A mass of 90 kg weighs 882 newtons (198.4 pounds) on the earth. (rounded)
A student with a mass of 90 kg on the earth (gravity =9.8m/s/s) will have a weight of 882 Newtons. Weight = Mass * Gravity
.7x-.6x=9, .1x=9, x=9/.1=90 students
Since 38+90=128 128+38 = 166 So there is 166 students
140
Density = Mass/Volume = 0.622... grams per ml
A student with a mass of 90 kg on the earth (gravity =9.8m/s/s) will have a weight of 882 Newtons. Weight = Mass * Gravity
Pretty big.
Micrograms is a measure of weight or mass. 90 micrograms is equal to about 0.000003175 ounces.
Weight = (mass) x (acceleration due to gravity)= 90kg x 9.8ms-2= 882N
On Earth, 90 kg of mass weighs 882 newtons (198.4 pounds).
Weight = m g = (90 x 10) = 900 newtons
Unfortunately, this was probably asked by a potential American student and shows that we are far behind in basic math; 90.
On my planet a man with a mass of 90 kg has a weight that is also 90 kg. On the Moon the same 90 kg man has a weight of 15 kg because the Moon is smaller and has less gravity. We distinguish between mass (amount of matter) and weight (a downward force) so that mass stays the same wherever the man is, even if his weight changes. Since Isaac Newton's time we know that force is equal to mass times acceleration, and the unit of force is defined technically as the force that accelerates a mass of 1 kg by 1 metre per second, every second. That amount of force is a Newton. If a 1-kg mass is dropped it will accelerate downwards at 9.806 metres per second per second, therefore the force on it is 9.806 Newtons. So the weight of a 90 kg man is technically described as 90 x 9.806 Newtons, in other words 882 Newtons. On the Moon his mass is still 90 kg but his weight is now only 147 Newtons.
The atomic weight of thorium-232 is approximately 232.03806 atomic mass units (u).
As written, any number of students could go on the field trip. If you stipulate that every student must have at least one juice box and one pack of crackers, then 90 students can go but that's going to leave some very hungry chaperones.
110 students, 90 adults.
Thorium, with the chemical symbol Th, is the chemical element with the atomic number 90.