Answer:
1. mass = 4
2. mass = 6
3. mass = 0.28
Explanation:
All these questions require the equation:
F=ma
Where F is force, m is mass and a is accleration. If we do some algebra, we can modify this equation to find mass by dividing both sides by a.
[tex]F=ma --> \frac{F}{a} =\frac{ma}{a} --> \frac{F}{a} = m[/tex]
The a on the left side cancels out and leaves us with [tex]\frac{F}{a}=m[/tex]. Now we can plug in the numbers given to find the mass.
1.[tex]\frac{F}{a} =m-->\frac{20.0}{5.0}=m-->m=4[/tex]
2.[tex]\frac{F}{a} =m -->\frac{12.0}{2.0} =m -->m=6[/tex]
3.[tex]\frac{F}{a}=m--> \frac{4.6}{16.3}=m--> m=0.28[/tex]
So the answers are m=4, m=6, and m=0.28.
1. A kettle contains 1.5kg of water at a
temperature of 18°C. How much energy is
needed to bring the water to the boil?
Answer:
water boiling point is usually 100°C so I think we subtract 18 degrees Celsius from 100 degrees Celsius to get 82 degrees Celsius to be the energy needed
Why is it difficult to charge a metallic rod with the method of friction?
pls answer quick
I got exam tomorrow
Insulators can be easily charged by friction as the extra electrons gained CANNOT easily escape. Conductors: materials that allow electrons to flow through them easily. Conductors CANNOT be easily charged by friction as the extra electrons gained can easily escape. When negatively charged rod is put near a metal can
Kara is pushing a shopping cart to the right. The applied force is acting _______.
A.) upward
B.) downward
C.) to the left
D.) to the right
Answer:
D.) to the right
Kara is pushing a shopping cart to the right. The applied force is acting _______.
A.) upward
B.) downward
C.) to the left
D.) to the right
Answer:
D
Explanation:
D.) to the right
plz answer this...its urgent!!
its about gravitation..only 3 questions
Answer: For #1, 7.3 m/s2.
Explanation: See this wikipedia screenshot for explanation, it's complicated.
A golfer hits a ball at 10.5 m/s at an angle of 25 degrees.
a) How long will the ball be moving?
B) How far will the ball go? C) How high will the ball go?
Which pair has the same electron configuration?
a. Cl- and Ar
b. Cl- and Ar
c. CI and Ar
d. CI+ and Ar
Answer:
Cl- and Ar is the right answer:-)
Define malleability?
Answer:
Explanation:
the quality or state of being malleable: such as. a : capability of being shaped or extended by hammering, forging, etc. the malleability of tin.
What is the formula for freefall?
Answer: vf = g * t
Explanation:
G represents the acceleration of gravity.
T represents time so multiply the acceleration of gravity times time.
what is the temperature of air if the speed of sound is 295m/s?
Answer:
Explanation:The speed of sound depends on several variables, but the only independent variable we need to calculate the speed of sound ... Enter your air temp and choose your units: The speed of sound: mph. Fahrenheit, knots. Celsius, m/s. Kelvin, ft/s.
ANSWER ASAP PLEASE!!
The energy is different within each wave type across the spectrum true or false
Answer:
T kinda waky tho -_-----_-----_-////_----_---///
Explanation:
Answer:
true
Explanation:
PLSS THIS LOOKS SIMPLE Tina throws a softball up with an initial speed of 25 meters per second. Calculate the maximum height that the ball will reach.
Answer:
31.86m
Explanation:
recall that one of the equations of motion can be written
v² = u² + 2as
where
u = initial velocity = 25m/s
v = final velocity = 0m/s because at maximum height, the ball will momentary stop moving (i.e have zero velocity)
a = acceleration = -9.81m/s² (i.e a deceleration as it moves upwards equal to the magnitude of the gravitational acceleration)
s = distance (we are asked to find this)
substituting these into the equation:
v² = u² + 2as
0² = 25² + 2(-9.81)s
0 = 625 - 19.62s
19.62s = 625
s = 625 / 19.62
s = 31.86m
How many
different
elements are
present in
C6H12O6 ? How do you know
[10 POINTS ❗️❗️ and brainlist :)]
Roy throws a ball up in the air. Each time he throws the ball up in any direction, it falls back to the ground as shown in the illustration. The ball comes back to the ground because of the
A) weak electric force of the earth.
B) strong magnetic force of the earth.
C) force of air resistance on the ball.
D) strong gravitational force of the earth.
Answer:
D) Strong gravitational force of the earth
Explanation:
Gravitational force is the force that attracts to objects with mass.This forces tries to pull masses together, that is why attractive in nature.
an average net force of 31.6 N is used to accelerate a 15.0 kg object uniformly from rest to 10.0 m/s leftward. What is the change in momentum?
Answer:
-150 kg m/s
Explanation:
The change of momentum is calculated as ;
Δp= m*Δv where
where
Δp= change in momentum
Δv = vf-vi
m= mass of the object
Change in momentum is also calculated when using the formula;
Δp = F * Δt when F is the net force applied and Δt is the time of action.
In this case;
m= 15 kg
vf= -10 m/s
vi= 0 m/s
Taking rightward direction to be positive, then leftward will be negative.
Applying the formula as;
Δp = m*Δv
Δp = 15 * { -10 -0} = 15*-10 = -150 kg m/s
Define kinetic energy in your own words, and write a statement about how kinetic energy is affected as velocity increases.
Q: How can variations in the rate of interaction between the hydrosphere and the atmosphere result in global climate change?
A. by causing droughts and floods
B. by producing more greenhouse gases
C. by changing the amount of water on Earth
D. by decreasing the atmospheric temperature
A 2 kg toy car moves at a speed of 5 m/s. a. What is the kinetic energy of the car?
Answer:
25 JExplanation:
The kinetic energy of the toy car can be found by using the formula
[tex]k = \frac{1}{2} m {v}^{2} \\ [/tex]
m is the mass
v is the velocity
From the question we have
[tex] k = \frac{1}{2} \times 2 \times {5}^{2} \\ = 1 \times {5}^{2} [/tex]
We have the final answer as
25 JHope this helps you
You pull horizontally on a 50 kg crate with a force of 400N and the friction force on the crate in 150N. What is the acceleration of the crate?
If you pull horizontally on a 50 kg crate with a force of 400 N and the friction force on the crate of 150 N, then the acceleration of the crate would be 5 m / s² .
What is Newton's second law?Newton's Second Law states that The resultant force acting on an object is proportional to the rate of change of momentum.
As given in the problem if you pull horizontally on a 50 kg crate with a force of 400 N and the friction force on the crate in 150 N.
The net force acting on the crate = 400 N - 150 N
= 250 N
The acceleration of the crate = 250 / 50
= 5 m / s²
Thus, the acceleration of the crate would be 5 m / s² .
Learn more about Newton's second law here, refer to the link given below ;
brainly.com/question/13447525
#SPJ2
There is a spot of paint on the front wheel of the bicycle. Take the position of the spot at time t=0 to be at angle θ=0 radians with respect to an axis parallel to the ground (and perpendicular to the axis of rotation of the tire) and measure positive angles in the direction of the wheel's rotation. What angular displacement θ has the spot of paint undergone between time 0 and 2 seconds?
Here is the missing information.
An exhausted bicyclist pedal somewhat erraticaly when exercising on a static bicycle. The angular velocity of the wheels takes the equation ω(t)=at − bsin(ct) for t≥ 0, where t represents time (measured in seconds), a = 0.500 rad/s2 , b = 0.250 rad/s and c = 2.00 rad/s .
Answer:
0.793 rad
Explanation:
From the given question:
The angular velocity of the wheel is expressed by the equation:
[tex]\omega (t) =\dfrac{d\theta}{dt}[/tex]
The angular velocity of the wheels takes the description of the equation ω(t)=at−bsin(ct)
SO;
[tex]\dfrac{d \theta}{dt} = at - b \ sin \ ct[/tex]
dθ = at dt - (b sin ct) dt
Taking the integral of the above equation; we have:
[tex]\int \limits^{\theta}_{0} \ d \theta = \int \limits ^{t=2}_{0} at \ dt - (b \ sin \ ct) \dt[/tex]
[tex][\theta] ^{\theta}_{0} = a \bigg [\dfrac{t^2}{2} \bigg]^2_0 - \bigg[ -\dfrac{b}{c} \ cos \ ct \bigg] ^2_0[/tex]
where;
a = 0.500 rad/s2 ,
b = 0.250 rad/s and
c = 2.00 rad/s
[tex]\theta = (0.500 \ rad/s^2 ) \bigg [\dfrac{(2s)^2}{2} \bigg] - \bigg[ -\dfrac{0.250 \ rad/s}{2.00 \ rad/s} \ cos \ (2.00 \ rad/s )( 2.00 \ s) \bigg] - \bigg [ \dfrac{0.250 \ rad/s}{2.00 \ rad/s}\bigg ] cos 0^0[/tex]
[tex]\mathbf{\theta = 0.793 \ rad}[/tex]
Hence, the angular displacement after two seconds = 0.793 rad
Which of the following is strenuous?
Atraining for an athletic competition
Bsharing a candy bar with a friend
Creading an exciting mystery
Dforgetting to complete your homework
Answer:
I think it c
Explanation:
Answer:
Atraining for an athletic competition
What are the three sources of heat (energy) on earth?
if light photons are massless then why are they attracted by black holes?
Answer:
Photons have no mass, they do have energy, and the gravity of a black hole (or any other gravitating body) will attract them.
Explanation:
is that what you wanted?
An example of a chemical change is water boiling
Answer:
False, Boiling water is an example of a physical change and not a chemical change
Answer:
yes
Explanation:
cos from the boiling water, you can still get another change
At its closest approach, a moon comes within 200,000 km of the planet it orbits. At that point, the moon is 300,000 km from the other focus of its orbit, f2. The planet is focus f1 of the moon's elliptical orbit. How far is the moon from the planet when it is 260,000 km from f2?
Answer:
s₁ = 240,000 km
Explanation:
The distance between both the focuses f₁ and f₂ will be the sum of distances of the moon from each focus at a given point. Therefore,
s = s₁ + s₂
where,
s = total distance between the focuses = ?
s₁ = distance between f1 and moon = 200,000 km
s₂ = distance between f₂ and moon = 300,000 km
Therefore,
s = 200,000 km + 300,000 km
s = 500,000 km
Now, when the distance from f₂ becomes 260,000 km, then the distance from f₁(planet) will become:
s = s₁ + s₂
500,000 km = s₁ + 260,000 km
s₁ = 500,000 km - 260,000 km
s₁ = 240,000 km
What is the average translational KE of 5 moles of gas molecules at 300 K?
a.
2.1 x 103 J
b.
1.87 x 104 J
c.
1.78 x 105 J
d.
1.68 x 106 J
Answer:
What is the average translational kinetic energy of molecules in an ideal gas at 37°C? The average translational energy of a molecule is given by the equipartition theorem as, E = 3kT 2 where k is the Boltzmann constant and T is the absolute temperature.
Explanation:
The average translational energy of a molecule is given by the equipartition theorem as, E = 3kT 2 where k is the Boltzmann constant and T is the absolute temperature.
which type of energy is released when a nucleus is split apart?
a. kinetic energy
b. elastic energy
c. chemical energy
d. nuclear energy
Answer:
D. Nuclear energy
Explanation:
A nucleus is the result of nuclear energy if it is split into an other the same result shall happen it being nuclear energy.
A block weighing 35 N is resting on a steel table (us = 0.40).
The minimum force to start this block moving is ___ N.
Answer: 14
Explanation:
Force(normal)*coefficient
The static friction force is a force that prevents motion of an object kept on a surface, due to the interaction of the surface of the object and the surface on which it is kept
The minimum force required to start the block moving is 14 NReason:
The known parameter are;
The weight of the block, W = 35 N
The static friction of the surface of the table surface, [tex]\mu_s[/tex] = 0.40
Required:
To find the minimum force to start the block moving
Solution:
The force required to start the block moving is given by the frictional force that needs to be surpassed
Force required, F = Force of friction
Force of friction = Normal reaction × Coefficient of static friction
On a flat surface, the normal reaction = The weight of the object
∴ Force of friction, [tex]F_f[/tex] = Weight of the object × Coefficient of static friction
Which gives;
[tex]F_f = W \times \mu_s[/tex]
[tex]F_f = 35 \, N \times 0.40 = 14 \, N[/tex]
Force required, F = Force of friction, [tex]F_f[/tex] = 14 N
The minimum force required to start the block moving, F = 14 N
Learn more about the static friction force here:
https://brainly.com/question/13877320
What does is the glenohumeral joint and what does it do? (ANATOMY)
Best Answer gets Brainiest
Draw the (Quantitative) velocity vs time graphs for an object whose motion produced the position vs time graphs in the graphs below. Show your work.
Answer:
yoo yoo
24
Explanation: