Answer:

**Answer:**

** 2hr much longer**

**Explanation:**

**Given parameters **

Distance = 600km

Speed 1 = 50km/h

Speed 2 = 60km/h

**Unknown: **

How much longer will it take to travel a distance = ?

**Solution: **

Speed is the distance divided by time;

Speed =

Now;

Time taken =

Time 1;

=

= 12hr

Time 2;

=

= 10hr

To find how much more time;

Time 1 will take 12hr - 10hr,** 2hr much longer** to travel the distance at that rate.

Define reflection.what are the two types of reflection

Which techniques can scientists use to determine the characteristics of Earth's layers? Select the two correct answers.examine the behavior of minerals at extremely low temperaturesstudy how seismic waves travel through different layersdrill deep mines to obtain samples from Earth's mantle and coreconduct experiments about how minerals change under high pressureuse X-rays to obtain a view of Earth's interior layers

A periodic wave travels from one medium to another. Which pair of variables are likely to change in the process? A. velocity and wavelength B. velocity and frequency C. frequency and wavelength D. frequency and phase E. wavelength and phase

The specific heat of substance A is greater than that of substance B. Both A and B are at the same initial temperature when equal amounts of energy are added to them. Assuming no melting or vaporization occurs, which of the following can be concluded about the final temperature TA of substance A and the final temperature TB of substance B?a) TA > TBb) TA < TBc) TA = TBd) More information is needed

In the calorimetry experiment which energy will be calculated during the heat exchange if water is used?

Which techniques can scientists use to determine the characteristics of Earth's layers? Select the two correct answers.examine the behavior of minerals at extremely low temperaturesstudy how seismic waves travel through different layersdrill deep mines to obtain samples from Earth's mantle and coreconduct experiments about how minerals change under high pressureuse X-rays to obtain a view of Earth's interior layers

A periodic wave travels from one medium to another. Which pair of variables are likely to change in the process? A. velocity and wavelength B. velocity and frequency C. frequency and wavelength D. frequency and phase E. wavelength and phase

The specific heat of substance A is greater than that of substance B. Both A and B are at the same initial temperature when equal amounts of energy are added to them. Assuming no melting or vaporization occurs, which of the following can be concluded about the final temperature TA of substance A and the final temperature TB of substance B?a) TA > TBb) TA < TBc) TA = TBd) More information is needed

In the calorimetry experiment which energy will be calculated during the heat exchange if water is used?

**Answer:**

**a)2.46 %**

**b)For 1 :101.52 %**

**For 2 : 99.08 %**

**c)100..4 %**

**Explanation:**

Given that

g₁ = 9.96 m/s²

g₂ = 9.72 m/s²

The actual value of g = 9.8 m/s²

a)

The difference Δ g = 9.96 -9.72 =0.24 m/s²

b)

For first one :

For second :

c)

The mean g(mean )

**a)2.46 %**

**b)For 1 :101.52 %**

**For 2 : 99.08 %**

**c)100..4 %**

The percent difference between the two measurements is 2.44%. The percent error for the first measurement is 1.63%, and for the second measurement is 0.82%. The percent error of their mean is 0.41%.

In physics, the **percent difference** is calculated by subtracting the two values, taking the absolute value, dividing by the average of the two values, and then multiplying by 100. Therefore, the percent difference between the two measurements 9.96m/s² and 9.72m/s² is:

|(9.96-9.72)|/((9.96+9.72)/2)*100 = 2.44%

The **percent error** involves taking the absolute difference between the experimental value and the accepted value, divided by the accepted value, then multiplied by 100. So, the percent error for the two measurements with accepted value of 9.80m/s² are:

For 9.96m/s²: |(9.96-9.80)|/9.80*100 = 1.63%

For 9.72m/s²: |(9.72-9.8)|/9.8*100 = 0.82%

The **percent error of the mean** involves doing the above but using the mean of the experimental measurements:

|(**Mean of measurements - Accepted value)|/Accepted value * 100 |(9.96+9.72)/2-9.8|/9.8*100 = 0.41%**

#SPJ3

**Explanation:**

The given data is as follows.

Mass, m = 62 kg, Initial speed, = 6.90 m/s

Length of rough patch, L = 4.50 m, coefficient of friction, = 0.3

Height of inclined plane, h = 2.50 m

According to energy conservation equation,

(Final kinetic energy) + (Final potential energy) = Initial kinetic energy + Initial potential energy - work done by the friction

Since, final potential energy is equal to zero. Therefore, the equation will be as follows.

Cancelling the common terms in the above equation, we get

=

= 36.055 - 13.23

= 22.825

= 6.75 m/s

Thus, we can conclude that** the skier is moving at a speed of 6.75 m/s when she gets to the bottom of the hill.**

**Answer:**

**Explanation:**

mass, m = 62 kg

initial velocity, u = 6.9 m/s

length, l = 4.5 m

height, h = 2.5 m

coefficient of friction, μ = 0.3

Final kinetic energy + final potential energy = initial kinetic energy + initial potential energy + wok done by friction

Let the final velocity is v.

0.5 mv² + 0 = 0.5 mu² + μmgl + mgh

0.5 v² = 0.5 x 6.9 x 6.9 + 0.3 x 9.8 x 4.5 + 9.8 x 2.5

0.5 v² = 23.805 + 13.23 + 24.5

v² = 123.07

v = 11.1 m/s

**Two things are said to be in contact if the smallest distance between a point in one of them and a point in the other one is zero.**

Ostored

O internal

O heat

Internal energy is the sum of potential and kinetic energies in the particles of a substance.

The type of energy that refers to the sum of potential and kinetic energies in the particles of a substance is **internal energy**.

Internal energy is the total energy of all the particles in a substance, including the energy associated with their motion and stored energy due to their positions or arrangements. It consists of both potential energy (energy stored in the particles' positions) and kinetic energy (energy of the particles' motion).

For example, consider a gas in a container. The internal energy of the gas would be the sum of the potential energy of the gas particles due to their positions and the kinetic energy of the particles due to their motion.

**Answer:**

**separation between the slits is 0.28 mm**

**Explanation:**

**given data **

wave length λ = 589 nm = 589 × m

distance between slits and the screen D = 0.91 m

fringes weight y = 0.19 cm = 0.19 × m

**solution**

we find here the spacing between the two slits i.e d

so use here formula that is

y = λD ÷ d .........................1

put here value we get

0.19 × =

solve we get

**d = 0.28 mm**

**Answer:**

Energy,

**Explanation:**

It is given that,

Wavelength of the photon,

**We need to find the photon representing the particle interpretation of this light. it is given by :**

**So, the energy of the photon is . Hence, this is the required solution.**