Your shopping cart has a mass of 65 kilograms. In order to accelerate the shopping cart down an aisle at 0.30 m/s2 What force would you need to use or apply to the cart. I don't know how to solve this

Answers

Answer 1

Answer: Justin ! Justin ! ! You're in high school Physics. You've done Newton's Laws until you saw them in your sleep. When the wind rustles through the trees, you almost hear it whispering to you "F = M A". Now is the time to use that ! M=65kg. A=0.3m/s^2. F = (65)(0.3)=19.5 newtons.

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____________ is the total energy of a system.a. Entropy
c. Enthalpy
b. Fusion
d. Gibbs energy

Answers

The correct answer is letter c. Enthalpy (H). Entrophy means the measure of the degree of disorder. Gibbs energy formulated by Josiah Willard Gibbs and it is the energy associated with a chemical reaction to do work.Fusion is the combining light nuclei into a heavier nucleus.

Which statement best describes an antacid? a)An antacid increases the amount of hydrogen ions b)An antacid neutralizes excess hydrogen ions. c)An antacid decreases the level of hydrogen ions.

Answers

Answer:

The correct answer is option A, An antacid neutralizes excess hydrogen ions.

Explanation:

Antacid neutralizes the acid in the stomach. These are bases/ alkali's. The reaction between an acid and a base in known as neutralization thereby reducing burning sensations produced by the acid.

The antacid when reaches the stomach form gel like composition that lie on the top of food item in the stomach and prevent the oesophagus from the irritation caused by the acid.

Answer: option A

Explanation: ur welcome

Explain why a light wave refracts when it travels through mediums such as air to water.

Answers

The simplest explanation is that the speed changes. That causes the wavefront to change direction and so refraction takes place.

Different velocity-time graph lines are shown, displaying the behavior of multiple race carts along a linear track.Which description correctly identifies cart C?

A) Has a positive acceleration and is speeding up.
B) Moving with zero acceleration.
C) Moving at a constant acceleration.
D) Has a negative acceleration and is slowing down.

Answers

B) Moving with zero acceleration.

Explanation:

Acceleration is defined as the rate of change of the velocity per unit time:

$a=(\Delta v)/(\Delta t)$

In a velocity-time graph, this ratio corresponds to the slope of the curve. In fact:

$\Delta v$ (change in velocity) corresponds to the increase in the y-axis

$\Delta t$ (change in time) corresponds to the increase in the x-axis

So, acceleration corresponds to the slope of the curve in a velocity-time graph. For cart C, the slope is zero, therefore the acceleration is also zero.

Answer:

B) Moving with zero acceleration.

Explanation:

As we can see the graph for Cart C that its velocity is constant and not changing its magnitude as well as its sign

So here the magnitude and direction is constant so we can say that velocity will remain constant always.

Where we can define the acceleration as

$a = (dv)/(dt)$

so here if magnitude and direction both are constant so

$a = 0$

so we can say that acceleration of cart C is ZERO

so correct answer will be

B) Moving with zero acceleration.

What is the advantage of designing a thermos so that it has a vacuum layer surrounding the area where hot liquids are stored?

Answers

The vacuum layer will prevent heat losses due to conduction and convection completely as it will provide no medium for these phenomena.

Answer:

insulator

Explanation:

Irina rode her bike to work at an average speed of 16 miles per hour. It started to rain, so she got a ride home along the same route in her coworker’s car at an average speed of 27 miles per hour. If Irina’s ride home in the car took 24 minutes (0.4 of an hour), how many hours was her bike ride to work, to the nearest tenth of an hour?

Answers

Answer:

0.7 hours

Explanation:

From the way back, we can calculate the distance between Irina's work and Irina's home. In fact, we know that the car takes 0.4 hourse traveling at 27 mph, so the distance covered should be

$d=vt=(27 mph)(0.4 h)=10.8 mi$

When Irina rides to work with her bike, she travels at a speed of 16 mph. So we can find the time she takes by dividing the total distance (10.8 miles) by her speed:

$t=(d)/(v)=(10.8 mi)/(16 mph)=0.7 h$

Average speed of Irina riding home in her coworkers car = 27 miles per hour
Time taken by Irina to reach home = 0.4 hour.
Then
In 1 hour the car traveled for a distance = 27 miles
So in 0.4 hour, the distance traveled by the car = 27 * 0.4 miles
= 10.8 miles
Now
While traveling to office, Irina travels 16 miles in = 1 hour
So
Irina travels 10.8 miles in = (16/10.8) hours
= 1.48 hours.]
So Irina takes 1.48 hours of bike riding to reach her place of work.

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