Which of the following changes can happen when the forces on an object are unbalanced?a. The object speeds up
b. the object slows down
c. the object changes direction
d. all of the above

Answer:

Gravitational Force – Weakest force; but infinite range.

Weak Nuclear Force – Next weakest; but short range.

Electromagnetic Force – Stronger, with infinite range.

Strong Nuclear Force – Strongest; but short range.

Explanation:

• Gravitational Force  is a weak force, but very long ranged. It is always attractive in mature. It acts between any two pieces of matter in the Universe since mass is its source.
• Weak Nuclear Force is responsible for radioactive decay and neutrino interactions. It has a very short range and as its name indicates, it is very weak in nature. The weak force causes Beta decay i.e. the conversion of a neutron into a proton, an electron and an anti-neutrino.

• Electromagnetic Force  causes electric and magnetic effects such as the repulsion between like electrical charges or the interaction of bar magnets in a similar fashion of attraction & repulsion. It is long-ranged, but much weaker than the strong force. It can be attractive or repulsive and acts only between pieces of matter carrying electrical charge. Electricity, magnetism, and light are all produced by this force.
• Strong Nuclear Force is very short-ranged. It is responsible for holding the nuclei of atoms together. It is basically attractive, but can be effectively repulsive in some circumstances. The strong force is ‘carried’ by particles called gluons; i.e., when two particles interact through the strong force, they do so by exchanging gluons. Thus, the quarks inside of the protons and neutrons are bound together by the exchange of the strong nuclear force.

A gluon is an elementary particle that acts as the exchange particle (or gauge boson) for the strong force between quarks. It is analogous to the exchange of photons in the electromagnetic force between two charged particles.

Quark  is a type of elementary particle and a fundamental constituent of matter.

Answer: You've provided a step-by-step guide for calculating the uncertainty in the volume of a building block due to uncertainties in its dimensions of force.

Explanation:

Pressure in each region is determined by the force applied divided by the surface area. In the case of a fluid in a container, the expression for pressure is given by:

1. Inside the Region: Pressure (P) inside the region can be calculated using the formula: P = F/A, where F is the force applied to the fluid and A is the surface area of the region.

2. Outside the Region: Pressure outside the region can be assumed to be zero if we disregard gravitational effects.

This provides a basic understanding of how to express pressure in each region of the container.

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Answer: The correct answer is Option C.

Explanation:

Ohm's Law is the law which has given a relationship between current, potential difference and the resistance in a circuit. This law states that the current flowing through the conductor is directly proportional to the potential difference across two points.

Mathematically,

or,

where,

V is the potential difference across two points. It is expressed in Volts (V).

I is the current through the conductor. it is expressed in Amperes (A).

R is the resistance. It s expressed in Ohms

We are given:

By putting these values in above equation, we can easily calculate the value of voltage expressed in volts.

Hence, the correct answer is Option C.

A golfer hits a 45 g golf ball during 2.0 × 10⁻³ s causing its final speed to be 38 m/s. The impulse of the golf ball is 1.7 kg.m/s. The average force that the club exerts on the golf ball is 850 N and the average force that the golf ball exerts on the club is -850 N.

A golfer hits a 45 g (m) golf ball resting on a tee so that the golf ball leaves the tee at the horizontal speed of 38 m/s (v). To answer the questions, we need to consider the concepts of impulse and linear momentum.

What is impulse?

Impulse (I) equals the average net external force (F) multiplied by the time (t).

I = F × t   [1]

What is linear momentum?

Linear momentum (p) is defined as the product of a system's mass (m) multiplied by its velocity (v).

p = m × v   [2]

What is the relation between impulse and linear momentum?

The impulse experienced by the object equals the change in the linear momentum of the object.

I = F × t = m × Δv   [3]

The impulse of the golf ball

We will use the equation [3], considering that Δv = v because it starts from the rest.

I = m × v = 0.045 kg × 38 m/s = 1.7 kg.m/s

The average force that the club exerts on the golf ball

The club and the golf ball are in contact for 2.0 × 10⁻³ s (t). We will calculate the average force that the club exerts on the golf ball (Fcg) using the equation [1].

I = Fcg × t

Fcg = I / t = (1.7 kg.m/s)/(2.0 × 10⁻³ s) = 850 N

The average force that the golf ball exerts on the club

According to Newton's third law of motion, action and reaction have the same value and opposite signs. Thus, the average force that the golf ball exerts on the club (Fgc) is -850 N.

A golfer hits a 45 g golf ball during 2.0 × 10⁻³ s causing its final speed to be 38 m/s. The impulse of the golf ball is 1.7 kg.m/s. The average force that the club exerts on the golf ball is 850 N and the average force that the golf ball exerts on the club is -850 N.

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Answer:

Correct answer:  (1)  I =  1.71 kg m/s,  (2)  F = 855 N

Explanation:

Given:

The mass of the ball  m = 45 g = 45 · 10⁻³ kg

Initial velocity V = 38 m/s

Contact time t = 2 · 10⁻³ s

(1)  I = ?

The impulse is calculated according to the formula:

I = m · V = 45 · 10⁻³ · 38 = 1,710 · 10⁻³ = 1.71 kg m/s

I = 1.71 kg m/s

(2)  F = ?

The average force is calculated according to the formula:

F = ΔI / Δt = 1.71 / (2 · 10⁻³) = 855 N

F = ΔI / Δt = 1.71 / (2 · 10⁻³) = 855 N

F = 855 N

God is with you!!!

Answer:

mechanical energy to heat energy to chemical energy