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Physics
Physics
High School
An 81 kg football player moving 6. 5 m/s tackles and collides with a stationary 140 kg football player. What speed will the football players have the moment after impact?
Physics
High School
a bored student holds one end of a flexible ruler and sends it into simple harmonic motion. the free end of the ruler moves a total distance of 10.0 cm and makes 25 complete oscillations in 10 seconds. what is the maximum speed? (give the answer in cm/s to one decimal point)
Physics
High School
if a red giant appears the same brightness as a red main sequence star, which one is further away
Physics
High School
a 1000kg car moving at 23.9 m/s on a flat road slams on the brakes and skids to a stop. the coefficient of kinetic friction between the road and car tires is 0.739. how many meters does the car go before it comes to a complete stop? (hint: think of work-energy theorem, and friction equation)
Physics
High School
A substance is boiled repeatedly and stirred, but the solute never mixes with the solvent. Which best describes why?
Physics
High School
a solid hemisphere with mass equal to 10 kilograms and radius of 30 millimeters sits with its flat side against a horizontal surface. what pressure (in pascals) does it exert on the surface?
Physics
High School
what is the charge q on the capacitor immediately after the switch is closed? express your answer to two significant figures and include the appropriate units.
Physics
High School
a bird is flying with a speed of 18 m/s over water when it accidentally drops a 2 kg fish. assuming the altitude of the bird is 5.4 m, and disregarding friction, what is the speed of the fish when it hits the water? pdf
Physics
College
Two identical capacitors are connected in parallel and each acquires a charge Q0 when connected to a source of voltage V0. The voltage source is disconnected and then a dielectric (K=3.2) is inserted to fill the space between the plates of one of the capacitors. Determine (a) the charge now on each capacitor, and (b) the voltage now across each capacitor.
Physics
High School
Humans have a range of hearing of approximately 20 Hz to 20 kHz. Mice have an auditory system similar to humans, but all of the physical elements are smaller. Given this, would you expect mice to have a higher or lower frequency range than humans? Explain
Physics
High School
how do ice skaters get spinning so rapidly? where do they suddenly get the energy? are they violating conservation of energy?
Physics
High School
Explain the law of conservation of mass. How is energy converted?
Physics
High School
Conclusion: In two complete paragraphs, state whether or not your hypothesis is supported. Make sure to discuss which ball demonstrated the highest energy lost and which was least expected/lower than expected).
Physics
High School
how far apart are the object and image produced by a converging lens with 35.5- cm focal length when the object is 45 cm from the lens?
Physics
High School
. a horizontal force of 200 n is applied to a 55 kg cart across a 10-m level surface. if the cart accelerates at 2.0 m/s2 , then what is the work done by the force of friction as it acts to impede the motion of the cart?
Physics
High School
Calculating Average SpeedIf you know the total distance an object travels over a certain period of time, you cancalculate the average speed of the object.To do so, you use the formula ____________________________________________.
Physics
High School
worries that critics have, in regards to genetically engineered crops in Africa are as follows:a. The significant impact the genetically engineered crops could have on trade in the region.b. Dependency on foreign private sector businesses for technology needs.c. The concern over how compatible the genetically engineered crops will be with local farming standards.
Physics
High School
Brainly I need help.with this problem.
Physics
College
An electric field is most directly related to:a.the charge carried by a test chargeb.the kinetic energy of a test chargec.the potential energy of a test charged.the momentum of a test chargee.the force acting on a test charge
Physics
High School
how much work, in kj, can a spring whose spring constant is 13 kn/cm produce after it has been compressed 3 cm from its unloaded length?
Physics
High School
a representation of an electric field shows 10 field lines perpendicular to a square plate. how many field lines should pass perpendicularly through the plate to depict a field with twice the magnitude?
Physics
High School
what spring constant must the bungee cord have for the student's lowest point to be 2.0 m above the water?
Physics
High School
consider the conditions in practice problem 5.2. how short would the driver reaction times of oncoming vehicles have to
Physics
High School
how many principle rays can you identify? describe each principle ray in a way that allows someone else, who has not seen the diagram but who has read your verbal description, to sketch each principle ray correctly from your description.
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