Hot Student Stories

Physics

List possible limitations to scientific models

William Cain

follow
followin
1 answer
2 views

Discuss the factors that are used to determine power.

Megan Page

follow
followin
1 answer
2 views

Which therapy is associated with light, but not sound? a breaking down kidney stones b acoustically targeting the delivery of a drug c cauterizing an incision or wound d ablating tumors

Heather Maxwell

follow
followin
1 answer
3 views

What happens when the temperature of an object increases? A. The particles move closer together. B. The particles move faster. C. The number of particles increases. D. The particles stop moving.

Victoria Fowler

follow
followin
1 answer
2 views

Cathode rays were shown to be a stream of _____.

Kristi Hammond

follow
followin
1 answer
2 views

What does an oceanic -oceanic convergence give rise to

Kristi Hammond

follow
followin
1 answer
2 views

In which of these samples do the molecules most likely have the most kinetic energy? solid ice at −5°C ice water at 0°C liquid water at 98°C water vapor at 150°C

Brandon Scott

follow
followin
1 answer
2 views

Two stars that are bound together by gravity and orbit a common center of mass are known as

Carlton Burgess

follow
followin
1 answer
2 views

Which force best represents Fg? a. A weight lifter is pushing a barbell upward with a force of 90 N. b. The weight of a barbell acting on a weight lifter is 80 N. c. The amount of upward force of a table on a box is 25 N. d. A box on a rough table has difficulty sliding past 25 N of force.

Heather Maxwell

follow
followin
1 answer
9 views

Most of uranus's atmosphere is composed of a. helium and hydrogen. b. oxygen and nitrogen. c. carbon dioxide and methane. d. nitrogen and hydrogen.

Daniel King

follow
followin
1 answer
2 views

A force of 11n is applied to the handle of a screw driver being used to pry off the lid of a paint can. what is the efficency of the screw driver.

Bethany Evans

follow
followin
1 answer
12 views

Which of the following is the best example of potential energy? Question 1 options: a ball sitting at the top of a hill a ball sitting at the bottom of a hill a ball rolling down a hill Save Question 2 (1 point) Question 2 Unsaved Which of the following is an example of kinetic energy? Question 2 options: a girl running in a race a car sitting motionless a tank containing gasoline a sled sitting at the top of a hill Save Question 3 (1 point) Question 3 Unsaved The water held by a dam is an example of which type of energy? Question 3 options: kinetic energy chemical energy electrical energy potential energy Save Question 4 (1 point) Question 4 Unsaved What does the kinetic theory explain? Question 4 options: Heat is due to Pascal´s principle. Heat is due to temperature. Heat is due to potential energy. Heat is due to the motion of molecules. Save Question 5 (1 point) Question 5 Unsaved If the atoms and molecules of a substance are moving very fast, the substance is __________. Question 5 options: porous cold hot frozen Save Question 6 (1 point) Question 6 Unsaved Heat energy is measured indirectly by __________. Question 6 options: temperature kinetics recording the motion of molecules Save Question 7 (1 point) Question 7 Unsaved What are the ways that heat moves? Question 7 options: Heat only moves through air currents. Heat moves through conduction, convection, and radiation. Heat only moves through conduction and radiation. Heat moves from a cold object to a warm object. Save Question 8 (1 point) Question 8 Unsaved Convection requires __________ to transfer heat. Question 8 options: the vacuum of space fluids (liquids or gases) insulation solids Save Question 9 (1 point) Question 9 Unsaved What does an insulator do? Question 9 options: An insulator slows heat transfer. An insulator cools a substance. An insulator warms a substance. An insulator emits electromagnetic radiation. Save

Theresa Perry

follow
followin
1 answer
0 views

A glob of sticky putty is thrown against a slightly open door so that it sticks on impact and gives the door a momentum of 1.4 kg m/s. A rubber ball with exactly the same mass and velocity as the sticky putty strikes the door and bounces back at its initial speed in the opposite direction. What impulse does it impart to the door? 2.8 kgm/s 1.4 kgm/s 0.70 kgm/s 0 kgm/s

Jeffrey Rodriguez

follow
followin
1 answer
2 views

When you apply the ipde process, you may decide to?

Victoria Fowler

follow
followin
1 answer
4 views

List three important characteristics of Earth.

Kristi Hammond

follow
followin
1 answer
3 views

What causes a bolt of lightning? A. Electrical charges build up in the clouds only. B. Electrical charges build up on the ground only. C. Electrical charges build up in the clouds and on the ground. D. Electrical charges build up in the space between the clouds and the ground.

Curtis Rhodes

follow
followin
1 answer
2 views

Water at the top of a slope has potential energy. please select the best answer from the choices provided: t f

Curtis Rhodes

follow
followin
1 answer
2 views

Why must you operate the exhaust blower before starting a boat's inboard gasoline engine?

Whitney Matthews

follow
followin
1 answer
2 views

Which of the following best describes a plane? a. The surface of a flat table B. The edge of a desk C. A curve in a road D. The point of intersection of two walls

Ronald Miller

follow
followin
1 answer
2 views

Which of the following is true about glass recycling? a. Recycling glass reduces the rate of deforestation. b. Recycling glass eliminates greenhouse gas emissions. c. Recycling glass is an energy-saving practice. d. Recycling glass has an incredibly short turn around time.

Jeffrey Rodriguez

follow
followin
1 answer
26 views

When a pot of water is put on a stove, the water at the top gets hot primarily by ____. a. radiation c. convection b. conduction d. condensation Certain materials can become superconductors under what conditions? a. When it is very hot c. Under very high pressure b. When it is very cold d. Under very low pressure

Zach Chandler

follow
followin
1 answer
2 views

Which statement best describes how waves carry energy? A.Energy moves from one place to another through the wave. B.Energy increases as it moves through the wave. C.Energy is completely consumed by the beginning of the wave. D.Energy builds through the wave and is released at the end.

Samantha Barber

follow
followin
1 answer
12 views

One way to get consistent, valid data is to: be sure that instruments are calibrated properly. use simple instruments to make measurements. select the best data to place into data tables. make the measurements as quickly as possible

Bethany Evans

follow
followin
1 answer
2 views

When one vehicle is towing another by means of a chain the chain must?

Carlton Burgess

follow
followin
1 answer
2 views

Explain how wildfires help restore soil nutrients to forest ecosystems.

Jeremy Wood

follow
followin
1 answer
2 views

According to newton's second law of motion, force is equal to mass times acceleration. true or false.

Alexa Spicer

follow
followin
1 answer
3 views

What is the angular frequency ω? assume this is the first rotation.?

Kaitlin Dean

follow
followin
1 answer
4 views

How does an insulator stop the flow of an electric current? A. Insulators have a positive charge, so they absorb electrons. B. Insulators do not allow electrons to move easily through them. C. Insulators convert electric energy to other forms of energy. D. Insulators have too many electrons.

Jodi Brooks

follow
followin
1 answer
2 views

Which transformation of energy occurs in a hydroelectric power plant? A. Potential to chemical energy B. Chemical to potential energy C. Chemical energy to kinetic energy D. Kinetic to electrical E. Electrical to potential energy

Nicholas Rivera

follow
followin
1 answer
2 views

Which of the following is a chemical equation that accurately represents what happens when sulfur and oxygen are produced from sulfur trioxide? A. 2S + 3O2 --> 2SO3 B. 2SO3 --> 2S + 3O2 C. S + O2 --> SO3 D. SO3 --> S + O2

Heather Maxwell

follow
followin
1 answer
2 views

Which coin paradox calls for the ability to assess when more force is needed and when it might be?

Jennifer Patterson

follow
followin
1 answer
3 views

A person runs at a speed of 4 meters per second. How far will the person travel in 40 seconds?

Kevin Sutter

follow
followin
1 answer
2 views

Five equal-mass particles (a–e enter a region of uniform magnetic field directed into the page. they follow the trajectories illustrated in (figure 1 . part a which particle (if any is neutral?

Mindee Nelson

follow
followin
1 answer
45 views

Study Figure 10-3. How much nitrogen-14 will be produced from a 200-g sample of carbon-14 after 17,190 years?Download png

Craig Stewart

follow
followin
1 answer
3 views

A mirror with a reflecting surface that caves inward is said to be

Caroline Campbell

follow
followin
1 answer
2 views

Which statement best describes the properties of sodium chloride? A. high melting point B. poor conductor of electric current when melted C. tendency to not shatter when struck D. all of the above

Brandon Scott

follow
followin
1 answer
3 views

The available source of charge that pushes a charge through a circuit is A. resistance. B. voltage. C. alternating current. D. direct current.

Kristi Hammond

follow
followin
1 answer
2 views

Which one of the following is not an example of a combination reaction a. 2H2O(I)---> 2H2(g)+O2(g) b. 2K+CI2--->2KCI c. 2H2+O2--->2H2O d. 2Mg+O2--->2MgO

Jennifer Patterson

follow
followin
1 answer
2 views

Energy from the sun is transferred to earth through convection. true or false.

Karen Wright

follow
followin
1 answer
2 views

What technology helped propagate consumerism and uniformity of American life in the 1950s?. .A. AM radio. . B.computers. . C.television. . D.the transistor. .

Jodi Brooks

follow
followin
1 answer
2 views

A conglomerate is a rock that forms as a result of _____. . . Choices:Intense heat and pressure. Compaction and cementation. Rapid cooling. Slow cooling.

Brandon Scott

follow
followin
1 answer
2 views

What compound name belongs in box (1) in Figure 3? What type of bond belongs in box (3) in Figure 3? Download png

Eric Morgan

follow
followin
1 answer
2 views

Rainforest deforestation generally has a positive impact on indigenous tribes and peoples. Please select the best answer from the choices provided T F

Timothy Norman

follow
followin
1 answer
2 views

Find τf, the torque about point p due to the force applied by the achilles' tendon.

Deborah Edwards

follow
followin
1 answer
2 views

A wave will go faster through a liquid at ____________ temperatures

Ronald Miller

follow
followin
1 answer
2 views

According to MyPlate, you should eat approximately two and a half cups of vegetables per day. Please select the best answer from the choices provided. T F

Megan Page

follow
followin
1 answer
2 views

In a typical rear-end collision, the victim's ________ is/are accelerated faster and harder than the torso

Ashley Howard

follow
followin
1 answer
2 views

Energy from the sun reaches Earth mostly by ________. A.) conduction B.) convection C.) radiation D.) thermal expansion

Kevin Sutter

follow
followin
1 answer
3 views