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Physics
Physics
College
Which phenomenon related to light allows scientists to measure the distance between a star and Earth? A. Dark patches appear in the electromagnetic spectrum emitted by stars. B. Light waves spread out as they move farther from their source. C. Stars have different colors based on their temperature. D. Stars have unique elements that make up their atmospheres.
Physics
College
which is an example of a vector quantityA.time B.speed C. acceleration D. distance
Physics
High School
A train travelled 500 meters in 25 seconds
Physics
College
Explain How can youuse a distance-time graphto calculate averagespeed?
Physics
High School
A student lefts a bouncy ball to 1.2m, then releases the ball. The ball bounces back up to 0.86m. Construct an explanation as to what happened to the energy.
Physics
College
Suppose you performed the experiment in atmosphere of Argon at 25 deg. C, (viscosity of argon is 2.26X10^-5 N.s/m^2 at that temperature), and measured terminal speed of 2.64X10^-5 m/s and weight-neutralizing voltage of 35.0 V. How many electrons have been attached to, or detached from the initially neutral plastic sphere
Physics
High School
33A microwave oven changes electrical energy to(1 Point)energyradiantthermal
Physics
High School
propose a way of solving this error in physics
Physics
High School
A bus travels 210 km south along a straightpath with an average velocity of 85 km/h tothe south. The bus stops for 25 min, then ittravels 230 km south with an average velocityof 73 km/h to the south.How long does the total trip last?Answer in units of h.
Physics
College
A trumpet player on a moving railroad flatcar moves toward a second trumpet player standing alongside the track both play a 490 Hz note. The sound waves heard by a stationary observer between the two players have a beat frequency of 2.0 beats/s. What is the flatcar's speed? Take the speed of sound to be 343 m/s.
Physics
College
if AN OBJECT HAS ZERO NET FORCE ON IT THEN THE OBJECT MUST BE AT REST true or false
Physics
High School
Which of the following is an example of mechanical energy?The light from the sun.The energy in a ball as it is falling.The heat from a fire.The light from a light bulb.
Physics
High School
define the focus of a concave lens
Physics
High School
Frozen dirt can be harder than concrete. Explain why this is true.
Physics
High School
compare the advantages and disadvantages of converting our system of measurement in the united states from the English system to the international system of units
Physics
High School
A boy standing on the bridge kicks a stone into the water below. He kicks the stone with a horizontal velocity of 6.59 m/s. It lands in the water 10.92 m away from the bridge. How high is the bridge?
Physics
College
A simple model of a hydrogen atom is a positive point charge +e (representing the proton) at the center of a ring of radius a with negative charge e distributed uniformly around the ring (representing the electron in orbit around the proton). Find the magnitude of the total electric field due to this charge distribution at a point a distance a from the proton and perpendicular to the plane of the ring.
Physics
High School
A car enters a freeway with a speed of 6.5 m/s and accelerates to a speed of 24 m/s in 3.5 min. How far does the car travel while it is accelerating? (Hint: find the acceleration first) a 3205.5 m b 1548.75 m c 76.13 m d 761.3 m
Physics
High School
Position vs Time201510B5Cposition (m)0D-5-10-15E200 1 2 3891011124 5 6 7time (sec)401320
Physics
College
does potential thermal energy affect the temperature of an object?
Physics
College
sort the properties of metalloids into the correct categories
Physics
High School
A ball is thrown upward. The total time the ball remains in the air is 14 s. a) With what speed was the ball thrown upward? b) What is the maximum height reached by the ball?
Physics
High School
Can a platform be in equilibrium if the two upward forces are equal to each other?
Physics
College
Which law applies to the picture?Newtons 1st Law of MotionNewtons 2nd Law of MotionNewtons 3rd Law of Motion
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