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Ultimate Physics Study Guide - Questions & Answers
Physics
High School
Much like scientists study cause and effect, firefighters and fire investigators observe the effects of a fire and try to find out its cause. Read the following example:An office building caught fire early one morning, just as people were coming to work. Something caused the fire, and fire investigators need to collect data todetermine what did it. Place a checkmark next to the data that could be related to the fire in this office building and could help them determine its cause:- A light switch with worn electrical wiring was found on the thirdfloor.- Gasoline was stored in the basement of the building.- The building is in the downtown area of a big city.- It took firefighters 45 minutes to put out the fire.- The fire started on the third floor of the building.- People coming to work turned on the lights in the building.- People smoking in bed can start fires.- Oily rags were kept in an open container on the first floor.
Physics
High School
one person pulls on a rope with a force of 400 n to the right. another person pulls on the opposite end with a force of 600 n to the left. what is the unbalanced net force?
Physics
High School
Part A Under what condition is the angular momentum of an object conserved? O If there are no torques acting on it. O If there is no net torque acting on it. If it is a point particle. If there is no net force acting on it. Submit Request Answer Part B On what does the angular momentum of an object depend? Select all that apply. O The axis of rotation. The shape of the object. O The mass of the object. O The rate at which that the object rotates. Submit Request Answer
Physics
College
A mass of 10kg suspended on a steel rod of length 2m and radius 1mm what is the elongation of the rod beyond it's original length (Take E = 200*10^9 Newton per metre square
Physics
High School
At which temperature does the motion of atoms and molecules stop(A) 0 degrease C (B) 0 C (C) 0 degrease K (D) 0 K
Physics
High School
What is wind ? What type of energy is possessed by wind ? (b) Explain how, wind energy can be used to generate electricity. Illustrate your answer with the help of a labelled diagram. (c) State two advantages of using wind energy for generating electricity. (d) Mention two limitations of wind energy for generating electricity
Physics
High School
when traveling at 55mph, how many feet do you need to stop?approximately 302 feetapproximately 303 feetapproximately 304 feetapproximately 305 feet
Physics
High School
what is the process that solar cells use to produce energy called?
Physics
High School
when approaching a railroad crossing with no warning device, the speed limit is ___
Physics
High School
two similar razor blades were placed on a wooden block and the other on an iron block. it was observed that the razor blade on the wooden block is attracted by the magnet while that on the iron block was not. explain
Physics
High School
how friction oppse motion
Physics
High School
How long will it take 240V, 3000W electric immersion heater to raise the temperature of 150 litres of water in a well-lagged calorimeter made of copper of mass 20kg from 15 to 70C?
Physics
High School
a pollen grain is placed in water state and explain the direction in which it moves
Physics
College
A thin beam of light falls on mirror 1 as shown in the diagram below. four P.Q.Rands are placed in front of mirror 1 and mirror 2. Mirror 2 J|||||| RE Nanda wants to find out on which tikely box in the diagram in the beam to fall after reflecting off mirrov 1 and mirrov 2 List the steps that he should Follow in the correct order.
Physics
High School
1kg of water will occupy minimum space atA) 0CB) 100CC) -4CD) 4C
Physics
High School
Can anyone solve this question PLEASE hurry
Physics
High School
I need to know the answers for 2 and 3
Physics
High School
Hubble investigates the relationship between the red-shift of light and distant galaxies.give the link that Hubble found between observing red-shift and how far away they are from Earth .
Physics
High School
A golf ball rolled off your 1 space m tall desk. If the golf ball took 0.28 space s to hit the ground 1.35 space m from the table, what was the horizontal velocity of the ball as it rolled off the table?
Physics
High School
at what time of the day is the demand of electricity highest?
Physics
High School
The author says this is equivalent to taking a long shower every day for two-and- a half weeks to
Physics
College
The graph shows the decay of two different radioactive nuclei, Source A and Source B.How long does it take Source B to complete two half-lives?a. 10 sb. 5 sc. 40 sd. 20 s
Physics
High School
The frequency of a slinky spring wave is 5 hertz with a wavelength of 0.8 meters. What is its velocity?
Physics
College
Jeremiah is conducting an investigation about the water cycle. He is given the following materials:a lampa glass jar that contains waterplastic wrapDescribe how Jeremiah can arrange these materials to create a model that shows the processes by which water is cycled from a lake into the atmosphere and back to the lake. Be sure to identify what each material represents in the model.
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