11. The kinetic energy of an 80-kg object moving at 10 m/s is 2000 J 4000...
11.
The kinetic energy of an 80-kg object moving at 10 m/s is
2000 J
4000 J
6000 J
100 J
1000 J
12.
The kilowatt-hour is a unit of
speed
power
force
momentum
energy
13.
Energy sources used today (in the U.S.) are, mostly, from:
hydroelectric dams
solar panels
nuclear power stations
geothermal sources
fossil fuels
14.
What is the velocity of a 30-kg box with a kinetic energy of 6,000 J?
64 m/s
6.0 m/s
18 m/s
20 m/s
36 m/s
15.
The law of conservation of energy is a statement that
energy must be conserved and you are breaking a law if you waste energy.
the total amount of energy is constant for a closed system.
the supply of energy is limited so we must conserve.
energy can be used faster than it is created.
energy cannot be used faster than it is created.
Homework Answers
Add Answer to:
11.
The kinetic energy of an 80-kg object moving at 10 m/s
is
2000 J
4000...
An object has a kinetic energy of 284 J and a momentum of magnitude 23.5 kg · m/s. (a) Find the speed of the object....
An object has a kinetic energy of 284 J and a momentum of magnitude 23.5 kg · m/s. (a) Find the speed of the object. m/s (b) Find the mass of the object. kg
1. A 30.00 kg mass moving with the velocity of 10 m/s. The momentum of the...
1. A 30.00 kg mass moving with the velocity of 10 m/s. The momentum of the body will be A. 144.2 kg m/s. B. 187.8 kg m/s. C. 320.0 kg m/s. D. 442.4 kg m/s. E. None of the above 2. Out of the following which one is not a vector quantity? A. Force B. Impulse C. Mass D. velocity 3. Impulse is the product of which two quantities? A. Mass and Time B. Mass and Momentum C. Force and...
a 1 kg object is moving at 10 m/s. to double its kinetic energy, its speed...
a 1 kg object is moving at 10 m/s. to double its kinetic energy, its speed should be increased to approximately (?) a. 20 m/s^2 b. 7 m/s c. 14 m/s
An object has a kinetic energy of 296 J and a momentum of magnitude 21.3 kg-m/s....
An object has a kinetic energy of 296 J and a momentum of magnitude 21.3 kg-m/s. Find the speed and the mass of the object. speed m/s mass kg Three carts of masses m_1 = 5.00 kg, m_2 = 9.50 kg, and m_3 = 3.00 kg move on a frictionless, horizontal track with speeds of V_1 = 7.00 m/s to the right, v_2 = 3.00 m/s to the right, and v_3 = 3.50 m/s to the left, as shown below....
We learned in class that the kinetic energy (KE) of an object with mass m moving...
We learned in class that the kinetic energy (KE) of an object with mass m moving at velocity v is KE =½ m v^2. Accordingly, the kinetic energy (KE) per unit mass (m) of a body moving at velocity v is KE/m=v^2 /2. What is the asteroid’s kinetic energy per unit mass (J/kg) for an impact at this velocity? State your answer in units of J/kg. velocity is 29.8 km/s
A certain moving electron has a kinetic energy of 1.01 × 10−19 J. A. ) Calculate...
A certain moving electron has a kinetic energy of 1.01 × 10−19 J. A. ) Calculate the speed necessary for the electron to have this energy. The mass of an electron is 9.109 × 10−31 kg. Answer in units of m/s. B.) Calculate the speed of a proton having a kinetic energy of 1.01 × 10−19 J and a mass of 1.673 × 10−27 kg. Answer in units of m/s.
1) the kinetic energy of a 15.2 kg object traveling at 8.49 m/s is ___ J....
1) the kinetic energy of a 15.2 kg object traveling at 8.49 m/s is ___ J. 2) A 437.2 g sample of an unknown substance requires 8460 J to increase its temperature from 19.3 oC to 68.9 oC. The specific heat of the substance is ___ J/g oC. 3) A 437.2 g sample of an unknown substance requires 8460 J to increase its temperature from 19.3 oC to 68.9 oC. According to table 5.1 in the text, the sample may...
momentum of 20.2 kg m/s. I. A particle with kinetic energy equal to 293 J has...
momentum of 20.2 kg m/s. I. A particle with kinetic energy equal to 293 J has a m a. What is the mass of the particle? Ans b. Find the speed of the particle in m/s. Ans.
An object has a kinetic energy of 254 J and a momentum of magnitude 23.7 kg·m/s....
An object has a kinetic energy of 254 J and a momentum of magnitude 23.7 kg·m/s. Find the speed and the mass of the object. speed m/s mass kg
11. An object has kinetic energy of 196 J. If its speed is 7 m/s, what...
11. An object has kinetic energy of 196 J. If its speed is 7 m/s, what is its mass? A) 8 B) 56 C) 21.16601 D) 4.8
1. A 30.00 kg mass moving with the velocity of 10 m/s. The momentum of the body will be A. 144.2 kg m/s. B. 187.8 kg m/s. C. 320.0 kg m/s. D. 442.4 kg m/s. E. None of the above 2. Out of the following which one is not a vector quantity? A. Force B. Impulse C. Mass D. velocity 3. Impulse is the product of which two quantities? A. Mass and Time B. Mass and Momentum C. Force and...
An object has a kinetic energy of 296 J and a momentum of magnitude 21.3 kg-m/s. Find the speed and the mass of the object. speed m/s mass kg Three carts of masses m_1 = 5.00 kg, m_2 = 9.50 kg, and m_3 = 3.00 kg move on a frictionless, horizontal track with speeds of V_1 = 7.00 m/s to the right, v_2 = 3.00 m/s to the right, and v_3 = 3.50 m/s to the left, as shown below....
momentum of 20.2 kg m/s. I. A particle with kinetic energy equal to 293 J has a m a. What is the mass of the particle? Ans b. Find the speed of the particle in m/s. Ans.
11. An object has kinetic energy of 196 J. If its speed is 7 m/s, what is its mass? A) 8 B) 56 C) 21.16601 D) 4.8
Most questions answered within 3 hours.
-
20% of all students in a university are graduates and 80%are undergraduate..the probability that graduate students is married is 0.50 and the probability that an undergraduate student is married is .10.one student is selected at random what is the probabi
asked 7 minutes ago -
Maths
asked 13 minutes ago -
3)compare the two series for their variability ( using range ) Series A : 5,6,8,19,12,16,19,21,25 Series B: 25,30,30,35,40,45
asked 19 minutes ago -
Maths
asked 21 minutes ago -
Maths
asked 23 minutes ago -
Probability
asked 30 minutes ago -
A cab was involved in a hit and run accident at night. Two cab
companies, the...
asked 49 minutes ago -
Implement the ParkingLot.cpp with the given ParkingLot.hpp
*********************************************************************
ParkingLot.hpp
#pragma once
#include <queue>
#include "ClaimCheck.hpp"
#include...
asked 41 minutes ago -
Maths
asked 1 hour ago -
20)Let U={1,2,3,4,5,6,7,8,9,10}and A={1,3,5,7,9}Find A'
asked 1 hour ago -
For the sufficient condiions given statements identify the necessary and sufficient t: If you drive over 80 km ner hour. then you will get a fine.
asked 1 hour ago -
18)write the negation of the following statements s: All students study mathematics at the elementary level
asked 1 hour ago