A What quantity is equal to​

The correct answer is A. an increase in Earth's average surface temperature.

While all of these are aspects of global warming, option A best summarizes it.

Answer:

v = 12.8 m/s

Explanation:

Applying the law of conservation of energy:

[tex]m_1u_1+m_2u_2=m_1v_1+m_2v_2[/tex]

where,

m₁ = mass of baseball = 149 kg

m₂ = mass of catcher = 57 kg

u₁ = initial speed of ball = 17.7 m/s

u₂ = initial speed of catcher = 0 m/s

v₁ = v₂ = v = final speed of ball and the final speed of catcher = ?

both are same because ball is in hands of cathcer in the final state.

Therefore,

[tex](149\ kg)(17.7\ m/s)+(57\ kg)(0\ m/s)=(149\ kg)(v)+(57\ kg)(v)\\\\v = \frac{2637.3\ kgm/s}{206\ kg}[/tex]

v = 12.8 m/s

Answer:

B: 50 N/m

Explanation:

Hopes it help.

The spring constant of the spring is 50 N/m. The correct option is B.

When the spring is compressed, it gets compressed up to its elastic limit. When load is removed from the spring, it regains its shape and obtains equilibrium position. The energy stored in this process is called as spring potential energy.

Given a spring has 100 J of EPE when it is stretched 2 m. The energy stored in the spring is given by

SPE = ½ kx²

100 = ½ k (2 m)²

k = 50 N/m

So, spring constant of the spring is 50 N/m.

Thus, the correct option is B.

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Answer:

B = 0.159 T

Explanation:

Given that,

Current, I = 0.38 A

The average velocity of the electron, [tex]v=5.5\times 10^{-6}\ m/s[/tex]

The average magnetic force on the electron, [tex]F=1.4\times 10^{-25}\ N[/tex]

We need to find the flux density B of the magnetic field. We know that the magnetic force is given by :

[tex]F=qvB\\\\B=\dfrac{F}{qv}[/tex]

Put all the values,

[tex]B=\dfrac{1.4\times 10^{-25}}{1.6\times 10^{-19}\times 5.5\times 10^{-6}}\\\\B=0.159\ T[/tex]

So, the required flux density of the magnetic field is 0.159 T.

Answer: unit n/c

Explanation: This should be the answer because I just asked my Physics Teachers I hope this is correct

Hope This Helps :)

The electric field between the plates will be 0.1667×10⁵ C.

An electric field is an electric property that is connected with any location in space where a charge exists in any form. The electric force per unit charge is another term for an electric field.

The electric field formula is as follows:

E = F /Q

Where,

The electric field is denoted by the letter E.

F is Electric force

The charge is Q.

Given data;

Q (Charge)= 8.38 × 10¯¹¹ C ,

A (Area between the plates) = 5.68 × 10¯⁴ m²,

ε₀(permeability constant) = 8.85 × 10¯¹² C²/Nm²

[tex]\rm E= \frac{Q}{K \epsilon_0 } \\\\ \rm E= \frac{8.38 \times 10^{-11}}{5.68 \times 10^{-4} \times 8.85 \times 10^{-12} } \\\\ E= 0.1667 \times 10^5 \ N C^{-1}[/tex]

Hence,the electric field between the plates will be 0.1667×10⁵ C.

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Answer:

The main difference between these types of motion is that circular motion is a special case of rotational motion, where the distance between the body’s centre of mass and the axis of rotation remains fixed.

Rotational motion is based around the idea of rotation of a body about its center of mass. In rotational motion, the axis of rotation and centre of mass could change whereas in circular motion, the axis of rotation and centre of mass does not change.

Circular motion is a movement of an object along the circumference of a circle or rotation along a circular path and can either have a constant angular rotation rate and constant speed, or it can exist with a changing rate of rotation.

Think of one of those fairground rides where people sit on dummy horses. Now imagine the horses spin around the post that holds them to the base of the ride. Then you have both rotational motion of the horse and circular motion as the horses move around the ride.

Answer:

3.36 Joules

Explanation:

Work done= Force × distance

F=4.2 N

distance= 0.8 m

work done= 4.2 × 0.8

work done= 3.36 Joules

Answer:

They first spend it on necessities.

Answer:

110.23113077052545

Explanation:

Answer:

Cerebrospinal fluid (CSF) is a clear fluid that surrounds the brain and spinal cord.

Answer:

395 m/s

Explanation:

By using the first equation of motion,

→ v = 75 + 8(40)

→ v = 75 + 320

→ v = 395

Answer:

Explanation:

Quantum mechanics tells us that light can behave simultaneously as a particle or a wave. However, there has never been an experiment able to capture both natures of light at the same time; the closest we have come is seeing either wave or particle, but always at different times.When UV light hits a metal surface, it causes an emission of electrons. Albert Einstein explained this "photoelectric" effect by proposing that light – thought to only be a wave – is also a stream of particles

Why is light considered a wave and a particle?

Light behaves mainly like a wave but it can also be considered to consist of tiny packages of energy called photons. Photons carry a fixed amount of energy but have no mass. They also found that increasing the intensity of light increased the number of electrons ejected, but not their speed

Answer:A 2.2kg block of ice slides across a rough floor. Its initial velocity is 2.5m/s and its final velocity is 0.50m/s. How much of the ice block melted as a result of the work done by friction? (Latent Heat of water is 3.3*10^5J/kg)

Explanation:

The heat produced by friction between a skate and the ice during movement over the surface melts the topmost layer of ice. However, even when you are still, ice is still slick. When you remain still on ice, there is no friction to produce heat, but the ice is still slippery.

Although friction does generate heat, the amount of heat it produces is insufficient to melt ice that is at a very low temperature. But even at low temperatures, ice still creates a slick liquid layer. The formation of a slippery coating even when the item is totally still cannot be explained by frictional heating.

Therefore, A rough floor is traversed by a 2.2 kg lump of ice. It moves at a final speed of 0.50 m/s after starting out at 2.5 m/s. What portion of the ice block melted as a result of the friction's work? (Water has a latent heat of 3.3×105 J/kg.)

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Answer:

7

Explanation:

please find your answer in the attached image, than you for 48 points.

The ray in the water makes an angle of 38° with the normal, so the angle of incidence is 55°.

The angle of incidence is defined as the angle between a ray incident on a surface and the line which is perpendicular to the surface at the point of incidence called the normal. The beam can be created by any wave, such as optical, acoustic, microwave and X-ray.

Angle of incidence can be find out by Snell's Law. For the above given information,

Speed of light in water, v = [tex]2.2506 * 10^8 m/s[/tex]

Speed of light in vacuum, c=  [tex]3* 10^8 m/s[/tex]

Refractive index  (µ)= c/ v

So, Refractive index = [tex]3 * 10^8 / 2.2506* 10^8[/tex] = 1.33

Using Snell's Law,

µ of air *  sin θ =  µ of water * sin 38°

1 * sin θ = 1.33 * 0.61

sin θ = 0.811

θ = 55°

Thus, the ray in the water makes an angle of 38° with the normal, so the angle of incidence is 55°.

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Answer:

The Liver, Pancreas and Gall Bladder are involved in the process of delivering the digestive juices for the Intestines

Explanation:

Answer:

Atoms are composed of electrons (charge -1), protons (charge +1), and neutrons (no charge). So in a neutral atom the correct answer is "D".

Answer:

A vacuum would have been created. I hope this helps have a great day

Answer:

b. compensate for changes in the Earth's atmosphere and achieve better resolution.

Explanation:

Answer:

Please provide more information!

Explanation:

Answer:

1.75

Explanation:

Answer:

The type of reaction represented by the model is an;

Exothermic reaction

Explanation:

Exothermic reaction reaction is a reaction that involves the giving off of excess energy as heat and or light by two or more reactants during a chemical reaction due to the higher combined energy of the reactants compared with the product

The analogy are;

The sponge balls are the reacting atoms

The water is the energy which they contain

The water given off is the excess energy which the compound formed by putting together the two soaked sponge balls is unable to hold.

Answer:

Explanation:

The funny-looking circle is a hint but iii confirms we are talking about Eartth's magnetic field here :)

i. A is North Pole while H is the magnetic North Pole. D is the equator while C is the magnetic equator.

ii. I, the tilt angle, is about 11 degrees.

iii.  A freely suspended magnet inclines towards HF or AG because it always points towards North/South.

Answer:

Explanation:

A is North Pole, D equator. H is the magnetic North Pole n C the magnetic equator.

I is 10-12 degrees

magnet points to N-S direction as in a compass

Answer:

Hey!

_________________

Voltage (V) = 0.8V

Current (I) = 200 mA = 200/10^3 = 2/10

Resistance = ?

Resistance = Voltage / Current

Voltage = Current × Resistance

0.8 = 2/10 × Resistance

0.8×10/2 = Resistance

8/2 = Resistance

Resistance = 4 ohm

_________________

Hope it helps...!!!

Explanation:

Answer:

True

Explanation:

When two distinct elements are chemically combined—i.e., chemical bonds form between their atoms—the result is called a chemical compound. Most elements on Earth bond with other elements to form chemical compounds, such as sodium (Na) and Chloride (Cl), which combine to form table salt (NaCl).

Hope this helps!!

Answer:

a) Yes, this is kinda the best way to split the teams.

b) Force (or acceleration, these are proportional)

Explanation:

For both questions, we should start with the second Newton's law.

This law can be written as:

F = m*a

force equals mass times acceleration.

a) For the case of the rope, the ideal situation is having almost the same mass in both ends of the rope, in this way, the relation between force and acceleration in each end will be equivalent. (while one could argue that 3 smaller people will actually have a larger mass than the two bigger ones) but yes, this way is a good way to split the teams, so the mass is as even as possible.

b) Acceleration is defined as the rate of change of the velocity.

Again, by the above equation:

F = m*a

We need to have a force if we want to have acceleration.

Then, if an object has constant velocity (if the object is at a full stop, then it has a constant velocity of 0 m/s) we need to apply a force to this object if we want to change its motion.

Similarly, if an object is accelerating, we can apply a force to the object in order to cancel that acceleration (if the net force applied in the object is zero, then the acceleration is zero)

So here we can conclude that a force is what causes an object to change its motion.

Answer:

W = 0 J

Explanation:

The amount of work done by gas at constant pressure is given by the following formula:

[tex]W = P\Delta V[/tex]

where,

W = Work done by the gas

P = Pressure of the gas

ΔV = Change in the volume of the gas

Since the volume of the gas is constant. Therefore, there is no change in the volume of the gas:

[tex]W = P(0\ m^3)\\[/tex]

W = 0 J

The answer is A) In the X-direction.

This is the case because, when you are asked about speed on a motion graph, the steeper the line gets, the faster it is going. In the first motion graph "Distance vs Time (X-direction)" the line is getting steeper, so that means it is going faster than the line depicted on the second graph.

Answer:

Mandaloun won the race.

Explanation:

First, we will calculate the time taken by the Hot Rod Charlie:

[tex]s = vt\\t = \frac{s}{v}[/tex]

where,

t = time taken by Hot Rod Charlie = ?

s = distance covered = 1.25 miles

v = speed of Hot Rod Charlie = 0.79 miles/min

Therefore,

[tex]t = \frac{1.25\ miles}{0.79\ miles/min} \\t = 1.58 min[/tex]

Since Hot Rod Charlie took more time (1.58 min) than the Mandaloun (1.52 min).

Therefore Mandaloun won the race.