A 600-N box is pushed up a ramp that is 2 meters high and 5 meters long. The person exerts a force of 300-N. What is the efficiency of the ramp?
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Related Questions
Which particle would produce a magnetic field?(1) a neutral particle moving in a straight line (2) a neutral particle moving in a circle (3) a stationary charged particle (4) a moving charged particle
20 miles per hour north is an example of ______A) acceleration B) velocity C) deceleration D) speed
If a force ? f = 5.0 y n acts on the particle at this instant, what is the torque about the origin?
An object-spring system undergoes simple harmonic motion. if the mass of the object is doubled, what will happen to the period of the motion?
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F=R/2
F=10/2=5
F=-5(CONCAVE MIRROR)
U=-8(CONCAVE MIRROR)
HEIGHT OF OBJECT=1.5
V=?
HEIGHT OF IMAGE=?
I/F=1/U+1/V
-I/5=-1/8-1/V
-1/V=-1/5+1/8
-1/V=-8+5/40
-1/V=-3/40
1/V=3/40
V=40/3
HEIGHT OF IMAGE/HEIGHT OF OBJECT =-V/U
HEIGHT OF IMAGE=40/3*1/-8*15/10
=-20/8
=-2.5
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Answer:
it will change to become a positively charged ion called a cation.
Explanation:
Ions are formed when an atom gains or loses electrons from its valence shell. This process causes an imbalance between the number of positively charged protons and negatively charged electrons, so the overall ion will carry a net positive or negative charge (I got this explanation from google)
Answer: its does not have any charge but it still might have nuetrons.
Explanation:
Write the vector velocity of the
passenger relative to the water.
Express your answer using two significant figures. Express
your answer in terms of the
unit vectors i
and j.
Answers
The two speeds could be expressed as vectors. The speed of the boat is merely
transmission electron microscope
b.
scanning electron microscope
c.
compound light microscope
d.
dissecting microscope
Answers
Answer;
-Compound light microscope
Explanation;
-A compound microscope is a microscope that uses multiple lenses to enlarge the image of a sample. It is commonly used for viewing samples at high magnification (40 - 1000x), which is achieved by the combined effect of two sets of lenses: the ocular lens and the objective lenses.
-Compound microscopes usually include exchangeable objective lenses with different magnifications (e.g 4x, 10x, 40x and 60x), mounted on a turret, to adjust the magnification. These microscopes also include a condenser lens and iris diaphragm, which are important for regulating how light hits the sample.
A. Commutator
B. Loop of wire
C. Permanent magnets
D. Battery
PLS HELP
Answers
Commutator is part of a motor causes its electromagnet to turn in the same direction consistently, transforming electrical energy into mechanical energy.
What is energy?
Energy is the ability or capability to do tasks, such as the ability to move an item (of a certain mass) by exerting force. Energy can exist in many different forms, including electrical, mechanical, chemical, thermal, or nuclear, and it can change its form.
A commutator is a rotary electrical switch in certain types of electric motors and electrical generators.
Commutator is part of a motor causes its electromagnet to turn in the same direction consistently, transforming electrical energy into mechanical energy.
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Answer:
A. Commutator
Explanation:
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Here are the following choices:
A) at either A or B.
B) midway between A and B.
C) 1/3 of the distance from A to B.
D) 1/4 of the distance from A to B.
E) 1/ times the distance from A to B.
Final answer:
The kinetic energy of a mass oscillating on a vertical spring is at a minimum when the object is at the extreme points of its motion. This is because the object has momentarily stopped moving, leading to zero kinetic energy. All the energy is instead stored as potential energy in the spring.
Explanation:
In the case of a mass oscillating on a vertical spring, the kinetic energy of the object is at a minimum when the object is at its extreme points, i.e., when it is at points 'a' or 'b'. This is because, at these positions, the object momentarily comes to rest before reversing its direction, thereby having a velocity (and hence kinetic energy), which is proportional to the square of the velocity, of zero. The energy at these points is mainly stored in the spring as potential energy.
At these extreme points, we have a situation where the potential energy (U) is maximum and the kinetic energy (K) is equal to zero. At the midpoint position x = 0, the entire energy is kinetic while the potential energy in the spring is zero, which suggests that the kinetic energy is minimum at the extreme positions.
This property of kinetic and potential energy fluctuating between each other is a common characteristic of simple harmonic motion.
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