Each face of a solid figure is called either a base or a lateral face. Solid figures generally have one or two bases. If it has two, these bases are parallel. If a figure has two parallel bases and lateral faces, such as in a prism, the bases will be perpendicular to the lateral faces.
True or False
It takes much more force to blast a soft ball 50 meters than it does to hit a golf ball 50 meters.
Answer:
False
Explanation:
The softball is bigger, but it is lighter, which means it has a better chance of getting farther way faster with a lighter amount of force. On the other hand, the golfball is heavier, which would take more force to move it a certain distance.
Answer: false
Explanation:
• Defines what the “natural” states of motion are, either at rest and constant
velocity. In essence, the first law sets up the basis to define what accelerated
motion is, which we address with Newton’s 2nd law.
• Defines the type of coordinate systems so that Newton’s laws are valid. These
coordinate systems are called inertial reference frames.
In any ecosystem_______, are the point of entry for new energy
Answer:
The answer is Producer. Hope this helps!
Answer:
Producer
Explanation:
They keep the food chain stable... without producers there wouldnt be and animals. They are the key to the food chain.
A bullet is fired from a rifle with an initial velocity of 300 m/s at an angle of 25 degrees from the horizontal.
1. Calculate the horizontal and vertical components of the velocity
2. Calculate the time spent in the air
3. Calculate the maximum height
4. Calculate the horizontal distance
Answer:
1. The horizontal component of the velocity is approximately 271.89 m/s
The vertical component of the velocity is approximately 126.79 m/s
2. The time the bullet spends in the air is approximately 25.85 seconds
3. The maximum height reached by the bullet is approximately 819.35 meters
4. The horizontal distance is approximately 7028.36 meters
Explanation:
The initial velocity of the bullet = 300 m/s
The angle at which the bullet was fired, θ = 25° from the horizontal
1. The horizontal component of the velocity vₓ = The component of the velocity in the x-direction
vₓ = v × cos(θ)
Substituting gives;
vₓ = 300 × cos(25°) ≈ 271.89 m/s
The vertical component of the velocity [tex]u_y[/tex] = The component of the velocity in the y-direction
[tex]v_y[/tex] = v × sin(θ)
Substituting gives;
[tex]u_y[/tex] = 300 × sin(25°) ≈ 126.79 m/s
2. The time the bullet takes to maximum height, t = 1/2 × The time the bullet spends in the air
The following is the relevant kinematic equation for the vertical motion of the bullet;
v = u - g × t
Where;
[tex]v_y[/tex] = The final velocity vertical velocity = (0 at maximum height)
[tex]u_y[/tex] = The initial vertical velocity ≈ 126.79 m/s
g = The acceleration due to gravity = 9.81 m/s²
t = The time in flight of the bullet
Substituting gives;
0 = 126.79 - 9.81 × t
t ≈ 126.79/9.81 ≈ 12.924 s
The time the bullet spends in the air = 2 × The time the bullet takes to maximum height
∴ The time the bullet spends in the air ≈ 2 × 12.924 ≈ 25.85
The time the bullet spends in the air ≈ 25.85 seconds
3. The maximum height reached is given from the following kinematic equation;
[tex]u_y[/tex]² = 2 × g × h
Where;
h = The maximum height reached by the bullet
∴ h = [tex]u_y[/tex]²/(2 × g)
h = 126.79²/(2 × 9.81) = 819.35
The maximum height reached by the bullet = h = 819.35 meters
4. The horizontal distance travelled by the bullet = Horizontal component of the velocity of the bullet × The time the bullet spends in the air
∴ The horizontal distance travelled by the bullet = 271.89 × 25.85 ≈ 7028.36
The horizontal distance travelled by the bullet ≈ 7028.36 meters.
A 3kg ball is swung on the end of a 1m long string that is twirled with a speed of 3.2 m/s. What is the centripetal acceleration acting on the ball?
Answer:
The centripetal acceleration acting on the ball is 10.24 m/s²
Explanation:
Given;
mass of the ball, m = 3 kg
radius of the swing arm, r = 1 m
speed of the ball, v = 3.2 m/s
centripetal acceleration is given by;
a = v² / r
a = (3.2)² / 1
a = 10.24 m/s²
Therefore, the centripetal acceleration acting on the ball is 10.24 m/s²
Question: What is this? (look in image attached)
Answer:
C. all of the above.
Explanation:
up at the top it says solar power bank.
in the boxes below it says LED flashlight and solar energy.
it is all of the above.
please helpp!! Questions 1-5
Answer:
1.
A:Time (minutes)
B: Temp(degrees c)
2. Downward trend (temperature goes down as time goes on )
3.
A: not sure
B: temperature
4.the temperature is going down
5. Closes off any open airways
. How much power is used to move a 5 kg mass 28 meters in 8 seconds?
Answer:
171.5Watts
Explanation:
Given parameters:
Mass = 5kg
Distance = 28m
Time = 8s
Unknown:
Power = ?
Solution:
Power is the rate at which work is done;
Power = [tex]\frac{work done }{time taken}[/tex]
Work done = force x distance = mg x d =
m is the mass
g is the acceleration due to gravity
d is the distance
Work done = 5 x 9.8 x 28 = 1372J
Power = [tex]\frac{1372}{8}[/tex] = 171.5Watts
a kid uses a slingshot to shoot a rock at a target. when the kid applies a net force of 8.68 N forward, the rock accelerates at a rate of 12.4 m/s^2 forward. What is the rocks mass?
Answer:
0.7kg
Explanation:
Given parameters:
Force on the rock = 8.68N
Acceleration = 12.4m/s²
Unknown:
Mass of the rock = ?
Solution:
From newton's second law of motion, the net force on a body is the product of mass and acceleration
Net force = mass x acceleration
Now insert the parameters and solve the problem;
8.68 = mass x 12.4
mass = [tex]\frac{8.68}{12.4}[/tex] = 0.7kg
What is Burgers????????????????????
Answer:
food
Explanation:
its is a fast food option or homemade option of ground beef made into a patty and put on buns
An orange of mass m falls into a wagon. Assume the orange experiences upward acceleration magnitude a
when it comes in contact with the wagon.
What is the correct expression for the normal force magnitude Fn exerted on the orange?
Answer:f^n=m(a+g)
Explanation:khan academy said
4. If 1 car is going faster than another traveling in the same direction, can they have the same velocity? Why or why
not?
Help please 15 points ??? ASAP
Answer:
No, because objects have the same velocity only if they are moving at the same speed and in the same direction. Objects moving at different speeds, in different directions, or both have different velocities. The average velocity of an object moving in a constant direction is calculated with the formula: velocity = distance/time.
Explanation:
Look at my comment if you are still confused. I think this article will help with acceleration and velocity.
A distance-time graph indicates that an object travels 2 m in 2 s and then travels another 80 m during the next 40 s. What is the average speed of the object? 2 m/s 8 m/s 4 m/s 10 m/s
Answer:
1.92 the aver...
Explanation:
Answer:
Its 2 miles every second
Explanation:
(c) Why is the telescope adjusted for a distant object in a spectrometer
Answer:
The telescope is adjusted to receive parallel rays by turning it towards a distant object and adjusting the distance between the objective lens and the eyepiece to get a clear image on the cross wire.
The telescope is turned towards a far-off object, and the distance between the objective lens and the eyepiece is adjusted to produce a clear image on the cross wire.
What is telescope?A telescope is a tool for creating enlarged views of far-off things. The telescope is without a doubt the most significant research tool in astronomy. It offers a way to gather and examine radiation coming from astronomical objects, even those at the edge of the cosmos.
When Galileo used the telescope to investigate alien bodies in the early 17th century, he revolutionized astronomy.
Magnification tools had never been employed for this purpose before until that point. The distance between the objective lens and the eyepiece is adjusted to provide a crisp image on the cross wire as the telescope is pointed towards a distant object.
Learn more about telescope here:
https://brainly.com/question/556195
#SPJ2
A 950 kg truck accelerates from rest to 15 m/s in 2.3 seconds as it drives down a rough road. If the forward force of the engine is 7000 newtons, determine the force of friction between the tires and the road. 804 N 6,196 N 7,250 N 14,250 N
Answer:
804 N
Explanation:
We are given;
Mass; m = 950 kg
Initial velocity; u = 0 m/s
Final velocity; v = 15 m/s
Time; t = 2.3 s
Engine force; F_e = 7000 N
From Newton's first equation of motion;
v = u + at
15 = 0 + 2.3a
a = 15/2.3
a = 6.5217 m/s²
From Newton's second law of motion and since friction always opposes motion, we have;
F_e - F_f = ma
Where F_f is frictional force.
Thus;
F_f = F_e - ma
F_f = 7000 - (950 × 6.5217)
F_f ≈ 804 N
Please help me with this question :(
I have a test soon and I want to be prepared..
Detailed solutions please!
(I’ll give you 25points)
Answer:
[tex]\boxed{\text{\sf \Large 50 N}}[/tex]
Explanation:
Sum of the vertical forces is zero
F₁ + F₂ - Z = 0
Z is negative since Z acts in the opposite direction from F₁ and F₂
30 + 20 - Z = 0
Z = 50
One least interesting thing about collisions?
definition of acute fracture
Answer:
Explanation:
Traumatic fractures (also called acute fractures) are caused by a direct blow or impact, such as seriously stubbing your toe. Traumatic fractures can be displaced or nondisplaced. If the fracture is displaced, the bone is broken in such a way that it has changed in position (malpositioned).
Answer:
Traumatic fractures can be displaced or nondisplaced.
Explanation:
Please help me What will happen to an object if it is put into motion in space? A It will stop eventually B It will continue to move until it is acted upon by an unbalanced force C It will speed up over time D It will slow down over time
I think your answer is b.
(6.1) What are atoms? What particles are they composed of? What is the relative location and charge of each particle?
Answer:
Atoms are the smallest point of matter they are composed of protons nutrons and electrons protons and nutrons are located in the nucleus electrons are in the electron cloud the charge of protons is a positive charge electrons are negative and nutrons are nutrul.
A soccer ball is kicked at an angle of 40 degrees with an initial velocity of
14 m/s. What is the horizontal velocity in m/s? (Do not state units, and give
answers to the hundredths place.) *
Answer:
[tex]v_x=10.72\ m/s[/tex]
Explanation:
Projectile Motion
It's the type of motion that experiences an object launched near the Earth's surface and moves along a curved path exclusively under the action of gravity.
Being vo the initial speed of the object, and θ the initial launch angle, the two components of the velocity are given by:
[tex]v_x=v_o\cos\theta[/tex]
[tex]v_y=v_o\sin\theta-g.t[/tex]
The soccer ball is kicked at an angle of 40° with an initial speed of vo=14 m/s.
The horizontal component is:
[tex]v_x=14\cos 40^\circ[/tex]
Calculating:
[tex]v_x=14\cdot 0.766[/tex]
[tex]\mathbf{v_x=10.72\ m/s}[/tex]
The amount of energy required to heat 0.5 kilograms of water until the temperature increases 12° C is about
A. 12 calories.
B. 60 calories.
C. 6,000 calories.
D. 12,000 calories.
Answer:
C. 6,000
Explanation:
PLEASE HELP!
Picture 1: Draw the force diagram for Mı if there is
friction on the table.
Picture 1: Draw the force diagram for M4 if there is
friction on the table.
Answer:
When a body is placed on a table top, it exerts a force equal to its weight downwards on the table top but does not move or fall. (i) Name the force exerted ...
The matter in this series of images is going through a change. Draw a conclusion about the type of change shown. Is it a physical change or chemical change?
Answer:
chemical change
Explanation:
30 points plz help ill do anything... literally anything.
A car moving at 10 m/s slows to a stop.
It moves 25 meters forward while braking.
1. How much time does it take to slow to a stop? Explain how you found your answer.
2. What is its braking acceleration? Explain how you found your answer.
Answer:
1. 2.5s
Explanation:
1. For time, divide Distance / speed
25m / 10
=2.5s
A star has right ascension of 5 hours. Which of these statements is correct about the star?
A. It is five hours to the west of zero hours right ascension.
B. It is five hours to the east of zero hours right ascension.
C. It is five hours to the north of zero hours right ascension.
D. It is five hours to the south of zero hours right ascension.
Answer:
I believe the answer is A, it is to the west as the right ascension is only east and west
Explanation:
When i took the quiz, I put east and had gotten it incorrect.
4. A hiker leaves camp and using a compass walks 4 km East, 6 km South, 3 km East, 5 km North, 10 km West, 8 km North and 3 km South. What is his total displacement?
Answer:
Because the hiker walked directly west and then directly north the two legs of the hike forms a right triangle. Therefore we can use the Pythagorean Theorem to solve this problem.
c=5
The hiker is 5km from camp and should head in a generally south-east direction
To open and close a circuit, a
can be used.
Do you think scientists should continue to explore nuclear energy as a source of electricity? Explain your opinion and provide reasons. Include an opposing opinion about another energy source.
Answer:
See explanation
Explanation:
Nuclear energy refers to energy trapped in the nucleus of atoms. Nuclear energy holds the greatest promise for large scale electricity generation. For instance, the amount of energy released by a given mass of uranium is 2.5 million times the energy released by combustion of an equal mass of carbon.One gram of uranium produces the same energy as 1 ton of coal, 17000 cubic feet of natural gas, 5000 pounds of wood and 149 gallons of oil.
Nuclear energy does not pollute the atmosphere as fossil fuels do. However, the challenges of effective control of the nuclear reactor and disposal of radioactive waste still remain a serious concern.
However, exploitation of nuclear energy as a source of electricity remain expensive and it is not quite easy to set up a nuclear power plant. Not many countries can afford to pay for the services of experts who operate nuclear energy plants talk more of providing the required equipment.
A farmer is walking through a field at a velocity of +0.5 meters per second (m/s) relative to the ground. At the same time, he is throwing seeds in front of him at a velocity of +2.1 m/s relative to himself. What is the velocity of the seeds relative to the ground as they travel through the air?
Answer:
The velocity of the seeds relative to the ground as they travel through the air is 2.6 meters per second.
Explanation:
From Physics, we know that the absolute velocity of the seeds ([tex]v_{S}[/tex]) is the sum of the absolute velocity of the farmer ([tex]v_{F}[/tex]) and the velocity of the seeds relative to the farmer ([tex]v_{S/F}[/tex]), all measured in meters per second. That is:
[tex]v_{S} = v_{F}+v_{S/F}[/tex] (1)
If we know that [tex]v_{F} = 0.5\,\frac{m}{s}[/tex] and [tex]v_{S/F} = 2.1\,\frac{m}{s}[/tex], then the velocity of the seeds relative to the ground is:
[tex]v_{S} =0.5\,\frac{m}{s} + 2.1\,\frac{m}{s}[/tex]
[tex]v_{S} = 2.6\,\frac{m}{s}[/tex]
The velocity of the seeds relative to the ground as they travel through the air is 2.6 meters per second.
What is the mechanical advantage of a lever that is 20 meters
long and uses 10,200 N to lift a 6,000-kg dump truck 3 meters
into the air?
Answer:
5.765
Explanation:
Answer:
5.765
Explanation: