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Physics
College
11 When early humans discovered fire, it likely changed the way they survived in harsh winter climates. What is another change that happened around the same time because of this discovery? A. Their diets moved from nuts and berries to include meat. B. They developed salves or ointments to deal with burns. C. Their language skills progressed to describe things like fire. D. They learned how to preserve food through fermentation.
Physics
College
Questions : 1. What is the penguins average velocity during the chase? 2. What is the penguins average speed during the chase?
Physics
College
2. One of your classmates, in a fit of unrestrained ego, jumps onto a lab table!a) Draw a qualitative force diagram for the table. Use marks on the vectors to show the balance of forces.b) Your classmate's mass is 65 kg and the table weighs 500 N. Calculate the normal force on thetable by the floor. Show your work!c) Find the mass of the table.
Physics
College
Use Polya's four-step problem-solving strategy to solve the following exercise.A frog is at the bottom of a 13-foot well. Each time the frog leaps, it moves up 3 feet. If the frog has not reached the top of the well, then the frog slides back 1 foot before it is ready to make another leap. How many leaps will the frog need to escape the well?______ leaps
Physics
College
How much heat is necessary to change 500 g of ice at - 10C to water at 20C ?
Physics
High School
Frosted glass is made of glass with a scratched surface. Decide whether frosted glass is opaque, translucent,or transparent and explain your reasoning.
Physics
College
Even when the head is held erect, as in the figure below, its center of mass is not directly over the principal point of support (the atlanto-occipital joint). The muscles in the back of the neck musttherefore exert a force to keep it erect. That is why your head falls forward when you fall asleep in class. If the perpendicular distance between the line of action for the weight of the head and thepivot point is rw = 2.4 cm and the perpendicular distance between the line of action for theforce the muscles exert on the head and the pivot point is rMi=5.1 cm. determine each or thefollowina. (Assume the weight of the head is 50 N.)
Physics
High School
art a a long, straight, vertical wire carries a current upward. due east of this wire, in what direction does the magnetic field point?
Physics
College
URGENT!! ILL GIVEBRAINLIEST!!!! AND 100 POINTS!!!!!!
Physics
High School
A 60.0 kg astronaut is on a spacewalk when the tether line to the shuttle breaks. The astronaut is able to throw a spare 10.0 kg oxygen tank in a direction away from the shuttle with a speed of 12.0 m/s, propelling the astronaut back to the shuttle. Assuming that the astronaut starts from rest with respect to the shuttle, find the astronauts final speed toward the shuttle after the tank is thrown.
Physics
High School
name three ways in which forces are created(Cpo Science book, 8th grade)
Physics
College
ulietta and Jackson are playing miniature golf. Julietta's ball rolls into a long, straight upward incline with a speed of 3.24 m/s and accelerates at -0.234 m/s/s for 2.56 seconds until it reaches the top of the incline and then continues along an elevated section. Determine the length of the incline?
Physics
College
One end of a thin rod is attached to a pivot about which it can rotate without friction. Air resistance is absent. The rod has a length of 0.48 m and is uniform. It is hanging vertically straight downward. The end of the rod nearest the floor is given a linear speed V so that the rod begins to rotate upward about the pivot. What must be the value of V such that the rod comes to a momentary halt in a straight up orientation, exactly opposite to its initial orientation?
Physics
College
18.An object with a mass of 3.2 kg has a forceWhat is the resulting acceleration of the object?of 7.3 newtonsapplied to it.
Physics
College
Current is measured through a resistor during a laboratory experiment. 1.833 C of charge is measured to pass through the resistor in 1,538 s. What is the current of the circuit? (6 decimal places)
Physics
College
What is the magnitude of a force that is required to keep a spring with a spring constant 205 N/m compressed 0.4 m from its starting point?
Physics
High School
There are 16 ounces in a pound. Calculate the equivalent of a one ounce force in newtons.
Physics
College
A 45.8 kg block is placed on an inclined plane that is 44.2 degrees from the horizontal. What is the acceleration of the block? Ignore friction.I have to do the following:1. Draw a free body diagram2.Identify Givens and Unknowns3.Identify the Equations4.Set up the equation using the givens and unknowns5.Solve
Physics
College
hi good afternoon pls I need solution to a problem the question goes like this : The horizontal floor of a water reservoir is said to be 1.0m deep when viewed vertically from above .if the refractive index of water is 1.35 calculate the real depth of the reservoir a)2.35mb)1.35mc)1.00md)0.35m
Physics
High School
a communication satellite orbits laurus in a circular trajectory at an altitude of 226 km. find the velocity of this satellite in km/s.
Physics
College
Which of the following best describes refraction of a wave?A. As a wave moves around a corner or through an opening, itsdirection of motion changes.B. As a wave reaches the interface between two different media, itsdirection of motion changes and it remains in the first medium.C. As a wave moves from one medium to another, the energy of thewave is converted to other forms of energy.O D. As a wave moves from one medium into another in which itsspeed is different, the wave changes direction.
Physics
College
Determine the mass of an object when the period of oscillation is 11 s and spring constant is 10 N/m.
Physics
College
A water heater uses a resistor of 16 to boil water. The heater is connected to a 240 V power source. If the heater is used for 2 hours a day, calculate the cost to run the heater for a year (365 days). The electricity cost by TNB is given as 21.8 sen/kWh.
Physics
College
Determine the order of magnitude of the following small number by entering the appropriate exponent n below: 4,8701021kg10nkg .
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