Answer:
19 pizzas
Explanation:
1 pizza = 3 boys
=> 56 ÷ 3 = 18.666666666666.. or about 19 pizzas
Explain why the roller coaster’s potential energy is greater at point 1 than at point 4.
Answer:
Answer: 1/17/2020
Potential energy is directly related to the height of an object. Point 1 is higher than point 4, so the potential energy is greater at point 1.
Hope this helps! ~lexi
✧･ﾟ: *✧･ﾟ:* *:･ﾟ✧*:･ﾟ✧✧･ﾟ: *✧･ﾟ:* *:･ﾟ✧*:･ﾟ✧✧･ﾟ: *✧･ﾟ:* *:･ﾟ✧*:･ﾟ✧･ﾟ: *✧･ﾟ:*
A rock is thrown downwards from the edge of the Grand Canyon. With
what velocity will it hit the donkey-riding tourist who is 40 m below?
Answer:
Vf = 28 m/s
Explanation:
In order to find the final velocity of the rock, we will use the 3rd equation of motion. The third equation of motion for vertical direction is written as follows:
2gh = Vf² - Vi²
where,
g = acceleration due to gravity = 9.8 m/s²
h = height dropped = 40 m
Vf = final velocity of the rock = ?
Vi = Initial Velocity of the rock = 0 m/s (since, rock was initially at rest)
Therefore,
(2)(9.8 m/s²)(40 m) = Vf² - (0 m/s)²
Vf = √(784 m²/s²)
Vf = 28 m/s
How can fluid friction be decreased?
Answer: by giving special shapes called streamlined shape to the objects
Explanation:
what is the slope of this blue line
Gradient of the line is m =-2/5
Answer:
y = x-2
Explanation:
When x = 0, y = 4
When y = 0, x = 6
What does science explain?
A) moral values
B) Biased opinion
C) Meaning of life
D) Natural phenomena
Answer:
D - Natural Phenomena
Answer:
D) Natural phenomena
Explanation:
science can't explain the others
During a race, you speed up from 2.5 m/sec to 4.4 m/sec in 3.4 seconds.
(a) What is your change in speed?
1.9
m/sec
(b) What is your acceleration?
0.55
X m/sec2
Aluminum hydroxide is a common _________
Answer:base
Explanation:apex
water is used in hot water bag why
Answer:
Explanation:
Water has highest specific heat compared to other liquids , therefore water gives out largest amount of heat for a fixed temperature change , as compared to other liquids i.e. it cools down slowly than any other liquid . Hence used in hot water bags so that bag remains hot for a long time .
Using Newton's 2nd law,find the mass if the force is 18 N and the acceleration is 2 m/s/s.
Answer:
9 kg
Explanation:
According to Newton's second law:
[tex]f = ma[/tex]
[tex]m = \frac{f}{a} [/tex]
Given:
f = 18 N
a = 2 m/s^2
Substitute the given values in the formula.
[tex]m = \frac{18}{2} [/tex]
[tex]m = 9[/tex]
which element on the periodic table has the largest atomic number?
Answer:
Oganesson
Oganesson has the highest atomic number and highest atomic mass of all known elements. The radioactive oganesson atom is very unstable, and since 2005, only five (possibly six) atoms of the isotope 294Og have been detected.
Explanation:
1. List the point where the car has the greatest potential energy.
2. List the point where the car has the least potential energy.
3. List the point where the car has the greatest kinetic energy.
4. List the point where the car has the least kinetic energy.
Answer:
1) The point where the car has the greatest potential energy is Point A
2) The point where the car has the least potential energy is Point C
3) The point where the car has the greatest kinetic energy is Point C
4) The point where the car has the greatest kinetic energy is Point A
Explanation:
The potential energy of the car is given by the formula, PE = Mass × Gravity × Height
Therefore, as the height increases, the potential energy of the car increases
The total mechanical energy of the car, which is constant, is given by the following equation
The total mechanical energy = The Potential Energy + The Kinetic Energy
Therefore, at the point where the potential energy is lowest, the kinetic energy is highest.
what is a formula unit
A formula unit is the empirical formula for an ionic compound. It is the lowest possible ratio of the cations and anions of a given ionic compound.
As you add heat, what happens to the kinetic energy of atoms?
The atoms in a hot object move faster than atoms in a cold object.
Answer:
The atoms in a hot object move faster than atoms in a cold object. The atoms in a hot object have more kinetic energy than the atoms in a cold object. Adding heat to a substance will make the atoms vibrate more and when heat leaves the substance; the atoms will vibrate less. Potential energy is stored energy.
the primary_______ cortex specializes in receiving signals from different parts of the body?
Answer:
somatosensory
Explanation:
The primary somatosensory cortex specializes in receiving signals from different parts of the body.
Are these right? Just need you to confirm or tell we what I got wrong. Thanks
Answer:
yes it is write
Explanation:
this is my exam question be serious
a. what are professions and manpower related to teaching field? describe any one
b. write the name of any four diseases that attack on cows and buffaloes. explain any two of them
c. "modern technology is developed from ancient technology."justify this statement.
Answer:
hey answer in the comment section
How much time will it take an armadillo traveling 0.1 m/s to go 2010 meters?
Answer:
20100s
Explanation:
A 100.0-kg bakery sign hangs from two thin cables as shown.
What is the tension in each cable?
Answer:
1. T₁ = 500 N
2. T₂ = 866 N
Explanation:
Please see attached photo for the diagram.
Thus, we can obtain obtained the value of T₁ and T₂ as follow:
1. Determination of T₁
Angle θ = 30
Hypothenus = 100 kg
Opposite = T₁ =?
Sine θ = Opposite /Hypothenus
Sine 30 = T₁ / 100
Cross multiply
T₁ = 100 × Sine 30
T₁ = 100 × 0.5
T₁ = 50 Kg
Multiply by 10 to express in Newton
T₁ = 50 × 10
T₁ = 500 N
2. Determination of T₂
Angle θ = 60
Hypothenus = 100 kg
Opposite = T₂ = ?
Sine θ = Opposite /Hypothenus
Sine 60 = T₂ / 100
Cross multiply
T₂ = 100 × Sine 60
T₂ = 100 × 0.8660
T₂ = 86.6 Kg
Multiply by 10 to express in Newton
T₂ = 86.6 × 10
T₂ = 866 N
true or false money difficult to carry around
Answer
yeard
Explanation:
cause it is
Answer:
The answer is true
a wire has current 5A in it.how much charge pass a point in wire in 2 min..???
Answer:
600 Coulomb
Explanation:
Electric Current refers to the charge passing through unit cross section of a wire per second.
Current ( C / sec) = 5A = 5C / sec
So, 5C charge passes through the wire in one second, then, amount of charge passing through a cross section of the wire in 120 seconds is :
5C * 120 = 600 Coulumb
A car accelerates uniformly from rest at 2.2 m / s^2 for 3.0 s.Calculate the speed of the car at time t = 3.0 s
Answer:
6.6m/s
Explanation:
we know that
v = u + at
= 0+ 2.2*3
=6.6m/s
YO CAN ANYONE PLS ANSWER DIS PLS!!!!!!!!
Answer:
38ml
Explanation:
Answer:
38 ML
Explanation:
How do electromagnetic and mechanical waves compare?
Sven's team put its insulated ice cube into a sealed plastic container. Which
type of thermal energy transfer was the team trying to prevent?
A. Radiation
B. Convection
C. Conduction
D. Translation
Answer:B
Explanation:
Pls help ASAP now! This is physical science
Option A is correct answer
Answer:
A
Explanation:
D and C are both eliminated because it being shaped like a horseshoe has nothing yo do with it and c is wrong cause the core is really hot there for it can not be similar so A because it has north and south poles meaning its magnetic ability
Help please!! 20 points
Answer:
I cant hardly read the words for me to answer
Explanation:
Why do high water temperatures reduce the amount of fish in a water ecosystem? A. High temperatures decrease the nutriet level B. High temperatures can lower pH of the water C. High temperatures can decrease turbidity D. High temperatures can reduce the amount of dissolved oxygen in the water
Answer:
The correct option is D
Explanation:
Generally when there is an increase in temperature of water the solubility of oxygen decrease and this would in turn decrease the amount of fish in water due to the fact that fish require oxygen soluble oxygen to survive
Which of the following shows places on the Earth's surface the most accurately?
A.thematic maps
B.globes
C.general purpose maps
D.physical maps
I believe that the answer is D physical map.
Answer:
b: globes
Explanation:
the earth cannot be accurately put onto a map without distortion in places away from the equator
If the light bulb is 2 ohms and the battery is 3V what is the total current in the circuit?
Answer:
3 volts / 2 ohms =1.5 Amperes
using the rules for the significant figures what do you get when you add 24.545 and 307.3
Answer:
331.8 (Plato/Edmentum)
Explanation:
#1: 24.545 + 307.3
#2: 331.845
#3: 331.8