) 4h

Pd96   146   2 Replies

Pd96

A ball is thrown downward in the absence of air. After it has been released, which statement(s) ...

A ball is thrown downward in the absence of air. After it has been released, which statement(s) ...

A ball is thrown downward in the absence of air. After it has been released, which statement(s) concerning its acceleration is correct? (There could be more than one correct choice.)
A) Its acceleration is constantly increasing.
B) Its acce

Pd96   62   2 Replies

Pd96

A rock from a volcanic eruption is launched straight up. Which one of the following statements about ...

A rock from a volcanic eruption is launched straight up. Which one of the following statements about ...

A rock from a volcanic eruption is launched straight up. Which one of the following statements about this rock while it is in the air is correct if you neglect the presence of air?
A) On the way up, its acceleration is downward and its velocity

Pd96   95   2 Replies

Pd96

When a ball is thrown straight up with no air resistance, the acceleration at its highest point

When a ball is thrown straight up with no air resistance, the acceleration at its highest point

When a ball is thrown straight up with no air resistance, the acceleration at its highest point
A) is upward
B) is downward
C) is zero
D) reverses from upward to downward
E) reverses from downward to upward

Pd96   132   2 Replies

Pd96

Suppose that a car traveling to the west (-x direction) begins to slow down as it approaches a ...

Suppose that a car traveling to the west (-x direction) begins to slow down as it approaches a ...

Suppose that a car traveling to the west (-x direction) begins to slow down as it approaches a traffic light. Which statement concerning its acceleration must be correct?
A) Its acceleration is positive.
B) Its acceleration is negative.

Pd96   88   2 Replies

Pd96

An auto manufacturer advertises that their car can go "from zero to sixty in eight ...

An auto manufacturer advertises that their car can go "from zero to sixty in eight ...

An auto manufacturer advertises that their car can go "from zero to sixty in eight seconds." This is a description of what characteristic of the car's motion?
A) average speed
B) instantaneous speed
C) average accelerati

Pd96   77   2 Replies

Pd96

Suppose that a car traveling to the west begins to slow down as it approaches a traffic light. ...

Suppose that a car traveling to the west begins to slow down as it approaches a traffic light. ...

Suppose that a car traveling to the west begins to slow down as it approaches a traffic light.  Which of the following statements about its acceleration is correct?
A) The acceleration is toward the east.
B) Since the car is slowing do

Pd96   158   2 Replies

Pd96

If the acceleration of an object is zero, then that object cannot be moving.

If the acceleration of an object is zero, then that object cannot be moving.

If the acceleration of an object is zero, then that object cannot be moving.
A) True
B) False

Pd96   149   2 Replies

Pd96

Which of the following situations is impossible?

Which of the following situations is impossible?

Which of the following situations is impossible?
A) An object has velocity directed east and acceleration directed west.
B) An object has velocity directed east and acceleration directed east.
C) An object has zero velocity but non-zer

Pd96   82   2 Replies

Pd96

If the velocity of an object is zero at some point, then its acceleration must also be zero at that ...

If the velocity of an object is zero at some point, then its acceleration must also be zero at that ...

If the velocity of an object is zero at some point, then its acceleration must also be zero at that point.
A) True
B) False

Pd96   93   2 Replies

Pd96

You drive 6.0 km at 50 km/h and then another 6.0 km at 90 km/h. Your average speed over the 12 km ...

You drive 6.0 km at 50 km/h and then another 6.0 km at 90 km/h. Your average speed over the 12 km ...

You drive 6.0 km at 50 km/h and then another 6.0 km at 90 km/h. Your average speed over the 12 km drive will be
A) greater than 70 km/h.
B) equal to 70 km/h.
C) less than 70 km/h.
D) exactly 38 km/h.
E) It cannot be determine

Pd96   128   2 Replies

Pd96

When is the average velocity of an object equal to the instantaneous velocity?

When is the average velocity of an object equal to the instantaneous velocity?

When is the average velocity of an object equal to the instantaneous velocity?
A) only when the velocity is increasing at a constant rate
B) only when the velocity is decreasing at a constant rate
C) when the velocity is constant

Pd96   123   2 Replies

Pd96

Estimate the number of times an average person's heart beats in a lifetime. Assume the average ...

Estimate the number of times an average person's heart beats in a lifetime. Assume the average ...

Estimate the number of times an average person's heart beats in a lifetime. Assume the average heart rate is 69 beats/min and a life span of 75 years.
A) 3 × 109 beats
B) 3 × 108 beats
C) 3 × 1010 beats
D) 3 × 107 beats

Pd96   169   2 Replies

Pd96

The volume of a 10-mL test tube is equivalent to which one of the following quantities?

The volume of a 10-mL test tube is equivalent to which one of the following quantities?

The volume of a 10-mL test tube is equivalent to which one of the following quantities?
A) 0.01 L
B) 0.001 kL
C) 0.1 L
D) 1 × 10-6 L
E) 0.001 ML

Pd96   285   2 Replies

Pd96

Which one of the following numbers is equivalent to the number 0.0001776?

Which one of the following numbers is equivalent to the number 0.0001776?

Which one of the following numbers is equivalent to the number 0.0001776?
A) 1.776 × 10-4
B) 17.76 × 10-3
C) 1776 × 10-5
D) 177.6 × 10-7

Pd96   113   2 Replies

Pd96

Which of the following numbers is the smallest?

Which of the following numbers is the smallest?

Which of the following numbers is the smallest?
A) 15 × 10-3
B) 0.15 × 100
C) 0.00015 × 103
D) 0.00000015 × 106

Pd96   70   2 Replies

Pd96

Using a digital balance the mass of a certain piece of wood is read as 12.946 g. Thinking in terms ...

Using a digital balance the mass of a certain piece of wood is read as 12.946 g. Thinking in terms ...

Using a digital balance the mass of a certain piece of wood is read as 12.946 g. Thinking in terms of accuracy and significant figures, what value would you record on your data sheet if the balance is accurate to one-tenth of a gram?
A) 12.9 g

Pd96   127   2 Replies

Pd96

A rectangular garden measures 15 m long and 13.70 m wide. What is the length of a diagonal from one ...

A rectangular garden measures 15 m long and 13.70 m wide. What is the length of a diagonal from one ...

A rectangular garden measures 15 m long and 13.70 m wide. What is the length of a diagonal from one corner of the garden to the other?
A) 18 m
B) 19 m
C) 20 m
D) 4.1 × 102 m

Pd96   654   2 Replies

Pd96

The length and width of a rectangle are 1.125 m and 0.606 m, respectively. Multiplying, your ...

The length and width of a rectangle are 1.125 m and 0.606 m, respectively. Multiplying, your ...

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 of the rectangle should be written as

Pd96   260   2 Replies

Pd96

A reasonable estimate for the duration of a typical physics lecture is

A reasonable estimate for the duration of a typical physics lecture is

A reasonable estimate for the duration of a typical physics lecture is
A) 600 s.
B) 1000 s.
C) 3500 s.
D) 10,000 s.

Pd96   213   2 Replies

Pd96

A reasonable estimate for the height of the walls in an ordinary American home is

A reasonable estimate for the height of the walls in an ordinary American home is

A reasonable estimate for the height of the walls in an ordinary American home is
A) 10 m.
B) 8 m.
C) 2.5 m.
D) 1.5 m.

Pd96   322   2 Replies

Pd96

A reasonable estimate for the mass of a typical new-born baby is

A reasonable estimate for the mass of a typical new-born baby is

A reasonable estimate for the mass of a typical new-born baby is
A) 1 kg.
B) 3 kg.
C) 10 kg.
D) 20 kg.

Pd96   264   2 Replies

Pd96

A reasonable estimate for the height of an ordinary adult male is

A reasonable estimate for the height of an ordinary adult male is

A reasonable estimate for the height of an ordinary adult male is
A) 50 cm.
B) 70 cm.
C) 200 cm.
D) 300 cm.

Pd96   213   2 Replies

Pd96

An electron and a positron, both essentially at rest, annihilate each other, emitting two identical ...

An electron and a positron, both essentially at rest, annihilate each other, emitting two identical ...

An electron and a positron, both essentially at rest, annihilate each other, emitting two identical photons in the process. What is the wavelength of these photons? The mass of an electron or positron is 9.11 × 10-31 kg.  (h = 6.626 × 10-34 J ∙

Chery   908   2 Replies

Chery

How does the range of an exchange force depend on the mass of the exchange particle?

How does the range of an exchange force depend on the mass of the exchange particle?

How does the range of an exchange force depend on the mass of the exchange particle?
A) The range is longer for a massive exchange particle than for a light exchange particle.
B) The range is shorter for a massive exchange particle than for

Chery   120   2 Replies

Chery

How many quarks are in a deuteron, H?

How many quarks are in a deuteron, H?

[html]How many quarks are in a deuteron,

Chery   171   2 Replies

Chery

What are the possible charges of a quark (not an antiquark)?

What are the possible charges of a quark (not an antiquark)?

What are the possible charges of a quark (not an antiquark)?
A) -e, 0, e
B) -2/3 e, -1/3 e, +1/3 e, +2/3 e
C) -2/3 e, +1/3 e
D) -1/3 e, +2/3 e
E) -1/3 e, +1/3 e

Chery   133   2 Replies

Chery

Which of the following particles (or groups of particles) are made up of quarks?

Which of the following particles (or groups of particles) are made up of quarks?

Which of the following particles (or groups of particles) are made up of quarks?
A) protons, neutrons, and electrons
B) electrons and neutrinos
C) photons
D) protons and neutrons
E) All particles except for photons are made u

Chery   134   2 Replies

Chery

Which of the following particles are not made up of quarks? (There could be more than one correct ...

Which of the following particles are not made up of quarks? (There could be more than one correct ...

Which of the following particles are not made up of quarks? (There could be more than one correct choice.)
A) alpha particle
B) electron
C) proton
D) positron
E) neutron

Chery   118   2 Replies

Chery