1,302 Answered Questions for the topic physical science

Physical Science

09/12/23

Unit 1 Question
Please describe the following two processes: nuclear fission, and nuclear fusion. Briefly describe both processes in your own words, write one example reaction for each of the processes,... more
Follows • 2
Expert Answers •2
Physical Science

09/10/23

A rectangular container measuring 16 Cm X 35 cm X 56 cm is filled with water. What is the mass of this volume of water in kilograms and grams

Follows • 1
Expert Answers •1
Physical Science

09/10/23

Average velocity for both a & b and steps involved
A race car travels northward on a straight, level track at a constant speed travels 0.756 km in 23.0 s. The return trip over the same track is made in 28.0 s. (a) What is the average velocity of... more
Follows • 1
Expert Answers •1
Physical Science

09/08/23

Chapter 11 Question
a) Magnesium forms the compounds Mg(NO3)2, MgCl2, MgCO3, and Mg3(PO4)2. Write the formulas for barium nitrate, barium chloride, barium carbonate, and barium nitrate. Explain why the formulas look... more
Follows • 2
Expert Answers •1
Physical Science

09/08/23

Chapter 11 Question
Classify each of the following as an element, compound, homogeneous mixture, or heterogeneous mixture. Explain. A) sulfur; B) hydrogen peroxide; C) vodka; D) propane; E) air; F) brass; G) blood; H)... more
Follows • 1
Expert Answers •1
Physical Science

09/05/23

Chapter 10 Question
Actinium-225 undergoes alpha decay.a). Write the corresponding nuclear equation.b). The daughter formed in part (a) undergoes in its turn beta decay. Write the equation.
Follows • 1
Expert Answers •1
Physical Science

09/05/23

Chapter 10 Question
 Please describe the fusion reaction that is going on in the core of the Sun, and that allows the Sun to emit such enormous amount of energy? What are the starting elements? What are the product... more
Follows • 1
Expert Answers •1
Physical Science

09/05/23

Chapter 9 Question
a). Explain the difference between a proton and a photon.b). Please describe the first experiment where a beam of electrons was shown to have a wave-like properties?
Follows • 1
Expert Answers •1
Physical Science

09/05/23

Chapter 9 Question
Consider the light that appears orange to our eyes and has a frequency of about 5.00x1014 Hz (i.e. a wavelength of about 600 nm). What is the energy in Joules of the photons associated with this... more
Follows • 1
Expert Answers •1
Physical Science

08/28/23

Question 2 Please Help not sure how to find the solution
A power company transmits current through a 210000V transmission line. This voltage is stepped down at an area substation to 35000V by a transformer that has 500 turns on the primary coil. How many... more
Follows • 1
Expert Answers •1
Physical Science

08/25/23

Chapter 8 Question Help
A power company transmits current through a 210000V transmission line. This voltage is stepped down at an area substation to 35000V by a transformer that has 500 turns on the primary coil. How many... more
Follows • 1
Expert Answers •1
Physical Science

08/25/23

Chapter 8 Question

Consider an electric juicer which draws a current of 8.0 A operating at 220 V. Calculate how much electrical energy does the juicer use each second? 
Follows • 1
Expert Answers •1
Physical Science

08/25/23

Chapter 6 Question Help

Picnickers see a lightning flash and hear the resulting thunder 9.0 s later. If the storm is traveling at a rate of 15 mi/h, then how long in minutes do the picnickers have to gather their things,... more
Follows • 2
Expert Answers •1
Physical Science

08/25/23

Chapter 6 Help Please
a). Consider the wave with a speed of 4.0 x 103­ m/s and frequency of 3.2 MHz (please note: prefix M stands for Mega, which is 106). Calculate the wavelength of this wave. Show your... more
Follows • 1
Expert Answers •1
Physical Science

08/18/23

CH 4 Question 2

Question 2:  On a particular day the following appliances are used for the time indicated: 1600W coffee maker, 10 min, and 1100W microwave oven, 4 min. With these power requirements, find how much... more
Follows • 1
Expert Answers •1
Physical Science

08/18/23

CH 4 Question 1

Question 1:  A 2-kg ball is fired from a cannon. What is the ball’s change in kinetic energy when it accelerates from 5 m/s to 10 m/s? Show your calculations and give the final answer (change in... more
Follows • 1
Expert Answers •1
Physical Science

08/18/23

Question 3 Help Please
A ball has a diameter of 7.0 cm, and a mass of 400 g. Will it float or sink when thrown into a lake? Please explain. (Just in case, the volume of a sphere is (4/3)PixR3)
Follows • 1
Expert Answers •1
Physical Science

08/17/23

Chapter 3 Question2

Question 2:  When unable to loosen the lug nut on an automobile tire a mechanic may put a piece of pipe on the handle of the tire so as to extend its length. Please explain from Physics point of... more
Follows • 1
Expert Answers •1
Physical Science

08/17/23

Chapter 3 - Help Please
A 10-lb rock and a 5-lb rock are dropped simultaneously from the same height. Some say that because 10-lb rock has 2 times much force acting on it as the 5-lb rock, it should hit the ground... more
Follows • 1
Expert Answers •1
Physical Science

08/17/23

Physical Science CH2
a). A student jogs around a circular track with a diameter of 1.0 km in 30 minutes. Find the runner’s average speed in meters per second (m/s).  b). Now convert this speed into kilometers per hr,... more
Follows • 1
Expert Answers •1
Physical Science

08/17/23

Physical Science Chapter 2

A sprinter starting from rest on a straight lever track is able to achieve a speed of 25 m/s in 14 s. What is the sprinter’s average acceleration (please accompany your answer with the proper... more
Follows • 1
Expert Answers •1
Physical Science

08/17/23

Physical Science Chapter 2

A) A student jogs around a circular track with a diameter of 1.0 km in 30 minutes. Find the runner’s average speed in meters per second (m/s). B) Now convert this speed into kilometers per hr,... more
Follows • 1
Expert Answers •1
Physical Science

08/16/23

Chapter 2 Physical Science
Ch 2 Discussion11 unread reply.11 reply.Answer the questions below, after reading Chapter 2 "Motion". Make sure that you give your answer in a clear and justified manner, providing necessary... more
Follows • 2
Expert Answers •1
Physical Science Physics Medical Coding

08/03/23

digital systems physics
Draw a block diagram of a domestic central heating system which has the following elements: A thermostat which has a dial which is set to the required temperature and has an input of the actual... more
Follows • 0
Expert Answers •1
Physical Science Astronomy

06/22/23

How can I remember where the moon is located when it is a new moon or a full moon?
The moon ORBITS (revolves) the earth as the earth revolves around the sun. The positions of these 3 celestial bodies cause the various phases of the moon. When the moon is located between the... more
Follows • 2
Expert Answers •1

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.