How much work does a person do in pushing a box with a force of 10 N over a distance of 4.0 m in the direction of the force?
Answers
Theta being the angle between the surface and the object.
So, since the direction is the same as that of the force, you can say that theta is equal to zero.
Cos (0) = 1
So, W = (10) * (4) * (1) = 40 Joules
Related Questions
Which statement is true about a polarized object?
Potential energy is the energy
Which is an example of larceny? A. taking a man's wallet while threatening him with a firearm. B. taking $50 from an unattended purse. C. stealing a man's car? D. breaking into a home and stealing $10,000 cash
in a series circuit: 1) the relationship between total resistance and individual resistances is 2) the relationship between total voltage and individual voltages is 3) the relationship between total current and individual currents is
b. step-up transformer
c. step-down transformer
d. motor
e. detector
Answers
The correct answer of the question is : B) Step-up transformer.
EXPLANATION :
Before coming into any conclusion, first we have to understand the step-up and step-down transformer.
The step-up transformer is the transformer whose transformer ratio is greater than one. It means it will increase the voltage of the source or decrease its current.
On the other hand, the transformer ratio of step-down transformer is less than one. Hence, it will decrease the higher voltage to lower voltage or increase the lower current into higher current of the given source.
As per the question, we want to increase the voltage of the source.
Hence, we have to use step-up transformer.
B. 120 N
C. 23 N
D. 1.875 kg
Answers
What force is required to accelerate a body with a mass of 15 kilograms at a rate of 8m/s²
As Force=Mass X Acceleration
Here F= 15 Kg and Accelerate = 8m/sq sec
So force required = 15×8 = 120N
F = 15 kg * 8 m/s²
F = 120 N
Answer B
hope this helps
Answers
Answer:
So option (b) will be correct option
Explanation:
We have given that there is a step up transformer in which number of turns in primary coil is 15
That is,
Primary voltage , and secondary voltage
We have to find the number of turns in the secondary \
We know that for the transformer
So option (b) will be correct option
b. fetch
c. temperature
d. how long the wind blows
Answers
Answer:
Temperature does not determine the height, length and the period of the wave.
Explanation:
Height of the wave shows the amplitude, the length shows the wavelength, and the period of the wave shows the frequency.
The factors that helps to determine the height, length and the period of the wave are :
- Wind speed : The speed is equal to the product of the wavelength and the frequency of the wave.
- Fetch : It is defined as the horizontal distance where the wind blows.
- How long the wind blows : It shows how long the wind blows. It is inversely proportional to the frequency of the wave.
Hence, the correct option is (c) " temperature ".
Final answer:
The temperature, unlike the wind speed, fetch, and duration of wind blow, does not directly help determine the height, length, and period of a wave.
Explanation:
The height, length, and period of a wave are primarily determined by wind speed, the fetch (the distance over which the wind blows across the water surface), and the duration for which the wind blows. Temperature does not directly determine these characteristics of a wave. Therefore, option 'c' is the correct answer.
While temperature can affect the density and viscosity of the medium, and indirectly impact wave speed, it does not directly influence the height, length, and period of a wave in the same way as the other factors.
The factor that does NOT help determine the height, length, and period of a wave is c. temperature. Temperature does not have a direct influence on the characteristics of a wave. The other factors, such as wind speed, fetch, and how long the wind blows, all play a role in determining the properties of a wave.
Learn more about Wave Characteristics here:
#SPJ6
Answers
Answer:
ultraviolet light shining on the minerals will cause them to give off visible light.
Explanation:
Here we know that in all electromagnetic waves have certain range of energy
Here in the above case when a given frequency range of electromagnetic wave incident on the fluorescent mineral then that mineral will absorb few amount of energy and the remaining energy will throw back into the surrounding again.
So here the main concept is that when a electromagnetic wave which is higher in energy then visible light incident on fluorescent material then it will absorb some amount of energy and the remaining energy is released in form of light
So here energy more than visible light is for ultraviolet light only
so here the correct answer would be
ultraviolet light shining on the minerals will cause them to give off visible light.
Answer;
-Ultraviolet light shining on the minerals will cause them to give off visible light.
Explanation;
-Electromagnetic waves or EM waves are waves that are created as a result of vibrations between an electric field and a magnetic field. In other words, they are composed of oscillating magnetic and electric fields.
-Electromagnetic waves are used to transmit long/short/FM wavelength radio waves, and TV/telephone/wireless signals or energies. They are also responsible for transmitting energy in the form of microwaves, infrared radiation (IR), visible light (VIS), ultraviolet light (UV), X-rays, and gamma rays.
Answers
Complete option to the question:
A. The asthenosphere is broken up into large continental- and ocean-sized plates.
B. Convection currents within the asthenosphere push magma upward to create new crust.
C. Heat from deep within Earth is thought to keep the asthenosphere malleable.
D. The asthenosphere is the repository for parts of the lithosphere that are dragged downward in subduction zones.
Answer: The correct option is A (The asthenosphere is broken up into large continental- and ocean-sized plates.)
Explanation:
Among the components that makes up the earth crust are the lithosphere and the asthenosphere.
The LITHOSPHERE is the outer layer of the earth structure which consists of the upper part of the mantle and the crust.
The ASTHENOSPHERE is a part of the upper mantle just below the lithosphere that is involved in plate tectonic movement and isostatic adjustments. It is denser and weaker layer of the upper mantle which permits the movement of tectonic plates in the lithosphere.
The asthenosphere is the repository for parts of the lithosphere that are dragged downward in subduction zones.Heat from deep within Earth is thought to keep the asthenosphere malleable. And the convection currents within the asthenosphere push magma upward to create new crust. But it is not broken up into large continental- and ocean-sized plates.