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Physics
College
Find the direction of the sumof these two vectors:16.3 m7.70 m20.0magnitude (m)A27.8
Physics
College
Match the graph with the correct description of that graph. A. decreased speed; acceleration B. at Rest, no motion C. decreased speed; deceleration D. increased speed; acceleration
Physics
High School
What is the main feature of an interdisciplinary science?
Physics
College
A boy is sitting on the outside edge of a merry go round. If the angular velocity id doubled, then the linear speed of the boy will be
Physics
College
Find the magnitude of the force F exerted by the leg on the small pulley. (By Newton's third law, the small pulley exerts an equal and opposite force on the leg.) Let the mass m be 2.27 kg.
Physics
High School
In the district soccer championship finals, Elizabeth kicks a 0.56 kg soccer ball with a force of 18.2 N. How much does she accelerate the soccer ball from rest in the process?
Physics
High School
rank the microtidal forces on your own body, from greatest to least, produced by the following: rank from greatest to least. to rank items as equivalent, overlap them. earth sun moon
Physics
High School
it is possible to use a simple machine and gain no mechanical advantage
Physics
College
Earth has a radius R of about 6.37 106 m. How many watts of power does Earth receive from the sun? Remember that even though the Earth is a sphere, its image with respect to the sun is a circle in other words, Earth's shadow is circular, meaning that it captures a circular amount of light. Use the observed value of S = 1361 W/m2.
Physics
College
It is now 10:29 a.m., but when the bell rings at 10:30 a.m. Suzette will be latefor French class for the third time this week. She must get from one side of theschool to the other by hurrying down three different hallways. She runs downthe first hallway, a distance of 35.0 m, at a speed of 3.50 m/s. The secondhallway is filled with students, and she covers its 48.0-m length at an averagespeed of 1.20 m/s. The final hallway is empty, and Suzette sprints its 60.0-mlength at a speed of 5.00 m/s. a) Does Suzette make it to class on time or doesshe get detention for being late again? b) Draw a distance vs. time graph ofthe situation.
Physics
High School
Two identical balls are rolling toward one another, one from the left and the other from the right. The mass of each ball is 1.0 kg and the speed of each ball is 3.0 m/s. After an elastic collision, both balls roll away from one another at the same speed. What is the momentum of each ball before the collision and what is the total momentum of the two-ball system after the collision?
Physics
High School
consider the previous problem involving the velocity addition law. let us pose a more general problem with a series of observers in a line: suppose one observer sees a second observer moving away from them at a speed . the second observer sees a third moving away from her in the same direction at . similarly, the third observer sees a fourth moving away from him, and so on up to some large number n. what is the speed of the n-th observer relative to the first observer?
Physics
High School
where are bone cells made of? select all that apply heart, liver, blood vessels, red bone marrow
Physics
College
A 55 kg motorcyclist is flying through the air at 72 km/h at the apex of the jump 8.3 m above the ground. Find his landing speed assuming energy is conserved.
Physics
College
Given three electrically charged spheres A,B and C. Sphere A is brought near Sphere B and both are attracted to each other electrically. Sphere B is brought near Sphere C and both repel each other electrically. What happens when Sphere A is brought near Sphere C? A)electrical repulsion B)both attraction and repulsion C)electrical attraction D)neither attraction nor repulsion E)nothing
Physics
High School
What is the wavelength in nanometers of light with a frequency of 2. 840 1014 hz?.
Physics
High School
to sharpen a knife, you push with a force of 5n so that the edge of the knife is against a stone. the stone will sharpen the knife if it is spinning. the 30cm diameter stone is spinning at 200rpm and has a mass of 30kg. the coefficient of kinetic friction between the knife and the stone is 0.30. after 10 seconds of grinding what is the angular speed of the stone?
Physics
High School
a 5.0 g coin is placed 15 cm from the center of a turntable. the coin has static and kinetic coefficients of friction with the turntable surface of and the turntable very slowly speeds up to 60 rpm. does the coin slide off
Physics
High School
Help!!Batman is chasing the joker. If, while gliding down towards him at 75 m/s, it takes him 30 seconds to catch him, how far away was the joker? And how many kilometers is that?
Physics
High School
a rowboat is being pulled by two ropes tied to the front of the boat. one rope is along the x-axis direction and exerts a force of 50 n. the other is along the y-axis direction and exerts a force of 100 n. what is the magnitude of the net force that the ropes exert on the boat?
Physics
High School
a slender uniform rod 100.00 cm long is used as a meter stick. two parallel axes that are perpendicular to the rod are considered. the first axis passes through the 50-cm mark and the second axis passes through the 20-cm mark. what is the ratio of the moment of inertia through the second axis to the moment of inertia through the first axis?
Physics
High School
A car travels at 15 m/s for 10,0s. It speedsup with an acceleration of 0.2 M/S for 15.0 s. At theend of this time What is its velocity?
Physics
High School
The acceleration of a moving object is given by the function a=8t+4. the object is initially 2m from the origin and moving to the right with a speed of 4 m/s. find the velocity at t=3s
Physics
High School
A weight training ball is put on a ledge 3 m high. The potential energy of the ball on theledge is 200 J. What is the mass of the ball? Round your answer to the nearest tenth.Rearrange the formula to solve for mass.Use the formula to solve for the mass of the ball.
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