The final products of photosynthesis are oxygen and ______
A. Sunlight
B. Water
C. Sugar
D. Carbon dioxide

Answer:

Mass = 7.65kg

Force = 75N

Explanation:

Energy Potential = mass • gravity • height

1500 J = mass • 9.8 • 20

1500 J/(9.8 m/s/s •20 m) = mass

7.65 kg = mass

Force = mass • acceleration

Force = 7.65 • 9.8m/s/s

Force = 75 N

We could also do 1500J/20m as gravity is divided in one and then multiplied again

Force = (1500J • 9.8m/s/s)/(9.8m/s/s • 20m)

Force = 1500J/20m

Force = 75N

this makes sense as Energy is defined as Newton metres  as seen by the work formula, Work = Force • distance

Answer: Mass of the rock= 7.65g

              Force exerted on the ground = 74.9N

Explanation:

potential energy = mass × gravity ×height

1500J = y × 9.8 × 20

1500J=196y

1500 ÷ 196 = y

y= 7.65g

force= mass × gravity

         = 7.65 ×9.8

        =74.9N

Using the concepts of spring, we got that the spring will stretch to d) 20 cm  if the block's weight on the strong spring is doubled.

When a block is attached on the spring ,a tension will generate on the spring which actually helps the block to remain suspended with the string.

Gravity tries to attract the block towards the surface and tension tries to remain the block with the spring. When the weight is doubled, to hold the same block on the spring, more tension will generate. Due to that spring will expand further more in downward direction.

So when weight is doubled, then spring will be expanded by another 10cm means total length of expansion of string will be 20cm.

Hence, for a strong spring is stretched 10 cm by a suspended block. if the block's weight is doubled, the spring will stretch to d)20cm

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Given that the mass of the bike and cyclist is m = 75 kg and the velocity is v = 6 m/s. The height is h= 0 m

Mechanical energy is the sum of kinetic energy and potential energy.

The kinetic energy is given by the formula

The potential energy is given by the formula,

Here, g = 9.8 m/s^2 and is the acceleration due to gravity.

The mechanical energy will be

The wall applies a force of 50 N in the opposite direction. Option C

According to the Newton third law, action and reaction are equal and opposite. We know that when a body exerts a given magnitude of force on a surface, the surface would also a force of equal magnitude back on the surface but the force would now be acting in the opposite direction.

This force that is exerted by the recipient of the force is what we call the reaction force. We are told here that; Howard leans back against a wall with 50 N of force. We are now going to look at the magnitude and the direction of the forces.

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Answer:

The wall applies a force of 50 N in the opposite direction.

Explanation:

Astronomers think the amount of detectable matter as one of some hundred thousand million out of which some are compared and contrasted with the help of modern telescopes.

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The formula used to calculate the energy released when a specific quantity of fuel is burned is Q = m × c × ΔT

We can use the specific heat formula to determine the amount of energy needed to increase the temperature of a known mass of a substance:

Q = m × c × ΔT

In the specific heat formula, Q stands for the energy transferred in joules, m for the mass of the substances in kilograms, c for the specific heat capacity in J/kg degrees C, and T for the temperature change in degrees Celsius.

The relationship between heat energy and temperature is varied in different materials, and specific heat describes how they interact. When heat energy is supplied to a substance, the temperature will vary by a certain amount.

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Given data:

* The weight of the rocket is 1470.39 N.

* The distance traveled by the rocket is 1522.64 m.

* The time taken by the rocket is 2.11 seconds.

Solution:

The velocity of the rocket in terms of the distance and time is,

The mass of the rocket from the weight is,

where g is the acceleration due to gravity,

Substituting the known values,

The kinetic energy of the rocket in terms of mass and velocity of the rocket is,

Thus, the kinetic energy of the rocket is 39.07 MJ.

The total distance moved by the dog is 28meters while the magnitude of the displacement is 4 meters. Moreover, The direction of the displacement is zero degrees.

In Physics, Distance refers to the motion of an object in any direction while displacement is defined as the total distance traveled in a particular direction.

If a dog walks 12 meters to the east and then 16 meters back to the west, then the total distance covered will be calculated as:

Distance moved = 12m (East) + 16m (West)

Total Distance moved = 28 meters [East + West]

Now let's calculate the displacement.

Distance covered towards east (fro origin) = + 12 meters

Distance covered towards west (fro origin) = - 16metres

Displacement = -16 + 12

Displacement = - 4meters (-ve sign represents direction)

|D| = 4 meters

Thus, the magnitude of the displacement is 4 meters

Since the direction of movement is along the x-axis, therefore the direction is zero degrees.

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The complete question is:

A dog walks 12 meters to the east and then 16 meters back to the west.

For this motion, what is the distance moved?

What is the magnitude and direction of the displacement?

Answer:

below

Explanation:

The slope of the  position-time graph is the velocity at any point in time

We have to use Newton's Second Law

Where m = 1,350 kg and a = 4.7 m/s2.

In the space of 30 seconds, a freight train moving at 60 km/h passes a light post. The train is 500 meters long.

The first person to calculate speed by accounting for both the distance travelled and the amount of time required was the Italian physicist Galileo Galilei. Galileo described speed as the distance travelled in a unit of time.

The speed at which an object's location changes in any direction. The distance travelled in relation to the time it took to travel that distance is how speed is defined.

Miles per hour (mph), kilometers per hour (km/h), and meters per second (m/s) are the three most popular speed units (mph). The distance an object covers in a given amount of time is its speed. Speed equals distance x time is the speed equation.

Speed is 60x (5/18) m/s, or 50/3 m/s, and time is 30 seconds. Distance (train length) = speed x time = 50/3 m/s x 30 s = 500 m. 

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The greatest number of beats your heart can pump in one minute is option B: Heart Rate.

Your heart beats on average between 60 to 100 times per minute for adults, which is what is known as your heart rate.

Your body adjusts your heart rate naturally to match what you're doing or what's going on around you. Because of this, your heart rate increases at times of activity, excitement, or fear and decreases during times of rest, serenity, or comfort.

Note that your heart rate is a crucial sign of your general health. A high or slow heart rate may indicate a cardiac condition or other health issues. Having the ability to feel your heartbeat all around your body may also help doctors identify medical issues.

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Answer:

C

Explanation

Maximum Heart Rate

The power dissipated if the resistor A is connected to a 4.00 V battery that has negligible internal resistance is 1.42 W

According to Ohm's law,

V = IR

V = Voltage

I = Current

R = Resistance

For resistor A,

I1 = 0.5 A

V1 = 2.55 V

R1 = 2.55 / 0.5

R1 = 5.1 Ω

I2 = 1 A

V2 = 3.11 V

R2 = 3.11 / 1

R2 = 3.11 Ω

I3 = 2 A

V3 = 3.77 V

R3 = 3.77 / 2

R3 = 1.885 Ω

I4 = 4 A

V4 = 4.58 V

R4 = 4.58 / 4

R4 = 1.145 Ω

R = ( R1 + R2 + R3 + R4 ) / 4

R = ( 5. + 3.11 + 1.885 + 1.145 ) / 4

R = 2.81 Ω

P = V² / R

P = Power

V = 4 V

P = 4² / 2.81

P = 1.42 W

Therefore, the power dissipated if it is connected to a 4.00 V battery that has negligible internal resistance is 1.42 W

The given question is incomplete. The complete question is:

The voltage drop Vab across each of resistors A and B was measured as a function of the current I in the resistor. The results are shown in the table attached. What is the power dissipated in A if it is connected to a 4.00 V battery that has negligible internal resistance?

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Given:

The height from the ground is h = 350 m

The gravitational potential energy is GPE = 120,200 J

To find the mass of the hiker.

Explanation:

The mass of the hiker can be calculated by the formula

Here, g =9.8 m/s^2 is the acceleration due to gravity.

On substituting the values, the mass of the hiker will be

Thus, the mass of the hiker is 35.044 kg

If the spacing between the slits is doubled, then  the distances between bright spots (intensity maxima) on the screen will become half

From the young double slit experiment, we come up with a formula which  is  : β = λD/d, where β is the fringe width,  λ is the wavelength of the light rays, D is the distance between the screen and the source of the rays, and the d is the distance between the two slits. here the distance between the two bright spots is also called the bandwidth. If d is doubled then the value of β will be halved.

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The primary current of transformer is 9A, the secondary voltage is 63.75 V and the output power at 85% efficiency is 650.25 VA.

(a) Turns of primary coil (N₁) = 400

Turns of secondary coil (N₂) = 300

Current on secondary coil (I₂) = 12 A

Current on primary coil (I₁) =

= using transformer equation,

= N₁ × I₁ = N₂ × I₂

= I₁ = (300 ×12) / 400

=  I₁ = 9 A

(b) Voltage of primary coil (V₁) = 85 V

Current on secondary coil (I₂) = 12 A

Power on primary coil (P₁) =

= P₁ = V₁ × I₁

= P₁  = 85 × 9

= P₁ = 765 VA

However, if the efficiency of the transformer is 85% then,

= 85 = (P₂ / P₁ ) × 100

= 0.85 × 765 = P₂

= P₂ = 650.25 VA

(c) Voltage of primary coil (V₁) = 85 V

Current on secondary coil (I₂) = 12 A

Current on primary coil (I₁) = 9 A

Voltage on secondary coil (V₂) =

= using transformer equation,

= I₁ × V₁ = N₂ × I₂

= V₂ = (85 × 9) / 12

= V₂ = 63.75 V

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Answer:

below

Explanation:

350 * 20    has to equal    x * 1.5  

350 * 20   =   1.5 x

x = 4666.7 N

Given data

*The half-life of iodine-131 is t = 8.07 days

*The amount of quantity left is N = 0.25 g

*The number of days is T = 40.35 days

The expression for the radioactivity decay is given as

Substitute the values in the above expression as

Answer:

See below

Explanation:

40.35 days / (8.07 day per half life) = 5 half lives

.25 = x ( 1/2)^5

.25 / ( 1/2)^5 = x = 8 gm originally

We can solve this question by using the principle of calorimetry.

The density of water is 1000 kg/m^3

According to the principle of calorimetry,

Heat lost by hot body = Heat gained by the cold body.

This principle is based on conservation of energy.

Let assume that the final temperature is t(f).

So,

For two liter of water the final temperature is t(f) and initial temperature is 30°celcius,

So here the water will lose heat because it is at higher temperature,

And for 1 liter of water the gain in heat is,

Now,

So the final temperature of the 3 liter water = 26.667 degree cus.

Answer:

Mass: Kg (kilogram)

Length: M (meter)

Answer:

the correct objective is C

Answer:

70.3 kg

Explanation:

The MASS will be the same on the moon as on earth....but the eight is different

gravity of moon =   gravity of earth/6 = 9.81 / 6    m/s^2

F = ma

F/a = m  = 115 N / ( 9.81/6  m/s^2) = 70.3 kg mass

Answer:

Explanation:

Given:

g = 9.8 m/s²

g₁ = g / 6 = 9.8 / 6 ≈ 1.6 m/s²

F = 115 N

____________

m - ?

m  = F / g₁

m = 115 / 1,6 ≈ 71.9  kg

In a vacuum x-rays and microwaves have the same velocity but different wavelengths.

Correct option: D. the same

The required Torque would be 13.0895 Nm.

The force that can cause an object to rotate around an axis is measured in torque.

Similar to how force accelerates an object in linear kinematics, torque accelerates an object in an angular direction.

In rotational kinematics, torque takes the place of force in linear kinematics. There is a direct equivalent to Newton’s 2ⁿᵈ law of motion (F=maF=maF, equals, m, a),

[tex]\tau = I \alphaτ=Iαtau[/tex]= αI

Given,

Time (t) =8.00 sec

Ang Velocity (W) = 400 rev/min

Moment of Inertia (I) = 2.50 kg m²

As we know,

W=Wo+αt T

= αI

400 rev/min to rad/sec-

400 × 2π/60sec = 41.8876 rad/sec

41.8876 rad/sec = 0 + α(8 sec) α = 5.2358 rad/sec²

Torque, T=αI.

T=(5.2358)(2.50)

T=13.0895 Nm

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the net force and acceleration of a falling crate (mass including parachute 132 kg) when the upward force or air resistance is one-fourth of its weight is 7.35m/s²

We know from newton's second law

sum of forces = ma

here, the forces are weight (down) and resistance (up)

choosing down as the positive direction, we have

weight - resistance = ma

mg - [tex]\frac{1}{4}[/tex](mg)=ma

[tex]\frac{3}{4}[/tex] mg = ma or a = [tex]\frac{3}{4}[/tex] g =7.35m/s²

The net pressure is defined as the sum of all the forces appearing on an item. internet force can boost up a mass. some different pressure acts on a body either at relaxation or movement. Internet forces is a term utilized in a system while there may be an extensive range of forces.

the net pressure is the vector sum of forces performed on a particle or object. The internet pressure is an unmarried force that replaces the impact of the unique forces on the particle's motion. It gives the particle equal acceleration as all those actual forces collectively as defined via Newton's 2nd law of motion.

it's miles possible to decide the torque related to the factor of application of an internet pressure so that it maintains the movement of jets of the object below the original machine of forces. Its related torque, the net pressure, turns into the consequent force and has an identical impact on the rotational motion of the object as all actual forces have taken together.

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Answer:

The density of  putty 2 g/cm³

Explanation:

Given:

V₀ = 25 ml = 25 cm³

V = 29 ml = 29 cm³

m = 8 g

______________

ρ - ?

The density of  putty:

ρ = m / (V - V₀)

ρ = 8 / (29 - 25) = 8 / 4 = 2 g/cm³

detectableThe solution to pollution is not dilution. That is, due to the low levels

of contaminants in the effluent and the high volume cmd rate of flow in the St.

Clair River, most substances would be dispersed to the point of undetectability

within ten metres or so, If the contaminants were still decte after ten

kilometres. for example, that would be considered using dilution as a solution.

Since ICI trecrts the waste water before it is released. and with the mixhg zones

ço small, Lusby is confident thd the discharge is hdess because the

concentration is extremely low

The value of the net force is 0 N, and these forces are referred to as balanced forces.

The net force of an object is the sum of all the forces acting on object. The net force on an object gives the resultant force on the object.

The net force on an object is given by the sum of all the forces acting on a particular direction, like sum of the upward forces and sum of the horizontal forces.

Mathematically, the formula for net force on an object is given as;

F(net) = Fₓ₁ - Fₓ₂

where;

F(net) = Fy₁ - Fy₂

The net force acting on the object is calculated as follows;

F(net) vertical force = 50 N - 50 N = 0

F(net) vertical force = 30 N - 30 N = 0

Thus, the object is in state of equilibrium since all the forces acting on the object are balanced.

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In an open system, both energy and matter are exchanged with the surroundings.

In a closed system, only energy is exchanged with the surroundings.

In an isolated system, neither matter nor energy is exchanged with the surroundings.

In the greenhouse, only energy is exchanged with the surroundings.

Thus, the greenhouse is a closed system.

The equal and opposite force for the force of the boy pulling on the bone, the net force is zero.

A boy and a dog are both pulling oppositely on the same bone when the boy pulls as hard as he can. There is no net force. Each dog exerts an equal amount of force in opposing directions, which causes the combined force to cancel out.

Newton's third law :

The equal and opposite force for the force of the boy pulling on the bone, the net force is zero.

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