A shooting star is a meteoroid that burns up when it reaches Earth’s atmosphere. Many of...
A shooting star is a meteoroid that burns up when it reaches Earth’s atmosphere. Many of these meteoroids are quite small. What is the kinetic energy of a meteoroid of mass 4.57 g moving at a speed of 49.1 km/s? What is the kinetic energy of a 1016-kg car moving at 28.3 m/s (63.3 mi/h)?
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A shooting star is a meteoroid that burns up when it reaches
Earth’s atmosphere. Many of...
A meteoroid of mass = 595 kg has a speed of 79.0 m/s when 800 km...
A meteoroid of mass = 595 kg has a speed of 79.0 m/s when 800 km
above the Earth. It is falling vertically (ignore air resistance)
and strikes a bed of sand in which it is brought to rest in 3.61
m.
(a) How much work does the force of gravity do on the meteoroid
on the way to the surface?
???? GJ
(b) What is the speed of the meteoroid just before striking the
sand?
???? m/s
(c) How...
1. A car of mass m = 1,500 kg (~midsized sedan), originally moving at 10 m/s...
1. A car of mass m = 1,500 kg (~midsized sedan), originally moving at 10 m/s (~ 22 mi/hr), accelerates until it reaches a speed of v = 20 m/s (~ 44 mi/hr). How much kinetic energy has the car gained? Please explain in detail. Thank you.
Linear Momentum of an object is conserved At all times b. Only when the net external...
Linear Momentum of an object is conserved At all times b. Only when the net external force on the object is Zero When the net external torque on the object is Zero d. Never A truck of mass 4000 (kg) is moving at 10 (m/s). A car of mass 1000 (kg) is moving at 40 (m/s). So, the truck’s momentum, compared to the car, is Greater b. Smaller c. the same d. Cannot say without knowing their accelerations A 1000...
A rocket carrying a new 945-kg satellite into orbit misfires and places the satellite in an...
A rocket carrying a new 945-kg satellite into orbit misfires and places the satellite in an orbit with an altitude of 175 km, well below its operational altitude in low-Earth orbit. (a) What would be the height of the satellite's orbit if its total energy were 450 MJ greater? km (b) What would be the difference in the system's kinetic energy? (Include the sign of the value in your answer.) Mj (c) What would be the difference in the system's...
2. Suppose a car travels 108 km at a speed of 20.0 m/s, and uses 2.20...
2. Suppose a car travels 108 km at a speed of 20.0 m/s, and uses
2.20 gallons of gasoline. Only 30% of the gasoline goes into useful
work by the force that keeps the car moving at constant speed
despite friction. (The energy content of gasoline is 1.3 ✕
108 J per gallon.)
(a) What is the force exerted to keep the car moving at constant
speed?
N
(b) If the required force is directly proportional to speed, how
many...
please answer all I beg you ASAP! and please try solving most of them thabk you...
please answer all I beg you ASAP! and please try solving most of
them thabk you so much
Question 23 (1 point) At an instant a traffic light turns green, a truck starts with a constant acceleration of 1.8 m/s2. At the same moment a taxi travelling with a constant speed of 8.5 m/s overtakes and passes the truck. Which two equations properly describe the position of the truck and the taxi? a) dtruck = 8.5at dtaxi = 8.5at b)...
please help and answer all ASAP please thank you so much Question 49 (1 point) When...
please help and answer all ASAP please thank you so much
Question 49 (1 point) When light travelling in glass enters glass with a higher index of refraction, the wave will be: a) partially transmitted with a change in phase b) transmitted forming a standing wave pattern in air c) reflected so as to form a node at the junction d) totally reflected at the junction e) partially reflected without a change in phase Question 38 (1 point) The charge,...
Question 1 1 pts What is the kinetic energy of a man who weighs 980N who...
Question 1 1 pts What is the kinetic energy of a man who weighs 980N who is riding in a car traveling 40 km per hour? Express your answer in Joules, but don't type the unit in the answer box. Round to the nearest whole number. (Careful with the units) 1 pts Astudent slides her 80.0-kg desk across the level floor of her dormitory room a distance 4.00 m at constant speed. If the coefficient of kinetic friction between the...
A meteoroid of mass = 595 kg has a speed of 79.0 m/s when 800 km
above the Earth. It is falling vertically (ignore air resistance)
and strikes a bed of sand in which it is brought to rest in 3.61
m.
(a) How much work does the force of gravity do on the meteoroid
on the way to the surface?
???? GJ
(b) What is the speed of the meteoroid just before striking the
sand?
???? m/s
(c) How...
A rocket carrying a new 945-kg satellite into orbit misfires and places the satellite in an orbit with an altitude of 175 km, well below its operational altitude in low-Earth orbit. (a) What would be the height of the satellite's orbit if its total energy were 450 MJ greater? km (b) What would be the difference in the system's kinetic energy? (Include the sign of the value in your answer.) Mj (c) What would be the difference in the system's...
2. Suppose a car travels 108 km at a speed of 20.0 m/s, and uses
2.20 gallons of gasoline. Only 30% of the gasoline goes into useful
work by the force that keeps the car moving at constant speed
despite friction. (The energy content of gasoline is 1.3 ✕
108 J per gallon.)
(a) What is the force exerted to keep the car moving at constant
speed?
N
(b) If the required force is directly proportional to speed, how
many...
please answer all I beg you ASAP! and please try solving most of
them thabk you so much
Question 23 (1 point) At an instant a traffic light turns green, a truck starts with a constant acceleration of 1.8 m/s2. At the same moment a taxi travelling with a constant speed of 8.5 m/s overtakes and passes the truck. Which two equations properly describe the position of the truck and the taxi? a) dtruck = 8.5at dtaxi = 8.5at b)...
please help and answer all ASAP please thank you so much
Question 49 (1 point) When light travelling in glass enters glass with a higher index of refraction, the wave will be: a) partially transmitted with a change in phase b) transmitted forming a standing wave pattern in air c) reflected so as to form a node at the junction d) totally reflected at the junction e) partially reflected without a change in phase Question 38 (1 point) The charge,...
Question 1 1 pts What is the kinetic energy of a man who weighs 980N who is riding in a car traveling 40 km per hour? Express your answer in Joules, but don't type the unit in the answer box. Round to the nearest whole number. (Careful with the units) 1 pts Astudent slides her 80.0-kg desk across the level floor of her dormitory room a distance 4.00 m at constant speed. If the coefficient of kinetic friction between the...
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