Help answer question in picture

Answer:

[tex]P=7.35\times 10^{3}\ W[/tex]

Explanation:

Given that,

Mass, [tex]m=1.5\times 10^2\ kg[/tex]

It lifts to a height of 15 m in 3 s

We need to find the power of the motor. The formula for power is given by :

[tex]P=\dfrac{W}{t}\\\\P=\dfrac{mgh}{t}\\\\P=\dfrac{1.5\times 10^2\times 9.8\times 15}{3}\\\\P=7.35\times 10^{3}\ W[/tex]

So, the power of the motor is equal to [tex]7.35\times 10^{3}\ W[/tex].

Answer:

It accelerate but will not spin.

Explanation:

If an irregular shaped object is dropped from rest without feeling any form of air resistance it will accelerate without spinning and this is due to the fact that there is no Torque around  the center of gravity

Explanation:

La corriente alterna es de gran importancia, entre otras cosas, porque nos proporciona la red eléctrica domiciliaria. Es aquella con la cual funcionan habitualmente los transformadores y un gran número de dispositivos.

Answer:

are nearby and bright i hope this helps

The magnitude of the potential difference between A and B is 195 V.

The potential of charge A is calculated as follows;

Va = kq/r

where;

Va = (9 x 10⁹ x 2 x 10⁻⁹) / (0.3)

Va = 60 Volts

Vb = kq/r

Vb = (9 x 10⁹ x -3 x 10⁻⁹) / (0.2)

Vb = -135 Volts

VAB = VB - VA

VAB = -135 V - 60 V

VAB = -195 V

Thus, the magnitude of the potential difference between A and B is 195 V.

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Answer:

v = 1.48 m / s

Explanation:

This is an exercise in conserving the moment. Let's define a reference system made up of the student, the scooter and the collected mass. For this system the forces during the collection are internal and element and conserves

initial interim. Before picking up the merchandise

       p₀ = M v₀

final instant. After picking up the object

       p_f = (M + m ') v

how the moment was created

        p₀ = p_f

       M v₀ = (M + m) v

let's calculate

       v = [tex]\frac{M}{m+ M}[/tex]  vo

       v = 78.2 / (6.4 +78.2) 1.60

       v = 1.48 m / s

Answer: where is the examples?

Explanation:

The type of radiation which can damage the living cells are the X-rays, beta particles, and the gamma rays. Thus, the correct option is A.

Radiations have been found to damage the DNA molecules present in the cells. High doses of the radiation damage the cell and these radiations could lead to Acute Radiation Syndrome (ARS) or Cutaneous Radiation Injuries (CRI). High doses of these radiation could also lead to formation of tumor and cancer later in the life.

Gamma rays are the most harmful external hazard or radiations among all the radiations and these result into acute effects. Beta particles are also harmful to the cell because these can partially penetrate the skin, causing beta burns in the skin. Alpha particles cannot penetrate the intact skin. Gamma and x-rays can pass through a person which results into damaging cells in their path.

Therefore, the correct option is A.

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Answer:

its d

Explanation:

Answer:

the focal length of the eyepiece is 17.23 cm

Explanation:

The computation of the focal length of the eyepiece is shown below:

= Focal length of objective lens ÷ angular magnification magnitude

= 86.3 ÷ -5.01

= 17.23 cm

Hence, the focal length of the eyepiece is 17.23 cm

We simply divided the angular magnification magnitude from the focal length of objective lens so that the focal length of the eyepiece could come

Answer:

The answer is C, I just guessed and got it right lol

Explanation:

Answer:

Newton's first law of motion - The law of inertia

Explanation:

The student's claim violates Newton's first law of motion which states that a body will continue in its state of rest or uniform motion except a force is applied to change that state of rest or uniform motion.

In the case of the student, no external force is applied to the basketball, so as to change its inertia, so it continues to stay in the same position. But, the student assumes that the kinetic energy of the ball will change as its thermal energy can be converted to kinetic energy.

This is incorrect because, the thermal energy only raises the temperature of the basketball and thus the energy of the molecules of the ball, it cannot cause the kinetic energy of the basketball to change since it applies NO FORCE to be basketball so as to change its inertia.

Answer:

True

Explanation:

The electromagnetic spectrum can be regarded as term that give description of range of light that are in existence, and this range from radio waves up to gamma rays. It can be explained as

range of frequencies that electromagnetic radiation takes with thier respective wavelengths as well as photon energies

The Types of electromagnetic radiation that make up the electromagnetic spectrum are

✓ microwaves

✓ infrared light

✓ ultraviolet light

✓X-rays,

✓gamma rays.

Answer:

E = hf. Plank's constant

L=mvr  Angular momentum

F • t = m • Δ v. Implulse

: σ = F/A  Stress

Explanation:

for youngs modulus its in the pictuure

Answer:

option c is the correct one

Answer:

3

Explanation:

Answer:

whether a net force acts on the object

Answer:

D.Conduction, because the metal wire was in direct contact with water in both containers

Conduction, because the metal wire was in direct contact with water in both containers.​ Option D is correct.

Given that,
Students filled two cups with water. One cup contains 100mL of cold water while the other has 100 mL of hot water. A metal heat wire is placed inside the water of both cups and thermometers are attached to each cup.
It is to be identified, the system contains which type of heat transfer between the cups

Heat transfer is the process, in a thermodynamic system, when an object at a higher temperature is placed with an object at has a lower temperature, after some time the system attains equilibrium because heat flows from higher temperature to lower temperature.

In the given question,
Cups, that are connected through a metal wire, one is hot and the other is cold, Principal of conduction state that when there is a system of connected bodies the heat flows throughout the connected system till the thermal equilibrium attain. Implies heat flow from hot cup to cold cup through the wire through conduction heat transfer.

Thus, Conduction, because the metal wire was in direct contact with water in both containers.​ Option D is correct.

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Answer:

Explanation: the major difference between an electromagnet and permanent magnet is that the former can have a magnetic field when electric current flows through it and disappears when the flow of the current stops. ... It will always displays the magnetic behaviour.

Answer:

the answer to the question is indeed B

Answer: High pass filters, and in particular LC high pass filters are used in many RF applications where they block the lower frequencies and allow through higher frequency signals. Typically LC filters are used for the higher radio frequencies where active filters are not so manageable, and inductors more appropriate.

Answer:

high pass filters and in particular LC high pass filter are used in many RF application where they block the lower frequencies and allow through higher frequency signals. Typically LC filters are used for the higher radio frequencies where active filters are not so manageable and indicators more appropriate

If the surface area becomes smaller, the pressure becomes larger.

Answer:

Isopropyl alcohol would form smaller droplets because it has a lower surface tension than water has.

Explanation:

The complete options are;

A. The average kinetic energy of their particles is the same.

B. The total kinetic energy of their particles is equal.

C. Heat flows from the larger object to the smaller object.

D. Heat flows from the object with higher potential energy to the object with lower potential energy.

Answer:

Explanation:

From the relationship between average kinetic energy and temperature, we have the formula;

E_k = (3/2)kT

Where;

k is a constant known as boltzmann constant.

T is known as temperature

We can see that at the same temperature (T), kinetic energy will remain the same because from the formula, E_k depends km only the temperature.

Thus, average kinetic energy of their particles saying that.

Answer:

well

Explanation:

basically it's like

Answer:

a = 6 x 10¹⁶ m/s²

Explanation:

The acceleration of the electrons can be found by using the third equation of motion:

[tex]2as = v_f^2-v_i^2[/tex]

where,

a = acceleration = ?

s = distance = 1.4 cm = 0.014 m

vf = final speed = 4.1 x 10⁷ m/s

vi = initial speed = 0 m/s

Therefore,

[tex]2a(0.014\ m) = (4.1\ x\ 10^7\ m/s)^2-(0\ m/s)^2\\\\a = \frac{1.681\ x\ 10^{15}\ m^2/s^2}{0.028\ m}[/tex]

a = 6 x 10¹⁶ m/s²

The acceleration of the electron will be a = 6 x 10¹⁶ m/s²

The acceleration is defined as when the velocity of any moving object changes with respect to the time it is called as the acceleration.

The acceleration of the electrons can be found by using the third equation of motion:

[tex]2as=v_f^2-v_i^2[/tex]

where,

a = acceleration = ?

s = distance = 1.4 cm = 0.014 m

vf = final speed = 4.1 x 10⁷ m/s

vi = initial speed = 0 m/s

Therefore, By putting the values we will get

[tex]2a(0.014)=(4.1\times 10^7)-(0)[/tex]

[tex]a=\dfrac{1.681\times 10^{15}}{0.028}[/tex]

a = 6 x 10¹⁶ m/s²

Thus the acceleration of the electron will be a = 6 x 10¹⁶ m/s²

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Complete question:

It is measured that 3/4 of a body's volume is submerged in oil of density 800kg/m³. What is the specific gravity of oil?

Answer:

The specific gravity of the oil is 0.8.

Explanation:

Given;

density of the oil, [tex]\rho_o[/tex] = 800 kg/m³

density of water, [tex]\rho_w[/tex] = 1000 kg/m³

The specific gravity of any substance is the ratio of the substance density to the density of water.

Specific gravity of the oil = density of the oil / density of water

Specific gravity of the oil = 800/1000

Specific gravity of the oil = 0.8

Therefore, the specific gravity of the oil is 0.8.

Answer:

the answer is  C

Explanation:

i took the test just now so i am glad i can help someone in the future❣❣❣❣

Also here is the explanation

Note that the magnitude of acceleration (a) is given by a =  

v2

R

, where v is the speed and R is the radius. Because acceleration is the same for both bikers, the ratio 

v2

R

, also has to be the same for both. Given that Kevin’s speed is higher, the radius of his path must also be higher to maintain the same ratio. Therefore, Kevin’s circular path has a bigger radius than Linda’s path.

Answer:

Carbon dioxide

Explination:

I remember it from biology.

I hope this helps ^-^

In a chemical reaction, carbon combines with oxygen to form carbon dioxide gas.

A chemical reaction can be defined as a process that causes the chemical transformation of one chemical substance to another. The chemical reactions accompany chemical changes that involve the rearrangement of electrons in the forming and breaking of bonds between atoms, with no change to the nuclei.

The substances which are primarily involved in a reaction are known as reactants or reagents. Chemical reactions are commonly characterized by a chemical change, and yield products, which exhibit properties different from the reactants.

Chemical reactions take place at a characteristic rate of reaction at a given temperature, pressure, and chemical concentration. The rates increase with the increasing temperature of the reaction when more thermal energy is available to achieve the activation energy for breaking bonds between atoms.

The combustion reaction takes place when carbon combines with oxygen to produce carbon dioxide gas.

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Answer:

lower potential

Explanation:

Given that,

An electron with an initial speed of 700,000 m/s is brought to rest by an electric field. The electric field is defined as the electric force per unit charge. The electron must go in the opposite direction to get to the rest. It would imply that the electron would move in a region of lower potential.